Signal transmission method, receiver, transmitter, and communication device
阅读说明：本技术 信号传输方法、接收机、发送机和通信装置 (Signal transmission method, receiver, transmitter, and communication device ) 是由 占兆武 王祥 武占侠 李龙 于 2021-07-21 设计创作，主要内容包括：本发明涉及通信技术领域,具体涉及信号传输方法、接收机、发送机和通信装置。信号传输方法,应用于接收端,包括：接收第一通信信道的第一路信号与第二通信信道的第二路信号,所述第一路信号与所述第二路信号包括相同的数据信息；将所述第一路信号和所述第二路信号合并成第三信号,所述第三信号的信噪比是所述第一路信号的信噪比和所述第二路信号的信噪比之和；获取所述第三信号中的数据信息。在本技术方案中,第一路信号和第二路信号均含有目标信号的数据信息,克服第一通信信道和第二通信信道各自的缺点,充分结合第一通信信道和第二通信信道各自的通信优势,利用双模通信来提升目标信号通信传输的可靠性。(The present invention relates to the field of communications technologies, and in particular, to a signal transmission method, a receiver, a transmitter, and a communication apparatus. The signal transmission method is applied to a receiving end and comprises the following steps: receiving a first path of signal of a first communication channel and a second path of signal of a second communication channel, wherein the first path of signal and the second path of signal comprise the same data information; combining the first path of signal and the second path of signal into a third signal, wherein the signal-to-noise ratio of the third signal is the sum of the signal-to-noise ratio of the first path of signal and the signal-to-noise ratio of the second path of signal; and acquiring data information in the third signal. In the technical scheme, the first path of signal and the second path of signal both contain data information of the target signal, so that the respective defects of the first communication channel and the second communication channel are overcome, the respective communication advantages of the first communication channel and the second communication channel are fully combined, and the reliability of communication transmission of the target signal is improved by utilizing dual-mode communication.)
1. A signal transmission method applied to a receiving end is characterized by comprising the following steps:
receiving a first path of signal of a first communication channel and a second path of signal of a second communication channel, wherein the first path of signal and the second path of signal comprise the same data information;
combining the first path of signal and the second path of signal into a third signal, wherein the signal-to-noise ratio of the third signal is the sum of the signal-to-noise ratio of the first path of signal and the signal-to-noise ratio of the second path of signal;
and acquiring data information in the third signal.
2. The signal transmission method according to claim 1, wherein the first communication channel comprises a wireless communication channel, and the second communication channel comprises a power line communication channel.
3. The signal transmission method according to claim 2, further comprising:
receiving a radio frequency signal transmitted by the wireless communication channel;
down-converting the radio frequency signal into an analog baseband signal by using a radio frequency front end;
sampling the analog baseband signal by using an analog-to-digital converter to obtain a first time domain discrete signal;
sending the time domain discrete signal to a first orthogonal frequency division multiplexing demodulator to demodulate the first time domain discrete signal;
receiving a first frequency domain discrete signal demodulated by the first orthogonal frequency division multiplexing demodulator;
and obtaining a first path of signal according to the first frequency domain discrete signal.
4. The signal transmission method according to claim 3, further comprising:
receiving a power signal transmitted by a power line communication channel, wherein the power signal and the radio frequency signal comprise the same data information;
processing the power signal by using a power line communication decoupler to extract a broadband carrier signal, wherein the broadband carrier signal is an analog signal;
sampling the broadband carrier signal by using an analog-to-digital converter to obtain a second time domain discrete signal;
sending the second time domain discrete signal to a second orthogonal frequency division multiplexing demodulator to demodulate the second time domain discrete signal;
receiving a second frequency domain discrete signal demodulated by the second orthogonal frequency division multiplexing demodulator;
and obtaining the second path of signal according to the second frequency domain discrete signal.
5. The signal transmission method according to claim 4, wherein demodulation parameters of the first OFDM demodulator and the second OFDM demodulator are the same, so that the first path of signal and the second path of signal include the same data information.
6. A signal transmission method is applied to a sending end and is characterized by comprising the following steps:
separating a target signal into a radio frequency signal and a power signal, wherein the power signal, the radio frequency signal, and the target signal comprise the same data information, the target signal being associated with a third signal;
transmitting the radio frequency signal to a receiving end by using a wireless communication mode;
and transmitting the power signal to the receiving end by using a power line carrier communication mode.
7. The signal transmission method according to claim 6, wherein the sending the radio frequency signal to a receiving end by using a wireless communication manner comprises:
performing up-conversion on the radio frequency signal by using a radio frequency front end;
and sending the radio frequency signal subjected to the up-conversion to the receiving end in a wireless communication mode.
8. A receiver, characterized in that it is configured to carry out the signal transmission method according to any one of claims 1 to 5.
9. A transmitter, characterized by being configured to perform the signal transmission method according to claim 6 or 7.
10. A communication apparatus comprising the receiver of claim 8 or the transmitter of claim 9.
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a signal transmission method, a receiver, a transmitter, and a communication apparatus.
Background
The power line carrier communication is a communication mode using a power line as a channel, and has the advantages of low investment, short construction period, simple equipment, safe communication, good real-time performance, long communication distance, capability of overcoming the great signal attenuation caused by building walls and the like, so that the power line carrier communication is currently applied to the centralized meter reading service in the power industry in a large area.
However, since power lines are designed primarily for power transmission, the characteristics of the resulting power line communication channel pose significant challenges to the reliability of existing communication systems. First, when power equipment is complicated and some power equipment does not meet related technical standards, after the power equipment is connected to a power network, many different types of noise are generated, such as: the noise environment of the power line communication is formed by the noise and background noise, and is completely different from the noise environment under the traditional wireless communication channel condition, so that the noise problem in the power line communication system is difficult to solve by the traditional noise modeling algorithm, the communication signal processing algorithm and the like, and the reliability of the power line carrier communication is poor. In addition, power line carrier communication is based on power lines, and thus the network is limited in its scalability.
Disclosure of Invention
In order to overcome the defects of the prior art, embodiments of the present invention provide a signal transmission method, a receiver, a transmitter, and a communication apparatus.
In order to achieve the above object, a first aspect of the present invention provides a signal transmission method applied to a receiving end, the signal transmission method including:
receiving a first path of signal of a first communication channel and a second path of signal of a second communication channel, wherein the first path of signal and the second path of signal comprise the same data information;
combining the first path of signal and the second path of signal into a third signal, wherein the signal-to-noise ratio of the third signal is the sum of the signal-to-noise ratio of the first path of signal and the signal-to-noise ratio of the second path of signal;
data information in the third signal is acquired.
In an embodiment of the invention, the first communication channel comprises a wireless communication channel and the second communication channel comprises a power line communication channel.
In an embodiment of the present invention, the signal transmission method further includes:
receiving a radio frequency signal transmitted by a wireless communication channel;
down-converting a Radio Frequency (RF) signal into an analog baseband signal by using a RF front end;
sampling an analog baseband signal by using an analog-to-digital converter to obtain a first time domain discrete signal;
transmitting the time-domain discrete signal to a first Orthogonal Frequency Division Multiplexing (OFDM) demodulator to demodulate the first time-domain discrete signal;
receiving a first frequency domain discrete signal demodulated by a first orthogonal frequency division multiplexing demodulator;
and obtaining a first path of signal according to the first frequency domain discrete signal.
In an embodiment of the present invention, the signal transmission method further includes:
receiving a power signal transmitted by a power line communication channel, wherein the power signal and the radio frequency signal comprise the same data information;
processing the power signal by using a power line communication decoupler to extract a broadband carrier signal, wherein the broadband carrier signal is an analog signal;
sampling the broadband carrier signal by using an analog-to-digital converter (ADC) to obtain a second time domain discrete signal;
sending the second time domain discrete signal to a second orthogonal frequency division multiplexing demodulator to demodulate the second time domain discrete signal;
receiving a second frequency domain discrete signal demodulated by a second orthogonal frequency division multiplexing demodulator;
and obtaining a second path of signal according to the second frequency domain discrete signal.
In the embodiment of the present invention, the demodulation parameters of the first ofdm demodulator and the second ofdm demodulator are the same, so that the first path of signal and the second path of signal include the same data information.
The second aspect of the present invention provides another signal transmission method, applied to a transmitting end, including:
separating the target signal into a radio frequency signal and a power signal, the radio frequency signal and the target signal comprising the same data information, the target signal being associated with a third signal;
transmitting the radio frequency signal to a receiving end by using a wireless communication mode;
and transmitting the power signal to a receiving end by using a power line carrier communication mode.
In the embodiment of the present invention, the sending the radio frequency signal to the receiving end by using the wireless communication mode includes:
performing up-conversion on the radio-frequency signal by using a radio-frequency front end;
and transmitting the radio frequency signal subjected to the up-conversion to a receiving end by utilizing a wireless communication mode.
A third aspect of the present invention provides a receiver configured to perform the signal transmission method described above.
A fourth aspect of the present invention provides a transmitter configured to perform the another signal transmission method described above.
A fifth aspect of the present invention provides a communication apparatus including the above receiver or the above transmitter.
A sixth aspect of the present invention provides a machine-readable storage medium storing instructions for causing a machine to perform the signal transmission method described above.
A seventh aspect of the invention provides a computer product comprising a computer program which, when executed by a processor, implements the signal transmission method described above.
In the above technical solution, the receiving end receives two independent communication channels transmitting signals carrying the same data information, that is, the target signal is divided into two signals containing the same information, wherein one signal is transmitted by using the first communication channel, and the other signal is transmitted by using the second communication channel. The method can overcome the respective defects of the first communication channel and the second communication channel, fully combines the respective communication advantages of the first communication channel and the second communication channel, fully integrates two different communication technologies related to the first communication channel and the second communication channel, forms a same target signal, respectively utilizes the communication modes of the two different channels, enables the target signal to be transmitted more reliably, and improves the reliability of a communication system by utilizing dual-mode communication.
For example, when the first communication channel is a wireless communication channel and the second communication channel is a power line communication channel, the signal transmission method provided by the embodiment of the invention can exert the advantage that power line communication can overcome signal attenuation caused by a building wall, and can also exert the advantages that wireless communication networking is easy and network expandability is good. The signal-to-noise ratio of the third signal is the sum of the signal-to-noise ratio of the first path of signal and the signal-to-noise ratio of the second path of signal, which means that the quality of the combined signal is superior to the quality of the signal transmitted by a single communication channel, so that a more reliable power communication network is constructed, and the power industry is better served.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
fig. 1 schematically shows a flow chart of a signal transmission method according to an embodiment of the invention;
FIG. 2 schematically illustrates a flow chart of another method of signal transmission according to an embodiment of the invention;
fig. 3 schematically shows a flow chart of signal transmission and processing according to an embodiment of the invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are referred to in the embodiments of the present application, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between the various embodiments can be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
Fig. 1 schematically shows a flow chart of a signal transmission method according to an embodiment of the invention. As shown in fig. 2, a signal transmission method is provided, which is applied to a receiving end and includes the following steps:
step 101, receiving a first path of signal of a first communication channel and a second path of signal of a second communication channel, wherein the first path of signal and the second path of signal comprise the same data information;
102, combining the first path of signal and the second path of signal into a third signal, wherein the signal-to-noise ratio of the third signal is the sum of the signal-to-noise ratio of the first path of signal and the signal-to-noise ratio of the second path of signal;
step 103, acquiring data information in the third signal.
In the above technical solution, the receiving end receives two independent communication channels transmitting signals carrying the same data information, that is, the target signal is divided into two signals containing the same information, wherein one signal is transmitted by using the first communication channel, and the other signal is transmitted by using the second communication channel. The method can overcome the respective defects of the first communication channel and the second communication channel, fully combines the respective communication advantages of the first communication channel and the second communication channel, fully integrates two different communication technologies related to the first communication channel and the second communication channel, forms a same target signal, respectively utilizes the communication modes of the two different channels, enables the target signal to be transmitted more reliably, and improves the reliability of a communication system by utilizing dual-mode communication.
For example, when the first communication channel is a wireless communication channel and the second communication channel is a power line communication channel, the signal transmission method provided by the embodiment of the invention can exert the advantage that power line communication can overcome signal attenuation caused by a building wall, and can also exert the advantages that wireless communication networking is easy and network expandability is good. The signal-to-noise ratio of the third signal is the sum of the signal-to-noise ratio of the first path of signal and the signal-to-noise ratio of the second path of signal, which means that the quality of the combined signal is superior to the quality of the signal transmitted by a single communication channel, so that a more reliable power communication network is constructed, and the power industry is better served.
The first communication channel may be a wireless communication channel, the second communication channel may be a power line communication channel, and the first communication channel and the second communication channel may also be other types of communication channels, which is not limited herein.
In an embodiment, the first communication channel comprises a wireless communication channel and the second communication channel comprises a powerline communication channel.
In one embodiment, the signal transmission method further includes:
receiving a radio frequency signal transmitted by a wireless communication channel;
down-converting the radio frequency signal into an analog baseband signal using the radio frequency front end 13;
sampling the analog baseband signal by using an analog-to-digital converter 14 to obtain a first time domain discrete signal;
transmitting the time domain discrete signal to the first orthogonal frequency division multiplexing demodulator 15 to demodulate the first time domain discrete signal;
receiving a first frequency domain discrete signal demodulated by the first ofdm demodulator 15;
and obtaining a first path of signal according to the first frequency domain discrete signal.
In one embodiment, the signal transmission method further includes:
receiving a power signal transmitted by a power line communication channel, wherein the power signal and the radio frequency signal comprise the same data information;
processing the power signal by using a power line communication decoupler to extract a broadband carrier signal, wherein the broadband carrier signal is an analog signal;
sampling the broadband carrier signal by using an analog-to-digital converter 14 to obtain a second time domain discrete signal;
sending the second time domain discrete signal to the second ofdm demodulator 16 to demodulate the second time domain discrete signal;
receiving a second frequency domain discrete signal demodulated by the second ofdm demodulator 16;
and obtaining a second path of signal according to the second frequency domain discrete signal.
In an embodiment, the demodulation parameters of the first ofdm demodulator 15 and the second ofdm demodulator 16 are the same, so that the first path signal and the second path signal include the same data information.
Fig. 2 schematically shows a flow chart of another signal transmission method according to an embodiment of the invention. As shown in fig. 2, another signal transmission method is provided, which is applied to a transmitting end and includes the following steps:
step 201, dividing a target signal into a radio frequency signal and a power signal, wherein the power signal, the radio frequency signal and the target signal comprise the same data information, and the target signal is associated with a third signal;
step 202, transmitting the radio frequency signal to a receiving end by using a wireless communication mode;
and step 203, transmitting the power signal to a receiving end by using a power line carrier communication mode.
In one embodiment, the transmitting the rf signal to the receiving end using wireless communication includes:
up-converting the radio frequency signal by using the radio frequency front end 13;
and transmitting the radio frequency signal subjected to the up-conversion to a receiving end by utilizing a wireless communication mode.
The following describes a signal transmission method according to an embodiment of the present invention.
The first communication channel is a wireless communication channel and the second communication channel is a power line communication channel. The power line carrier communication technology and the wireless communication technology are used as two alternative communication technologies for supporting the smart grid, and in the process of engineering application, the two communication technologies are integrated to form complementation, so that the advantages of the respective communication technologies are fully exerted, and a communication network with higher robustness is constructed.
The power line carrier communication is a communication mode using a power line as a channel, and is currently applied to a large-area centralized meter reading service in the power industry because the power line carrier communication has the advantages of low investment, short construction period, simple equipment, safe communication, good real-time performance and long distance, and can overcome the problem of great signal attenuation caused by building walls.
However, since power lines are designed primarily for power transmission, the characteristics of the resulting power line communication channel pose significant challenges to the reliability of existing communication systems. Power equipment is complicated, and some power equipment do not conform to relevant communication technology standard, and after the access power network, can produce many different types of noise, for example: the noise environment of the power line communication is formed by the noise and background noise, and is completely different from the noise environment under the traditional wireless communication channel condition, so that the problems in the power line communication system are difficult to solve by the traditional noise modeling algorithm, the communication signal processing algorithm and the like.
The problem of unreliable power line carrier communication exists, and especially under the condition of encountering random narrow-band pulse noise, meter reading failure caused by unreliable communication can be caused. In addition, power line carrier communication is based on power lines, and thus the network is limited in its scalability.
The wireless communication uses electromagnetic wave as carrier to transmit information, and the communication between the communication terminal and the network access station uses wireless air interface, so it has better network expansibility and easy networking. However, electromagnetic waves, especially high-frequency electromagnetic waves, are linear in the transmission process and cannot bypass large building walls, and the attenuation of a single-side wall to signals can reach 30dB or even higher. In the electric power industry, electric energy meters of home users in a community are usually placed in an electric meter room which is located inside a building, and most of the electric meter rooms are beside an internal elevator, and a transformer is placed in a basement. Therefore, it is difficult to acquire data information at locations such as cell rooms and transformers using the network of the network operator.
Therefore, in order to overcome the respective disadvantages of the power line carrier communication technology and the wireless communication technology and simultaneously exert the respective advantages of the power line carrier communication technology and the wireless communication technology, the embodiment of the invention fully integrates the two communication technologies to form a communication mode that the same signal respectively passes through two different channels, so that a more reliable power communication network is constructed and the power industry is better served.
The embodiment of the invention realizes the deep fusion of two communication technologies, can overcome respective defects, solves the problems of easy signal attenuation of a wireless network, difficult expansion of a wired network and the like, and improves the reliability of a communication system.
Using a single communication channel for signal transmission; the method uses dual-channel signal transmission, but two different communication channels do not realize deep technical fusion, and basically independently complete the physical layer or select one path of signal as a signal to be actually processed in a signal selection mode, the signal-to-noise ratio of the transmission signal is only the signal-to-noise ratio of one path of signal, and the communication quality of the transmission signal is the communication quality of one path of signal, so that the performance improvement of a receiver brought by the organic fusion of the different channels is not fully exploited; compared with the two modes, the signal transmission method provided by the embodiment of the invention has better reliability and effectiveness.
The embodiment of the invention overcomes the defects of the two modes, sufficiently and deeply integrates the two paths of signals, and improves the performance of the dual-mode receiver by using an algorithm and system thinking. Fig. 3 schematically shows a flow chart of signal transmission and processing according to an embodiment of the present invention, and a system convergence scheme provided by the embodiment of the present invention can be seen from fig. 3, where the wireless communication and the power line carrier communication both use the same OFDM parameters, and two independent OFDM demodulators (i.e., the first OFDM demodulator 15 and the second OFDM demodulator 16) are used at the receiver end, and the same data symbol is carried on the subcarrier corresponding to each pair of wireless communication and power line carrier communication.
Fig. 3 schematically shows a flow chart of signal transmission and processing according to an embodiment of the invention, see fig. 3. At a sending end, after passing through a digital-to-analog converter (DAC) 12, a path of signal (a target signal) is divided into two paths of signals containing the same information, wherein one path of signal is sent to a radio frequency front end 13 for up-conversion, and the signal is finally sent out in a wireless mode; and the other signal is sent to the power line carrier coupler, and the signal is transmitted through a power line channel.
At the receiving end, for the wireless communication channel, the radio frequency front end 13 down-converts the radio frequency signal received from the air interface into an analog baseband signal, samples the analog baseband signal by using the analog-to-digital converter 14 to obtain a first time domain discrete signal, sends the sampled first time domain discrete signal to the first orthogonal frequency division multiplexing demodulator 15, and the OFDM demodulator 15 outputs a first frequency domain discrete signal. X for first frequency domain discrete signalW(k) To indicate.
At a receiving end, for a power line communication channel, a broadband carrier signal is extracted by using a power line communication decoupler, and the extracted analog signal is sent to a receiverThe second analog-to-digital converter 16 performs digital quantization sampling, and sends the quantized second time domain discrete signal to the second OFDM demodulator 16, and the OFDM demodulator 16 outputs the second frequency domain discrete signal. X for second frequency domain discrete signalP(k) To indicate.
For convenience of description of the embodiments of the present invention, two definitions are made:
definition 1: the output signal corresponding to the wireless communication link is represented as:
the corner mark W indicates that the communication link is a wireless communication link, l indicates the ith OFDM symbol block, k indicates the kth subcarrier,indicating the frequency domain channel coefficient corresponding to the kth sub-carrier of the ith OFDM symbol block,representing the frequency domain data symbols carried on the kth subcarrier of the ith OFDM symbol block,representing the additional frequency domain noise on the kth subcarrier of the ith OFDM symbol block.
Definition 2: the output signal corresponding to the power line carrier communication is expressed as:
the corner mark P indicates that the communication link is a power line carrier communication link, l indicates the ith OFDM symbol block, k indicates the kth subcarrier,indicating the frequency domain channel coefficient corresponding to the kth sub-carrier of the ith OFDM symbol block,representing the frequency domain data symbols carried on the kth subcarrier of the ith OFDM symbol block,representing the additional frequency domain noise on the kth subcarrier of the ith OFDM symbol block.
The receiving end receives signals carrying the same information from two independent communication channels (wireless communication channel and power line communication channel), so thatThe diversity Combining can improve the reliability of a communication system, and Maximum Ratio Combining (MRC) is a better choice in the diversity Combining technology, and can obtain the best performance relative to selection Combining and equal gain Combining, thereby bringing better error rate characteristics. The implementation of maximal ratio combining is that 2 different signals of diversity are multiplied by a different coefficient, and the specific expression about maximal ratio combining is as follows:
wherein the content of the first and second substances,nPrepresenting power line carrier communication noiseVariance of nWRepresenting wireless communication link noiseThe variance of (c). It follows that the instantaneous signal-to-noise ratio (SNR) of the third signal on the kth sub-carrier channel can be expressed as:
as can be obtained from the equation (4), the signal-to-noise ratio after the maximal ratio combining algorithm is the sum of the signal-to-noise ratio of the power line carrier communication and the signal-to-noise ratio of the wireless communication, that is, the signal-to-noise ratio of the third signal is the sum of the signal-to-noise ratio of the first signal and the signal-to-noise ratio of the second signal, that is, the signal quality after the maximal ratio combining is superior to the signal quality of the power line carrier communication alone. Compared with the data information of a certain path of signal in the first path of signal and the second path of signal, the data information in the third signal is more reliable and more effective.
When the wireless communication link quality is poor and the contribution provided to the system is small, the link quality of the embodiment of the invention is slightly higher than that of the power line carrier communication alone. In practical cases, SNRW(k) Not less than 0, so SNRMRC(k)≥SNRP(k) That is, it is shown that compared with the single power line broadband carrier communication, the communication performance can be improved by using the maximum ratio combining algorithm. In one embodiment, a 2-3dB performance boost may be obtained.
The dual-mode communication of the embodiment of the invention comprises a power line communication network which is constructed by taking a communication technical specification as a standard, has high bandwidth, high reliability, low time delay and low cost, and supports various application scenes such as remote automatic meter reading and power distribution station detection. The dual mode integrates the wireless communication special frequency points (230MHz and 470MHz) owned by the power grid company. The dual-mode (power line broadband carrier communication and wireless communication) receiver provided by the embodiment of the invention improves the reliability of a communication system by utilizing a maximum ratio combining algorithm. The embodiment of the invention provides an additional communication channel for the traditional power line carrier communication, and provides a new possibility for wireless communication once the power line carrier communication is blocked.
An embodiment of the present invention provides a receiver configured to perform the signal transmission method in any one of the above embodiments.
In particular, the receiver may be configured to:
receiving a first path of signal of a first communication channel and a second path of signal of a second communication channel, wherein the first path of signal and the second path of signal comprise the same data information;
combining the first path of signal and the second path of signal into a third signal, wherein the signal-to-noise ratio of the third signal is the sum of the signal-to-noise ratio of the first path of signal and the signal-to-noise ratio of the second path of signal;
data information in the third signal is acquired.
In an embodiment of the invention, the receiver is configured to: the first communication channel comprises a wireless communication channel and the second communication channel comprises a powerline communication channel.
In an embodiment of the invention, the receiver is further configured to:
receiving a radio frequency signal transmitted by a wireless communication channel;
down-converting the radio frequency signal into an analog baseband signal using the radio frequency front end 13;
sampling the analog baseband signal by using an analog-to-digital converter 14 to obtain a first time domain discrete signal;
transmitting the time domain discrete signal to the first orthogonal frequency division multiplexing demodulator 15 to demodulate the first time domain discrete signal;
receiving a first frequency domain discrete signal demodulated by the first ofdm demodulator 15;
and obtaining a first path of signal according to the first frequency domain discrete signal.
In an embodiment of the invention, the receiver is further configured to:
receiving a power signal transmitted by a power line communication channel, wherein the power signal and the radio frequency signal comprise the same data information;
processing the power signal by using a power line communication decoupler to extract a broadband carrier signal, wherein the broadband carrier signal is an analog signal;
sampling the broadband carrier signal by using an analog-to-digital converter 14 to obtain a second time domain discrete signal;
sending the second time domain discrete signal to the second ofdm demodulator 16 to demodulate the second time domain discrete signal;
receiving a second frequency domain discrete signal demodulated by the second ofdm demodulator 16;
and obtaining a second path of signal according to the second frequency domain discrete signal.
In an embodiment of the invention, the receiver is configured to: the demodulation parameters of the first ofdm demodulator 15 and the second ofdm demodulator 16 are the same, so that the first path signal and the second path signal include the same data information.
An embodiment of the present invention provides a transmitter configured to perform another signal transmission method in any one of the above embodiments.
Specifically, the transmitter is configured to:
separating the target signal into a radio frequency signal and a power signal, the radio frequency signal and the target signal comprising the same data information, the target signal being associated with a third signal;
transmitting the radio frequency signal to a receiving end by using a wireless communication mode;
and transmitting the power signal to a receiving end by using a power line carrier communication mode.
In an embodiment of the invention, the transmitter is configured to:
utilizing a wireless communication mode to send a radio frequency signal to a receiving end comprises:
up-converting the radio frequency signal by using the radio frequency front end 13;
and transmitting the radio frequency signal subjected to the up-conversion to a receiving end by utilizing a wireless communication mode.
An embodiment of the present invention provides a communication apparatus, including the above receiver or the above transmitter.
The embodiment of the invention provides a machine-readable storage medium, which stores instructions for causing a machine to execute the signal transmission method.
A seventh aspect of the invention provides a computer product comprising a computer program which, when executed by a processor, implements the signal transmission method described above.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.