Communication device and communication system

Abstract

The embodiment of the application provides a communication device and a communication system, wherein the outdoor unit of the communication device comprises a switch unit and at least two signal processing units; one signal processing unit is used for processing a group of transceiving intermediate frequency signals, and the transceiving intermediate frequencies of the signals processed by different signal processing units are different; the switch unit is used for controlling a specified signal processing unit in the at least two signal processing units to process a specified transceiving intermediate frequency signal corresponding to the specified signal processing unit, so that the problem that a digital microwave system communication device only supports processing a group of transceiving intermediate frequency signals in the related art can be solved, the digital microwave communication device cannot meet the requirements of different application scenarios, and the technical effects of improving the versatility and flexibility of the communication device are achieved.

Description

Technical Field

[0001] The present invention relates to the field of communications, and more specifically, to a communication device and a communication system. Background Technology

[0002] Digital microwave transmits data signals wirelessly. A split-type digital microwave system consists of two parts: an indoor unit (IDU) and an outdoor unit (ODU). Figure 1 This is a schematic diagram of the microwave signal transmission process in a split-type digital microwave system in related technologies, such as... Figure 1 As shown: IDU and ODU are connected by an RF cable. One IDU sends the transmit intermediate frequency (TX IF) signal to one ODU. The ODU processes the TX IF signal and then transmits it to the next ODU through an antenna. After receiving the signal, the next ODU processes it and then transmits the receive intermediate frequency (RX IF) signal to another IDU. The IDU demodulates the received signal, thus realizing the transmission of microwave signals in a split digital microwave system.

[0003] The digital microwave communication system equipment in related technologies only supports processing one set of transmit and receive intermediate frequency signals, which makes it impossible for digital microwave communication equipment to meet the needs of different application scenarios. Summary of the Invention

[0004] This invention provides a communication device and a communication system to at least solve the problem in the related art that digital microwave system communication devices only support processing a set of transmit and receive intermediate frequency signals, resulting in digital microwave communication devices being unable to meet the needs of different application scenarios.

[0005] According to one embodiment of the present invention, a communication device is provided, comprising:

[0006] A communication device includes an indoor unit and an outdoor unit, wherein the indoor unit is connected to the outdoor unit, and the outdoor unit is connected to an antenna, characterized in that the outdoor unit includes:

[0007] Switching unit, at least two signal processing units;

[0008] One signal processing unit is used to process a set of transmit and receive intermediate frequency signals, and different signal processing units process signals with different transmit and receive intermediate frequencies;

[0009] The switching unit is used to control one of the at least two signal processing units to process a designated intermediate frequency signal corresponding to the designated signal processing unit.

[0010] According to another embodiment of the present invention, a communication system is provided, comprising: the communication device described above.

[0011] Through the embodiments of the present invention, the outdoor unit includes: a switching unit and at least two signal processing units; one signal processing unit is used to process a set of transmit and receive intermediate frequency signals, and the transmit and receive intermediate frequencies of the signals processed by different signal processing units are different; the switching unit is used to control one of the at least two signal processing units to process a designated transmit and receive intermediate frequency signal corresponding to the designated signal processing unit. Therefore, the problem that digital microwave system communication equipment in related technologies only supports processing a set of transmit and receive intermediate frequency signals, resulting in digital microwave communication equipment being unable to meet the needs of different application scenarios, can be solved, thereby achieving the technical effect of improving the versatility and flexibility of communication equipment. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the microwave signal transmission process in a split-type digital microwave system in related technologies;

[0013] Figure 2 This is a structural block diagram of a communication device according to an embodiment of the present invention;

[0014] Figure 3 This is a structural block diagram of a communication system according to an embodiment of the present invention;

[0015] Figure 4 This is a schematic diagram of the structure of a signal processing unit according to an embodiment of the present invention;

[0016] Figure 5 This is a schematic diagram of the structure of a communication device according to an embodiment of the present invention. Detailed Implementation

[0017] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings and examples.

[0018] It should be noted that the terms "first," "second," etc., in the specification, claims, and drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0019] This embodiment provides a communication device. Figure 2 This is a structural block diagram of a communication device according to an embodiment of the present invention, such as... Figure 2 As shown, this embodiment includes:

[0020] The indoor unit 22 and the outdoor unit 24 are connected, and the outdoor unit 24 is connected to the antenna 26. The outdoor unit 24 includes: a switching unit 30 and at least two signal processing units 28; wherein, one signal processing unit is used to process a set of transmit and receive intermediate frequency signals, and the transmit and receive intermediate frequencies of the signals processed by different signal processing units are different; the switching unit 30 is used to control one of the at least two signal processing units 28 to process the specified transmit and receive intermediate frequency signal corresponding to the specified signal processing unit.

[0021] Through the embodiments of the present invention, since the outdoor unit includes: a switching unit and at least two signal processing units; one signal processing unit is used to process a set of transmit and receive intermediate frequency signals, and the transmit and receive intermediate frequencies of the signals processed by different signal processing units are different; the switching unit is used to control one of the at least two signal processing units to process a designated transmit and receive intermediate frequency signal corresponding to the designated signal processing unit. Therefore, the problem that digital microwave system communication equipment in related technologies only supports processing a set of transmit and receive intermediate frequency signals, resulting in digital microwave communication equipment being unable to meet the needs of different application scenarios, can be solved, thereby achieving the technical effect of improving the versatility and flexibility of communication equipment.

[0022] In one exemplary implementation, only one signal processing unit can perform signal processing operations at any given time.

[0023] In one exemplary implementation, "a set of transmit and receive intermediate frequency signals" in this embodiment refers to transmit intermediate frequency signals and receive intermediate frequency signals.

[0024] In one exemplary embodiment, the communication device further includes a control unit for sending a control signal to the switch unit to control the opening and closing of the switch unit.

[0025] In one exemplary embodiment, the control unit may be a control chip such as a CPU, and the control unit may be installed in the outdoor unit.

[0026] In one exemplary embodiment, each of the at least two signal processing units includes: a filtering unit, a transmitting signal processing unit, a receiving signal processing unit, and a signal transceiver unit. It should be noted that, in one exemplary embodiment, the communication device may include multiple signal processing units, such as two, three, or four signal processing units, wherein each signal processing unit includes a filtering unit, a transmitting signal processing unit, a receiving signal processing unit, and a signal transceiver unit.

[0027] Alternatively, in an exemplary embodiment, for the at least two signal processing units, the different signal processing units each include different filtering units, and share at least one of the following: a transmit signal processing unit, a receive signal processing unit, and a signal transceiver unit;

[0028] The filtering unit has a first end connected to the first end of the indoor unit, used to select the received intermediate frequency (IF) signal and the transmitted IF signal. The first ends of the transmitted signal processing unit and the received signal processing unit are respectively connected to the second end of the filtering unit. The transmitted signal processing unit processes the transmitted signal, and the received signal processing unit processes the received signal. The first end of the transceiver unit is connected to the second ends of the transmitted signal processing unit and the received signal processing unit. The second end of the transceiver unit is connected to the antenna. The transceiver unit is used to receive the received signal and transmit the transmitted signal through the antenna.

[0029] In one exemplary embodiment, the switching unit includes a first switch, wherein a first end of the first switch is connected to a first end of the indoor unit, and a second end of the first switch is connected to a first end of each of the at least two signal processing units. The first switch is used to control a designated signal processing unit among the at least two signal processing units to process a designated transmit / receive intermediate frequency signal corresponding to that designated signal processing unit. In one exemplary embodiment, the communication device may include multiple signal processing units, such as two, three, or four signal processing units, wherein each signal processing unit includes a filtering unit, a transmit signal processing unit, a receive signal processing unit, and a signal transceiver unit. Each signal processing unit is connected to the first switch. For example, the first end of a signal processing unit may be the first end of a filtering unit included in that signal processing unit; in this case, the first switch is connected to the filtering unit in each signal processing unit, i.e., the first switch is connected to two, three, four, or more filtering units.

[0030] In an exemplary embodiment, where different signal processing units each include different filtering units, and the different signal processing units share a transmit signal processing unit, a receive signal processing unit, and a signal transceiver unit, the switching unit, in addition to the aforementioned first switch, further includes:

[0031] First shared switch, second shared switch;

[0032] The first terminal of the first common switch is connected to the second terminal of each of the filtering units, and the second terminal of the first common switch is connected to the first terminal of the transmitting signal processing unit.

[0033] The first terminal of the second common switch is connected to the second terminal of each of the filtering units, and the second terminal of the second common switch is connected to the first terminal of the receiving signal processing unit.

[0034] The first common switch is used to control the designated filtering unit to output the transmission signal to be processed to the transmission signal processing unit, and the second common switch is used to control the designated filtering unit to receive the processed reception signal sent by the reception signal processing unit. The designated filtering unit is one of the different filtering units.

[0035] In one exemplary embodiment, the filtering unit in the communication device described in this embodiment can be two or more, such as three, four, or five. One filtering unit can selectively receive intermediate frequency (IF) signals and selectively transmit IF signals.

[0036] In one exemplary embodiment, the transmit signal processing unit includes: a transmit gain controller, a transmit intermediate frequency upconverter, a first variable gain amplifier, a microwave upconverter, and a power amplifier connected in sequence; wherein the power amplifier is connected to the signal transceiver unit, the transmit intermediate frequency upconverter is also connected to the intermediate frequency transmit local oscillator, and the microwave upconverter is also connected to the microwave transmit local oscillator.

[0037] In one exemplary embodiment, the receiving signal processing unit includes: a low-noise amplifier, a microwave downconverter, a second variable gain amplifier, a receiving intermediate frequency downconverter, and a receiving gain controller connected in sequence. The low-noise amplifier is connected to the signal transceiver unit, the receiving intermediate frequency downconverter is also connected to the intermediate frequency receiving local oscillator, and the microwave downconverter is also connected to the microwave receiving local oscillator.

[0038] In one exemplary embodiment, different signal processing units support different maximum bandwidths. The frequencies of the signals processed by different signal processing units do not significantly interfere with each other.

[0039] In one exemplary embodiment, the at least two signal processing units include: a first signal processing unit and a second signal processing unit, wherein the first signal processing unit is used to process a signal received at an intermediate frequency of 140 MHz and a signal transmitted at an intermediate frequency of 350 MHz; and the second signal processing unit is used to process a signal received at an intermediate frequency of 210 MHz and a signal transmitted at an intermediate frequency of 630 MHz.

[0040] This embodiment also provides a communication system. Figure 3 The structural block diagram of the communication system according to an embodiment of the present invention includes: a communication system 31, which includes the communication device 33 described in any of the above-mentioned claims, and will not be described again here.

[0041] Example Implementation

[0042] This invention relates to the field of communications, specifically to an intermediate frequency (IF) of a split-type digital microwave system communication device. In this embodiment, the communication device can arbitrarily select between two sets of IF frequencies.

[0043] For example, this embodiment includes the following structure:

[0044] The communication device in this embodiment includes an indoor unit and an outdoor unit, which are connected. The outdoor unit is connected to an antenna. The outdoor unit includes a switch unit, a control unit, and at least two signal processing units. Each signal processing unit processes a set of transmit and receive intermediate frequency (IF) signals, and different signal processing units process signals with different IF frequencies. The control unit sends a control signal to the switch unit to control one of the at least two signal processing units to connect between the indoor unit and the antenna. The signal processing units process the transmit and receive signals between the indoor unit and the antenna.

[0045] For example, the switching unit may include a first switch, wherein the first switch is disposed between a first end of the indoor unit and a first end of each of the at least two signal processing units, the first switch being used to receive a control signal sent by the control unit to enable a designated signal processing unit of the at least two signal processing units to connect between the indoor unit and the antenna.

[0046] Through the first switch, the controller can control which of the at least two signal processing units connects between the indoor unit and the antenna for signal processing. This improves the flexibility of the communication device, enabling it to process different sets of transmit and receive intermediate frequency (IF) signals, making it suitable for various application scenarios. Furthermore, since different signal processing units can process different sets of transmit and receive IF signals, and different sets of transmit and receive IF signals can correspond to different bandwidths, the communication device provided in this embodiment can also support different bandwidths.

[0047] For example, the N-type connectors of the IDU and ODU are connected via an RF cable.

[0048] For example, Figure 4 This is a schematic diagram of the structure of a signal processing unit according to an embodiment of the present invention, such as... Figure 4 As shown, each signal processing unit may include the following structure:

[0049] The IDU's transmit signal enters the ODU through an N-type connector, then passes through filter 1 (Multiplexer, MUX) to the transmit automatic gain control 12 to control the input intermediate frequency power. The transmit intermediate frequency upconverter 13 then converts the intermediate frequency signal to the transmit second intermediate frequency (generally 2G-4G). The output power is controlled by the variable gain amplifier 14. The transmit second intermediate frequency signal enters the microwave upconverter 15 to be converted to the microwave frequency. This microwave signal is amplified by the power amplifier 16 and then transmitted to the antenna end through the microwave duplexer 17.

[0050] The microwave signal received at the antenna end is input to the low-noise amplifier 18 through the microwave duplexer 17. The low-noise amplifier 18 transmits the microwave signal to the microwave downconverter 19. The microwave downconverter 19 converts the microwave signal to the receiving second intermediate frequency (typically 1G-3G). The receiving second intermediate frequency signal is controlled by the variable gain amplifier 20. The receiving second intermediate frequency signal enters the receiving intermediate frequency downconverter 21, which converts the receiving second intermediate frequency signal to the receiving intermediate frequency. The receiving intermediate frequency signal is further controlled by the receiving automatic gain control 22. The receiving intermediate frequency signal enters the MUX filter 1 and is transmitted to the IDU through the N-type connector 11. For example, four local oscillators can provide local oscillator signals to four mixers respectively. Specifically, the intermediate frequency transmitting local oscillator 3 provides a local oscillator signal to the transmitting intermediate frequency up-converter 13, the microwave transmitting local oscillator 4 provides a local oscillator signal to the microwave up-converter 15, the microwave receiving local oscillator 5 provides a local oscillator signal to the microwave down-converter 19, and the intermediate frequency receiving local oscillator 6 provides a local oscillator signal to the receiving intermediate frequency down-converter 21.

[0051] For example, this embodiment also provides a communication device. Figure 5 This is a schematic diagram of the structure of a communication device according to an embodiment of the present invention, such as... Figure 5 As shown, it includes:

[0052] The unit consists of an indoor unit and an outdoor unit. In the outdoor unit, three switches are added to the input and output terminals of the MUX filter to select and switch between MUX filter 1 and MUX filter 2 according to the different intermediate frequency of the IDU input.

[0053] Based on the IDU's transmit and receive intermediate frequency (IF) frequencies, switches 7, 8, and 9 select whether to switch to MUX filter 1 or MUX filter 2. The switching behavior of these three switches is consistent: if switched to MUX filter 1, all switches will switch to MUX filter 1; if switched to MUX filter 2, all switches will switch to MUX filter 2. If the IDU supports IF frequencies of 350MHz / 140MHz, all three switches will switch to MUX filter 1; if the IDU supports IF frequencies of 630MHz / 210MHz, all three switches will switch to MUX filter 2.

[0054] When the IDU transmission frequency is 350MHz, switch 7 switches to MUX filter 1, see... Figure 5 The 350MHz intermediate frequency signal enters switch 8 through the 350MHz transmission channel of MUX filter 1. At this time, switch 8 switches to MUX filter 1. The transmission intermediate frequency signal is controlled by the automatic gain control 12 to achieve input power control, and then enters the transmission intermediate frequency upconverter 13 to convert the 350MHz transmission intermediate frequency signal to the transmission second intermediate frequency (generally 2G-4G). Then, the output power is controlled by the variable gain amplifier 14. The transmission second intermediate frequency signal enters the microwave upconverter 15 to be converted to the microwave frequency. The microwave signal is amplified by the power amplifier 16 and then transmitted to the antenna end through the microwave duplexer 17. The microwave signal received at the antenna end is input to the low-noise amplifier 18 through the microwave duplexer 17. The low-noise amplifier 18 transmits the microwave signal to the microwave downconverter 19. The microwave downconverter 19 converts the microwave signal to the receiving second intermediate frequency (typically 1G-3G). The receiving second intermediate frequency signal is controlled by the variable gain amplifier 20. The receiving second intermediate frequency signal enters the receiving intermediate frequency downconverter 21, which converts the signal to a 140M intermediate frequency. The 140M intermediate frequency signal is further controlled by the receiving automatic gain control 22. The receiving 140M signal enters the switch 9. The switch 9 selects the MUX filter 1. The 140M received signal enters the switch 7 through the MUX filter 1, and then is sent to the IDU through the N-type connector 11.

[0055] When the IDU transmission frequency is 630MHz, switch 7 switches to MUX filter 2, see... Figure 3The 630M intermediate frequency signal enters the switch 8 through the 630M transmission channel of the MUX filter 2. At this time, the switch 8 switches to the MUX filter 2. The 630M transmission intermediate frequency signal is controlled by the automatic gain control 12 to achieve input power control. Then it enters the transmission intermediate frequency upconverter 13 to convert the 630M transmission intermediate frequency signal to the transmission second intermediate frequency (usually 2G-4G). Then the output power is controlled by the variable gain amplifier 14. The transmission second intermediate frequency signal enters the microwave upconverter 15 to be converted to the microwave frequency. The microwave signal is amplified by the power amplifier 16 and then transmitted to the antenna end through the microwave duplexer 17. The microwave signal received at the antenna end is input to the low-noise amplifier 18 through the microwave duplexer 17. The low-noise amplifier 18 transmits the microwave signal to the microwave downconverter 19. The microwave downconverter 19 converts the microwave signal to the receiving second intermediate frequency (typically 1G-3G). The receiving second intermediate frequency signal is controlled by the variable gain amplifier 20. The receiving second intermediate frequency signal enters the receiving intermediate frequency downconverter 21, which converts the signal to a 210M intermediate frequency. The 210M intermediate frequency signal is further controlled by the receiving automatic gain control 22. The receiving 210M signal enters the switch 9. The switch 9 selects the MUX filter 2. The 210M received signal enters the switch 7 through the MUX filter 2, and is then sent to the IDU through the N-type connector 11.

[0056] Four local oscillators provide local oscillator signals to four mixers: IF transmitter local oscillator 3 provides the signal to transmitter IF up-converter 13; microwave transmitter local oscillator 4 provides the signal to microwave up-converter 15; microwave receiver local oscillator 5 provides the signal to microwave down-converter 19; and IF receiver local oscillator 6 provides the signal to receiver IF down-converter 21. For transmission, when the transmitter IF frequency is 350MHz and 630MHz, the frequency of the transmitter local oscillator 3 varies to ensure that the output frequency of the transmitter IF up-converter 13 is the same for both 350MHz and 630MHz inputs. Similarly, the frequency of the microwave transmitter local oscillator 4 remains the same for both 350MHz and 630MHz inputs. For receiving, when the receiving intermediate frequency is 140M and 210M respectively, the frequency of the microwave receiving local oscillator 5 is the same to ensure that the output frequency of the microwave downconverter 19 is the same. The frequency of the intermediate frequency receiving local oscillator 6 is different to ensure that the output frequency of the receiving intermediate frequency downconverter 21 is 140M and 210M respectively.

[0057] For example, embodiments of the present invention are used in microwave point-to-point communication equipment, specifically in 6G to 42G microwave outdoor unit (ODU) products. Specific embodiments are as follows:

[0058] For example, when the IDU transmission frequency is 350MHz, switch 7 switches to MUX filter 1. The 350MHz intermediate frequency signal enters switch 8 through the 350MHz transmission channel of MUX filter 1. At this time, switch 8 switches to MUX filter 1, and the transmitted intermediate frequency signal passes through the transmission channel and is transmitted to the antenna end through microwave duplexer 17. The microwave signal received at the antenna end enters the receiving channel through microwave duplexer 17, where the signal is frequency-converted to 140MHz intermediate frequency. The received 140MHz signal enters switch 9, which selects MUX filter 1. The 140MHz signal passes through MUX filter 1 and enters switch 7, and then is sent to the IDU through N-type connector 11.

[0059] For example, when the IDU transmission frequency is 630MHz, switch 7 switches to MUX filter 2. The 630MHz intermediate frequency signal enters switch 8 through the 630MHz transmission channel of MUX filter 2. At this time, switch 8 switches to MUX filter 2, and the transmitted intermediate frequency signal passes through the transmission channel and is transmitted to the antenna end through microwave duplexer 17. The microwave signal received at the antenna end enters the receiving channel through microwave duplexer 17, where the signal is frequency-converted to 210MHz intermediate frequency. The received 210MHz signal enters switch 9, which selects MUX filter 2. The 210MHz signal passes through MUX filter 2 and enters switch 7, and then is sent to the IDU through N-type connector 11.

[0060] With the requirement for ODU support of a bandwidth of BW (bandwidth) = 224 MHz, the 350 MHz and 140 MHz intermediate frequency (IF) frequencies will not be able to meet this requirement. The reason is that the system has certain requirements for the transmit / receive suppression of the 350 MHz transmit and 140 MHz receive signals at the MUX filter 1. At a bandwidth of BW = 224 MHz, the transmit and receive signal frequencies partially overlap, and the MUX filter cannot meet the required transmit / receive suppression. Therefore, the maximum bandwidth supported by the 350 MHz and 140 MHz IF frequencies is BW = 112 MHz, which cannot support the bandwidth requirement of BW = 240 MHz. Therefore, a new set of IF frequencies is needed that can support a bandwidth of BW = 224 MHz while meeting the transmit / receive suppression requirements.

[0061] This embodiment proposes a new set of intermediate frequency (IF) frequencies: a transmitting IF of 630 MHz and a receiving IF of 210 MHz. This meets the bandwidth requirement of 224 MHz bandwidth (BW), solving the problem that traditional IF frequencies cannot support a BW of 224 MHz.

[0062] This embodiment allows users to freely choose between two intermediate frequencies: 630M / 210M and 350M / 140M. This ensures that the ODU can support both the older 350M / 140M intermediate frequency version of the IDU and the newer 630M / 210M version with a large bandwidth of BW=224M.

[0063] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A communication apparatus comprising an indoor unit and an outdoor unit, wherein, The indoor unit is connected with the outdoor unit, and the outdoor unit is connected with an antenna, and the outdoor unit comprises: a switch unit and at least two signal processing units; one signal processing unit is used for processing a group of transceiving intermediate frequency signals, different signal processing units process signals with different transceiving intermediate frequencies, and different signal processing units support different maximum bandwidths; the switch unit is used for controlling a specified signal processing unit in the at least two signal processing units to process a specified transceiving intermediate frequency signal corresponding to the specified signal processing unit; in the case that different signal processing units respectively comprise different filter units, and different signal processing units share a transmitting signal processing unit, a receiving signal processing unit and a signal transceiving unit, the switch unit further comprises: a first shared switch and a second shared switch; a first end of the first shared switch is connected with a second end of each filter unit, and a second end of the first shared switch is connected with a first end of the transmitting signal processing unit; a first end of the second shared switch is connected with a second end of each filter unit, and a second end of the second shared switch is connected with a first end of the receiving signal processing unit; the first shared switch is used for controlling a specified filter unit to output a to-be-processed transmitting signal to the transmitting signal processing unit, and the second shared switch is used for controlling the specified filter unit to receive a processed receiving signal sent by the receiving signal processing unit, the specified filter unit being one of the different filter units; a first end of each filter unit is connected with a first end of the indoor unit, and is used for selecting a receiving signal with a receiving intermediate frequency and selecting a transmitting signal with a transmitting intermediate frequency; a first end of the transmitting signal processing unit and a first end of the receiving signal processing unit are respectively connected with a second end of each filter unit, the transmitting signal processing unit is used for processing the transmitting signal, and the receiving signal processing unit is used for processing the receiving signal; a first end of the signal transceiving unit is respectively connected with a second end of the transmitting signal processing unit and a second end of the receiving signal processing unit, and a second end of the signal transceiving unit is connected with the antenna, the signal transceiving unit is used for receiving the receiving signal through the antenna and sending the transmitting signal through the antenna.

2. The communication device of claim 1, wherein, Further comprising: a control unit used for sending a control signal to the switch unit to control opening and closing of the switch unit.

3. The communication device of claim 1, wherein, The switch unit comprises: a first switch, wherein a first end of the first switch is connected with a first end of the indoor unit, a second end of the first switch is respectively connected with a first end of each signal processing unit in the at least two signal processing units, and the first switch is used for controlling a specified signal processing unit in the at least two signal processing units to process a specified transceiving intermediate frequency signal corresponding to the specified signal processing unit.

4. The communication device of claim 1, wherein, The transmitting signal processing unit comprises: The transmitter gain controller, the transmitter intermediate frequency upconverter, the first variable gain amplifier, the microwave upconverter, and the power amplifier are sequentially connected.

5. The communication device of claim 4, wherein, The receiving signal processing unit comprises: The low noise amplifier, the microwave downconverter, the second variable gain amplifier, the receiving intermediate frequency downconverter, and the receiving gain controller are sequentially connected.

6. The communication device according to any one of claims 1 to 3, characterized by The at least two signal processing units comprise a first signal processing unit and a second signal processing unit, wherein the first signal processing unit is used for processing signals of the receiving intermediate frequency 140M and signals of the transmitting intermediate frequency 350M; and the second signal processing unit is used for processing signals of the receiving intermediate frequency 210M and signals of the transmitting intermediate frequency 630M.

7. A communication system, characterized by The communication device according to any one of claims 1 to 6. The communication device according to any one of claims 1 to 6.

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