阅读说明：本技术 散射通信系统的通信方法 (Communication method of scattering communication system ) 是由 徐信 王伟 张涛 于 2021-06-30 设计创作，主要内容包括：本发明提供了一种散射通信系统的通信方法,该方法应用于一种散射通信系统,该系统包括发射端和接收端,发射端和接收端的通信频带被预划分为N个信道；该方法包括：发射端通过N个信道分别向接收端发送信道探测信号,接收端根据从每个信道接收到的信道探测信号,获取N个信道的信道质量并向发射端发送信令反馈信号,发射端根据信令反馈信号获取目标信道和目标信道对应的调制编码方式,其中,目标信道是N个信道中信道质量最高的信道；发射端根据目标信道对应的调制编码方式,对业务数据进行处理,得到业务通信信号,通过目标信道将业务通信信号发送至接收端。发射端和接收端可以是单天线发射端和单天线接收端,提高了散射通信系统的便携性。(The invention provides a communication method of a scattering communication system, which is applied to the scattering communication system, wherein the system comprises a transmitting end and a receiving end, and communication frequency bands of the transmitting end and the receiving end are pre-divided into N channels; the method comprises the following steps: the method comprises the steps that a transmitting end sends channel detection signals to a receiving end through N channels respectively, the receiving end obtains channel quality of the N channels according to the channel detection signals received from each channel and sends signaling feedback signals to the transmitting end, and the transmitting end obtains a target channel and a modulation coding mode corresponding to the target channel according to the signaling feedback signals, wherein the target channel is the channel with the highest channel quality in the N channels; and the transmitting terminal processes the service data according to the modulation coding mode corresponding to the target channel to obtain a service communication signal, and the service communication signal is transmitted to the receiving terminal through the target channel. The transmitting end and the receiving end can be a single-antenna transmitting end and a single-antenna receiving end, and the portability of the scattering communication system is improved.)

1. A communication method of a scattering communication system is characterized in that the method is applied to a transmitting end of the scattering communication system, the scattering communication system also comprises a receiving end, and communication frequency bands of the transmitting end and the receiving end are pre-divided into N channels; the method comprises the following steps:

respectively sending channel detection signals to the receiving end through the N channels, so that the receiving end obtains the channel quality of the N channels according to the channel detection signals received from each channel;

receiving a signaling feedback signal sent by the receiving end, and acquiring a target channel and a modulation coding mode corresponding to the target channel according to the signaling feedback signal, wherein the target channel is a channel with the highest channel quality in the N channels;

and processing service data according to the modulation coding mode corresponding to the target channel to obtain a service communication signal, and sending the service communication signal to the receiving end through the target channel.

2. The method of claim 1, wherein the transmitting the channel sounding signals to the receiving end through the N channels respectively comprises:

and after the channel detection signals are subjected to shaping filtering and up-conversion processing, the channel detection signals are respectively sent to the receiving end through the N channels.

3. The method of claim 1, wherein the channel sounding signal is composed of a Constant Amplitude Zero Autocorrelation (CAZAC) sequence, wherein the channel sounding signal, the signaling feedback signal, and the traffic communication signal have the same symbol rate, and wherein the channel sounding signal, the signaling feedback signal, and the traffic communication signal are shaped in the same manner.

4. The method of claim 1, wherein the obtaining a target channel and a modulation and coding scheme corresponding to the target channel according to the signaling feedback signal comprises:

and synchronizing the self receiving frequency to the transmitting frequency through down-conversion, and demodulating, despreading and decoding the signaling feedback signal to obtain the target channel and a modulation coding mode corresponding to the target channel.

5. The method of claim 1, wherein the processing the service data according to the modulation and coding scheme corresponding to the target channel comprises:

and carrying out channel coding, channel interleaving, modulation and up-conversion processing on the service data according to the modulation coding mode corresponding to the target channel.

6. The method according to any one of claims 1 to 5, wherein a shortest frequency switching time corresponding to a frequency converter of the transmitting end is a first duration, the signal duration of the channel sounding signal is a second duration, and the second duration is greater than or equal to the first duration.

7. A communication method of a scattering communication system is characterized in that the method is applied to a receiving end of the scattering communication system, the scattering communication system also comprises a transmitting end, and communication frequency bands of the receiving end and the transmitting end are pre-divided into N channels; the method comprises the following steps:

respectively receiving channel detection signals sent by a transmitting terminal from the N channels;

sorting the channel quality of the N channels according to the channel detection signals received from each channel;

selecting a channel with the best channel quality as a target channel according to the sorting result, and obtaining a modulation coding mode corresponding to the target channel according to the channel quality of the target channel;

and sending a signaling feedback signal to the transmitting end, wherein the signaling feedback signal comprises the identification information of the target channel and the modulation and coding mode corresponding to the target channel, so that the transmitting end processes service data according to the modulation and coding mode corresponding to the target channel to obtain a service communication signal, and the service communication signal is sent to the receiving end through the target channel.

8. The method according to claim 7, wherein said receiving the channel sounding signals transmitted from the transmitting end from the N channels respectively comprises:

synchronizing the receiving frequency of the receiving terminal to the transmitting frequency through down-conversion, respectively receiving the channel detection signals sent by the transmitting terminal from the N channels, and performing matched filtering processing;

the sorting the channel qualities of the N channels according to the channel sounding signal received from each channel includes:

and acquiring the signal-to-noise ratio and/or the bit error rate of each channel according to the channel detection signals received from each channel, and sequencing the channel quality of the N channels from high to low according to the signal-to-noise ratio and/or the bit error rate of each channel.

9. The method of claim 7, wherein the sending the signaling feedback signal to the transmitting end comprises:

and after carrying out signaling coding, spreading, modulation and up-conversion processing on the identification information of the target channel and the modulation coding mode corresponding to the target channel, obtaining a signaling feedback signal and sending the signaling feedback signal to the transmitting terminal.

10. The method according to claim 7, wherein a time when the transmitting end sends the channel sounding signal to the receiving end is a first time, a time when the receiving end sends the signaling feedback signal to the transmitting end is a second time, and a time interval between the second time and the first time is a preset time interval.

Technical Field

The invention belongs to the technical field of scattering communication, and particularly relates to a communication method of a scattering communication system.

Background

Tropospheric scatter communication is a beyond-the-horizon communication that is achieved by utilizing the reflection and scattering effects of atmospheric inhomogeneities in the troposphere on electromagnetic waves. The troposphere scattering communication has the characteristics of long single-hop communication distance, strong obstacle crossing capability, high reliability, good nuclear explosion resistance and interception resistance and the like, and is an important military and civil wireless communication means.

The tropospheric scatter channel has a large path loss and, in addition, there is severe time-varying fading due to scatterer motion and multipath propagation. To solve the problem of channel fading, the prior art generally adopts a space diversity-based adaptive frequency-selective scattering communication method. However, the method depends on a multi-antenna scattering communication system, so that the equipment is large, the portability is poor, and the cost is high.

Disclosure of Invention

In view of the above, the present invention provides a communication method of a scatterometry system, which can improve the device portability of the scatterometry system.

A first aspect of an embodiment of the present invention provides a communication method for a scatter communication system, where the method is applied to a transmitting end of the scatter communication system, the scatter communication system further includes a receiving end, and communication frequency bands of the transmitting end and the receiving end are pre-divided into N channels; the method comprises the following steps:

respectively sending channel detection signals to the receiving end through the N channels, so that the receiving end obtains the channel quality of the N channels according to the channel detection signals received from each channel;

receiving a signaling feedback signal sent by the receiving end, and acquiring a target channel and a modulation coding mode corresponding to the target channel according to the signaling feedback signal, wherein the target channel is a channel with the highest channel quality in the N channels;

and processing service data according to the modulation coding mode corresponding to the target channel to obtain a service communication signal, and sending the service communication signal to the receiving end through the target channel.

In a possible implementation manner, the sending the channel sounding signals to the receiving end through the N channels respectively includes:

and after the channel detection signals are subjected to shaping filtering and up-conversion processing, the channel detection signals are respectively sent to the receiving end through the N channels.

In a possible implementation manner, the channel sounding signal is composed of a constant-envelope zero-autocorrelation CAZAC sequence, symbol rates of the channel sounding signal, the signaling feedback signal, and the traffic communication signal are the same, and shaping manners of the channel sounding signal, the signaling feedback signal, and the traffic communication signal are the same.

In a possible implementation manner, the obtaining a target channel and a modulation and coding scheme corresponding to the target channel according to the signaling feedback signal includes:

and synchronizing the self receiving frequency to the transmitting frequency through down-conversion, and demodulating, despreading and decoding the signaling feedback signal to obtain the target channel and a modulation coding mode corresponding to the target channel.

In a possible implementation manner, the processing service data according to the modulation and coding scheme corresponding to the target channel includes:

and carrying out channel coding, channel interleaving, modulation and up-conversion processing on the service data according to the modulation coding mode corresponding to the target channel.

In a possible implementation manner, the shortest frequency switching time corresponding to the frequency converter of the transmitting end is a first time length, the signal duration of the channel detection signal is a second time length, and the second time length is greater than or equal to the first time length.

A second aspect of the embodiments of the present invention provides a communication method for a scatter communication system, where the method is applied to a receiving end of the scatter communication system, the scatter communication system further includes a transmitting end, and communication frequency bands of the receiving end and the transmitting end are pre-divided into N channels; the method comprises the following steps:

respectively receiving channel detection signals sent by a transmitting terminal from the N channels;

sorting the channel quality of the N channels according to the channel detection signals received from each channel;

selecting a channel with the best channel quality as a target channel according to the sorting result, and obtaining a modulation coding mode corresponding to the target channel according to the channel quality of the target channel;

and sending a signaling feedback signal to the transmitting end, wherein the signaling feedback signal comprises the identification information of the target channel and the modulation and coding mode corresponding to the target channel, so that the transmitting end processes service data according to the modulation and coding mode corresponding to the target channel to obtain a service communication signal, and the service communication signal is sent to the receiving end through the target channel.

In a possible implementation manner, the receiving, from the N channels, the channel sounding signals sent by the transmitting end respectively includes:

synchronizing the receiving frequency of the receiving terminal to the transmitting frequency through down-conversion, respectively receiving the channel detection signals sent by the transmitting terminal from the N channels, and performing matched filtering processing;

the sorting the channel qualities of the N channels according to the channel sounding signal received from each channel includes:

and acquiring the signal-to-noise ratio and/or the bit error rate of each channel according to the channel detection signals received from each channel, and sequencing the channel quality of the N channels from high to low according to the signal-to-noise ratio and/or the bit error rate of each channel.

In a possible implementation manner, the sending a signaling feedback signal to the transmitting end includes:

and after carrying out signaling coding, spreading, modulation and up-conversion processing on the identification information of the target channel and the modulation coding mode corresponding to the target channel, obtaining a signaling feedback signal and sending the signaling feedback signal to the transmitting terminal.

In a possible implementation manner, a time when the transmitting end sends the channel sounding signal to the receiving end is a first time, a time when the receiving end sends the signaling feedback signal to the transmitting end is a second time, and a time interval between the second time and the first time is a preset time interval.

The embodiment of the invention provides a communication method of a scattering communication system, which comprises the steps that communication frequency bands of a transmitting end and a receiving end are pre-divided into N channels, and the transmitting end respectively sends channel detection signals to the receiving end through the N channels; the receiving end acquires the channel quality of N channels according to the channel detection signals received from each channel and sends signaling feedback signals to the transmitting end; the transmitting terminal acquires a target channel and a modulation coding mode corresponding to the target channel according to the signaling feedback signal, wherein the target channel is the channel with the highest channel quality in the N channels; and processing the service data according to the modulation coding mode corresponding to the target channel to obtain a service communication signal, and sending the service communication signal to a receiving end through the target channel, namely the channel with the highest channel quality in the N channels. According to the communication method of the scattering communication system provided by the embodiment of the invention, the transmitting end and the receiving end can be a single-antenna transmitting end and a single-antenna receiving end, so that the portability of the scattering communication system is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a flowchart of an implementation of a communication method of a scatter communication system according to an embodiment of the present invention;

fig. 2 is a flowchart of an implementation of a communication method of another scatterometry communication system according to an embodiment of the present invention;

fig. 3 is a flowchart of an implementation of a communication method of another scatterometry communication system according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a transmitting end device or a receiving end device according to an embodiment of the present invention.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following description is made by way of specific embodiments with reference to the accompanying drawings.

Referring to fig. 1, it shows a flowchart of an implementation of a communication method of a scatterometry system, where the method is applied to a transmitting end of the scatterometry system, the scatterometry system further includes a receiving end, communication bands of the transmitting end and the receiving end are pre-divided into N channels, optionally, both the transmitting end and the receiving end are single-antenna devices, and details are as follows:

s101, respectively sending channel detection signals to a receiving end through N channels, so that the receiving end obtains the channel quality of the N channels according to the channel detection signals received from each channel.

Optionally, the transmitting end performs shaping filtering and up-conversion processing on the channel detection signal, and then sends the channel detection signal to the receiving end through the N channels.

Optionally, the detection signal that is shaped and filtered by the transmitting end is a baseband channel detection signal.

Optionally, the channel spacing of the N channels is greater than the channel coherence bandwidth. For example, the communication bands of the transmitting end and the receiving end are pre-divided into 8 channels.

The receiving end receives the channel detection signal from each channel to obtain the channel quality of N channels.

S102, receiving a signaling feedback signal sent by a receiving end, and acquiring a target channel and a modulation coding mode corresponding to the target channel according to the signaling feedback signal, wherein the target channel is a channel with the highest channel quality in the N channels.

And the transmitting terminal synchronizes the self receiving frequency to the transmitting frequency through down-conversion, and demodulates, despreads and decodes the signaling feedback signal to obtain the target channel and a modulation coding mode corresponding to the target channel.

And S103, processing the service data according to the modulation coding mode corresponding to the target channel to obtain a service communication signal, and sending the service communication signal to a receiving end through the target channel.

Optionally, the process of processing the service data by the transmitting end includes: and carrying out channel coding, channel interleaving, modulation and up-conversion processing on the service data according to a modulation coding mode corresponding to the target channel.

By the method, the transmitting terminal obtains the channel with the best channel quality in the N channels and the modulation coding mode adaptive to the channel. And processing the service data through a modulation coding mode corresponding to the channel with the best channel quality to obtain a service communication signal, and sending the service communication signal to a receiving end through the channel with the best channel quality.

Optionally, the channel detection signal is composed of a constant envelope zero autocorrelation CAZAC sequence, the CAZAC sequence has a zero autocorrelation characteristic, detection of the channel is more sufficient, quality evaluation is more accurate, and frequency selection performance is better, so that the application scenarios of the method provided by the embodiment of the present application are wider.

Alternatively, the channel sounding signal may use a Frank-Zadoff-Chu sequence among CAZAC sequences.

Optionally, the symbol rates of the channel sounding signal, the signaling feedback signal and the service communication signal are the same, and the forming manners of the channel sounding signal, the signaling feedback signal and the service communication signal are the same. In this way, the channel condition detected by the probe signal is more consistent with the channel condition when the traffic communication signal is transmitted.

Optionally, the shortest frequency switching time corresponding to the frequency converter of the transmitting end is a first duration, the signal duration of the channel detection signal is a second duration, and the second duration is greater than or equal to the first duration.

If the second duration is less than the first duration, the frequency converter cannot support the second duration, and signal distortion is caused.

For example, the frequency converter at the transmitting end is a frequency converter supporting 10000 hops per second, and the duration of the channel sounding signal is not less than 100 microseconds.

Therefore, the invention can keep the service communication working at the communication channel with the best channel quality by detecting N channels of the transmitting end and the receiving end in real time and feeding back signaling, thereby improving the power utilization rate and having higher data transmission rate.

Fig. 2 shows a flowchart of an implementation of a communication method of a scatterometry communication system according to an embodiment of the present invention, where the method is applied to a receiving end of the scatterometry communication system, the scatterometry communication system further includes a transmitting end, communication bands of the receiving end and the transmitting end are pre-divided into N channels, and optionally, the transmitting end and the receiving end are both single-antenna devices, which is detailed as follows:

s201, receiving channel sounding signals sent by a transmitting end from N channels, respectively.

Optionally, the receiving end synchronizes its receiving frequency to the transmitting frequency through down-conversion, and receives the channel sounding signals sent by the transmitting end from the N channels respectively and performs matched filtering processing.

S202, sorting the channel qualities of the N channels according to the channel sounding signals received from each channel.

Optionally, the signal-to-noise ratio and/or the bit error rate of each channel are obtained according to the channel sounding signal received from each channel, and the channel qualities of the N channels are sorted from high to low according to the signal-to-noise ratio and/or the bit error rate of each channel.

S203, selecting the channel with the best channel quality as a target channel according to the sorting result, and obtaining a modulation coding mode corresponding to the target channel according to the channel quality of the target channel.

For example, if the receiving end ranks the channel qualities of the N channels according to the signal-to-noise ratio of each channel, the channel with the highest signal-to-noise ratio is the target channel, and the modulation and coding scheme corresponding to the signal-to-noise ratio of the target channel is the modulation and coding scheme corresponding to the target channel.

S204, sending a signaling feedback signal to the transmitting end, wherein the signaling feedback signal comprises the identification information of the target channel and the modulation and coding mode corresponding to the target channel, so that the transmitting end processes the service data according to the modulation and coding mode corresponding to the target channel to obtain a service communication signal, and sending the service communication signal to the receiving end through the target channel.

Optionally, the receiving end performs signaling coding, spreading, modulating, and up-converting on the identification information of the target channel and the modulation coding mode corresponding to the target channel to obtain a signaling feedback signal, and sends the signaling feedback signal to the transmitting end.

Optionally, the time when the transmitting end sends the channel sounding signal to the receiving end is a first time, the time when the receiving end sends the signaling feedback signal to the transmitting end is a second time, and a time interval between the second time and the first time is a preset time interval.

One communication process of the communication method according to the embodiment of the present application is one frequency selection frame, and optionally, the second time is delayed by half of the frequency selection frame compared with the first time. For example, if a frequency-selective frame is 5ms, the second time is 2.5ms later than the first time.

By the method, the transmitting end can obtain the modulation coding mode corresponding to the target channel before transmitting the service data.

Further, after receiving the service communication signal, the receiving end demodulates the service data through down-conversion, demodulation, de-channel interleaving and channel decoding.

Therefore, the invention can keep the service communication working at the communication channel with the best channel quality by detecting N channels of the transmitting end and the receiving end in real time and feeding back signaling, thereby improving the power utilization rate and having higher data transmission rate.

Fig. 3 shows a flowchart of an implementation of a communication method of a scatterometry communication system according to an embodiment of the present invention, where the method is applied to a scatterometry communication system, where the scatterometry communication system includes a transmitting end and a receiving end, communication bands of the transmitting end and the receiving end are pre-divided into N channels, and optionally, both the transmitting end and the receiving end are single-antenna devices, which is detailed as follows:

s301, the transmitting terminal sends channel detection signals to the receiving terminal through N channels respectively.

S302, the receiving end sequences the channel quality of N channels according to the channel detection signal received from each channel.

And S303, the receiving end selects the channel with the best channel quality as a target channel according to the sorting result, and obtains a modulation coding mode corresponding to the target channel according to the channel quality of the target channel.

S304, the receiving end sends a signaling feedback signal to the transmitting end, wherein the signaling feedback signal comprises the identification information of the target channel and the modulation coding mode corresponding to the target channel.

S305, the transmitting terminal receives the signaling feedback signal and acquires a target channel and a modulation coding mode corresponding to the target channel according to the signaling feedback signal.

S306, the transmitting terminal processes the service data according to the modulation coding mode corresponding to the target channel to obtain a service communication signal, and the service communication signal is sent to the receiving terminal through the target channel.

And S307, the receiving end receives the service communication signal and analyzes the service communication signal to obtain service data.

Therefore, the invention can keep the service communication working at the communication channel with the best channel quality by detecting N channels of the transmitting end and the receiving end in real time and feeding back signaling, thereby improving the power utilization rate and having higher data transmission rate.

Optionally, steps S301 to S307 may be regarded as a frequency selection process, and after step S307 is completed, the process loops to step S301 to perform the next frequency selection process until the transmitting end and the receiving end finish working.

It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

Fig. 4 shows a schematic structural diagram of a transmitting-end device provided by an embodiment of the present invention, and for convenience of description, only the parts related to the embodiment of the present invention are shown, and detailed descriptions are as follows: as shown in fig. 4, the transmitting end device includes a data processing module 41 and a signal transceiving module 42, optionally, the signal transceiving module 42 is formed by a single antenna, the transmitting end device communicates with a receiving end device in a scattering communication system, a communication frequency band between the transmitting end device and the receiving end device is pre-divided into N channels, and the transmitting end device is configured to:

the signal transceiver module 42 sends channel probing signals to the receiving end device through the N channels, respectively, so that the receiving end device obtains channel qualities of the N channels according to the channel probing signals received from each channel;

the data processing transceiver module receives a signaling feedback signal sent by the receiving end device, and the data processing module 41 acquires a target channel and a modulation and coding mode corresponding to the target channel according to the signaling feedback signal, wherein the target channel is a channel with the highest channel quality among the N channels;

the data processing module 41 processes the service data according to the modulation and coding mode corresponding to the target channel to obtain a service communication signal, and the data processing transceiver module transmits the service communication signal to the receiving end device through the target channel.

Optionally, after the data processing module 41 performs shaping filtering and up-conversion processing on the channel detection signal, the data processing transceiver module sends the channel detection signal to the receiving end device through the N channels.

Optionally, the channel sounding signal is formed by a constant envelope zero autocorrelation CAZAC sequence, symbol rates of the channel sounding signal, the signaling feedback signal, and the service communication signal are the same, and forming manners of the channel sounding signal, the signaling feedback signal, and the service communication signal are the same.

Optionally, the signal processing module synchronizes its receiving frequency to the transmitting frequency through down-conversion, and demodulates, despreads and decodes the signaling feedback signal to obtain the target channel and the modulation and coding mode corresponding to the target channel.

Optionally, the data processing module 41 performs channel coding, channel interleaving, modulation, and up-conversion processing on the service data according to the modulation coding mode corresponding to the target channel.

Optionally, the transmitting end device includes a frequency converter, the shortest frequency switching time corresponding to the frequency converter of the transmitting end device is a first duration, the signal duration of the channel detection signal is a second duration, and the second duration is greater than or equal to the first duration.

Therefore, the invention can keep the service communication working in the communication channel with the best channel quality by detecting and feeding back the signaling in real time for the N channels of the transmitting terminal equipment and the receiving terminal equipment, thereby improving the power utilization rate and having higher data transmission rate.

Fig. 4 may also be a schematic structural diagram of a receiving end device provided in the embodiment of the present invention, and for convenience of description, only the parts related to the embodiment of the present invention are shown, and the details are as follows: as shown in fig. 4, the receiving end device includes a data processing module 41 and a signal transceiving module 42, optionally, the signal transceiving module 42 is formed by a single antenna, the receiving end device communicates with a transmitting end device in a scattering communication system, a communication frequency band between the receiving end device and the transmitting end device is pre-divided into N channels, and the receiving end device is configured to:

the signal transceiver module 42 receives the channel sounding signals sent by the transmitting terminal from the N channels respectively;

the data processing module 41 ranks the channel qualities of the N channels according to the channel sounding signal received from each channel;

the data processing module 41 selects a channel with the best channel quality as a target channel according to the sorting result, and obtains a modulation coding mode corresponding to the target channel according to the channel quality of the target channel;

the signal transceiver module 42 sends a signaling feedback signal to the transmitting end device, where the signaling feedback signal includes identification information of the target channel and a modulation and coding scheme corresponding to the target channel, so that the transmitting end device processes the service data according to the modulation and coding scheme corresponding to the target channel to obtain a service communication signal, and sends the service communication signal to the receiving end through the target channel.

Optionally, the data processing module 41 synchronizes its receiving frequency to the transmitting frequency through down-conversion, receives the channel detection signals sent by the transmitting end device from the N channels, and performs matched filtering processing;

optionally, the data processing module 41 obtains the signal-to-noise ratio and/or the bit error rate of each channel according to the channel sounding signal received from each channel, and sorts the channel quality of the N channels according to the order from high to low according to the signal-to-noise ratio and/or the bit error rate of each channel.

Optionally, the data processing module 41 performs signaling coding, spreading, modulation, and up-conversion on the identification information of the target channel and the modulation coding mode corresponding to the target channel to obtain a signaling feedback signal, and sends the signaling feedback signal to the transmitting end device through the signal transceiving module 42.

Optionally, the time when the transmitting end device sends the channel detection signal to the receiving end device is a first time, the time when the receiving end device sends the signaling feedback signal to the transmitting end device is a second time, and a time interval between the second time and the first time is a preset time interval.

Therefore, the invention can keep the service communication working in the communication channel with the best channel quality by detecting and feeding back the signaling in real time for the N channels of the transmitting terminal equipment and the receiving terminal equipment, thereby improving the power utilization rate and having higher data transmission rate.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.