Communication device

Abstract

The embodiment of the invention provides communication equipment, and belongs to the technical field of communication. The communication equipment comprises an indoor unit and an outdoor unit, wherein the indoor unit and the outdoor unit are in communication connection through an optical fiber; the indoor unit comprises a baseband processing module, a first radio frequency signal processing module and a first radio-over-fiber communication module, the baseband processing module is connected with the first radio frequency signal processing module, and the first radio frequency signal processing module is connected with the first radio-over-fiber communication module; the outdoor unit comprises a second radio-over-fiber communication module and a second radio-frequency signal processing module, and the second radio-frequency signal processing module is connected with the second radio-over-fiber communication module. The embodiment of the invention aims to meet the large bandwidth requirement of interconnection of the indoor unit and the outdoor unit in the communication equipment, and the in-band flatness can be effectively improved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a communication device. Background Art

[0002] With the development trend of 5G mobile communications and the introduction of key technologies, people have higher and higher requirements for wireless communication speed. Since millimeter wave frequency spectrum resources are abundant and large bandwidth can be obtained, the use of millimeter waves for point-to-point communication (Point To Point Microwave Communication) has great advantages.

[0003] In traditional point-to-point communication equipment, the indoor unit (IDU) and the outdoor unit (ODU) are connected over long distances via an intermediate frequency cable. The ODU generally uses a two-stage mixer to convert the carrier signal frequency to the microwave frequency band. However, traditional point-to-point communication equipment cannot meet the demodulation performance requirements of large bandwidths, and the in-band flatness is very poor. Summary of the invention

[0004] The embodiment of the present application provides a communication device, aiming to solve the problem that traditional communication devices cannot meet the demodulation performance required by large bandwidth and have poor in-band flatness.

[0005] The embodiment of the present application provides a communication device, including an indoor unit and an outdoor unit, wherein the indoor unit and the outdoor unit are communicatively connected via an optical fiber; the indoor unit includes a baseband processing module, a first radio frequency signal processing module, and a first optical wireless communication module, wherein the baseband processing module is connected to the first radio frequency signal processing module, and the first radio frequency signal processing module is connected to the first optical wireless communication module; the outdoor unit includes a second optical wireless communication module and a second radio frequency signal processing module, and the second radio frequency signal processing module is connected to the second optical wireless communication module; wherein:

[0006] The baseband processing module is used to output a baseband digital signal to the first RF signal processing module, the first RF signal processing module is used to perform signal modulation on the baseband digital signal to obtain a first RF signal, the first wireless communication over optical fiber module is used to output the first RF signal to the second wireless communication over optical fiber module through the optical fiber, and the second RF signal processing module is used to perform signal modulation on the first RF signal to obtain a first electromagnetic wave and output it;

[0007] The second RF signal processing module is also used to receive a second electromagnetic wave in the external environment, and perform signal modulation processing on the second electromagnetic wave to obtain a second RF signal. The second optical wireless communication module is used to output the second RF signal to the first optical wireless communication module through the optical fiber. The first RF signal processing module is also used to perform signal modulation on the second RF signal to obtain a target digital signal, and the baseband processing module is also used to receive the target digital signal.

[0008] The communication device of the embodiment of the present application uses optical fiber as the transmission medium between the indoor unit and the outdoor unit, and uses the first optical wireless communication module and the second optical wireless communication module to transmit the first radio frequency signal or the second radio frequency signal between the indoor unit and the outdoor unit. The optical fiber can be extended to support the signal bandwidth to increase exponentially, and the extension distance between the indoor unit and the outdoor unit can also be increased exponentially, which effectively meets the large bandwidth requirements for the interconnection between the indoor unit and the outdoor unit in the communication device, and can effectively improve the in-band flatness. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A schematic block diagram of a communication device provided in an embodiment of the present application;

[0010] Figure 2 A schematic block diagram of a first radio frequency signal processing module provided in an embodiment of the present application;

[0011] Figure 3 Another schematic block diagram of a first radio frequency signal processing module provided in an embodiment of the present application;

[0012] Figure 4 Another schematic block diagram of the first radio frequency signal processing module provided in an embodiment of the present application;

[0013] Figure 5 A schematic block diagram of an indoor unit provided in an embodiment of the present application;

[0014] Figure 6 A schematic block diagram of a second radio frequency signal processing module provided in an embodiment of the present application;

[0015] Figure 7 Another schematic block diagram of a second radio frequency signal processing module provided in an embodiment of the present application;

[0016] Figure 8 A schematic block diagram of an outdoor unit provided in an embodiment of the present application;

[0017] Fig. 9 A schematic block diagram of an outdoor unit and an antenna module provided in an embodiment of the present application;

[0018] Fig.10A first exemplary block diagram of a communication device provided in an embodiment of the present application;

[0019] Fig.11 A second exemplary block diagram of a communication device provided in an embodiment of the present application;

[0020] Fig.12 A third exemplary block diagram of a communication device provided in an embodiment of the present application;

[0021] Fig.13 A fourth exemplary block diagram of a communication device provided in an embodiment of the present application;

[0022] Fig.14 A fifth exemplary block diagram of a communication device provided in an embodiment of the present application;

[0023] Fig.15 This is a sixth exemplary block diagram of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] The flowcharts shown in the accompanying drawings are only examples and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may also be decomposed, combined or partially merged, so the actual execution order may change according to actual conditions.

[0026] It should be understood that the terms used in this application specification are only for the purpose of describing specific embodiments and are not intended to limit the application. As used in this application specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0027] Point-to-point communication (Point To Point Microwave Communication) is an important link structure of microwave millimeter wave backhaul network. Point-to-point backhaul has the following advantages: 1. Low cost. The cost of point-to-point backhaul is much lower than the cost of installing optical fiber. 2. Small size. The backhaul equipment is small and flexible to load and unload. 3. Easy to install. The whole equipment is simple and can be installed in various complex terrains. Due to the above advantages, point-to-point backhaul has become an important solution for future backhaul networks. Since millimeter wave frequency spectrum resources are abundant and large bandwidth can be obtained, using millimeter waves for point-to-point communication has great advantages.

[0028] In traditional point-to-point communication equipment, the indoor unit IDU and the outdoor unit ODU are connected over long distances through an intermediate frequency cable, and the interface intermediate frequency is selected to be around several hundred MHz. Due to the performance of the RF cable, the distance between the IDU and ODU has many requirements for the placement of the IDU device, and the longer the spatial distance, the greater the insertion loss of the RF cable. At the same time, in response to large bandwidth requirements, the in-band flatness of conventional intermediate frequency cables is very poor and cannot meet the demodulation performance requirements of high modulation requirements.

[0029] Conventional ODUs use a two-stage mixer frequency conversion method to change the carrier signal frequency to the microwave frequency band. The RF link structure is very complex, the debugging of the equipment is more difficult, and the in-band flatness problem is serious. In addition, the two-stage frequency conversion architecture imposes high suppression requirements on the filter for the combined suppression of the mixer's combined spurious and half-IF spurious.

[0030] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0031] Please refer to Figure 1 , Figure 1 A schematic block diagram of a communication device provided in an embodiment of the present application.

[0032] like Figure 1 As shown, the communication device 10 includes an indoor unit 100 and an outdoor unit 200, and the indoor unit 100 and the outdoor unit 200 are communicatively connected via an optical fiber 300. The communication device 10 may include a point-to-point communication device applied to a microwave frequency band and a microwave point-to-point device applied to a millimeter wave frequency band, for example, the communication device 10 may be a 5G base station.

[0033] The indoor unit 100 includes a baseband processing module 110, a first RF signal processing module 120 and a first optical wireless communication module 130. The baseband processing module 110 is connected to the first RF signal processing module 120, and the first RF signal processing module 120 is connected to the first optical wireless communication module 130. The outdoor unit 200 includes a second optical wireless communication module 210 and a second RF signal processing module 220, and the second RF signal processing module 220 is connected to the second optical wireless communication module 210.

[0034] It should be noted that the communication device 10 can transmit and receive signals. The first radio-over-fiber module 130 and the second radio-over-fiber module 210 can use radio-over-fiber (RoF) to support the transmission of radio frequency signals between the indoor unit 100 and the outdoor unit 200 through the optical fiber 300. In other words, the link interconnection mode between the indoor unit 100 and the outdoor unit 200 uses the optical fiber 300 as the transmission medium, and the optical fiber 300 can be extended to support the signal bandwidth to increase exponentially, and the extension distance between the indoor unit 100 and the outdoor unit 200 can also be increased exponentially. It effectively solves various application problems such as the bandwidth problem of the RF cable for interconnecting indoor and outdoor units and the poor flatness in the band.

[0035] When the communication device 10 is transmitting a signal, the indoor unit 100 uses the baseband processing module 110 and the first RF signal processing module 120 to modulate the baseband digital signal into a first RF signal; then the first optical wireless communication module 130 supports the first RF signal to be transmitted through the optical fiber 300; the outdoor unit 200 uses the second optical wireless communication module 210 to receive the first RF signal transmitted through the optical fiber 300, and then uses the second RF signal processing module 220 to modulate the first RF signal to obtain a first electromagnetic wave and output it.

[0036] Exemplarily, the baseband processing module 110 is used to output a baseband digital signal to the first RF signal processing module 120, the first RF signal processing module 120 is used to modulate the baseband digital signal to obtain a first RF signal, the first wireless communication over optical fiber module 130 is used to output the first RF signal to the second wireless communication over optical fiber module 210 through the optical fiber 300, and the second RF signal processing module 220 is used to modulate the first RF signal to obtain and output a first electromagnetic wave. The first electromagnetic wave may be an electromagnetic wave in a microwave frequency band or a millimeter wave frequency band.

[0037] When the communication device 10 receives a signal, the outdoor unit 200 uses the second RF signal processing module 220 to perform signal modulation processing on the second electromagnetic wave in the external environment to obtain a second RF signal, and transmits the second RF signal through the optical fiber 300 through the second optical wireless communication module 210; the indoor unit 100 uses the first optical wireless communication module 130 to receive the second RF signal transmitted through the optical fiber 300, and then uses the baseband processing module 110 and the first RF signal processing module 120 to modulate the second RF signal to obtain a target digital signal and receive it.

[0038] Exemplarily, the second RF signal processing module 220 is further used to receive a second electromagnetic wave in the external environment, and perform signal modulation processing on the second electromagnetic wave to obtain a second RF signal, and the second wireless communication over optical fiber module 210 is used to output the second RF signal to the first wireless communication over optical fiber module 130 through the optical fiber 300; the first RF signal processing module 120 is further used to perform signal modulation on the second RF signal to obtain a target digital signal, and the baseband processing module 110 is further used to receive the target digital signal. The second electromagnetic wave can be an electromagnetic wave in the microwave frequency band or the millimeter wave frequency band.

[0039] In one embodiment, if Figure 1 and Figure 2 As shown, the first RF signal processing module 120 includes a first digital-to-analog conversion unit 121, a first analog-to-digital conversion unit 122, and a first low-noise amplification unit 123. The first digital-to-analog conversion unit 121 is connected to the baseband processing module 110, and is used to perform digital-to-analog conversion on the baseband digital signal to obtain a first analog signal; the first low-noise amplification unit 123 is connected to the first digital-to-analog conversion unit 121, and is used to amplify the first analog signal to obtain a first RF signal.

[0040] The first low-noise amplifying unit 123 is also connected to the first optical wireless communication module 130, and is also used to amplify the second RF signal output by the first optical wireless communication module 130; the first analog-to-digital conversion unit 122 is connected to the first low-noise amplifying unit 123, and is used to perform analog-to-digital conversion on the amplified second RF signal to obtain a target digital signal, and output the target digital signal to the baseband processing module 110.

[0041] It should be noted that the first digital-to-analog conversion unit 121 may include a digital-to-analog converter, and the first analog-to-digital conversion unit 122 may include an analog-to-digital converter. The digital-to-analog converter and the analog-to-digital converter may be integrated in the first RF signal processing module 120, such as an analog-to-digital / analog-to-digital conversion module. In some embodiments, the digital-to-analog converter and the analog-to-digital converter may also be separately provided. The digital-to-analog converter and the analog-to-digital converter may adopt RF sampling RFS technology or zero intermediate frequency ZIF technology, and the output RF signal frequency range may be MHZ to GHz.

[0042] It should be noted that in the ROF wireless communication application, in order to reduce the influence of noise coefficient deterioration, a first low-noise amplifier 123 is added in front of the first ROF wireless communication module 130. The first low-noise amplifier 123 is a low-noise amplifier. The low-noise amplifier is an amplifier with low noise characteristics. A device that can amplify the voltage or power of an input signal is composed of an electron tube or transistor, a power transformer and other electrical components. The first low-noise amplifier 123 can increase the pre-stage gain of the communication link of the communication device 10, and can output the saturated power of the power peak amplitude, thereby reducing the influence on the overall link noise coefficient.

[0043] In one embodiment, if Figure 1 and Figure 3 As shown, the first RF signal processing module 120 includes a second digital-to-analog conversion unit 124, a second analog-to-digital conversion unit 125, a first RF processing unit 126, a second RF processing unit 127 and a combining unit 128. The second digital-to-analog conversion unit 124 is connected to the baseband processing module 110, and is used to perform digital-to-analog conversion on the baseband digital signal to obtain a second analog signal; the first RF processing unit 126 is connected to the second digital-to-analog conversion unit 124, and is used to perform signal processing on the second analog signal to obtain a third RF signal; the combining unit 128 is connected to the first RF processing unit 126 and the first optical wireless communication module 130, and the combining unit 128 is used to combine and output the third RF signal to the first optical wireless communication module 130.

[0044] The combining unit 128 is also connected to the second RF processing unit 127, and the combining unit 128 is also used to combine the second RF signal and output it to the second RF processing unit 127; the second RF processing unit 127 is connected to the combining unit 128, and is used to process the second RF signal to obtain a third analog signal; the second analog-to-digital conversion unit 125 is connected to the second RF processing unit 127, and is used to perform analog-to-digital conversion on the third analog signal to obtain a target digital signal, and output the target digital signal to the baseband processing module 110.

[0045] It should be noted that the second digital-to-analog conversion unit 124 may include a digital-to-analog converter, and the second analog-to-digital conversion unit 125 may include an analog-to-digital converter. The digital-to-analog converter and the analog-to-digital converter may be integrated in the first RF signal processing module 120, or may be separately arranged. In some embodiments, there may be multiple RF processing units connected to the combining unit 128, for example, the first RF signal processing module 120 also includes a third RF processing unit, a fourth RF processing unit, and the like. When a higher signal-to-noise ratio is required for the signal, the signal-to-noise ratio can be improved by combining multiple channels. The order of the module units in the internal structure of the first RF signal processing module 120 can be adjusted, and the module units can be reduced or increased according to the indicator requirements of different air interfaces.

[0046] For example, Figure 3 and Figure 4 As shown, the first RF processing unit 126 includes a first filter and a first amplifier; the input end of the first filter is connected to the second digital-to-analog conversion unit 124, the output end of the first filter is connected to the input end of the first amplifier, and the output end of the first amplifier is connected to the combining unit 128; the first filter is used to filter the second analog signal to filter out stray signals, and the first amplifier is used to adjust the power of the filtered second analog signal to obtain a third RF signal. In some examples, the positions of the first filter and the first amplifier can also be replaced or other functional modules can be added, which is not specifically limited in the embodiments of the present application.

[0047] It can be understood that the internal structure of the second RF processing unit 127 may be the same as or different from the internal structure of the first RF processing unit 126, and the internal structure of the second RF processing unit 127 may reduce or increase the number of modules according to different air interface indicator requirements. For example, the second RF processing unit 127 may include a second filter and a frequency conversion device, and the frequency conversion device may include a mixer or a digital-to-analog / analog-to-digital converter. The embodiment of the present application does not specifically limit this.

[0048] In one embodiment, if Figure 5 As shown, the indoor unit 100 also includes a multiplexing module 140, and there are multiple first RF signal processing modules 120; the multiplexing module 140 is connected to the multiple first RF signal processing modules 120, and is also connected to the first optical wireless communication module 130; the multiplexing module 140 is used to perform signal filtering and aggregation on the first RF signals output by the multiple first RF signal processing modules 120, and then output them to the first optical wireless communication module 130, and the multiplexing module 140 is also used to perform signal shunting and filtering on the second RF signals output by the first optical wireless communication module 130, and then output them to the multiple first RF signal processing modules 120.

[0049] It should be noted that the multiplexing module 140 can be connected between multiple first RF signal processing modules 120 and the first optical wireless communication module 130, and the multiplexing module 140 can include a multiplexer, and other functional models can be added. Only one baseband processing module 110 can be set, or multiple baseband processing modules 110 can be set to be connected one-to-one with multiple first RF signal processing modules 120. When the signal is output, multi-channel data aggregation is performed by adding a multiplexing module 140, so as to synthesize a single signal output of different frequencies. When the signal is input, frequency separation is performed by adding a multiplexing module 140, so as to achieve multi-channel frequency signal separation. The frequency source can be a local oscillator signal provided by an external frequency source module, and up-conversion and down-conversion can be performed through the first RF signal processing module 120.

[0050] In one embodiment, the indoor unit 100 can connect multiple outdoor units 200 through multiple optical fibers 300, and the multi-channels of the outdoor unit 200 can be flexibly configured to achieve multi-service channel expansion. By combining multiple channels, the signal-to-noise ratio of the signal is increased and the influence of the noise coefficient change of the link is reduced.

[0051] Exemplarily, multi-channel data aggregation is performed by adding a multiplexing module, wherein the frequency of CH1 channel is set to F1, the frequency of CH2 channel is set to F2, and the frequency of CH3 channel is set to F3, and the minimum frequency of the multi-channel signal frequency is set to avoid the frequency range of the adjacent channel signal with the maximum bandwidth, and the frequency division multiplexing of multiple data channels is synthesized into a single signal output through the multiplexing module, and then output to multiple outdoor units through multiple optical fibers. It can be understood that the frequency separation implementation can also be realized through the multiplexing module.

[0052] In one embodiment, if Figure 1 and Figure 6 As shown, the second RF signal processing module 220 includes a first transmitting branch 221, a first receiving branch 222 and a first duplexer 223, the first transmitting branch 221 includes a first gain adjustment unit 2211, a first filtering unit 2212 and a second gain adjustment unit 2213, and the first receiving branch 222 includes a second low-noise amplification unit 2221, a second filtering unit 2222 and a third gain adjustment unit 2223;

[0053] The first gain adjustment unit 2211 is connected to the second optical wireless communication module 210, and is used to adjust the power of the first RF signal; the first filtering unit 2212 is connected to the first gain adjustment unit 2211, and is used to filter the first RF signal after power adjustment; the second gain adjustment unit 2213 is connected to the first filtering unit 2212, and is used to adjust the power of the filtered first RF signal again to obtain the first electromagnetic wave; the first duplexer 223 is connected to the second gain adjustment unit 2213, and is used to send the first electromagnetic wave;

[0054] The first duplexer 223 is also connected to the second low-noise amplifying unit 2221, and the first duplexer 223 is also used to transmit the second electromagnetic wave to the second low-noise amplifying unit 2221, and the second low-noise amplifying unit 2221 is used to amplify the signal of the second electromagnetic wave; the second filtering unit 2222 is connected to the second low-noise amplifying unit 2221, and is used to filter the second electromagnetic wave after signal amplification; the third gain adjustment unit 2223 is connected to the second filtering unit 2222, and is used to adjust the power of the filtered first RF signal again to obtain a second RF signal, and output the second RF signal to the second optical wireless communication module 210.

[0055] It should be noted that the first gain adjustment unit 2211, the second gain adjustment unit 2213 and the third gain adjustment unit 2223 are used to adjust the power level, thereby adjusting the signal power, and can be controlled by external SPI, voltage and other signals. For example, the second gain adjustment unit 2213 can be a power amplification unit, which is used to amplify the power of the filtered first radio frequency signal to obtain a first electromagnetic wave. The first filtering unit 2212 and the second filtering unit 2222 may include a filter, and the filter may be a filtering circuit composed of a capacitor, an inductor and a resistor. The filter can effectively filter out a frequency point of a specific frequency in the power line or frequencies other than the frequency point to obtain a power signal of a specific frequency, or eliminate a power signal after a specific frequency.

[0056] In one embodiment, if Figure 1 and Figure 7 As shown, the second RF signal processing module 220 includes a second transmitting branch 224, a second receiving branch 225 and a second duplexer 226, the second transmitting branch 224 includes a fourth gain adjustment unit 2241, a third filtering unit 2242, a first frequency conversion unit 2243, a fourth filtering unit 2244 and a fifth gain adjustment unit 2245, and the second receiving branch 225 includes a third low-noise amplification unit 2251, a fifth filtering unit 2252, a second frequency conversion unit 2253, a sixth filtering unit 2254 and a sixth gain adjustment unit 2255.

[0057] The fourth gain adjustment unit 2241 is connected to the second optical wireless communication module 210, and is used to adjust the power of the first radio frequency signal; the third filtering unit 2242 is connected to the fourth gain adjustment unit 2241, and is used to filter the image frequency interference signal in the first radio frequency signal after power adjustment; the first frequency conversion unit 2243 is connected to the third filtering unit 2242, and is used to up-convert the filtered first radio frequency signal; the fourth filtering unit 2244 is connected to the first frequency conversion unit 2243, and is used to filter the stray signal signal in the first radio frequency signal after up-conversion processing; the fifth gain adjustment unit 2245 is connected to the fourth filtering unit 2244, and is used to adjust the power of the first radio frequency signal after re-filtering again to obtain the first electromagnetic wave; the second duplexer 226 is connected to the fifth gain adjustment unit 2245, and is used to send the first electromagnetic wave;

[0058] The second duplexer 226 is also connected to the third low-noise amplifying unit 2251, and the second duplexer 226 is also used to transmit the second electromagnetic wave to the third low-noise amplifying unit 2251, and the third low-noise amplifying unit 2251 is used to amplify the signal of the second electromagnetic wave; the fifth filtering unit 2252 is connected to the third low-noise amplifying unit 2251, and is used to filter the second electromagnetic wave after signal amplification; the second frequency conversion unit 2253 is connected to the fifth filtering unit 2252, and is used to down-convert the filtered second electromagnetic wave; the sixth filtering unit 2254 is connected to the second frequency conversion unit 2253, and is used to filter the stray signal signal in the second electromagnetic wave after down-conversion processing; the sixth gain adjustment unit 2255 is connected to the sixth filtering unit 2254, and is used to adjust the power of the second electromagnetic wave after filtering again to obtain a second radio frequency signal, and output the second radio frequency signal to the second optical wireless communication module 210.

[0059] It should be noted that the fifth gain adjustment unit 2245 can be, for example, a power amplification unit, which is used to power amplify the filtered first RF signal to obtain a first electromagnetic wave. When the first RF signal cannot be output to the application frequency range, a first-level mixing module such as a first frequency conversion unit 2243 and a second frequency conversion unit 2253 must be added through the subsequent link to modulate the frequency of the output signal to the range of the application frequency band. Mixing is a linear shifting process of a spectrum, which converts a signal from one frequency to another. The first frequency conversion unit 2243 and the second frequency conversion unit 2253 can be mixers, which are used to multiply signals of different frequencies to achieve frequency conversion. The internal structure of the second RF signal processing module 220 can reduce or increase the number of modules according to different air interface indicator requirements, etc., and the embodiments of the present application do not specifically limit this.

[0060] In one embodiment, if Figure 8As shown, the second RF signal processing module 220 includes an integrated chip 227 of a RF packaging system, such as a SIP (System In a Package) chip. The integrated chip 227 of the RF packaging system integrates a large number of RF link structures, in which the order of modules within the structure can be adjusted, and the link modules can be reduced or increased according to the index requirements of different air interfaces. The integrated chip 227 of the RF packaging system can be applied to E-BAND scenarios, that is, scenarios with a signal frequency range of 71 to 76 GHz / 81 to 86 GHz.

[0061] In one embodiment, if Fig. 9 As shown, the communication device 10 further includes an antenna module 400, which is connected to the second RF signal processing module 220 in the outdoor unit 200. The antenna module 400 is used to receive the first electromagnetic wave transmitted by the second RF signal processing module 220 and output the first electromagnetic wave; the antenna module 400 is also used to receive the second electromagnetic wave in the external environment and transmit the second electromagnetic wave to the second RF signal processing module 220.

[0062] It should be noted that, in the receiving mode working scenario, the antenna module 400 can receive electromagnetic waves from the air to obtain a second electromagnetic wave, and perform signal modulation processing on the second electromagnetic wave through the second RF signal processing module 220. In the transmitting mode working scenario, the antenna module 400 can receive the first electromagnetic wave transmitted by the second RF signal processing module 220, and emit the first electromagnetic wave to the external environment.

[0063] It should be noted that the embodiments of the present application can be applied to microwave products in the C, Ku, K and other bands, and can also be applied to large-bandwidth products in the E-Band and D-Band bands. After the indoor unit 100 is separated from the outdoor unit 200, the indoor unit 100 and the outdoor unit 200 can be independently evolved, and the hardware circuit upgrade can be free from mutual design constraints. Moreover, the combination of the indoor unit 100 and the outdoor unit 200 can be flexibly configured, and the scene application is more extensive. Compared with the traditional link, the RF link architecture of the outdoor unit 200 greatly simplifies the RF link composition, effectively reduces the difficulty of debugging the equipment, and effectively solves the bandwidth and in-band flatness problems caused by long-distance intermediate frequency cables. The link architecture of the first-level frequency conversion reduces the difficulty of implementing the RF link, and the suppression requirements for the filter brought about by the combined suppression of the combined spurious and half-intermediate frequency spurious of the mixer are also greatly reduced.

[0064] The communication device 10 provided in the above embodiment uses the optical fiber 300 as the transmission medium between the indoor unit 100 and the outdoor unit 200, and uses the first wireless communication over fiber module 130 and the second wireless communication over fiber module 210 to transmit the first radio frequency signal or the second radio frequency signal between the indoor unit 100 and the outdoor unit 200. The optical fiber extension supports that the signal bandwidth can be increased exponentially, and the extension distance between the indoor unit 100 and the outdoor unit 200 can also be increased exponentially, which effectively meets the large bandwidth requirement of the indoor unit 100 and the outdoor unit 200 interconnected in the communication device 10, and can effectively improve the in-band flatness.

[0065] See below Figures 10 to 15 , combined with a specific exemplary block diagram of the indoor unit and the outdoor unit in the communication device, it is explained:

[0066] like Fig.10 As shown, the application scenario 1-1 of the communication device is a higher frequency scenario applied to millimeter waves. When the first digital-to-analog conversion unit / first analog-to-digital conversion unit cannot output to the application frequency range, a first frequency conversion unit and a second frequency conversion unit must be added through the outdoor unit to modulate the output frequency to the application frequency band. The order of modules within the structure can be adjusted, and the link modules can be reduced or increased according to the requirements of different air interface indicators.

[0067] like Fig.11 As shown in the figure, application scenario 1-2 is applied to the higher frequency scenario of millimeter wave. When the signal-to-noise ratio is required to be high, the signal-to-noise ratio can be improved by combining multiple channels. Multiple channels are configured according to equal amplitude and phase signals. Theoretically, the signal-to-noise ratio is improved by 10*log(n) after passing through the combining module. Conventional filtering units and gain adjustment units are added to the outdoor unit. The order of modules within the structure can be adjusted, and the link modules can be reduced or increased according to the indicator requirements of different air interfaces.

[0068] like Fig.12 As shown, the application scenario 2-1 of the communication device is applied to the lower frequency scenario of millimeter wave. When the first digital-to-analog conversion unit / the first analog-to-digital conversion unit directly outputs to the application frequency range. The order of modules within the structure can be adjusted, and the link modules can be reduced or increased according to the indicator requirements of different air interfaces.

[0069] like Fig.13As shown, the application scenario 2-2 of the communication equipment is a lower frequency scenario applied to millimeter waves. When the signal-to-noise ratio is required to be higher, the signal-to-noise ratio can be improved by combining multiple channels. Multiple channels are configured according to equal amplitude and phase signals, and the outdoor unit adds conventional filtering units and gain adjustment units. The order of modules within the structure can be adjusted, and the link modules can be reduced or increased according to the indicator requirements of different air interfaces.

[0070] like Fig.14 As shown, the application scenario 3-1 of the communication device is applied to the E-BAND scenario. The RF unit is an integrated chip of the RF packaging system (System In a Package, SIP), which integrates a large number of RF link structures. The order of modules within the structure can be adjusted, and the link modules can be reduced or increased according to the indicator requirements of different air interfaces.

[0071] like Fig.15 As shown in the figure, the application scenario 3-2 of the communication equipment is applied to the E-BAND scenario. When the signal-to-noise ratio is required to be high, the signal-to-noise ratio can be improved by combining multiple channels. Multiple channels are configured according to equal-amplitude and in-phase signals, and the RF module functions include conventional filtering modules and gain adjustment modules. The RF unit is an integrated SIP, which integrates more RF link structures. The order of modules within the structure can be adjusted, and the link modules can be reduced or increased according to the indicator requirements of different air interfaces.

[0072] It will be appreciated by those skilled in the art that all or some of the steps, systems, and functional modules / units in the methods disclosed above may be implemented as software, firmware, hardware, and appropriate combinations thereof. In a hardware implementation, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed by several physical components in cooperation. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application-specific integrated circuit. In addition, it is well known to those skilled in the art that communication media typically contain computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and may include any information delivery medium.

[0073] The serial numbers of the embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments. The above are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A communication device, characterized in that: It includes an indoor unit and an outdoor unit, and the indoor unit and the outdoor unit are connected to each other through an optical fiber; the indoor unit includes a baseband processing module, a first radio frequency signal processing module and a first optical wireless communication module, the baseband processing module is connected to the first radio frequency signal processing module, and the first radio frequency signal processing module is connected to the first optical wireless communication module; the outdoor unit includes a second optical wireless communication module and a second radio frequency signal processing module, and the second radio frequency signal processing module is connected to the second optical wireless communication module; wherein: The baseband processing module is used to output a baseband digital signal to the first RF signal processing module, the first RF signal processing module is used to perform signal modulation on the baseband digital signal to obtain a first RF signal, the first wireless communication over optical fiber module is used to output the first RF signal to the second wireless communication over optical fiber module through the optical fiber, and the second RF signal processing module is used to perform signal modulation on the first RF signal to obtain a first electromagnetic wave and output it; The second RF signal processing module is also used to receive a second electromagnetic wave in the external environment, and perform signal modulation processing on the second electromagnetic wave to obtain a second RF signal. The second optical wireless communication module is used to output the second RF signal to the first optical wireless communication module through the optical fiber. The first RF signal processing module is also used to perform signal modulation on the second RF signal to obtain a target digital signal, and the baseband processing module is also used to receive the target digital signal.

2. The communication device according to claim 1, characterized in that The first radio frequency signal processing module includes a first digital-to-analog conversion unit, a first analog-to-digital conversion unit and a first low-noise amplification unit; The first digital-to-analog conversion unit is connected to the baseband processing module, and is used to perform digital-to-analog conversion on the baseband digital signal to obtain a first analog signal; the first low-noise amplification unit is connected to the first digital-to-analog conversion unit, and is used to amplify the first analog signal to obtain a first radio frequency signal; The first low-noise amplifying unit is also connected to the first optical wireless communication module, and is also used to amplify the second RF signal output by the first optical wireless communication module; the first analog-to-digital conversion unit is connected to the first low-noise amplifying unit, and is used to perform analog-to-digital conversion on the amplified second RF signal to obtain a target digital signal, and output the target digital signal to the baseband processing module.

3. The communication device according to claim 2, characterized in that The first digital-to-analog conversion unit includes a digital-to-analog converter, and the first analog-to-digital conversion unit includes an analog-to-digital converter; the digital-to-analog converter and the analog-to-digital converter are integrated in the first radio frequency signal processing module.

4. The communication device according to claim 1, characterized in that The first RF signal processing module includes a second digital-to-analog conversion unit, a second analog-to-digital conversion unit, a first RF processing unit, a second RF processing unit and a combining unit; The second digital-to-analog conversion unit is connected to the baseband processing module, and is used to perform digital-to-analog conversion on the baseband digital signal to obtain a second analog signal; the first radio frequency processing unit is connected to the second digital-to-analog conversion unit, and is used to perform signal processing on the second analog signal to obtain a third radio frequency signal; the combining unit is connected to the first radio frequency processing unit and the first optical wireless communication module, and the combining unit is used to combine the third radio frequency signal and output it to the first optical wireless communication module; The combining unit is also connected to the second RF processing unit, and the combining unit is also used to combine the second RF signals and output them to the second RF processing unit; the second RF processing unit is connected to the combining unit and is used to perform signal processing on the second RF signal to obtain a third analog signal; the second analog-to-digital conversion unit is connected to the second RF processing unit and is used to perform analog-to-digital conversion on the third analog signal to obtain a target digital signal, and output the target digital signal to the baseband processing module.

5. The communication device according to claim 4, characterized in that The first RF processing unit includes a first filter and a first amplifier; the input end of the first filter is connected to the second digital-to-analog conversion unit, the output end of the first filter is connected to the input end of the first amplifier, and the output end of the first amplifier is connected to the combining unit; the first filter is used to filter the second analog signal to filter out spurious signals, and the first amplifier is used to adjust the power of the filtered second analog signal to obtain a third RF signal.

6. The communication device according to claim 1, characterized in that The indoor unit further includes a multiplexing module, and the first radio frequency signal processing module is multiple; The multiplexing module is connected to multiple first RF signal processing modules and is also connected to the first optical wireless communication module; the multiplexing module is used to perform signal filtering and aggregation on the first RF signals output by multiple first RF signal processing modules and then output them to the first optical wireless communication module; the multiplexing module is also used to perform signal shunting and filtering on the second RF signals output by the first optical wireless communication module and then output them to multiple first RF signal processing modules.

7. The communication device according to any one of claims 1 to 6, characterized in that: The second RF signal processing module includes a first transmitting branch, a first receiving branch and a first duplexer, the first transmitting branch includes a first gain adjustment unit, a first filtering unit and a second gain adjustment unit, and the first receiving branch includes a second low-noise amplification unit, a second filtering unit and a third gain adjustment unit; The first gain adjustment unit is connected to the second optical wireless communication module, and is used to adjust the power of the first radio frequency signal; the first filtering unit is connected to the first gain adjustment unit, and is used to filter the first radio frequency signal after power adjustment; the second gain adjustment unit is connected to the first filtering unit, and is used to adjust the power of the filtered first radio frequency signal again to obtain a first electromagnetic wave; the first duplexer is connected to the second gain adjustment unit, and is used to send the first electromagnetic wave; The first duplexer is also connected to the second low-noise amplifying unit, and the first duplexer is also used to transmit the second electromagnetic wave to the second low-noise amplifying unit, and the second low-noise amplifying unit is used to amplify the signal of the second electromagnetic wave; the second filtering unit is connected to the second low-noise amplifying unit, and is used to filter the second electromagnetic wave after signal amplification; the third gain adjustment unit is connected to the second filtering unit, and is used to adjust the power of the filtered first RF signal again to obtain a second RF signal, and output the second RF signal to the second optical wireless communication module.

8. The communication device according to any one of claims 1 to 6, characterized in that: The second RF signal processing module includes a second transmitting branch, a second receiving branch and a second duplexer, the second transmitting branch includes a fourth gain adjustment unit, a third filtering unit, a first frequency conversion unit, a fourth filtering unit and a fifth gain adjustment unit, and the second receiving branch includes a third low-noise amplification unit, a fifth filtering unit, a second frequency conversion unit, a sixth filtering unit and a sixth gain adjustment unit; The fourth gain adjustment unit is connected to the second optical wireless communication module, and is used to adjust the power of the first radio frequency signal; the third filtering unit is connected to the fourth gain adjustment unit, and is used to filter the image frequency interference signal in the first radio frequency signal after power adjustment; the first frequency conversion unit is connected to the third filtering unit, and is used to up-convert the filtered first radio frequency signal; the fourth filtering unit is connected to the first frequency conversion unit, and is used to filter the stray signal signal in the first radio frequency signal after up-conversion; the fifth gain adjustment unit is connected to the fourth filtering unit, and is used to adjust the power of the first radio frequency signal after re-filtering to obtain the first electromagnetic wave; the second duplexer is connected to the fifth gain adjustment unit, and is used to send the first electromagnetic wave; The second duplexer is also connected to the third low-noise amplifying unit, and the second duplexer is also used to transmit the second electromagnetic wave to the third low-noise amplifying unit, and the third low-noise amplifying unit is used to amplify the signal of the second electromagnetic wave; The fifth filtering unit is connected to the third low-noise amplifying unit, and is used to filter the second electromagnetic wave after the signal is amplified; The second frequency conversion unit is connected to the fifth filtering unit and is used to perform down-conversion processing on the filtered second electromagnetic wave; The sixth filtering unit is connected to the second frequency conversion unit, and is used to filter the stray signal in the second electromagnetic wave after down-conversion processing; the sixth gain adjustment unit is connected to the sixth filtering unit, and is used to adjust the power of the second electromagnetic wave after filtering again to obtain a second RF signal, and output the second RF signal to the second optical wireless communication module.

9. The communication device according to any one of claims 1 to 6, characterized in that: The second radio frequency signal processing module includes an integrated chip of a radio frequency packaging system.

10. The communication device according to any one of claims 1 to 6, characterized in that: The communication device further comprises an antenna module, wherein the antenna module is connected to the second radio frequency signal processing module in the outdoor unit; The antenna module is used to receive the first electromagnetic wave transmitted by the second radio frequency signal processing module and output the first electromagnetic wave; the antenna module is also used to receive the second electromagnetic wave in the external environment and transmit the second electromagnetic wave to the second radio frequency signal processing module.

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