阅读说明：本技术 基于射频电缆的多频率信号通信传输系统及方法 (Multi-frequency signal communication transmission system and method based on radio frequency cable ) 是由 李宗霖 冯霄鹏 任永学 袁夕征 何志国 赵伟涛 王娟 刘亭 徐明慧 李威威 庞晓 于 2021-08-12 设计创作，主要内容包括：本发明公开了一种基于射频电缆的多频率信号通信传输系统及方法,包括发送端、传输通道和接收端；发送端包括无线通信模块和合路模块,用于形成N路频率互不相同的载波信号,并合并为一路载波信号输出；传输通道为一条射频电缆,用于将发送端输出的一路载波信号传输到接收端；接收端包括频率转换模块和输出模块,用于将接收到的一路载波信号转换为N路多码流同频载波信号,再合并并进行输出。本发明优点在于无线通信模块将N个载波信号从多个端口输出,经过合路后,通过一个传输通道传输到接收端,经过一次频率转换模块,即可形成MIMO信号,极大地降低了设备成本、功耗和开发建设难度,提升了信号信噪比和效率。(The invention discloses a multi-frequency signal communication transmission system and method based on a radio frequency cable, which comprises a sending end, a transmission channel and a receiving end, wherein the sending end is used for sending a multi-frequency signal to the receiving end; the sending end comprises a wireless communication module and a combining module, and is used for forming N paths of carrier signals with different frequencies and combining the N paths of carrier signals into one path of carrier signal to be output; the transmission channel is a radio frequency cable and is used for transmitting one path of carrier signals output by the transmitting end to the receiving end; the receiving end comprises a frequency conversion module and an output module, and is used for converting one path of received carrier signals into N paths of multi-code stream same-frequency carrier signals, and then combining and outputting the N paths of multi-code stream same-frequency carrier signals. The invention has the advantages that the wireless communication module outputs N carrier signals from a plurality of ports, the N carrier signals are combined and then transmitted to a receiving end through a transmission channel, and the MIMO signal can be formed through a frequency conversion module, thereby greatly reducing the equipment cost, the power consumption and the development and construction difficulty, and improving the signal-to-noise ratio and the efficiency of the signal.)

1. A multiple frequency signal communication transmission system based on a radio frequency cable, characterized by: the system comprises a sending end, a transmission channel and a receiving end;

the transmitting end comprises a wireless communication module and a combining module;

the wireless communication module comprises an intermediate frequency modulation unit, a frequency conversion unit and an amplification unit and is used for forming N paths of carrier signals with different frequencies; n is a natural number greater than 1;

the combiner module is used for combining the amplified N carrier signals with different frequencies into one carrier signal to be output;

the transmission channel is a radio frequency cable and is used for transmitting one path of carrier signals output by the transmitting end to the receiving end;

the receiving end comprises a frequency conversion module and an output module;

the frequency conversion module comprises a shunt unit and a frequency conversion unit and is used for converting a received one-path carrier signal into N-path multi-code-stream co-frequency carrier signals;

and the output module is used for combining and outputting the N paths of multi-code stream co-frequency carrier signals.

2. The communication transmission system according to claim 1, wherein: the frequency conversion unit selects 1 path from N paths of carrier signals formed by the intermediate frequency modulation unit to carry out frequency conversion, and the frequency of the converted carrier signals is different from the frequency of the carrier signals before conversion and different from the frequency of the rest N-1 paths of carrier signals.

3. The communication transmission system according to claim 1, wherein: the shunting unit restores the received carrier signal into N carrier signals with different frequencies formed by the wireless communication module; the frequency conversion unit in the frequency conversion module is used for converting N paths of carrier signals with different frequencies into N paths of carrier signals with the same frequency.

4. The communication transmission system according to claim 3, wherein: the frequency conversion mode in the frequency conversion module is that the frequency of the 1 path of carrier signal is kept unchanged, and the rest N-1 paths of carrier signals are converted into carrier signals with the same frequency as the carrier signals which are kept unchanged.

5. The communication transmission system according to claim 1, wherein: the combining module adopts a multi-frequency combiner with frequency multiplexing, a power combiner or other ways capable of realizing multi-channel combining.

6. A multi-frequency signal communication transmission method based on a radio frequency cable is characterized in that: the method comprises the following steps:

s1, forming N carrier signals with different frequencies from the N baseband signals to be transmitted, and then outputting the carrier signals; wherein N is a natural number greater than 1; (ii) a

S2, combining the N carrier signals with different frequencies formed in the step S1 to form a carrier signal;

s3, transmitting the carrier signal formed in the step S2 to a signal receiving end through a transmission channel; the transmission channel is a radio frequency cable;

s4, the signal receiving end carries out shunt processing on the received carrier signal and restores the received carrier signal into N carrier signals with different frequencies output in the step S1;

s5, converting the N paths of carrier signals with different frequencies formed in the step S4 into N paths of multi-code stream co-frequency carrier signals through frequency conversion;

and S6, combining the N paths of multi-code stream co-frequency carrier signals formed in the step S5 and outputting the combined signals.

7. The communication transmission method according to claim 6, characterized in that: in the step S1, the N baseband signals are modulated by the intermediate frequency to form N carrier signals with different frequencies, and then 1 of the carrier signals is subjected to frequency conversion and amplified with the remaining N-1 carrier signals.

8. The communication transmission method according to claim 7, characterized in that: the frequency of the carrier signal after frequency conversion is different from the frequency of the carrier signal before frequency conversion and different from the frequencies of the rest N-1 paths of carrier signals.

9. The communication transmission method according to claim 6, characterized in that: in step S2, the combining may be a multi-frequency combiner with frequency multiplexing, a power combiner, or other ways that can implement multi-channel combining.

10. The communication transmission method according to claim 6, characterized in that: in the step S5, the frequency conversion mode is to select one of the 1 channels of carrier signals with the frequency being kept unchanged, and convert the remaining N-1 channels of carrier signals into carrier signals with the same frequency as the carrier signals with the frequency being kept unchanged.

Technical Field

The invention relates to the technical field of communication, in particular to a multi-frequency signal communication transmission system and method based on a radio frequency cable.

Background

MIMO (Multiple Input Multiple Output, abbreviation of english Multiple-Input Multiple-Output) technology can fully utilize space resources, and improve the channel capacity of the system by times, and has become a core technology in the field of communication technology. The current wireless communication system mostly adopts MIMO technology, and therefore, the wireless communication device is mostly designed to directly convert a plurality of baseband signals into a plurality of multi-code-stream co-frequency carrier signals (i.e. MIMO signals conforming to MIMO channels) for output. Currently, there are two commonly used embodiments:

first, in prior art 1, as shown in fig. 1, a wireless communication module performs intermediate frequency modulation, frequency conversion and amplification on N baseband signals to form N carrier signals with the same frequency, and then sends the carrier signals to an output module through N physical transmission paths. This method requires that N physical transmission channels are established between the wireless communication module and the output module, and the conventional wireless communication network usually has only one physical transmission channel between the wireless communication module and the output module, which results in a huge engineering load and high cost for transforming the conventional wireless communication network.

Secondly, in the prior art scheme 2, as shown in fig. 2, the wireless communication module performs intermediate frequency modulation, frequency conversion and amplification on N baseband signals to form N carrier signals with the same frequency; then the power and frequency of the 1 path of carrier signals are kept unchanged through the frequency conversion module 1, other N-1 paths of carrier signals are attenuated and frequency converted to form N paths of carrier signals with different frequencies, the N paths of carrier signals with different frequencies are combined through the combining module, and then the combined carrier signals are transmitted to the frequency conversion module 2 through a physical transmission channel. The frequency conversion module 2 recovers N carrier signals with different frequencies through the shunt unit, so that the frequency of the carrier signal of 1 path is kept unchanged, and other carrier signals of N-1 paths form N-1 carrier signals with the same frequency as the carrier signal kept unchanged through frequency conversion. And outputting the N carrier signals with the same frequency through an output module. In the mode, the problem of insufficient number of physical transmission channels between the wireless communication module and the output module is solved by adopting the frequency conversion module, but after N baseband signals in the wireless communication module are subjected to intermediate frequency modulation, frequency conversion and amplification, the output power is completely the same; the output power is adjusted within a range of several watts to several hundred watts; the input power of the frequency conversion unit in the frequency conversion module is limited by devices and must be milliwatt, so that signals output by the wireless communication module must be attenuated, and a large amount of electric energy is wasted; meanwhile, N baseband signals in the wireless communication module undergo intermediate frequency modulation, frequency conversion and amplification, and then undergo frequency conversion for multiple times through the external frequency conversion module, so that the signal-to-noise ratio of the signals is seriously damaged.

Disclosure of Invention

The invention aims to provide a multi-frequency signal communication transmission system based on a radio frequency cable, and the other aim of the invention is to provide a multi-frequency signal communication transmission method based on a radio frequency cable, which is used for solving the problems of large engineering quantity, high cost, electricity waste and signal-to-noise ratio damage existing in the prior art when multi-code stream same-frequency carrier signals are transmitted between a wireless communication module and an output module.

In order to achieve the purpose, the invention can adopt the following technical scheme:

the invention relates to a multi-frequency signal communication transmission system based on a radio frequency cable, which comprises a sending end, a transmission channel and a receiving end, wherein the sending end is used for sending a multi-frequency signal to the receiving end;

the transmitting end comprises a wireless communication module and a combining module;

the wireless communication module comprises an intermediate frequency modulation unit, a frequency conversion unit and an amplification unit and is used for forming N paths of carrier signals with different frequencies; n is a natural number greater than 1;

the combiner module is used for combining the amplified N carrier signals with different frequencies into one carrier signal and outputting the carrier signal;

the transmission channel is a radio frequency cable and is used for transmitting one path of carrier signals output by the transmitting end to the receiving end;

the receiving end comprises a frequency conversion module and an output module;

the frequency conversion module comprises a shunt unit and a frequency conversion unit and is used for converting a received one-path carrier signal into N-path multi-code-stream co-frequency carrier signals;

and the output module is used for combining and outputting the N paths of multi-code stream co-frequency carrier signals.

Further, the frequency conversion unit in the wireless communication module selects 1 channel from the N channels of carrier signals formed by the intermediate frequency modulation unit to perform frequency conversion, and the frequency of the converted carrier signal is different from the frequency of the carrier signal before conversion and different from the frequency of the remaining N-1 channels of carrier signals.

Further, the branching unit restores the received one path of carrier signal to N paths of carrier signals with different frequencies formed by the wireless communication module; the frequency conversion unit in the frequency conversion module is used for converting N paths of carrier signals with different frequencies into N paths of carrier signals with the same frequency.

Furthermore, the frequency conversion mode in the frequency conversion module is that the frequency of the 1 path of carrier signal is kept unchanged, and the rest N-1 paths of carrier signals are converted into carrier signals with the same frequency as the carrier signals which are kept unchanged.

Preferably, the combining module adopts a multi-frequency combiner with frequency multiplexing, a power combiner or other ways capable of realizing multi-channel combining.

The invention discloses a multi-frequency signal communication transmission method based on a radio frequency cable, which comprises the following steps:

s1, forming N carrier signals with different frequencies from the N baseband signals to be transmitted, and then outputting the carrier signals; wherein N is a natural number greater than 1; (ii) a

S2, combining the N carrier signals with different frequencies formed in the step S1 to form a carrier signal;

s3, transmitting the carrier signal formed in the step S2 to a signal receiving end through a transmission channel; the transmission channel is a radio frequency cable;

s4, the signal receiving end carries out shunt processing on the received carrier signal and restores the received carrier signal into N carrier signals with different frequencies output in the step S1;

s5, converting the N paths of carrier signals with different frequencies formed in the step S4 into N paths of multi-code stream co-frequency carrier signals through frequency conversion;

and S6, combining the N paths of multi-code stream co-frequency carrier signals formed in the step S5 and outputting the combined signals.

Further, in step S1, the N baseband signals are modulated by the intermediate frequency to form N carrier signals with different frequencies, and then 1 of the carrier signals is subjected to frequency conversion and amplified with the remaining N-1 carrier signals.

Further, the frequency of the carrier signal after frequency conversion is different from the frequency of the carrier signal before frequency conversion, and is different from the frequencies of the rest N-1 paths of carrier signals.

Preferably, in step S2, the combining is performed by a frequency-multiplexing multi-frequency combiner, a power combiner, or other ways that can implement multi-channel combining.

Further, in step S5, the frequency conversion method is to select one of the 1 channels of carrier signals and keep the frequency unchanged, and convert the remaining N-1 channels of carrier signals into carrier signals with the same frequency as the carrier signals with the unchanged frequency.

The invention has the advantages that the wireless communication module outputs N carrier signals from a plurality of ports, the N carrier signals are combined and then transmitted to a receiving end through a transmission channel, and the MIMO signal can be formed through a frequency conversion module, thereby greatly reducing the equipment cost, the power consumption and the development and construction difficulty, and improving the signal-to-noise ratio and the efficiency of the signal.

Drawings

Fig. 1 is a flow chart of prior art scheme 1.

Fig. 2 is a prior art scheme 2 flow diagram.

FIG. 3 is a block diagram of the system and method of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 3, the multiple frequency signal communication transmission system based on rf cable of the present invention includes a transmitting end, a transmission channel, and a receiving end;

the transmitting end comprises a wireless communication module and a combining module and is used for converting the N baseband signals into a path of carrier signals and then outputting the carrier signals; n is a natural number greater than 1;

the wireless communication module comprises an intermediate frequency modulation unit, a frequency conversion unit and an amplification unit and is used for forming N paths of carrier signals with different frequencies; the intermediate frequency modulation is used for converting N-path baseband signals to be transmitted into N-path carrier signals with different frequencies; the frequency conversion unit is used for selecting 1 path of carrier signals from the N paths of carrier signals and converting the 1 path of carrier signals into 1 path of new carrier signals; the frequency of the new carrier signal after conversion is different from that of the carrier signal before conversion, and is also different from that of the rest N-1 paths of carrier signals; the amplification unit user amplifies N paths of carrier signals with different frequencies; the combiner module is used for combining the amplified N carrier signals with different frequencies into one carrier signal and outputting the carrier signal;

the transmission channel is a radio frequency cable and is used for transmitting a path of carrier signal output by the sending end to the receiving end;

the receiving end comprises a frequency conversion module and an output module, and is used for converting one path of carrier signal into N paths of multi-code stream same-frequency carrier signals, and combining and outputting the carrier signals; the frequency conversion module comprises a shunt unit and a frequency conversion unit; the system is used for converting a received one-path carrier signal into N-path multi-code-stream co-frequency carrier signals; the shunting unit restores the received carrier signal to N carrier signals with different frequencies formed by the wireless communication module of the sending end; the frequency conversion unit is used for converting N paths of carrier signals with different frequencies into N paths of carrier signals with the same frequency; the conversion mode is that the frequency of the 1 path of carrier signal is kept unchanged, and the rest N-1 paths of carrier signals are converted into carrier signals with the same frequency as the carrier signals which are kept unchanged;

and the output module is used for combining and outputting the N paths of multi-code stream co-frequency carrier signals.

As shown in fig. 3, the present invention provides a multiple frequency signal communication transmission method based on a radio frequency cable, which includes the following steps:

s1, carrying out intermediate frequency modulation on the N-path baseband signals to be transmitted to form N carrier signals with different frequencies, selecting 1 path of carrier signals, carrying out frequency conversion on the selected 1 path of carrier signals to form 1 path of new carrier signals, wherein the frequency of the carrier signals is different from the frequency of the rest N-1 paths of carrier signals; outputting a new carrier signal formed after frequency conversion and the rest N-1 paths of carrier signals; wherein the frequencies of the output N paths of carrier signals are different from each other; n is a natural number greater than 1; (ii) a

S2, combining the N carrier signals with different frequencies formed in the step S1 to form a carrier signal; the combination can adopt a multi-frequency combiner with frequency multiplexing, a power combiner or other ways of realizing multi-channel combination.

S3, transmitting the carrier signal formed in the step S2 to a signal receiving end through a transmission channel; the transmission channel is a radio frequency cable;

s4, the signal receiving end carries out shunt processing on the received carrier signal and restores the received carrier signal into N carrier signals with different frequencies output in the step S1;

s5, converting the N paths of carrier signals with different frequencies formed in the step S4 into N paths of multi-code stream co-frequency carrier signals through frequency conversion; the frequency conversion mode is to select 1 path of carrier signal with unchanged frequency and convert the rest N-1 paths of carrier signals into carrier signals with the same frequency as the carrier signals with unchanged frequency;

and S6, combining the N paths of multi-code stream co-frequency carrier signals formed in the step S5 and outputting the combined signals.

In the specific embodiment, taking a china unicom 4G signal MIMO transmission mode as an example, the specific implementation process of the method of the present invention is detailed:

the China Unicom 4G wireless communication module is provided with 2 channels in total, and the output frequency of a main channel is 1850 and 1860 MHz; the output frequency of the other channel is 624-634 MHz; the two paths of carrier signals with different frequencies output by the wireless communication module have frequencies of 624-634MHz and 1850-1860MHz respectively. And forming a path of carrier signal through the combiner. The one path of carrier signal is transmitted to the splitter of the frequency conversion module through the radio frequency cable, and the splitter restores the one path of carrier signal into two paths of carrier signals with different frequencies output by the wireless communication module, wherein the frequencies are 624-634MHz and 1850-1860MHz respectively. Wherein, the signals with the frequencies of 1850-1860MHz are retained unchanged, the signals with the frequencies of 624-634MHz are converted into the signals with the frequencies of 1850-1860MHz after being processed by the frequency conversion unit, and then the 2 paths of signals are merged for output.