Communication method and communication system

Abstract

A communication method and a communication system, relating to the technical field of communications. The communication system comprises an optoelectronic module 1 and an optoelectronic module 2. The optoelectronic module 1 performs electro-optical conversion on an analog signal 1 and an analog signal 2 to obtain an analog optical signal of the analog signal 1 and an analog optical signal of the analog signal 2, and outputs the analog optical signal of the analog signal 1 and the analog optical signal of the analog signal 2 to the optoelectronic module 2 via one optical fiber, wherein a carrier frequency of the analog signal 1 differs from that of the analog signal 2. The optoelectronic module 2 performs optical-electrical conversion on the analog optical signal of the analog signal 1 and the analog optical signal of the analog signal 2 to obtain the analog signal 1 and the analog signal 2. Since the carrier frequency of the analog signal 1 differs from that of the analog signal 2, the analog signal 1 and the analog signal 2 do not mix, so that the analog optical signals of the two analog signals can be transmitted via one optical fiber, thereby enabling the transmission of a plurality of signals at the same frequency at low costs.

Description

Communication method and communication system

[0001] This application claims priority to the Chinese patent application No. 202411374465.3, filed on September 27, 2024, and entitled "Communication method and communication system", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of communication technology, and more particularly, to a communication method and a communication system. BACKGROUND

[0003] A fiber repeater is a kind of repeater that transmits signals through optical fibers. The fiber repeater mainly includes a near-end device, an optical fiber, and a far-end device. The optical fiber is used to connect the near-end device and the far-end device. Both the near-end device and the far-end device include a radio frequency unit and an optoelectronic module (used for conversion between optical signals and electrical signals). Taking downlink transmission as an example, the near-end device performs electro-optical conversion on the downlink signals of a base station, and transmits optical signals based on the aforementioned optical-electric conversion to the far-end device through the optical fiber. The far-end device performs optical-electric conversion on the received optical signals to obtain electrical signals, and inputs the electrical signals into the radio frequency unit for amplification processing. After the amplification processing, the electrical signals are sent to a transmitting antenna, thereby covering a target area.

[0004] However, the existing fiber repeater cannot realize the transmission of multiple same-frequency signals at a low cost. Therefore, how to realize the transmission of multiple same-frequency signals at a low cost is a technical problem to be solved at present. SUMMARY

[0005] The present application provides a communication method and a communication system, which can realize the transmission of multiple same-frequency signals at a low cost.

[0006] In a first aspect, a communication system is provided, comprising: a first module and a second module, the first module comprising a first optoelectronic module, and the second module comprising a second optoelectronic module. The first optoelectronic module is configured to perform electro-optical conversion on received first analog signals and second analog signals to obtain analog optical signals of the first analog signals and analog optical signals of the second analog signals, and output the analog optical signals of the first analog signals and the analog optical signals of the second analog signals to the second optoelectronic module through an analog optical wireless communication optical fiber, the frequency points of the first analog signals being different from the frequency points of the second analog signals. The second optoelectronic module is configured to perform optical-electric conversion on the received analog optical signals of the first analog signals and the analog optical signals of the second analog signals to obtain the first analog signals and the second analog signals.

[0007] The communication system in the first aspect can be composed of different devices, for example, the first module is a near-end device and the second module is a far-end device; or the communication system in the first aspect can be composed of one device, and the first module and the second module are different components of the device, which is not limited. In summary, the embodiments of the present application do not limit the composition of the communication system.

[0008] Since the frequency point of the first analog signal is different from the frequency point of the second analog signal, mixing phenomenon does not occur between the first analog signal and the second analog signal, so that the analog optical signals of the two analog signals can be transmitted through one optical fiber, and the transmission of multiple same-frequency signals can be realized at a lower cost, for example, without the need for more optical fibers. In addition, compared with the prior art transmission scheme using multiple optical fibers, since the analog optical signals of multiple analog signals are transmitted through one optical fiber, the implementation complexity of the communication system can be reduced.

[0009] In the second aspect, a communication system is provided, including: a first module and a second module, the first module including a first optoelectronic module, and the second module including a second optoelectronic module. The first optoelectronic module is configured to perform electro-optical conversion and wavelength shifting processing on received first analog signals and second analog signals, to obtain analog optical signals of the first analog signals and analog optical signals of the second analog signals, and output the analog optical signals of the first analog signals and the analog optical signals of the second analog signals to the second optoelectronic module through one analog optical wireless communication optical fiber, the wavelength of the analog optical signals of the first analog signals being different from the wavelength of the analog optical signals of the second analog signals. The second optoelectronic module is configured to perform optical-electrical conversion and wavelength shifting processing on the received analog optical signals of the first analog signals and the analog optical signals of the second analog signals, to obtain the first analog signals and the second analog signals.

[0010] For the beneficial effects of the communication system in the second aspect, reference can be made to the description of the beneficial effects of the communication system in the first aspect.

[0011] Since the wavelength of the analog optical signals of the first analog signals is different from the wavelength of the analog optical signals of the second analog signals, mixing phenomenon does not occur between the first analog signals and the second analog signals, so that the analog optical signals of the two analog signals can be transmitted through one optical fiber, and the transmission of multiple same-frequency signals can be realized at a lower cost, for example, without the need for more optical fibers.

[0012] In some implementations of the first aspect and the second aspect, the frequency point of the first analog signal is different from the frequency point of the second analog signal, the first module further includes a first circuit, and the second module further includes a second circuit, an output terminal of the first circuit is connected with an input terminal of the first optoelectronic module, and an output terminal of the second optoelectronic module is connected with an input terminal of the second circuit. The first circuit is configured to perform signal processing on the input first digital signal to obtain the first analog signal, and output the first analog signal to the first optoelectronic module, the frequency point of the first analog signal being different from the frequency point of the first digital signal. The second circuit is configured to perform signal processing on the input first analog signal to obtain a third analog signal, the frequency point of the third analog signal being the same as the frequency point of the first digital signal. In this way, frequency shift processing can be supported on the signal, thereby enabling transmission of analog optical signals of two analog signals through one optical fiber.

[0013] In some implementations of the first aspect and the second aspect, the first circuit includes a digital-to-analog conversion device, a first power amplifier, a first frequency shift device, and a first combiner. The digital-to-analog conversion device is configured to perform digital-to-analog conversion on the input first digital signal to obtain an analog signal of the first digital signal, and output the analog signal of the first digital signal to the first power amplifier. The first power amplifier is configured to perform amplification processing on the analog signal of the first digital signal to obtain a fourth analog signal, and output the fourth analog signal to the first combiner. The first combiner is configured to perform combining processing on the fourth analog signal and a first local oscillator signal output by the first frequency shift device, and output the first analog signal to the first optoelectronic module, the first local oscillator signal being used for frequency shift of the fourth analog signal. In this way, the analog signal subjected to frequency shift processing can be output to the optoelectronic module.

[0014] In some implementations of the first aspect and the second aspect, the first circuit includes a digital-to-analog conversion device, a first combiner, a first frequency shift device, and a first power amplifier. The digital-to-analog conversion device is configured to perform digital-to-analog conversion on the input first digital signal to obtain an analog signal of the first digital signal, and output the analog signal of the first digital signal to the first combiner. The first combiner is configured to perform combining processing on the analog signal of the first digital signal and a first local oscillator signal output by the first frequency shift device, and output a fifth analog signal to the first power amplifier, the first local oscillator signal being used for frequency shift of the analog signal of the first digital signal, and the frequency point of the fifth analog signal being the same as the frequency point of the first analog signal. The first power amplifier is configured to perform amplification processing on the fifth analog signal to obtain the first analog signal, and output the first analog signal to the first optoelectronic module. In this way, the analog signal subjected to frequency shift processing can be output to the optoelectronic module.

[0015] In some implementations of the first aspect and the second aspect, the first circuit includes a first combiner, a first frequency shifting device, a digital-to-analog conversion device, and a first power amplifier. The first combiner is configured to combine the input first digital signal and a first local oscillator signal output by the first frequency shifting device, and output a second digital signal to the digital-to-analog conversion device, a frequency point of the second digital signal being the same as a frequency point of the first analog signal, the first local oscillator signal being used for frequency shifting of the first digital signal. The digital-to-analog conversion device is configured to perform digital-to-analog conversion on the second digital signal to obtain an analog signal of the second digital signal, and output the analog signal of the second digital signal to the first power amplifier. The first power amplifier is configured to amplify the analog signal of the second digital signal to obtain the first analog signal, and output the first analog signal to the first optoelectronic module. In this way, this can support outputting an analog signal that has been subjected to frequency shifting to the optoelectronic module.

[0016] In some implementations of the first aspect and the second aspect, the second circuit includes a second combiner and a second frequency shifting device. The second combiner is configured to combine the input first analog signal and a second local oscillator signal output by the second frequency shifting device, and output a third analog signal, the second local oscillator signal being used for frequency shifting of the first analog signal. In this way, this can perform inverse frequency shifting on the analog signal output by the optoelectronic module.

[0017] In some implementations of the first aspect and the second aspect, the first module further includes a first signal processing unit, and the second module further includes a second signal processing unit. The first signal processing unit is configured to perform signal processing on the input air interface signal to obtain the first digital signal, and output the first digital signal to the first circuit. The second signal processing unit is configured to perform signal processing on the third analog signal output by the second circuit to obtain an air interface signal corresponding to the third analog signal, and output the air interface signal corresponding to the third analog signal. In this way, this can support completing processing on the signal.

[0018] In some implementations of the first and second aspects, the first module further comprises a third signal processing unit and a third combiner. The third combiner comprises a first input port and a second input port, the first input port is configured to input a sixth analog signal and a seventh analog signal, the seventh analog signal is received after the eighth analog signal, the sixth analog signal is a signal processed from the eighth analog signal and finally output, the sixth analog signal is a signal based on the third analog signal, the second input port is configured to input a ninth analog signal, the ninth analog signal is a quadrature signal of the sixth analog signal. An output port of the third combiner is connected with an input port of the first signal processing unit, an output port of the first signal processing unit is connected with an input port of the first circuit and an input port of the third signal processing unit, an output port of the third signal processing unit is connected with the second input port. The first signal processing unit is configured to process the eighth analog signal input by the third combiner to obtain a first digital signal, and output the first digital signal, the sixth analog signal is a signal based on the third analog signal. The third signal processing unit is configured to process the first digital signal and output the ninth analog signal.

[0019] In this way, when the third combiner receives the sixth analog signal, the seventh analog signal and the ninth analog signal, the third combiner can use the ninth analog signal to cancel the sixth analog signal, thereby reducing the transmission interference of the sixth analog signal on the seventh analog signal, and further improving the anti-self-excitation interference capability of the communication system.

[0020] In some implementations of the first aspect and the second aspect, the first module further comprises a fourth signal processing unit, a fourth combiner, and a third frequency shifting device, and the second module further comprises a fourth frequency shifting device, a fifth combiner, and a sixth combiner. The input port of the fourth signal processing unit is connected to the output port of the first signal processing unit, the input ports of the fourth combiner and the output port of the fourth signal processing unit, and the output port of the third frequency shifting device are connected, the output port of the fourth combiner is connected to the input port of the first optoelectronic module, the input ports of the fifth combiner and the output port of the second optoelectronic module, and the output port of the fourth frequency shifting device are connected, the output port of the fifth combiner is connected to the input port of the sixth combiner, and the input port of the sixth combiner is further connected to the output port of the second signal processing unit. The fourth signal processing unit is configured to perform signal processing on the first digital signal and output an alternating signal of a noise signal, the noise signal being formed when the first digital signal is signal amplified. The fourth combiner is configured to perform combing processing on the alternating signal of the noise signal and a third local signal output by the third frequency shifting device, and output a tenth analog signal to the first optoelectronic module, the third local signal being used for frequency shifting of the alternating signal of the noise signal, and the frequency point of the tenth analog signal being the same as that of the first analog signal. The first optoelectronic module is configured to perform photoelectric conversion on the tenth analog signal to obtain an analog optical signal of the tenth analog signal, and transmit the tenth analog signal to the second optoelectronic module through an analog optical wireless communication. The second optoelectronic module is configured to perform electro-optical conversion on the analog optical signal of the tenth analog signal to obtain the tenth analog signal, and output the tenth analog signal to the fifth combiner. The fifth combiner is configured to perform combing processing on the tenth analog signal and a fourth local signal output by the fourth frequency shifting device, and output an eleventh analog signal to the sixth combiner, the fourth local signal being used for frequency shifting of the tenth analog signal, and the frequency point of the eleventh analog signal being the same as that of the third analog signal. The sixth combiner is configured to perform combing processing on the eleventh analog signal and a twelfth analog signal, and output a signal obtained through the combing processing, the twelfth analog signal being a signal obtained by the fourth signal processing unit performing signal processing on the third analog signal, and the twelfth analog signal comprising the noise signal. In this way, the communication system can enhance the ability to resist noise interference.

[0021] In some implementations of the first aspect, the wavelength of the analog optical signal of the first analog signal is the same as that of the analog optical signal of the second analog signal. In this way, the analog optical signal of the first analog signal and the analog optical signal of the second analog signal do not need to be subjected to wavelength shifting processing, thereby reducing the implementation complexity of the communication system.

[0022] In some implementations of the second aspect, the frequency point of the first analog signal is the same as the frequency point of the second analog signal, the first module further includes a first circuit, and the second module further includes a second circuit, an output terminal of the first circuit is connected with an input terminal of the first optoelectronic module, and an output terminal of the second optoelectronic module is connected with an input terminal of the second circuit. The first circuit is configured to perform signal processing on the input first digital signal to obtain the first analog signal, and output the first analog signal to the first optoelectronic module, the frequency point of the first analog signal being the same as the frequency point of the first digital signal. The second circuit is configured to perform signal processing on the input first analog signal to obtain the third analog signal, the frequency point of the third analog signal being the same as the frequency point of the first digital signal.

[0023] It is to be understood that the beneficial effects of some implementations of the second aspect can be found in the foregoing description of the beneficial effects of some implementations of the first aspect.

[0024] In some implementations of the second aspect, the frequency point of the first analog signal is the same as the frequency point of the second analog signal, and the first circuit includes a digital-to-analog conversion device and a first power amplifier. The digital-to-analog conversion device is configured to perform digital-to-analog conversion on the input first digital signal to obtain an analog signal of the first digital signal, and output the analog signal of the first digital signal to the first power amplifier. The first power amplifier is configured to perform amplification processing on the analog signal of the first digital signal to obtain the first analog signal, and output the first analog signal to the first optoelectronic module.

[0025] In some implementations of the second aspect, the frequency point of the first analog signal is the same as the frequency point of the second analog signal, the first module further includes a first signal processing unit, and the second module further includes a second signal processing unit. The first signal processing unit is configured to perform signal processing on the input air interface signal to obtain the first digital signal, and output the first digital signal to the first circuit. The second signal processing unit is configured to perform signal processing on the third analog signal output by the second circuit to obtain an air interface signal corresponding to the third analog signal, and output the air interface signal corresponding to the third analog signal.

[0026] In some implementations of the second aspect, the frequency point of the first analog signal is the same as the frequency point of the second analog signal, and the first module further comprises a third signal processing unit and a first combiner. The first combiner comprises a first input port and a second input port, the first input port is configured to input a thirteenth analog signal and a fourteenth analog signal, the receiving time of the fourteenth analog signal is later than the receiving time of a fifteenth analog signal, the thirteenth analog signal is a signal obtained by signal processing and finally outputting the fifteenth analog signal, the thirteenth analog signal is a signal obtained based on the third analog signal, and the second input port is configured to input a sixteenth analog signal, the sixteenth analog signal is a heterodyne signal of the thirteenth analog signal. The output port of the first combiner is connected with the input port of the first signal processing unit, the output port of the first signal processing unit is connected with the input port of the first circuit and the input port of the third signal processing unit, and the output port of the third signal processing unit is connected with the second input port. The first signal processing unit is configured to perform signal processing on the fifteenth analog signal input by the first combiner to obtain a first digital signal, and output the first digital signal. The third signal processing unit is configured to perform signal processing on the first digital signal and output the sixteenth analog signal.

[0027] In some implementations of the second aspect, the frequency point of the first analog signal is the same as the frequency point of the second analog signal, and the first module further comprises a fourth signal processing unit, the second module further comprises a second combiner, the input port of the fourth signal processing unit is connected with the output port of the first signal processing unit, the output port of the fourth signal processing unit is connected with the input port of the first optoelectronic module, the first input port of the second combiner is connected with the output port of the second optoelectronic module, and the second input port of the second combiner is connected with the output port of the second signal processing unit. The fourth signal processing unit is configured to perform signal processing on the first digital signal and output a heterodyne signal of a noise signal to the first optoelectronic module, the noise signal is formed when signal amplification processing is performed on the first digital signal, and the frequency point of the heterodyne signal of the noise signal is the same as the frequency point of the first analog signal. The first optoelectronic module is configured to perform electro-optical conversion and wavelength shifting processing on the heterodyne signal of the noise signal to obtain an analog optical signal of the heterodyne signal of the noise signal, and transmit the analog optical signal of the heterodyne signal of the noise signal to the second optoelectronic module through the one analog optical wireless communication. The second optoelectronic module is configured to perform wavelength shifting processing and photoelectric conversion on the analog optical signal of the heterodyne signal of the noise signal to obtain the heterodyne signal of the noise signal, and output the heterodyne signal of the noise signal to the second combiner. The second combiner is configured to perform combining processing on the heterodyne signal of the noise signal and a seventeenth analog signal, and output a signal obtained by the combining processing, the seventeenth analog signal is a signal obtained by the fourth signal processing unit performing signal processing on the third analog signal, and the seventeenth analog signal comprises the noise signal.

[0028] In a third aspect, a communication method is provided, including: a first optoelectronic module performing photoelectric conversion on received first and second analog signals to obtain analog optical signals of the first and second analog signals, and outputting the analog optical signals of the first and second analog signals through one analog optical wireless communication fiber, the first analog signal having a frequency point different from that of the second analog signal; and a second optoelectronic module performing electro-optical conversion on the received analog optical signals of the first and second analog signals to obtain the first and second analog signals.

[0029] It is to be noted that the beneficial effects of the third aspect can be seen from the description of the first aspect, and thus will not be repeated here.

[0030] In a fourth aspect, a communication method is provided, including: a first optoelectronic module performing photoelectric conversion and wavelength shifting on received first and second analog signals to obtain analog optical signals of the first and second analog signals, and outputting the analog optical signals of the first and second analog signals through one analog optical wireless communication fiber, the analog optical signal of the first analog signal having a wavelength different from that of the second analog signal; and a second optoelectronic module performing wavelength shifting and electro-optical conversion on the received analog optical signals of the first and second analog signals to obtain the first and second analog signals.

[0031] It is to be noted that the beneficial effects of the fourth aspect can be seen from the description of the second aspect, and thus will not be repeated here.

[0032] In some implementations of the third and fourth aspects, the first analog signal has a frequency point different from that of the second analog signal, and the method further includes: a first circuit performing signal processing on input first digital signals to obtain the first analog signal, and outputting the first analog signal to the first optoelectronic module, the first analog signal having a frequency point different from that of the first digital signals; and a second circuit performing signal processing on the input first analog signal to obtain a third analog signal, the third analog signal having a frequency point same as that of the first digital signals.

[0033] In some implementations of the third and fourth aspects, the frequency point of the first analog signal is different from the frequency point of the second analog signal, the first circuit includes a digital-to-analog conversion device, a first power amplifier, a first frequency shift device, and a first combiner, and the first circuit performs signal processing on the input first digital signal to obtain the first analog signal, including: the digital-to-analog conversion device performs digital-to-analog conversion on the input first digital signal to obtain an analog signal of the first digital signal, and outputs the analog signal of the first digital signal to the first combiner; the first combiner performs combiner processing on the analog signal of the first digital signal and a first local oscillator signal output by the first frequency shift device, and outputs the first analog signal to the first optoelectronic module, the first local oscillator signal being used for frequency shifting of the analog signal of the first digital signal.

[0034] In some implementations of the third and fourth aspects, the frequency point of the first analog signal is different from the frequency point of the second analog signal, the first circuit includes a digital-to-analog conversion device, a first power amplifier, a first frequency shift device, and a first combiner, and the first circuit performs signal processing on the input first digital signal to obtain the first analog signal, including: the digital-to-analog conversion device performs digital-to-analog conversion on the input first digital signal to obtain an analog signal of the first digital signal, and outputs the analog signal of the first digital signal to the first combiner; the first combiner performs combiner processing on the analog signal of the first digital signal and a first local oscillator signal output by the first frequency shift device, and outputs the first analog signal to the first power amplifier, the first local oscillator signal being used for frequency shifting of the analog signal of the first digital signal, and the frequency point of a fifth analog signal is the same as that of the first analog signal; the first power amplifier performs amplification processing on the fifth analog signal to obtain the first analog signal, and outputs the first analog signal to the first optoelectronic module.

[0035] In some implementations of the third and fourth aspects, the frequency point of the first analog signal is different from the frequency point of the second analog signal, the first circuit includes a digital-to-analog conversion device, a first power amplifier, a first frequency shift device, and a first combiner, and the first circuit performs signal processing on the input first digital signal to obtain the first analog signal, including: the first combiner performs combiner processing on the input first digital signal and a first local oscillator signal output by the first frequency shift device, and outputs a second digital signal to the digital-to-analog conversion device, the frequency point of the second digital signal being the same as that of the first analog signal, and the first local oscillator signal being used for frequency shifting of the first digital signal; the digital-to-analog conversion device performs digital-to-analog conversion on the second digital signal to obtain an analog signal of the second digital signal, and outputs the analog signal of the second digital signal to the first power amplifier; the first power amplifier performs amplification processing on the analog signal of the second digital signal to obtain the first analog signal, and outputs the first analog signal to the first optoelectronic module.

[0036] In some implementations of the third and fourth aspects, the frequency point of the first analog signal is different from the frequency point of the second analog signal, the second circuit includes a second combiner and a second frequency shifting device, and the second circuit performs signal processing on the input first analog signal to obtain a third analog signal: the second frequency shifting device outputs a second local oscillator signal to the second combiner; the second combiner performs combiner processing on the input first analog signal and the second local oscillator signal, and outputs the third analog signal, and the second local oscillator signal is used for frequency shifting of the first analog signal.

[0037] In some implementations of the third and fourth aspects, the frequency point of the first analog signal is different from the frequency point of the second analog signal, and the method further includes: the first signal processing unit performs signal processing on the input air interface signal to obtain a first digital signal, and outputs the first digital signal to the first circuit; and the second signal processing unit is configured to perform signal processing on the third analog signal output by the second circuit to obtain air interface information corresponding to the third analog signal, and output an air interface signal corresponding to the third analog signal.

[0038] In some implementations of the third and fourth aspects, the frequency point of the first analog signal is different from the frequency point of the second analog signal, and the method further includes: the first signal processing unit performs signal processing on the input eighth analog signal of the third combiner to obtain a first digital signal, and outputs the first digital signal, and the sixth analog signal is a signal obtained based on the third analog signal; the third signal processing unit performs signal processing on the first digital signal and outputs a ninth analog signal; the third combiner performs combiner processing on the input sixth analog signal, seventh analog signal and ninth analog signal, and outputs a signal obtained by combiner processing, the receiving time of the seventh analog signal is after the receiving time of the eighth analog signal, the sixth analog signal is a signal obtained by signal processing and finally outputting the eighth analog signal, the sixth analog signal is a signal obtained based on the third analog signal, the second input port is configured to input the ninth analog signal, and the ninth analog signal is a quadrature signal of the sixth analog signal.

[0039] In some implementations of the third and fourth aspects, the frequency point of the first analog signal is different from the frequency point of the second analog signal, and the method further includes: the fourth signal processing unit performing signal processing on the first digital signal and outputting an alternating signal of a noise signal, the noise signal being formed when the first digital signal is signal amplified; the fourth combiner performing combiner processing on the alternating signal of the noise signal and a third local oscillator signal output by the third frequency shifting device, and outputting a tenth analog signal to the first optoelectronic module, the third local oscillator signal being used for frequency shifting of the alternating signal of the noise signal, the frequency point of the tenth analog signal being the same as the frequency point of the first analog signal; the first optoelectronic module performing photoelectric conversion on the tenth analog signal to obtain an analog optical signal of the tenth analog signal, and transmitting the tenth analog signal to the second optoelectronic module through an analog optical wireless communication; the second optoelectronic module performing electro-optical conversion on the analog optical signal of the tenth analog signal to obtain the tenth analog signal, and outputting the tenth analog signal to the fifth combiner; the fifth combiner performing combiner processing on the tenth analog signal and a fourth local oscillator signal output by the fourth frequency shifting device, and outputting an eleventh analog signal to the sixth combiner, the fourth local oscillator signal being used for frequency shifting of the tenth analog signal, the frequency point of the eleventh analog signal being the same as the frequency point of the third analog signal; and the sixth combiner performing combiner processing on the eleventh analog signal and a twelfth analog signal, and outputting a signal obtained through the combiner processing, the twelfth analog signal being a signal obtained by the fourth signal processing unit performing signal processing on the third analog signal, and the twelfth analog signal including the noise signal.

[0040] In some implementations of the fourth aspect, the frequency point of the first analog signal is different from the frequency point of the second analog signal, and the method further includes: the first circuit performing signal processing on the input first digital signal to obtain the first analog signal, and outputting the first analog signal to the first optoelectronic module, the frequency point of the first analog signal being the same as the frequency point of the first digital signal; and the second circuit performing signal processing on the input first analog signal to obtain a third analog signal, the frequency point of the third analog signal being the same as the frequency point of the first digital signal.

[0041] In some implementations of the fourth aspect, the frequency point of the first analog signal is the same as the frequency point of the second analog signal, and the first circuit includes a digital-to-analog conversion device and a first power amplifier, the first circuit performing signal processing on the input first digital signal to obtain the first analog signal, including: the digital-to-analog conversion device performing digital-to-analog conversion on the input first digital signal to obtain an analog signal of the first digital signal, and outputting the analog signal of the first digital signal to the first power amplifier; and the first power amplifier performing amplification processing on the analog signal of the first digital signal to obtain the first analog signal, and outputting the first analog signal to the first optoelectronic module.

[0042] In some implementations of the fourth aspect, the frequency point of the first analog signal is the same as the frequency point of the second analog signal, and the method further includes: the first signal processing unit performing signal processing on the input air interface signal to obtain a first digital signal, and outputting the first digital signal to the first circuit; and the second signal processing unit performing signal processing on the third analog signal output by the second circuit to obtain an air interface signal corresponding to the third analog signal, and outputting the air interface signal corresponding to the third analog signal.

[0043] In some implementations of the fourth aspect, the frequency point of the first analog signal is the same as the frequency point of the second analog signal, and the method further includes: the first signal processing unit performing signal processing on the input air interface signal to obtain a first digital signal, and outputting the first digital signal to the first circuit; and the second signal processing unit performing signal processing on the third analog signal output by the second circuit to obtain an air interface signal corresponding to the third analog signal, and outputting the air interface signal corresponding to the third analog signal.

[0044] In some implementations of the fourth aspect, the frequency point of the first analog signal is the same as the frequency point of the second analog signal, and the method further includes: the fourth signal processing unit performing signal processing on the first digital signal and outputting an in-phase signal of a noise signal to the first optoelectronic module, the noise signal being formed when the first digital signal is signal amplified, and the frequency point of the in-phase signal of the noise signal being the same as the frequency point of the first analog signal; the first optoelectronic module performing electro-optical conversion and wavelength shifting processing on the in-phase signal of the noise signal to obtain an analog optical signal of the in-phase signal of the noise signal, and transmitting the analog optical signal of the in-phase signal of the noise signal to the second optoelectronic module through the one analog optical wireless communication; the second optoelectronic module performing wavelength shifting processing and photoelectric conversion on the analog optical signal of the in-phase signal of the noise signal to obtain the in-phase signal of the noise signal, and outputting the in-phase signal of the noise signal to the second combiner; and the second combiner performing combing processing on the in-phase signal of the noise signal and a seventeenth analog signal, and outputting a signal obtained through the combing processing, the seventeenth analog signal being a signal obtained by the fourth signal processing unit performing signal processing on the third analog signal, and the seventeenth analog signal including the noise signal.

[0045] In a fifth aspect, a communication system is provided, which comprises the base station and the communication system of the first aspect and any possible implementation of the first aspect, and the first analog signal and the second analog signal are obtained by the communication system of the first aspect and any possible implementation of the first aspect according to a signal transmitted by the base station.

[0046] In a sixth aspect, a communication system is provided, which comprises the base station and the communication system of the second aspect and any possible implementation of the second aspect, and the first analog signal and the second analog signal are obtained by the communication system of the second aspect and any possible implementation of the second aspect according to a signal transmitted by the base station. BRIEF DESCRIPTION OF DRAWINGS

[0047] FIG. 1 is a schematic diagram of a structure of an optical fiber repeater 100.

[0048] FIG. 2 is a schematic diagram of a structure of a communication system 200.

[0049] FIG. 3 is a schematic diagram of a structure of the circuit 1 and the circuit 2 of the embodiment of the present application.

[0050] FIG. 4 is a schematic diagram of a structure of the circuit 1 of the embodiment of the present application.

[0051] FIG. 5 is a schematic diagram of a structure of the circuit 1 of the embodiment of the present application.

[0052] FIG. 6 is a schematic diagram of a structure of the circuit 1 of the embodiment of the present application.

[0053] FIG. 7 is a schematic diagram of a structure of the circuit 2 of the embodiment of the present application.

[0054] FIG. 8 is a schematic diagram of a structure of the communication system 200.

[0055] FIG. 9 is a schematic diagram of a structure of the communication system 200.

[0056] FIG. 10 is a schematic diagram of a structure of the communication system 200.

[0057] FIG. 11 is a schematic diagram of another structure of the communication system 200.

[0058] FIG. 12 is a schematic diagram of a structure of the circuit 1.

[0059] FIG. 13 is a schematic diagram of an interaction flow of a communication method of the embodiment of the present application.

[0060] FIG. 14 is a schematic diagram of an interaction flow of another communication method of the embodiment of the present application.

[0061] FIG. 15 is a schematic diagram of a structure of a communication system 300.

[0062] FIG. 16 is a schematic diagram of an application scenario of an embodiment of the present application. DETAILED DESCRIPTION

[0063] In order to facilitate understanding of the embodiments of the present application, the following points are first explained.

[0064] I. The terms and / or descriptions of different embodiments of the present application are consistent and can be mutually referenced if there is no special description and logical conflict. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0065] II. The various digital numbers involved in the present application are only for differentiation for convenience of description, and are not used to limit the protection scope of the present application. The sequence number size involved in the present application does not mean the execution order, and the execution order of each process should be determined according to its function and inherent logic. For example, the terms “first”, “second”, “third”, “fourth” and other various term labels in the specification and claims and drawings of the present application (if any) are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. Among them, the data thus used can be interchanged under appropriate circumstances, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein.

[0066] At the same time, any embodiment or design scheme described as “exemplarily” or “for example” in the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. On the contrary, the words “exemplarily” or “for example” are intended to present the relevant concept in a specific manner, so as to facilitate understanding.

[0067] III. The terms “include” and “have” and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device containing a series of steps or units does not have to be limited to those clearly listed steps or units, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0068] The communication system and communication method of the embodiments of the present application will be described below with reference to the drawings.

[0069] The communication system and communication method of this application embodiment can be applied to various communication systems, including but not limited to: Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD) system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) system, Wideband Code Division Multiple Access (WCDMA) system, Global System for Mobile Communications (GSM) system, Code Division Multiple Access (CDMA) system, and 5G (5G) system. th Generation 5G communication systems, device-to-device (D2D) systems, vehicle-to-everything (V2X) systems, or future communication networks, etc.

[0070] First, a brief introduction to the terminology used in this application.

[0071] 1. Fiber optic repeater

[0072] A fiber optic repeater mainly consists of near-end equipment, optical fiber, and far-end equipment. Both near-end and far-end equipment include radio frequency modules and optoelectronic modules. The optoelectronic modules can convert optical signals to electrical signals and vice versa.

[0073] The working principle of a fiber optic repeater is as follows: Taking downlink transmission as an example, the wireless signal is coupled out from the base station and enters the near-end device. Through electro-optical conversion, the electrical signal is converted into an optical signal. This optical signal is then input from the near-end device to the optical fiber and transmitted to the far-end device. The far-end device converts the optical signal back into an electrical signal, which is then amplified by the radio frequency module. After amplification, the signal is sent to the transmitting antenna and finally received by the terminal device. Taking uplink transmission as an example, the wireless signal is coupled out from the terminal device and enters the far-end device. Through electro-optical conversion, the electrical signal is converted back into an optical signal. This optical signal is then input from the far-end device to the optical fiber. The near-end device converts the optical signal back into an electrical signal, which is then amplified by the radio frequency module. After amplification, the signal is sent to the return antenna and finally received by the base station.

[0074] FIG. 1 is a structural schematic diagram of an optical fiber repeater 100. As shown in FIG. 1, the optical fiber repeater 100 includes a near-end device, optical fibers, and at least one far-end device (for example, far-end device 1, far-end device 2, and far-end device 3). The near-end device and the far-end device are connected through the optical fibers, for example, the near-end device is connected to the far-end device 1 through the optical fiber 1, the near-end device is connected to the far-end device 2 through the optical fiber 2, and the near-end device is connected to the far-end device 3 through the optical fiber 3. Different far-end devices can be respectively deployed at different locations. Among them, the near-end device is deployed at a location close to a base station, and the far-end device is deployed at a location close to a terminal.

[0075] As known from the background, the existing optical fiber repeater 100 can only support 1T1R transmission of a same-frequency signal, and if multi-T multi-R transmission of the same-frequency signal is required, multiple optical fibers need to be used. However, this will make the cost of the optical fiber repeater 100 higher, for example, a larger number of optical fibers are required. In view of this, the present application provides a communication system and a communication method, which can realize transmission of multiple same-frequency signals at a lower cost. For details, please refer to FIG. 2.

[0076] FIG. 2 is a structural schematic diagram of a communication system 200. As shown in FIG. 2, the communication system 200 includes a module 1 (first module) and a module 2 (second module). The module 1 includes an optoelectronic module 1 (first optoelectronic module), and the module 2 includes an optoelectronic module 2 (second optoelectronic module).

[0077] In the embodiments of the present application, the communication system 200 can be composed of different devices, for example, the module 1 is a near-end device, and the module 2 is a far-end device; or the communication system 200 can be composed of one device, and the module 1 and the module 2 are different components of the device. When the communication system 200 is composed of one device, the communication system 200 can be an optical fiber repeater, a relay device, a terminal, or a network device in wireless fidelity (Wi-Fi), etc.; or the communication system 200 can also represent a device or system for same-frequency signal relay transmission or adjacent-frequency signal relay transmission. In summary, the embodiments of the present application do not limit the form of the communication system 200.

[0078] In the embodiments of the present application, the communication system 200 can be applicable to a downlink scenario, and can also be applicable to an uplink scenario.

[0079] The communication system 200 has two schemes 1 and 2. The schemes 1 and 2 are described below.

[0080] Scheme 1:

[0081] The frequency points of the analog signal 1 (first analog signal) and the analog signal 2 (second analog signal) received by the optoelectronic module 1 are different.

[0082] Implementation scheme 2: the wavelengths of the analog optical signal of the analog signal 1 and the analog optical signal of the analog signal 2 output by the optoelectronic module 1 are different.

[0083] Based on the above two schemes, the embodiments of the present application can support the transmission of multiple same-frequency signals at a lower cost, for example, without the need for more optical fibers and more optoelectronic modules.

[0084] For ease of description, the scheme 1 is described first, and then the scheme 2 is described.

[0085] Scheme 1:

[0086] The optoelectronic module 1 performs electro-optical conversion on the received analog signal 1 and analog signal 2 to obtain the analog optical signal of the analog signal 1 and the analog optical signal of the analog signal 2, and transmits the analog optical signal of the analog signal 1 and the analog optical signal of the analog signal 2 to the optoelectronic module 2 through an analog radio over fiber (A-ROF) optical fiber, the frequency point of the analog signal 1 being different from the frequency point of the analog signal 2. The optoelectronic module 2 performs optical-electric conversion on the analog optical signal of the analog signal 1 and the analog optical signal of the analog signal 2 to obtain the analog signal 1 and the analog signal 2. The frequency point of the air interface signal corresponding to the analog signal 1 can be the same as or different from the frequency point of the air interface signal corresponding to the analog signal 2, which is not limited.

[0087] In scheme 1, since the frequency point of the analog signal 1 is different from the frequency point of the analog signal 2, the mixing phenomenon does not occur between the analog signal 1 and the analog signal 2, so that the analog optical signals of the two analog signals can be transmitted through one optical fiber, and the transmission of multiple same-frequency signals can be realized at a lower cost. In addition, compared with the prior art scheme of transmitting through multiple optical fibers, since the analog optical signals of multiple analog signals are transmitted through one optical fiber, the implementation complexity of the communication system can be reduced.

[0088] In a possible implementation, the module 1 further includes a circuit 1 (first circuit), and the circuit 1 outputs the signal subjected to frequency shift processing to the optoelectronic module 1. The module 2 further includes a circuit 2 (second circuit), and the circuit 2 performs frequency shift processing on the signal output by the optoelectronic module 2. The description of the circuit 1 and the circuit 2 can be referred to FIG. 3.

[0089] FIG. 3 is a structural schematic diagram of the circuit 1 and the circuit 2 according to an embodiment of the present application. As shown in FIG. 3, the output end of the circuit 1 is connected to the input end of the optoelectronic module 1, and the input end of the circuit 2 is connected to the output end of the optoelectronic module 2. In the example shown in FIG. 3, the module 1 includes the circuit 1 and the module 2 includes the circuit 2. However, the module 1 and the module 2 can also include circuits corresponding to the analog signal 2. Details can be found in the description of the circuit 1 and the circuit 2 below, and thus will not be described here.

[0090] The circuit 1 performs signal processing on the input digital signal 1 (first digital signal) to obtain the analog signal 1, and outputs the analog signal 1 to the optoelectronic module 1. The frequency point of the analog signal 1 is different from that of the digital signal 1. The circuit 2 performs signal processing on the input analog signal 1 to obtain the analog signal 3 (third analog signal), and the frequency point of the analog signal 3 is the same as that of the digital signal 1, and the frequency point of the analog signal 3 is different from that of the analog signal 1. The signal processing performed by the circuit 1 on the digital signal 1 includes frequency shift processing, so that the frequency point of the analog signal 1 is different from that of the digital signal 1. The signal processing performed by the circuit 2 on the analog signal 1 includes frequency shift processing, so that the frequency point of the analog signal 3 is different from that of the analog signal 1, and the frequency point of the analog signal 3 is the same as that of the digital signal 1. Through the above structure, the embodiment of the present application can support frequency shift processing on the signal, thereby being able to support transmission of two analog signals through one optical fiber.

[0091] The circuit 1 will be described below in combination with FIG. 4 to FIG. 6.

[0092] FIG. 4 is a structural schematic diagram of the circuit 1 according to an embodiment of the present application. As shown in FIG. 4, the circuit 1 includes a digital-to-analog conversion device (DAC), a power amplifier 1 (first power amplifier), a combiner 1 (first combiner), and a frequency shift device 1 (first frequency shift device).

[0093] The DAC performs digital-to-analog conversion on the digital signal 1 to obtain the analog signal of the digital signal 1, and outputs the analog signal of the digital signal 1 to the power amplifier 1. The power amplifier 1 performs amplification processing on the analog signal of the digital signal 1 to obtain an analog signal 4 (fourth analog signal), and outputs the analog signal 4 to the combiner 1. The combiner 1 performs combining processing on the analog signal 4 and a local oscillation signal 1 (first local oscillation signal) output by the frequency shift device 1, and outputs the analog signal 1 to the optoelectronic module 1. The local oscillation signal 1 is used for frequency shift of the analog signal 4. In this way, this can support output of the analog signal subjected to frequency shift processing to the optoelectronic module.

[0094] In a possible implementation, the frequency shift device can be a circuit in a chip or a local oscillation device, without limitation.

[0095] Figure 5 is a schematic diagram of a structure of the circuit 1 according to an embodiment of the present application. As shown in Figure 5, the circuit 1 comprises a DAC, a power amplifier 1, a combiner 1, and a frequency shifting device 1.

[0096] The DAC converts the digital signal 1 into an analog signal of the digital signal 1, and outputs the analog signal of the digital signal 1 to the combiner 1. The combiner 1 combines the analog signal of the digital signal 1 and the local signal 1 output by the frequency shifting device 1, and outputs an analog signal 5 (fifth analog signal) to the power amplifier 1, the local signal 1 being used for frequency shifting of the analog signal of the digital signal 1, the frequency point of the analog signal 5 being the same as that of the analog signal 1. The power amplifier 1 amplifies the analog signal 5 to obtain the analog signal 1, and outputs the analog signal 1 to the optoelectronic module 1. In this way, this can support outputting the analog signal subjected to frequency shifting to the optoelectronic module.

[0097] Figure 6 is a schematic diagram of a structure of the circuit 1 according to an embodiment of the present application. As shown in Figure 6, the circuit 1 comprises a DAC, a power amplifier 1, a combiner 1, and a frequency shifting device 1.

[0098] The combiner 1 combines the input digital signal 1 and the local signal 1 output by the frequency shifting device 1, and outputs a digital signal 2 (second digital signal) to the DAC, the frequency point of the digital signal 2 being the same as that of the analog signal 1, the local signal 1 being used for frequency shifting of the digital signal 1. The DAC converts the digital signal 2 into an analog signal of the digital signal 2, and outputs the analog signal of the digital signal 2 to the power amplifier 1. The power amplifier 1 amplifies the analog signal of the digital signal 2 to obtain the analog signal 2, and outputs the analog signal 1 to the optoelectronic module 1. In this way, this can support outputting the analog signal subjected to frequency shifting to the optoelectronic module.

[0099] The circuit 2 is described below in combination with Figure 7.

[0100] Figure 7 is a schematic diagram of a structure of the circuit 2 according to an embodiment of the present application. As shown in Figure 7, the circuit 2 comprises a combiner 2 (second combiner) and a frequency shifting device 2 (second frequency shifting device).

[0101] The combiner 2 combines the input analog signal 1 and the local signal 2 (second local signal) output by the frequency shifting device 2, and outputs an analog signal 3, the local signal 2 being used for frequency shifting of the analog signal 1. In this way, this can perform inverse frequency shifting on the analog signal subjected to frequency shifting and output by the optoelectronic module.

[0102] Optionally, the circuit 2 can further comprise a power amplifier or the like, which is not limited in this regard.

[0103] In a possible implementation, the module 1 further comprises a signal processing unit 1 (e.g., a first signal processing unit), and the module 2 further comprises a signal processing unit 2 (e.g., a second signal processing unit). The signal processing unit 1 is configured to output the aforementioned digital signal 1 to the circuit 1, and the signal processing unit 2 is configured to perform signal processing on the analog signal 3 output by the circuit 2 to obtain the air interface signal corresponding to the analog signal 3. For details, refer to FIG. 8.

[0104] FIG. 8 is a schematic diagram of a structure of the communication system 200. As shown in FIG. 8, the module 1 further comprises a signal processing unit 1, and the module 2 further comprises a signal processing unit 2. The signal processing unit 1 performs signal processing on the input air interface signal to obtain the digital signal 1, and outputs the digital signal 1 to the circuit 1. The signal processing unit 2 performs signal processing on the analog signal 3 output by the circuit 2 to obtain the air interface signal corresponding to the analog signal 3, and outputs the air interface signal corresponding to the analog signal 3. In this way, the processing of the air interface signal can be implemented. In addition, the processing of the signal can be supported.

[0105] In a possible implementation, the module 1 further comprises a signal processing unit 3 (e.g., a third signal processing unit), and the signal processing unit is configured to output a signal used to cancel the air interface signal output by the communication system 200. For details, refer to FIG. 9.

[0106] FIG. 9 is a schematic diagram of a structure of the communication system 200. As shown in FIG. 9, the module 1 comprises an antenna 1 (which can be a backhaul antenna or an access antenna), a combiner 3 (a third combiner), a signal processing unit 1, a circuit 1, an optoelectronic module 1, a signal processing unit 3, the module 2 comprises an optoelectronic module 2, a circuit 2, a signal processing unit 2, and an antenna 2 (which can be an access antenna or a backhaul antenna).

[0107] The combiner 3 comprises an input port 1, an input port 2, and an output port 3. The input port 1 is connected to the antenna 1, and is configured to input the signal received by the antenna 1, such as the analog signal 6 (a sixth analog signal) and the analog signal 8 (an eighth analog signal) shown below. The input port 2 is connected to the signal processing unit 3, and is configured to input the signal output by the signal processing unit 3, such as the analog signal 9 (a ninth analog signal) shown below. The output port 3 is connected to the input port of the signal processing unit 1, and is configured to output the signal subjected to the combining processing to the signal processing unit 1. The output port of the signal processing unit 1 is connected to the input port of the signal processing unit 3 and the input port of the circuit 1. The output port of the signal processing unit 2 is connected to the antenna 2, and the antenna 2 is configured to transmit the signal output by the signal processing unit 2, such as the analog signal 12. The module signal 6 is a signal obtained based on the analog signal 12.

[0108] It can be understood that the schematic diagram shown in FIG. 9 is only used as an example for understanding, and is not used as a final limitation.

[0109] The signal processing unit 3 can output a cancellation signal for cancelling the signal transmitted by the antenna 2.

[0110] In one example, the signal processing unit 1 performs signal processing (e.g., digital filtering, gain control, etc.) on the analog signal 8 input to the combiner 3 (the analog signal 8 is transmitted by the base station) and outputs a digital signal 1, and the analog signal 6 is a signal processed from the analog signal 8 and finally output. The signal processing unit 3 performs signal processing (e.g., digital filtering, gain control, etc.) on the digital signal 1 output by the signal processing unit 1 to obtain an analog signal 9. The analog signal 9 is a quadrature signal of the analog signal 6, and the analog signal 6 is a signal transmitted over the air. The analog signal 9 is the aforementioned cancellation signal, and the analog signal 9 is used to cancel the analog signal 6. The transmission time of the analog signal 8 corresponding to the analog signal 6 is before the transmission time of the analog signal 7 (the analog signal 7 is transmitted by the base station to the communication device).

[0111] In the embodiments of the present application, the quadrature can be that the phase difference between the two signals is 180°, for example, the phase difference between the phase of the analog signal 9 and the phase of the analog signal 6 is 180°. In addition, the amplitude of the analog signal 9 can be the same as the amplitude of the analog signal 6, that is, the analog signal 9 is an equal-amplitude quadrature signal of the analog signal 6; the amplitude of the analog signal 9 can be different from the amplitude of the analog signal 6, that is, the analog signal 9 is a non-equal-amplitude but quadrature signal of the analog signal 6. In this way, it can reduce the transmission interference of the analog signal 6 on the signal received by the antenna 1.

[0112] For example, the antenna 2 transmits the analog signal 6 at time T2, the analog signal 6 is a signal obtained based on the analog signal 12, the base station transmits the analog signal 7 to the antenna 1 at time T3, the input port 1 of the combiner 3 receives the analog signal 6 and the analog signal 7, the time T2 is before the time T3, and the input port 2 of the combiner 3 receives the analog signal 9. The analog signal 6 is a signal obtained by the signal processing unit 2 based on the analog signal 8. The analog signal 9 is a signal obtained by the signal processing unit 3 by performing signal processing (e.g., digital filtering, gain control, etc.) on the digital signal 1. The combiner 3 can output (analog signal 6 + analog signal 7 + analog signal 9) to the signal processing unit 1. When the analog signal 9 can completely cancel the analog signal 6, the signal output by the combiner 3 to the signal processing unit 1 is the analog signal 7. When the analog signal 9 partially cancels the analog signal 6, the signal output by the combiner 3 to the signal processing unit 1 is: analog signal 7 + signal Δ1 (signal Δ1 = difference between analog signal 6 and analog signal 9). In the above two cases, the interference of the analog signal 6 on the analog signal 7 can be reduced.

[0113] Through the above structure, when the combiner 3 receives the analog signal 6, the analog signal 7 and the analog signal 9, the combiner 3 can use the analog signal 9 to perform the cancellation processing on the analog signal 6, thereby being able to reduce the transmission interference of the analog signal 6 on the analog signal 7, and further being able to improve the anti-self-excitation interference capability of the communication system.

[0114] In summary, through the setting of the signal processing unit 3, the signal transmitted by the communication system at the previous time (such as the transmission time of the analog signal 6) will not cause the transmission interference on the signal received by the communication system at the next time (such as the reception time of the analog signal 7), and further being able to improve the anti-self-excitation interference capability of the communication system.

[0115] In a possible implementation manner, the signal processing unit 1 can include an adaptive filter and a DAC and the like device or module.

[0116] In a possible implementation manner, the signal processing unit 3 can include an ADC, a gain control device and a signal delay device and the like device.

[0117] In a possible implementation manner, the signal processing unit 2 can include a DAC, a small signal amplifier device, a power amplifier and a signal delay device and the like device.

[0118] In a possible implementation manner, the signal processing unit 3 can further include a signal delay unit, and the input port of the signal delay unit is connected with the output port of the signal processing unit 1. The signal delay unit can be used for performing the delay processing on the input signal. In this way, the time when the analog signal 9 reaches the input port 2 of the combiner 3 is consistent with the time when the analog signal 6 reaches the input port 1 of the combiner 3, and further being able to support the time delay alignment of the analog signal 9 and the analog signal 6. In summary, through the signal delay unit, this can support the enhancement of the cancellation effect of the analog signal 9 on the analog signal 6.

[0119] In a possible implementation manner, the module 1 further includes a signal processing unit 4 (a fourth signal processing unit), and the signal processing unit 4 is used for outputting the signal used for canceling the noise signal. For details, refer to the description of FIG. 10.

[0120] FIG. 10 is a structural schematic diagram of the communication system 200. As shown in FIG. 10, the module 1 includes: an antenna 1, a combiner 3, a signal processing unit 1, a signal processing unit 3, a circuit 1, an optoelectronic module 1, a signal processing unit 4, a frequency shift device 3 (a third frequency shift device) and a combiner 4 (a fourth combiner), and the module 2 includes: an optoelectronic module 2, a circuit 2, a signal processing unit 2, a frequency shift device 4 (a fourth frequency shift device), a combiner 5 (a fifth combiner), a combiner 6 (a sixth combiner) and an antenna 2.

[0121] The input port of the signal processing unit 4 is connected with the output port of the signal processing unit 1, the input port of the combiner 4 and the output port of the signal processing unit 4 and the output port of the frequency shifting device 3 are connected, the output port of the combiner 4 and the input port of the optoelectronic module 1 are connected, the input port of the combiner 5 and the output port of the optoelectronic module 2 and the output port of the frequency shifting device 4 are connected, the output port of the combiner 5 and the input port of the combiner 6 are connected, and the input port of the combiner 6 is also connected with the output port of the signal processing unit 2.

[0122] The signal processing unit 4 performs signal processing on the digital signal 1 and outputs the heterodyne signal of the noise signal, which is formed when the digital signal 1 is signal amplified. The description about the relationship between the heterodyne signal of the noise signal and the noise signal can refer to the foregoing description about the relationship between the analog signal 9 and the analog signal 6, which will not be described herein.

[0123] The combiner 4 performs combing processing on the heterodyne signal of the noise signal and the local oscillator signal 3 (the third local oscillator signal) output by the frequency shifting device, and outputs the analog signal 10 (the tenth analog signal) to the optoelectronic module 1, the local oscillator signal 3 is used for frequency shifting the heterodyne signal of the noise signal, and the frequency point of the analog signal 10 is the same as that of the analog signal 1.

[0124] The optoelectronic module 1 performs photoelectric conversion on the analog signal 10 to obtain the analog optical signal of the analog signal 10, and transmits the analog signal 10 to the optoelectronic module 2 through an A-ROF optical fiber.

[0125] The optoelectronic module 2 performs electro-optical conversion on the analog optical signal of the analog signal 10 to obtain the analog signal 10, and outputs the analog signal 10 to the combiner 5.

[0126] The combiner 5 performs combing processing on the analog signal 10 and the local oscillator signal 4 (the fourth local oscillator signal) output by the frequency shifting device 4, and outputs the analog signal 11 (the eleventh analog signal) to the combiner 6, the local oscillator signal 4 is used for frequency shifting the analog signal 10, and the frequency point of the analog signal 11 is the same as that of the analog signal 3.

[0127] The combiner 6 performs combing processing on the analog signal 11 and the analog signal 12, and outputs the signal obtained by the combing processing, the analog signal 12 is the signal obtained by the signal processing unit 4 performing signal processing on the analog signal 3, and the analog signal 12 includes the noise signal.

[0128] In summary, through the signal processing unit 4, this can support the anti-noise interference capability of the enhanced communication system.

[0129] The specific structure of the communication system 200 will be described below with reference to FIG. 11.

[0130] Fig. 11 is another schematic diagram of the communication system 200 according to an embodiment of the present application. As shown in Fig. 11, the module 1 includes the antenna 1, a power amplifier, an ADC, a signal processor, a circuit 1, and an optoelectronic module 1, and the module 2 includes an optoelectronic module 2, a circuit 2, a power amplifier, a circulator, and an antenna 2. The antenna 1 can be a backhaul antenna, and the antenna 2 can be an access antenna, or the antenna 1 can be an access antenna, and the antenna 2 can be a backhaul antenna.

[0131] In Fig. 11, the input end of the power amplifier in the module 1 is connected to the antenna 1, the output end of the power amplifier is connected to the input end of the ADC, the output end of the ADC is connected to the input end of the signal processor, the output end of the signal processor is connected to the input end of the circuit 1, and the output end of the circuit 1 is connected to the input end of the optoelectronic module 1. The signal processing unit 1 can include the power amplifier, the ADC, and the signal processor as described above. Optionally, the signal processing unit 1 can further include a filter, the input end of the filter is connected to the antenna 1, and the output end of the filter is connected to the power amplifier.

[0132] In Fig. 11, the output end of the circuit 2 in the module 2 is connected to the input end of the power amplifier, the output end of the power amplifier is connected to the circulator, and the output end of the circulator is connected to the antenna 2. The signal processing unit 2 can include the power amplifier and the circulator as described above. Optionally, the signal processing unit 2 can further include a filter, the input end of the filter is connected to the output end of the circulator, and the output end of the filter is connected to the antenna 2.

[0133] In the scheme 1, the optoelectronic module 1 and the optoelectronic module 2 can be deployed in an integrated manner, i.e., multiple devices can be integrated together. In the scheme 1, the optoelectronic module 1 and the optoelectronic module 2 can also be deployed in a non-integrated manner.

[0134] In a possible implementation, the optoelectronic module 1 includes an optoelectronic module 1 (first optoelectronic module) and an optoelectronic module 2 (second optoelectronic module).

[0135] For example, the photoelectric unit 1 performs electro-optical conversion on the analog signal 1 to obtain an analog optical signal of the analog signal 1, and can directly output the analog optical signal of the analog signal 1 to the A-ROF optical fiber or output the analog optical signal of the analog signal 1 to the A-ROF optical fiber through the wavelength division multiplexing unit 1. The photoelectric unit 2 performs electro-optical conversion on the analog signal 2 to obtain an analog optical signal of the analog signal 2, and can directly output the analog optical signal of the analog signal 2 to the A-ROF optical fiber or output the analog optical signal of the analog signal 2 to the A-ROF optical fiber through the wavelength division multiplexing unit 1. In this way, this can support one photoelectric unit corresponding to the electro-optical conversion of one analog signal, so as to optimize the structural design of the optoelectronic module, for example, which can facilitate the management and maintenance of the photoelectric unit.

[0136] In one possible implementation, the optoelectronic module 1 can also include the wavelength division multiplexing unit 1 described above. The wavelength division multiplexing unit 1 is used to combine the analog optical signals output by the photoelectric unit 1 and the photoelectric unit 2. The output end of the wavelength division multiplexing unit 1 is connected to the A-ROF optical fiber described above.

[0137] In one possible implementation, the optoelectronic module 2 includes a photoelectric unit 3 (third photoelectric unit) and a photoelectric unit 4 (fourth photoelectric unit).

[0138] For example, the photoelectric unit 3 can perform photoelectric conversion on the analog optical signal of the analog signal 1 received through the A-ROF optical fiber or through the wavelength division multiplexing unit 2 to obtain the analog signal 1, and the photoelectric unit 4 can perform photoelectric conversion on the analog optical signal of the analog signal 2 received through the A-ROF optical fiber or through the wavelength division multiplexing unit 2 to obtain the analog signal 2. In this way, this can support one photoelectric unit corresponding to the photoelectric conversion of one analog signal, so as to optimize the structural design of the optoelectronic module, for example, which can facilitate the management and maintenance of the photoelectric unit.

[0139] In one possible implementation, the optoelectronic module 2 can also include the wavelength division multiplexing unit 2 described above. The wavelength division multiplexing unit 2 performs splitting processing on the received analog optical signal, and sends the analog optical signal of the analog signal 1 and the analog optical signal of the analog signal 2 to the photoelectric unit 3 and the photoelectric unit 4, respectively. The input end of the wavelength division multiplexing unit 2 is connected to the A-ROF optical fiber described above.

[0140] In scheme 1, in one possible implementation, the wavelength of the analog optical signal of the analog signal 1 can be the same as the wavelength of the analog optical signal of the analog signal 2. In this way, this does not need to perform wavelength shifting processing on the analog optical signal of the analog signal, so as to reduce the complexity of the communication system 200. FIG. 3 to FIG. 11 are described taking scheme 1 as an example. The following describes scheme 2.

[0141] Scheme 2: The optoelectronic module 1 performs electro-optical conversion and wavelength shifting processing on the received analog signal 1 and analog signal 2 to obtain an analog optical signal of the analog signal 1 and an analog optical signal of the analog signal 2, the wavelength of the analog optical signal of the analog signal 1 is different from the wavelength of the analog optical signal of the analog signal 2, and the analog optical signal of the analog signal 1 and the analog optical signal of the analog signal 2 are output to the optoelectronic module 2 through an A-ROF optical fiber. The optoelectronic module 2 can perform optical-electric conversion and wavelength shifting processing on the analog optical signal of the analog signal 1 and the analog optical signal of the analog signal 2 to obtain the analog signal 1 and the analog signal 2. Wherein, the frequency point of the air interface signal corresponding to the analog signal 1 can be the same as the frequency point of the air interface signal corresponding to the analog signal 2, or can be different from the frequency point of the air interface signal corresponding to the analog signal 2, which is not limited.

[0142] Wherein, the wavelength shifting processing can be understood as: modulating the wavelength of the analog optical signal of the analog signal, so that the wavelength of the analog optical signal of the analog signal changes. Wherein, the embodiment of the present application does not limit the execution order of the wavelength shifting processing, for example, the wavelength shifting processing can be realized at the same time in the process of electro-optical conversion, or the wavelength shifting processing is performed after the electro-optical conversion is performed, which is not limited.

[0143] In scheme 2, there are two cases for the relationship between the frequency point of the analog signal 1 and the frequency point of the analog signal 2.

[0144] The first case:

[0145] The frequency point of the analog signal 1 is different from the frequency point of the analog signal 2. In this way, the communication system 200 in scheme 2 can also include part or all of the structures included in the communication system 200 in the foregoing scheme 1.

[0146] In the first case, the communication system 200 in scheme 2 can also include the circuit 1 shown in FIGS. 3-6.

[0147] In the first case, the communication system 200 in scheme 2 can also include the circuit 1 shown in FIGS. 3-6 and the circuit 2 shown in FIG. 7.

[0148] In the first case, the communication system 200 in scheme 2 can also include the circuit 1 shown in FIGS. 3-6, the circuit 2 shown in FIG. 7, and the signal processing unit 1 and the signal processing unit 2 shown in FIG. 8.

[0149] In the first case, the communication system 200 in scheme 2 can also include the circuit 1 shown in FIGS. 3-6, the circuit 2 shown in FIG. 7, the signal processing unit 1 and the signal processing unit 2 shown in FIG. 8, and the signal processing unit 3 and the combiner 3 shown in FIG. 9.

[0150] In the first case, the communication system 200 in the scheme 2 can further include the circuit 1 shown in FIGS. 3-6, the circuit 2 shown in FIG. 7, the signal processing units 1 and 2 shown in FIG. 8, the signal processing unit 3 and the combiner 3 shown in FIG. 9, and the signal processing unit 4, the frequency shifting device 3, the combiner 4, the frequency shifting device 4, the combiner 5, and the combiner 6 shown in FIG. 10.

[0151] In the first case, the communication system 200 in the scheme 2 can further include the circuit 1 shown in FIGS. 3-6, the circuit 2 shown in FIG. 7, the signal processing units 1 and 2 shown in FIG. 8, the signal processing unit 3 and the combiner 3 shown in FIG. 9, and the signal processing unit 4, the frequency shifting device 3, the combiner 4, the frequency shifting device 4, the combiner 5, and the combiner 6 shown in FIG. 10.

[0152] The second case:

[0153] The frequency point of the analog signal 1 is the same as that of the analog signal 2. Thus, the communication system 200 in the scheme 2 can include the parts included in the communication system 200 in the scheme 1.

[0154] In the second case, the communication system 200 in the scheme 2 can further include the circuit 1, which includes a DAC and a power amplifier. The description of the circuit 1 can be referred to FIG. 12.

[0155] FIG. 12 is a schematic diagram of a structure of the circuit 1. As shown in FIG. 12, the DAC performs digital-to-analog conversion on the digital signal 1 to obtain an analog signal of the digital signal 1, and outputs the analog signal of the digital signal 1 to the power amplifier. The power amplifier performs amplification processing on the analog signal of the digital signal 1 to obtain the analog signal 1, and outputs the analog signal 1 to the optoelectronic module 1.

[0156] In the second case, the communication system 200 in the scheme 2 can further include the circuit 1 and the circuit 2. The input end of the circuit 2 is connected to the output end of the optoelectronic module 2. In a possible implementation, the circuit 2 can include a power amplifier and the like.

[0157] In the second case, the communication system 200 in the scheme 2 can further include the circuit 1, the circuit 2, and the signal processing units 1 and 2 shown in FIG. 8. The output end of the signal processing unit 1 is connected to the input end of the circuit 1, and the input end of the signal processing unit 2 is connected to the output end of the circuit 2.

[0158] In the second case, the communication system 200 in the scheme 2 can further include the circuit 1, the circuit 2, and the signal processing unit 1, the signal processing unit 2, the signal processing unit 3, and the combiner 3 shown in FIG. 9, exemplarily. The description about the connection between the circuit 1, the circuit 2, the signal processing unit 1, the signal processing unit 2, the signal processing unit 3, and the combiner 3 can refer to the description of FIG. 9.

[0159] In the second case, the communication system 200 in the scheme 2 can further include the circuit 1, the circuit 2, and the signal processing unit 1, the signal processing unit 2, the signal processing unit 3, the combiner 3, the signal processing unit 4, and the combiner 6 shown in FIG. 10, exemplarily. The description about the connection between the circuit 1, the circuit 2, the signal processing unit 1, the signal processing unit 2, the signal processing unit 3, the signal processing unit 4, the combiner 3, and the combiner 6 can refer to the description of FIG. 10. In addition, the output end of the signal processing unit 4 is connected with the input end of the optoelectronic module 1. One input end of the combiner 6 is connected with the output end of the optoelectronic module 2, and the other input end of the combiner 6 is connected with the output end of the signal processing unit 2.

[0160] In the second case, the communication system 200 in the scheme 2 can further include the circuit 1, the circuit 2, and the power amplifier 1, the ADC, the signal processor, the power amplifier 2, and the circulator shown in FIG. 11, exemplarily. The description about the connection between the circuit 1, the circuit 2, the power amplifier 1, the ADC, the signal processor, the power amplifier 2, and the circulator can refer to the description of FIG. 11.

[0161] It is uniformly stated that the above description about the structure of the communication system 200 in the scheme 2 is only as an example, and in the specific application, it can be designed according to the actual needs.

[0162] In the scheme 2, the optoelectronic module 1 and the optoelectronic module 2 can be deployed in an integrated manner, that is, a plurality of devices can be integrated together. In the scheme 2, the optoelectronic module 1 and the optoelectronic module 2 can also be deployed in a non-integrated manner.

[0163] In a possible implementation of the scheme 2, the optoelectronic module 1 includes the optoelectronic unit 1 and the optoelectronic unit 2. For example, the optoelectronic unit 1 performs the electro-optical conversion and the wavelength shifting on the analog signal 1 to obtain the analog optical signal of the analog signal 1, and outputs the analog optical signal of the analog signal 1 to the A-ROF fiber directly or through the wavelength division multiplexing unit 1. The optoelectronic unit 2 performs the electro-optical conversion and the wavelength shifting on the analog signal 2 to obtain the analog optical signal of the analog signal 2, and outputs the analog optical signal of the analog signal 2 to the A-ROF fiber directly or through the wavelength division multiplexing unit 1. This can support one optoelectronic unit corresponding to the electro-optical conversion of one analog signal, thereby optimizing the structural design of the optoelectronic module, for example, facilitating the management and maintenance of the optoelectronic unit.

[0164] In a possible implementation of the scheme 2, the wavelength division multiplexing unit 1 can be integrated in the optoelectronic module 1. The description of the function of the wavelength division multiplexing unit 1 can be referred to the foregoing description.

[0165] In a possible implementation of the scheme 2, the optoelectronic module 2 includes the optoelectronic unit 3 and the optoelectronic unit 4. For example, the optoelectronic unit 3 performs the electro-optical conversion and the wavelength shifting on the analog optical signal of the analog signal 1 received through the A-ROF fiber or through the wavelength division multiplexing unit 2 to obtain the analog signal 1, and the optoelectronic unit 4 performs the electro-optical conversion and the wavelength shifting on the analog optical signal of the analog signal 2 received through the A-ROF fiber or through the wavelength division multiplexing unit 2 to obtain the analog signal 2. This can support one optoelectronic unit corresponding to the electro-optical conversion of one analog signal, thereby optimizing the structural design of the optoelectronic module, for example, facilitating the management and maintenance of the optoelectronic unit.

[0166] In a possible implementation of the scheme 2, the wavelength division multiplexing unit 1 can be integrated in the optoelectronic module 2. The description of the function of the wavelength division multiplexing unit 2 can be referred to the foregoing description.

[0167] The communication method of the embodiment of the present application is described below in combination with FIG. 13 and FIG. 14.

[0168] FIG. 13 is an interaction flow diagram of a communication method of an embodiment of the present application. The method shown in FIG. 13 can be applied to the scheme 1. As shown in FIG. 13, the method includes:

[0169] S1301, the optoelectronic module 1 performs the electro-optical conversion on the received analog signal 1 and the analog signal 2 respectively to obtain the analog optical signal of the analog signal 1 and the analog optical signal of the analog signal 2.

[0170] S1302, the optoelectronic module 1 outputs the analog optical signal of the analog signal 1 and the analog optical signal of the analog signal 2 to the optoelectronic module 2 through an A-ROF optical fiber.

[0171] S1303, the optoelectronic module 2 respectively performs electro-optical conversion on the received analog optical signal of the analog signal 1 and the analog optical signal of the analog signal 2, to obtain the analog signal 1 and the analog signal 2.

[0172] Through the above method, the transmission of multiple same-frequency signals can be realized at a lower cost.

[0173] Optionally, the method further comprises:

[0174] S1301a, the circuit 1 performs signal processing on the input digital signal 1 to obtain the analog signal 1.

[0175] S1301b, the circuit 1 outputs the analog signal 1 to the optoelectronic module 1, and the frequency point of the analog signal 1 is different from the frequency point of the digital signal 1.

[0176] For the description of the circuit 1 performing signal processing on the digital signal 1 to obtain the analog signal 1, please refer to the foregoing description, which will not be repeated here.

[0177] Optionally, the method further comprises:

[0178] S1303a, the circuit 2 performs signal processing on the input analog signal 1 to obtain the analog signal 3, and the frequency point of the analog signal 3 is the same as that of the digital signal 1, and the frequency point of the analog signal 3 is different from that of the analog signal 1.

[0179] For the description of the circuit 2 performing signal processing on the analog signal 1 to obtain the analog signal 3, please refer to the foregoing description, which will not be repeated here.

[0180] Optionally, the method further comprises:

[0181] S1304, the signal processing unit 1 performs signal processing on the analog signal 8 input by the combiner 3 to obtain the digital signal 1, and outputs the digital signal 1, and the analog signal 6 is a signal obtained based on the analog signal 3.

[0182] S1305, the signal processing unit 3 performs signal processing on the digital signal 1 and outputs the analog signal 9.

[0183] S1306, the combiner 3 performs combiner processing on the input analog signal 6, analog signal 7 and analog signal 9, and outputs the signal obtained by the combiner processing.

[0184] Through the above method, the communication system can improve the ability to resist self-excitation interference.

[0185] Optionally, the method further comprises:

[0186] S1307, the signal processing unit 4 performs signal processing on the digital signal 1 and outputs the heterodyne signal of the noise signal.

[0187] S1308, the combiner 4 performs combiner processing on the heterodyne signal of the noise signal and the local oscillator signal 3 output by the frequency shifting device 3, and outputs the analog signal 10 to the optoelectronic module 1.

[0188] S1309, the optoelectronic module 1 performs photoelectric conversion on the analog signal 10 to obtain the analog optical signal of the analog signal 10, and transmits the analog signal 10 to the optoelectronic module 2 through an analog optical wireless communication.

[0189] S1310, the optoelectronic module 2 performs electro-optical conversion on the analog optical signal of the analog signal 10 to obtain the analog signal 10, and outputs the analog signal 10 to the combiner 5;

[0190] S1311, the combiner 5 performs combiner processing on the analog signal 10 and the local oscillator signal 4 output by the frequency shifting device 4, and outputs the analog signal 11 to the combiner 6.

[0191] S1312, the combiner 6 performs combiner processing on the analog signal 11 and the analog signal 12, and outputs the signal obtained by the combiner processing, the analog signal 12 being the signal obtained by the signal processing unit 4 performing signal processing on the analog signal 3, the analog signal 12 including the noise signal.

[0192] Through the above method, the interference of the noise signal can be reduced.

[0193] In addition, the execution order of the above steps is not limited by the embodiments of the present application.

[0194] FIG. 14 is an interactive flow diagram of another communication method according to an embodiment of the present application. The method shown in FIG. 14 can be applied to scheme 2. As shown in FIG. 14, the method comprises:

[0195] S1401, the optoelectronic module 1 performs photoelectric conversion and wavelength shifting processing on the received analog signal 1 and analog signal 2 to obtain the analog optical signal of the analog signal 1 and the analog optical signal of the analog signal 2.

[0196] The wavelength of the analog optical signal of the analog signal 1 is different from the wavelength of the analog optical signal of the analog signal 2.

[0197] S1402, the optoelectronic module 1 outputs the analog optical signal of the analog signal 1 and the analog optical signal of the analog signal 2 to the optoelectronic module 2 through an A-ROF optical fiber.

[0198] S1403, the optoelectronic module 2 performs electro-optical conversion on the received analog optical signal of the analog signal 1 and the analog optical signal of the analog signal 2, to obtain the analog signal 1 and the analog signal 2.

[0199] By the above method, this can support the transmission of multiple same-frequency signals at a lower cost.

[0200] Optionally, the method further comprises:

[0201] S1401a, the circuit 1 performs signal processing on the input digital signal 1 to obtain the analog signal 1.

[0202] S1401b, the circuit 1 outputs the analog signal 1 to the optoelectronic module 1, and the frequency point of the analog signal 1 is the same as that of the digital signal 1.

[0203] For the description of the circuit 1 performing signal processing on the digital signal 1 to obtain the analog signal 1, please refer to the foregoing description, which will not be repeated here.

[0204] Optionally, the method further comprises:

[0205] S1403a, the circuit 2 performs signal processing on the input analog signal 1 to obtain the analog signal 3, and the frequency point of the analog signal 3 is the same as that of the digital signal 1.

[0206] For the description of the circuit 2 performing signal processing on the analog signal 1 to obtain the analog signal 3, please refer to the foregoing description, which will not be repeated here.

[0207] Optionally, the method further comprises:

[0208] S1404, the signal processing unit 1 performs signal processing on the analog signal 15 (such as the fifteenth analog signal) input by the combiner 1 to obtain the digital signal 1, and outputs the digital signal 1.

[0209] S1405, the signal processing unit 3 performs signal processing on the digital signal 1 and outputs the analog signal 16 (such as the sixteenth analog signal).

[0210] S1406, the combiner 1 performs combining processing on the input analog signal 13 (such as the thirteenth analog signal), the analog signal 14 (such as the fourteenth analog signal), and the analog signal 16, and outputs the signal obtained by the combining processing.

[0211] The receiving time of the analog signal 14 is after the receiving time of the analog signal 15, the analog signal 13 is a signal obtained by performing signal processing on the analog signal 15 and finally outputting, the analog signal 13 is a signal obtained based on the analog signal 3, and the analog signal 16 is the quadrature signal of the analog signal 13.

[0212] Through the method, the anti-self-excitation interference capability of the communication system can be improved.

[0213] Optionally, the method further comprises:

[0214] S1407, the signal processing unit 4 performs signal processing on the digital signal 1 and outputs the heterodyne signal of the noise signal to the optoelectronic module 1.

[0215] S1408, the optoelectronic module 1 performs electro-optical conversion and wavelength shift processing on the heterodyne signal of the noise signal to obtain the analog optical signal of the heterodyne signal of the noise signal, and transmits the analog optical signal of the heterodyne signal of the noise signal to the optoelectronic module 2 through an analog optical wireless communication.

[0216] S1409, the optoelectronic module 2 performs wavelength shift processing and photoelectric conversion on the analog optical signal of the heterodyne signal of the noise signal to obtain the heterodyne signal of the noise signal, and outputs the heterodyne signal of the noise signal to the combiner 2.

[0217] S1410, the combiner 2 performs combining processing on the heterodyne signal of the noise signal and the analog signal 17 (such as the seventeenth analog signal), and outputs the signal obtained through the combining processing, the analog signal 17 being a signal obtained through signal processing on the analog signal 3 by the signal processing unit 4, and the analog signal 17 including the noise signal.

[0218] Through the method, the interference of the noise signal can be reduced.

[0219] Optionally, the method does not limit the execution order of the above steps.

[0220] In addition, when the frequency point of the analog signal 1 in the scheme 2 is different from the frequency point of the analog signal 2, the method shown in FIG. 14 can further include the method related to the frequency shift processing shown in FIG. 13.

[0221] FIG. 15 is a structural schematic diagram of a communication system 300. As shown in FIG. 15, the communication system 300 includes the communication system 200 and a base station. The communication system 200 is used to transmit signals sent from the base station. For example, the analog signal 1 and the analog signal 2 are obtained by the communication system 200 according to the signals sent from the base station.

[0222] Optionally, the communication system 200 can also be used to transmit signals sent from a terminal.

[0223] In addition, the application further provides a schematic diagram of an application scenario, which can be referred to FIG. 16.

[0224] Fig. 16 is a schematic diagram of an application scenario of the embodiment of the present application. As shown in Fig. 16, the near-end device is connected with the remote device 1 through an A-ROF optical fiber, and the remote device 1 and the remote device 2 are also connected through an A-ROF optical fiber. The near-end device is connected with a base station. The near-end device can be understood as the module 1, and the remote device 1 and the remote device 2 can be understood as the module 2. In this way, the long-distance transmission of multiple same-frequency signals can be realized.

[0225] The near-end device, the remote device 1 and the remote device 2 shown in Fig. 16 can also adopt the structure shown in Fig. 10 or Fig. 11, which can enhance the anti-self-excitation interference capability or the anti-noise interference capability of the near-end device, the remote device 1 and the remote device 2 shown in Fig. 16.

[0226] Those skilled in the art can understand that the units of the examples described in combination with the embodiments disclosed herein can be realized in electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software mode depends on the specific application and design constraints of the technical solution. The skilled person can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0227] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be described here.

[0228] In the embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the base station device embodiments described above are only schematic, for example, the division of the modules is only a logical function division, and actual implementation can have another division manner, for example, a plurality of modules or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the shown or discussed mutual elements can be indirect coupling or communication connection through some interfaces, devices or modules, and can be electrical, mechanical or other forms.

[0229] The modules described as separate components can or can not be physically separate, and the components shown as modules can or can not be physical modules, i.e., can be located in one place, or can be distributed on a plurality of network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the embodiment.

[0230] In addition, each function module in the embodiments of the present application can be integrated in one processing unit, or each module can exist physically, or two or more modules can be integrated in one module.

[0231] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A communication system, characterized by The application relates to a module for transmitting analog signals, comprising: a first module and a second module, wherein the first module comprises a first optoelectronic module, and the second module comprises a second optoelectronic module; the first optoelectronic module is used for electric-optical conversion of received first analog signals and second analog signals to obtain analog optical signals of the first analog signals and analog optical signals of the second analog signals, and outputs the analog optical signals of the first analog signals and the analog optical signals of the second analog signals to the second optoelectronic module through an analog optical wireless communication optical fiber, wherein the frequency points of the first analog signals are different from the frequency points of the second analog signals; the second optoelectronic module is used for photoelectric conversion of the analog optical signals of the first analog signals and the analog optical signals of the second analog signals to obtain the first analog signals and the second analog signals.

2. The communication system of claim 1, wherein, The first module further comprises a first circuit, and the second module further comprises a second circuit, wherein the output end of the first circuit is connected with the input end of the first optoelectronic module, and the output end of the second optoelectronic module is connected with the input end of the second circuit; the first circuit is used for signal processing of input first digital signals to obtain the first analog signals, and outputs the first analog signals to the first optoelectronic module, wherein the frequency points of the first analog signals are different from the frequency points of the first digital signals; the second circuit is used for signal processing of input first analog signals to obtain third analog signals, wherein the frequency points of the third analog signals are the same as the frequency points of the first digital signals.

3. The communication system of claim 2, wherein, The first circuit comprises a digital-analog conversion device, a first power amplifier, a first frequency shift device and a first combiner; the digital-analog conversion device is used for digital-analog conversion of input first digital signals to obtain analog signals of the first digital signals, and outputs the analog signals of the first digital signals to the first power amplifier; the first power amplifier is used for amplification processing of the analog signals of the first digital signals to obtain fourth analog signals, and outputs the fourth analog signals to the first combiner; the first combiner is used for combiner processing of the fourth analog signals and a first local oscillator signal output by the first frequency shift device, and outputs the first analog signals to the first optoelectronic module, wherein the first local oscillator signal is used for frequency shift of the fourth analog signals.

4. The communication system of claim 2, wherein The first circuit comprises a digital-analog conversion device, a first combiner, a first frequency shift device and a first power amplifier; the digital-analog conversion device is used for digital-analog conversion of input first digital signals to obtain analog signals of the first digital signals, and outputs the analog signals of the first digital signals to the first combiner; the first combiner is used for combiner processing of the analog signals of the first digital signals and a first local oscillator signal output by the first frequency shift device, and outputs fifth analog signals to the first power amplifier, wherein the first local oscillator signal is used for frequency shift of the analog signals of the first digital signals, and the frequency points of the fifth analog signals are the same as the frequency points of the first analog signals; The first power amplifier is configured to amplify the fifth analog signal to obtain the first analog signal, and output the first analog signal to the first optoelectronic module.

5. The communication system of claim 2, wherein, The first circuit comprises a first combiner, a first frequency shift device, a digital-to-analog conversion device, and a first power amplifier. The first combiner is configured to combine the first digital signal and a first local oscillator signal output by the first frequency shift device, and output a second digital signal to the digital-to-analog conversion device, the frequency point of the second digital signal being the same as that of the first analog signal, and the first local oscillator signal being used for frequency shifting of the first digital signal. The digital-to-analog conversion device is configured to convert the second digital signal to an analog signal of the second digital signal, and output the analog signal of the second digital signal to the first power amplifier. The first power amplifier is configured to amplify the analog signal of the second digital signal to obtain the first analog signal, and output the first analog signal to the first optoelectronic module.

6. The communication system of any one of claims 2 to 5, characterized in that, The second circuit comprises: a second combiner and a second frequency shift device; The second combiner is configured to combine the first analog signal and a second local oscillator signal output by the second frequency shift device, and output the third analog signal, the second local oscillator signal being used for frequency shifting of the first analog signal.

7. The communication system according to any one of claims 2 to 6, characterized by, The first module further comprises a first signal processing unit, and the second module further comprises a second signal processing unit; The first signal processing unit is configured to process an input air interface signal to obtain the first digital signal, and output the first digital signal to the first circuit. The second signal processing unit is configured to process the third analog signal output by the second circuit to obtain an air interface signal corresponding to the third analog signal, and output the air interface signal corresponding to the third analog signal.

8. The communication system of claim 7, wherein, The first module further comprises a third signal processing unit and a third combiner; The third combiner comprises a first input port and a second input port, the first input port is configured to input a sixth analog signal and a seventh analog signal, the receiving time of the seventh analog signal being later than that of an eighth analog signal, the sixth analog signal being a signal obtained by processing the eighth analog signal and finally outputting, the sixth analog signal being a signal obtained based on the third analog signal, and the second input port being configured to input a ninth analog signal, the ninth analog signal being a phase-inverted signal of the sixth analog signal. An output port of the third combiner is connected with an input port of the first signal processing unit, an output port of the first signal processing unit is connected with an input port of the first circuit and an input port of the third signal processing unit, and an output port of the third signal processing unit is connected with the second input port. The first signal processing unit is configured to perform signal processing on the eighth analog signal input by the third combiner to obtain the first digital signal, and output the first digital signal, and the sixth analog signal is a signal obtained based on the third analog signal; The third signal processing unit is configured to perform signal processing on the first digital signal and output the ninth analog signal.

9. The communication system according to claim 7 or 8, characterized by The first module further comprises a fourth signal processing unit, a fourth combiner and a third frequency shift device, and the second module further comprises a fourth frequency shift device, a fifth combiner and a sixth combiner; The input port of the fourth signal processing unit is connected with the output port of the first signal processing unit, the input port of the fourth combiner is connected with the output port of the fourth signal processing unit and the output port of the third frequency shift device, the output port of the fourth combiner is connected with the input port of the first optoelectronic module, the input port of the fifth combiner is connected with the output port of the second optoelectronic module and the output port of the fourth frequency shift device, the output port of the fifth combiner is connected with the input port of the sixth combiner, and the input port of the sixth combiner is further connected with the output port of the second signal processing unit; The fourth signal processing unit is configured to perform signal processing on the first digital signal and output the noise signal, which is formed when the first digital signal is processed by signal amplification; The fourth combiner is configured to perform combiner processing on the noise signal and the third local signal output by the third frequency shift device, and output the tenth analog signal to the first optoelectronic module, wherein the third local signal is used for frequency shifting of the noise signal, and the frequency point of the tenth analog signal is the same as that of the first analog signal; The first optoelectronic module is configured to perform electro-optical conversion on the tenth analog signal to obtain an analog optical signal of the tenth analog signal, and transmit the tenth analog signal to the second optoelectronic module through the optical fiber; The second optoelectronic module is configured to perform photoelectric conversion on the analog optical signal of the tenth analog signal to obtain the tenth analog signal, and output the tenth analog signal to the fifth combiner; The fifth combiner is configured to perform combiner processing on the tenth analog signal and the fourth local signal output by the fourth frequency shift device, and output the eleventh analog signal to the sixth combiner, wherein the fourth local signal is used for frequency shifting of the tenth analog signal, and the frequency point of the eleventh analog signal is the same as that of the third analog signal; The sixth combiner is configured to perform combiner processing on the eleventh analog signal and the twelfth analog signal, and output a signal obtained by the combiner processing, wherein the twelfth analog signal is a signal obtained by performing signal processing on the third analog signal by the fourth signal processing unit, and the twelfth analog signal comprises the noise signal.

10. The communication system according to any one of claims 1 to 9, characterized by, The wavelength of the analog optical signal of the first analog signal is different from the wavelength of the analog optical signal of the second analog signal.

11. A communication system, characterized by Comprise: The first module comprises a first optoelectronic module, and the second module comprises a second optoelectronic module; The first optoelectronic module is configured to perform electrical-optical conversion and wavelength shifting on the received first analog signal and second analog signal, to obtain an analog optical signal of the first analog signal and an analog optical signal of the second analog signal, and output the analog optical signal of the first analog signal and the analog optical signal of the second analog signal to the second optoelectronic module through an analog optical wireless communication optical fiber, wherein the wavelength of the analog optical signal of the first analog signal is different from the wavelength of the analog optical signal of the second analog signal; The second optoelectronic module is configured to perform wavelength shifting and photoelectric conversion on the analog optical signal of the first analog signal and the analog optical signal of the second analog signal, to obtain the first analog signal and the second analog signal.

12. The communication system of claim 11, wherein, The frequency of the first analog signal is the same as the frequency of the second analog signal.

13. The communication system of claim 11, wherein, The frequency of the first analog signal is different from the frequency of the second analog signal.

14. The communication system of claim 13, wherein, The first module further comprises a first circuit, and the second module further comprises a second circuit, wherein the output end of the first circuit is connected to the input end of the first optoelectronic module, and the output end of the second optoelectronic module is connected to the input end of the second circuit; The first circuit is configured to perform signal processing on the input first digital signal to obtain the first analog signal, and output the first analog signal to the first optoelectronic module, wherein the frequency of the first analog signal is different from the frequency of the first digital signal; The second circuit is configured to perform signal processing on the input first analog signal to obtain a third analog signal, wherein the frequency of the third analog signal is the same as the frequency of the first digital signal.

15. The communication system of claim 14, wherein, The first circuit comprises a digital-to-analog conversion device, a first power amplifier, a first frequency shifting device, and a first combiner; The digital-to-analog conversion device is configured to perform digital-to-analog conversion on the input first digital signal to obtain an analog signal of the first digital signal, and output the analog signal of the first digital signal to the first power amplifier; The first power amplifier is configured to perform amplification processing on the analog signal of the first digital signal to obtain a fourth analog signal, and output the fourth analog signal to the first combiner; The first combiner is configured to perform combining processing on the fourth analog signal and a first local oscillator signal output by the first frequency shifting device, and output the first analog signal to the first optoelectronic module, wherein the first local oscillator signal is used for frequency shifting of the fourth analog signal.

16. The communication system of claim 14, wherein, The first circuit comprises a digital-to-analog conversion device, a first combiner, a first frequency shifting device, and a first power amplifier; The digital-to-analog conversion device is configured to perform digital-to-analog conversion on the input first digital signal to obtain an analog signal of the first digital signal, and output the analog signal of the first digital signal to the first combiner; The first combiner is configured to combine the analog signal of the first digital signal and a first local oscillator signal output by the first frequency-shifting device, and output a fifth analog signal to the first power amplifier, the first local oscillator signal being used for frequency-shifting the analog signal of the first digital signal, and the frequency point of the fifth analog signal being the same as that of the first analog signal. The first power amplifier is configured to amplify the fifth analog signal to obtain the first analog signal, and output the first analog signal to the first optoelectronic module.

17. The communication system of claim 14, wherein, The first circuit comprises a first combiner, a first frequency-shifting device, a digital-to-analog conversion device, and a first power amplifier. The first combiner is configured to combine the input first digital signal and a first local oscillator signal output by the first frequency-shifting device, and output a second digital signal to the digital-to-analog conversion device, the frequency point of the second digital signal being the same as that of the first analog signal, and the first local oscillator signal being used for frequency-shifting the first digital signal. The digital-to-analog conversion device is configured to perform digital-to-analog conversion on the second digital signal to obtain an analog signal of the second digital signal, and output the analog signal of the second digital signal to the first power amplifier. The first power amplifier is configured to amplify the analog signal of the second digital signal to obtain the first analog signal, and output the first analog signal to the first optoelectronic module.

18. The communication system of claim 12, wherein, The first module further comprises a first circuit, and the second module further comprises a second circuit, an output end of the first circuit being connected to an input end of the first optoelectronic module, and an output end of the second optoelectronic module being connected to an input end of the second circuit. The first circuit is configured to perform signal processing on the input first digital signal to obtain the first analog signal, and output the first analog signal to the first optoelectronic module, the frequency point of the first analog signal being the same as that of the first digital signal. The second circuit is configured to perform signal processing on the input first analog signal to obtain a third analog signal, the frequency point of the third analog signal being the same as that of the first digital signal.

19. The communication system of claim 18, wherein, The first circuit comprises a digital-to-analog conversion device and a first power amplifier. The digital-to-analog conversion device is configured to perform digital-to-analog conversion on the input first digital signal to obtain an analog signal of the first digital signal, and output the analog signal of the first digital signal to the first power amplifier. The first power amplifier is configured to amplify the analog signal of the first digital signal to obtain the first analog signal, and output the first analog signal to the first optoelectronic module.

20. The communication system of claim 18, wherein, The first module further comprises a first signal processing unit, and the second module further comprises a second signal processing unit. The first signal processing unit is configured to perform signal processing on an input air interface signal to obtain a first digital signal, and output the first digital signal to the first circuit. The second signal processing unit is configured to perform signal processing on a third analog signal output by a second circuit to obtain an air interface signal corresponding to the third analog signal, and output the air interface signal corresponding to the third analog signal.

21. A method of communication, comprising: Comprise: The first optoelectronic module performs electro-optical conversion on the received first analog signal and second analog signal respectively to obtain an analog optical signal of the first analog signal and an analog optical signal of the second analog signal, and outputs the analog optical signal of the first analog signal and the analog optical signal of the second analog signal through an analog optical wireless communication optical fiber, wherein the frequency point of the first analog signal is different from the frequency point of the second analog signal; The second optoelectronic module performs photoelectric conversion on the received analog optical signal of the first analog signal and the analog optical signal of the second analog signal respectively to obtain the first analog signal and the second analog signal.

22. The communication method of claim 21, wherein, The method further comprises: The first circuit performs signal processing on the input first digital signal to obtain the first analog signal, and outputs the first analog signal to the first optoelectronic module, wherein the frequency point of the first analog signal is different from the frequency point of the first digital signal; The second circuit performs signal processing on the input first analog signal to obtain a third analog signal, wherein the frequency point of the third analog signal is the same as the frequency point of the first digital signal.

23. The communication method of claim 22, wherein, The first circuit comprises a digital-to-analog conversion device, a first power amplifier, a first frequency shift device, and a first combiner, and performs signal processing on the input first digital signal to obtain the first analog signal, comprising: The digital-to-analog conversion device performs digital-to-analog conversion on the input first digital signal to obtain an analog signal of the first digital signal, and outputs the analog signal of the first digital signal to the first power amplifier; The first power amplifier performs amplification processing on the analog signal of the first digital signal to obtain a fourth analog signal, and outputs the fourth analog signal to the first combiner; The first combiner performs combiner processing on the fourth analog signal and a first local oscillator signal output by the first frequency shift device, and outputs the first analog signal to the first optoelectronic module, wherein the first local oscillator signal is used for frequency shifting of the fourth analog signal.

24. The communication method according to claim 23, wherein, The first circuit comprises a digital-to-analog conversion device, a first power amplifier, a first frequency shift device, and a first combiner, and performs signal processing on the input first digital signal to obtain the first analog signal, comprising: The digital-to-analog conversion device performs digital-to-analog conversion on the input first digital signal to obtain an analog signal of the first digital signal, and outputs the analog signal of the first digital signal to the first combiner; The first combiner performs combiner processing on the analog signal of the first digital signal and a first local oscillator signal output by the first frequency shift device, and outputs a fifth analog signal to the first power amplifier, wherein the first local oscillator signal is used for frequency shifting of the analog signal of the first digital signal, and the frequency point of the fifth analog signal is the same as the frequency point of the first analog signal; The first power amplifier amplifies the fifth analog signal to obtain the first analog signal, and outputs the first analog signal to the first optoelectronic module.

25. The communication method of claim 23, wherein, The first circuit includes a digital-to-analog conversion device, a first power amplifier, a first frequency shift device, and a first combiner. The first circuit processes an input first digital signal to obtain the first analog signal, including: The first combiner combines the input first digital signal and a first local oscillator signal output by the first frequency shift device, and outputs a second digital signal to the digital-to-analog conversion device. The frequency point of the second digital signal is the same as that of the first analog signal, and the first local oscillator signal is used to frequency shift the first digital signal. The digital-to-analog conversion device converts the second digital signal to obtain an analog signal of the second digital signal, and outputs the analog signal of the second digital signal to the first amplifier. The first power amplifier amplifies the analog signal of the second digital signal to obtain the first analog signal, and outputs the first analog signal to the first optoelectronic module.

26. The communication method according to any one of claims 22 to 25, wherein, The second circuit includes a second combiner and a second frequency shift device. The second circuit processes the input first analog signal to obtain a third analog signal: The second frequency shift device outputs a second local oscillator signal to the second combiner. The second combiner combines the input first analog signal and the second local oscillator signal, and outputs the third analog signal. The second local oscillator signal is used to frequency shift the first analog signal.

27. The communication method according to any one of claims 22 to 26, characterized by, The method further includes: A first signal processing unit processes an input air interface signal to obtain the first digital signal, and outputs the first digital signal to the first circuit. A second signal processing unit processes the third analog signal output by the second circuit to obtain air interface information corresponding to the third analog signal, and outputs an air interface signal corresponding to the third analog signal.

28. A method of communication, comprising: including: The first optoelectronic module performs electro-optical conversion and wavelength shift processing on the received first analog signal and second analog signal to obtain analog optical signals of the first analog signal and the second analog signal, and outputs the analog optical signals of the first analog signal and the second analog signal through an analog optical wireless communication optical fiber. The wavelength of the analog optical signal of the first analog signal is different from the wavelength of the analog optical signal of the second analog signal. The second optoelectronic module performs wavelength shift processing and photoelectric conversion on the received analog optical signals of the first analog signal and the second analog signal to obtain the first analog signal and the second analog signal.

29. The communication method of claim 28, wherein, The frequency point of the first analog signal is the same as that of the second analog signal.

30. The communication method of claim 28, wherein, The frequency point of the first analog signal is different from that of the second analog signal.

31. The communication method of claim 30, wherein, The method further includes: The first circuit processes the input first digital signal to obtain the first analog signal, and outputs the first analog signal to the first optoelectronic module, wherein the frequency point of the first analog signal is different from the frequency point of the first digital signal; The second circuit processes the input first analog signal to obtain a third analog signal, and the frequency point of the third analog signal is the same as the frequency point of the first digital signal.

32. The communication method of claim 31, wherein, The first circuit comprises a digital-to-analog conversion device, a first power amplifier, a first frequency shift device and a first combiner, and the method further comprises: The digital-to-analog conversion device converts the input first digital signal to obtain an analog signal of the first digital signal, and outputs the analog signal of the first digital signal to the first power amplifier; The first power amplifier amplifies the analog signal of the first digital signal to obtain a fourth analog signal, and outputs the fourth analog signal to the first combiner; The first combiner combines the fourth analog signal and a first local oscillator signal output by the first frequency shift device, and outputs the first analog signal to the first optoelectronic module, wherein the first local oscillator signal is used for frequency shifting of the fourth analog signal.

33. The communication method of claim 31, wherein, The first circuit comprises a digital-to-analog conversion device, a first combiner, a first frequency shift device and a first power amplifier, and the method further comprises: The digital-to-analog conversion device converts the input first digital signal to obtain an analog signal of the first digital signal, and outputs the analog signal of the first digital signal to the first combiner; The first combiner combines the analog signal of the first digital signal and a first local oscillator signal output by the first frequency shift device, and outputs a fifth analog signal to the first power amplifier, wherein the first local oscillator signal is used for frequency shifting of the analog signal of the first digital signal, and the frequency point of the fifth analog signal is the same as the frequency point of the first analog signal; The first power amplifier amplifies the fifth analog signal to obtain the first analog signal, and outputs the first analog signal to the first optoelectronic module.

34. The communication method of claim 31, wherein, The first circuit comprises a first combiner, a first frequency shift device, a digital-to-analog conversion device and a first power amplifier, and the method further comprises: The first combiner combines the input first digital signal and a first local oscillator signal output by the first frequency shift device, and outputs a second digital signal to the digital-to-analog conversion device, wherein the frequency point of the second digital signal is the same as the frequency point of the first analog signal, and the first local oscillator signal is used for frequency shifting of the first digital signal; The digital-to-analog conversion device converts the second digital signal to obtain an analog signal of the second digital signal, and outputs the analog signal of the second digital signal to the first power amplifier; The first power amplifier amplifies the analog signal of the second digital signal to obtain the first analog signal, and outputs the first analog signal to the first optoelectronic module.

35. The communication method of claim 29, wherein, The method further comprises: The first circuit processes the input first digital signal to obtain the first analog signal, and outputs the first analog signal to the first optoelectronic module, wherein the frequency point of the first analog signal is same as that of the first digital signal. The second circuit processes the input first analog signal to obtain a third analog signal, wherein the frequency point of the third analog signal is same as that of the first digital signal.

36. A communication system, characterized by The communication system comprises a base station and the communication system of any one of claims 1-10, and the first analog signal and the second analog signal are obtained according to a signal transmitted by the base station.

37. A communication system, characterized by The communication system comprises a base station and the communication system of any one of claims 11-20, and the first analog signal and the second analog signal are obtained according to a signal transmitted by the base station.

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