Transceiver with dual-mode receiving function

Abstract

According to the dual-mode receiving transceiver provided by the embodiment of the invention, a signal transmitted by an antenna is preprocessed by adopting a TDD (Time Division Duplexing) and / or FDD (Frequency Division Duplexing) mode through a dual-mode receiving link to obtain an analog signal, and the analog signal is processed by the transceiver to obtain a digital receiving signal. And the digital signal processing module processes the received digital signal to obtain received data. The digital signal processing module processes data to be transmitted to obtain a digital transmitting signal, and the transceiver processes the digital transmitting signal to obtain an analog transmitting signal. And the transmitting link performs transmitting preprocessing on the analog transmitting signal, and inputs the preprocessed signal into the antenna. The technical problem that the working mode of the transceiver is single in the existing communication technology can be solved, the adaptability of the transceiver to different application scenes is improved, and the flexible configuration of the working mode of the transceiver is realized.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a dual-mode receiving transceiver. Background Art

[0002] Communication technology is changing with each passing day, which has a comprehensive impact on people's daily life, work and safety. There are two duplex communication modes in existing communication technology: TDD (Time-division Duplex) and FDD (Frequency-division Duplex). In the mobile communication system of TDD mode, the transmission and reception share a radio frequency point, and the downward transmission of information and the upward transmission of information use a channel. The uplink and downlink use different time slots for communication. In the mobile communication system of FDD mode, different radio frequency points are used for communication, and information is transmitted downward and upward through two independent channels respectively. In order to prevent mutual interference between adjacent transmitters and receivers, a protection band is provided between the two channels.

[0003] Traditional RF receiving link solutions can only be used for FDD or TDD transceiver signal processing. For some multi-frequency and multi-mode receiving scenarios in modern communications, this single-mode RF receiving link solution is often limited in application and lacks flexibility. Summary of the invention

[0004] The purpose of the embodiment of the present invention is to provide a dual-mode receiving transceiver to achieve flexible configuration of the transceiver working mode. The specific technical solution is as follows:

[0005] The embodiment of the present invention provides a dual-mode receiving transceiver, comprising: an antenna, a dual-mode receiving link, a transmitting link, a transceiver, and a digital signal processing module;

[0006] The antenna is used to receive and / or send signals;

[0007] The dual-mode receiving link is used to perform receiving preprocessing on the signal received by the antenna in TDD and / or FDD mode to obtain an analog receiving signal;

[0008] The transceiver is used to process the analog received signal to obtain a digital received signal;

[0009] The digital signal processing module is used to process the digital received signal to obtain received data;

[0010] The digital signal processing module is further used to process the data to be sent to obtain a digital transmission signal;

[0011] The transceiver is further used to process the digital transmission signal to obtain an analog transmission signal;

[0012] The transmission link is used to perform transmission preprocessing on the analog transmission signal and input the preprocessed signal into the antenna.

[0013] In a possible embodiment, the transceiver further includes a duplexer and a circulator;

[0014] The transceiver is a narrowband transceiver;

[0015] The dual-mode receiving link includes: a first receiving sub-link, a second receiving sub-link, a radio frequency switch, and a small signal amplifier;

[0016] The antenna is connected to the common port of the duplexer, the first port of the circulator is connected to the output port of the transmission link, the second port of the circulator is connected to the second non-common port of the duplexer, the third port of the circulator is connected to the input port of the second receiving sub-link, the first non-common port of the duplexer is connected to the input port of the first receiving sub-link, the first selection port of the RF switch is connected to the output port of the first receiving sub-link, the second selection port of the RF switch is connected to the output port of the second receiving sub-link, the input port of the small signal amplifier is connected to the output port of the RF switch, the RF input port of the transceiver is connected to the output port of the small signal amplifier, the input port of the digital signal processing module is connected to the digital output port of the transceiver, the digital input port of the transceiver is connected to the output port of the digital signal processing module, and the RF output port of the transceiver is connected to the input port of the transmission link;

[0017] The first receiving sublink includes a first LNA and a first receiving filter; an input port of the first LNA is connected to a first non-common port of the duplexer, an output port of the first LNA is connected to an input end of the first receiving filter, and an output end of the first receiving filter is connected to a first gate port of the RF switch;

[0018] The second receiving sub-link includes a high-power switch, a second LNA, a load, and a second receiving filter; the input port of the high-power switch is connected to the third port of the circulator, the second strobe port of the high-power switch is connected to the input port of the second LNA, the first strobe port of the high-power switch is connected to the input port of the load, the output port of the second LNA is connected to the input end of the second receiving filter, and the output end of the second receiving filter is connected to the second strobe port of the RF switch;

[0019] The transmission chain includes a driver amplifier and a power amplifier; the input port of the driver amplifier is connected to the RF output port of the transceiver, the output port of the driver amplifier is connected to the input port of the power amplifier, and the output port of the power amplifier is connected to the first port of the circulator.

[0020] In a possible embodiment, the transceiver has two working modes:

[0021] When working in FDD mode, the RF switch switches on the first receiving sublink, the high-power switch switches on the load, and the first LNA is in working state;

[0022] When working in TDD mode, the RF switch enables the second receiving sub-link, and in a receiving time slot, the high-power switch enables the second LNA, the second LNA is in an operating state, and the driving amplifier and the power amplifier are in an off state; in a transmitting time slot, the high-power switch enables the load, the driving amplifier and the power amplifier are in an operating state, and the second LNA is in an off state.

[0023] In a possible embodiment, the transceiver further includes a duplexer and a circulator;

[0024] The transceiver is a broadband transceiver;

[0025] The dual-mode receiving link includes: a first receiving sub-link, a second receiving sub-link, a radio frequency switch, a combiner, and a small signal amplifier;

[0026] The antenna is connected to the common port of the duplexer, the first port of the circulator is connected to the output port of the transmission link, the second port of the circulator is connected to the second non-common port of the duplexer, the third port of the circulator is connected to the input port of the second receiving sub-link, the first non-common port of the duplexer is connected to the input port of the first receiving sub-link, the first input port of the combiner is connected to the output port of the first receiving sub-link, the second input port of the combiner is connected to the output port of the second receiving sub-link, the input port of the small signal amplifier is connected to the output port of the combiner, the RF input port of the transceiver is connected to the output port of the small signal amplifier, the input port of the digital signal processing module is connected to the digital output port of the transceiver, the digital input port of the transceiver is connected to the output port of the digital signal processing module, and the RF output port of the transceiver is connected to the input port of the transmission link;

[0027] The first receiving sublink includes a first LNA; an input port of the first LNA is connected to a first non-common port of the duplexer, and an output port of the first LNA is connected to a first input port of the combiner;

[0028] The second receiving sublink includes a high-power switch, a second LNA, a first load, a radio frequency switch, and a second load; an input port of the high-power switch is connected to the third port of the circulator, a second strobe port of the high-power switch is connected to the input port of the second LNA, a first strobe port of the high-power switch is connected to the input port of the first load, an output port of the second LNA is connected to the second strobe port of the radio frequency switch, an output port of the second load is connected to the first strobe port of the radio frequency switch, and an output port of the radio frequency switch is connected to the second input port of the combiner;

[0029] The transmission chain includes a driver amplifier and a power amplifier; the input port of the driver amplifier is connected to the RF output port of the transceiver, the output port of the driver amplifier is connected to the input port of the power amplifier, and the output port of the power amplifier is connected to the first port of the circulator.

[0030] In a possible embodiment, the operating mode of the transceiver is:

[0031] The first receiving sublink operates in an FDD mode, and the second receiving sublink operates in a TDD mode;

[0032] When the second receiving sub-link operates in TDD mode, in a receiving time slot, the RF switch and the high-power switch enable the second LNA, the second LNA is in an operating state, and the driving amplifier and the power amplifier are in an off state; in a transmitting time slot, the high-power switch enables the first load, the RF switch enables the second load, the driving amplifier and the power amplifier are in an operating state, and the second LNA is in an off state.

[0033] In a possible embodiment, the transceiver further includes: a dual-frequency receiving antenna filter;

[0034] The antenna includes a transmitting antenna and a receiving antenna;

[0035] The transmission chain includes a driving amplifier, a power amplifier, an isolator, and a transmitting antenna filter; the input port of the driving amplifier is connected to the RF output port of the transceiver, the output port of the driving amplifier is connected to the input port of the power amplifier, the output port of the power amplifier is connected to the first port of the isolator, the second port of the isolator is connected to the first port of the transmitting antenna filter, and the second port of the transmitting antenna filter is connected to the transmitting antenna;

[0036] The dual-mode receiving link comprises: a combiner, a small signal amplifier, a first receiving sub-link and a second receiving sub-link;

[0037] The receiving antenna is connected to the input port of the dual-frequency receiving antenna filter, the first output port of the dual-frequency receiving antenna filter is connected to the input port of the first receiving sub-link, the second output port of the dual-frequency receiving antenna filter is connected to the input port of the second receiving sub-link, the first input port of the combiner is connected to the output port of the first receiving sub-link, the second input port of the combiner is connected to the output port of the second receiving sub-link, the input port of the small signal amplifier is connected to the output port of the combiner, the RF input port of the transceiver is connected to the output port of the small signal amplifier, the input port of the digital signal processing module is connected to the digital output port of the transceiver, the digital input port of the transceiver is connected to the output port of the digital signal processing module, the RF output port of the transceiver is connected to the input port of the transmitting link, and the output port of the transmitting link is connected to the transmitting antenna;

[0038] The first receiving sublink includes a first LNA; an input port of the first LNA is connected to a first output port of the dual-frequency receiving antenna filter, and an output port of the first LNA is connected to a first input port of the combiner;

[0039] The second receiving sub-link includes a second LNA, a RF switch, and a load; the input port of the second LNA is connected to the second output port of the dual-band receiving antenna filter, the output port of the second LNA is connected to the second enable port of the RF switch, the output port of the load is connected to the first enable port of the RF switch, and the output port of the RF switch is connected to the second input port of the combiner.

[0040] In a possible embodiment, the operating mode of the transceiver is:

[0041] The first receiving sublink operates in an FDD mode, and the second receiving sublink operates in a TDD mode;

[0042] When the second receiving sub-link operates in TDD mode, in a receiving time slot, the RF switch turns on the second LNA, and the second LNA is in a working state; in a transmitting time slot, the RF switch turns on the load, and the second LNA is in a closed state.

[0043] In a possible embodiment, the transceiver further includes a dual-frequency filter and a circulator;

[0044] The antenna includes an FDD antenna and a TDD antenna;

[0045] The dual-mode receiving link comprises: a combiner, a small signal amplifier, a first receiving sub-link and a second receiving sub-link;

[0046] The TDD antenna is connected to the first input port of the dual-frequency filter, the FDD antenna is connected to the second input port of the dual-frequency filter, the first output port of the dual-frequency filter is connected to the input end of the first receiving sub-link, the second output port of the dual-frequency filter is connected to the second port of the circulator, the third port of the circulator is connected to the input port of the second receiving sub-link, the first port of the circulator is connected to the output port of the transmitting link, the first input port of the combiner is connected to the output port of the first receiving sub-link, the second input port of the combiner is connected to the output port of the second receiving sub-link, the input port of the small signal amplifier is connected to the output port of the combiner, the RF input port of the transceiver is connected to the output port of the small signal amplifier, the input port of the digital signal processing module is connected to the digital output port of the transceiver, the digital input port of the transceiver is connected to the output port of the digital signal processing module, and the RF output port of the transceiver is connected to the input port of the transmitting link;

[0047] The first receiving sublink includes a first LNA; an input port of the first LNA is connected to a first output port of the dual-frequency filter, and an output port of the first LNA is connected to a first input port of the combiner;

[0048] The second receiving sublink includes a high-power switch, a second LNA, a first load, a radio frequency switch, and a second load; an input port of the high-power switch is connected to the third port of the circulator, an input port of the second LNA is connected to the second gate port of the high-power switch, an input port of the first load is connected to the first gate port of the high-power switch, an output port of the second LNA is connected to the second gate port of the radio frequency switch, an output port of the second load is connected to the first gate port of the radio frequency switch, and an output port of the radio frequency switch is connected to the second input port of the combiner;

[0049] The transmission chain includes a driver amplifier and a power amplifier; the input port of the driver amplifier is connected to the RF output port of the transceiver, the output port of the driver amplifier is connected to the input port of the power amplifier, and the output port of the power amplifier is connected to the first port of the circulator.

[0050] In a possible embodiment, the working mode of the transceiver is:

[0051] The first receiving sublink operates in an FDD mode, and the second receiving sublink operates in a TDD mode;

[0052] When the second receiving sub-link operates in TDD mode, in a receiving time slot, the high-power switch enables the second LNA, the RF switch enables the second LNA, the second LNA is in an operating state, and the driving amplifier and the power amplifier are in an off state; in a transmitting time slot, the high-power switch enables the first load, the RF switch enables the second load, the driving amplifier and the power amplifier are in an operating state, and the second LNA is in an off state.

[0053] In a possible embodiment, the first receiving sub-link further includes a first filter; an input port of the first filter is connected to an output port of the first LNA, and an output port of the first filter is connected to a first input port of the combiner;

[0054] The second sub-receiving chain also includes a second filter; an input port of the second filter is connected to an output port of the second LNA, and an output port of the second filter is connected to a second enable port of the RF switch.

[0055] Beneficial effects of the embodiments of the present invention:

[0056] In an embodiment of the present invention, the signal received by the antenna can be preprocessed by using the TDD and / or FDD mode through a dual-mode receiving link, and then processed by the transceiver and the digital signal processing module to obtain received data. The digital signal processing module processes the data to be sent to obtain a digital transmission signal, which is further processed by the transceiver to obtain an analog transmission signal, and then the transmission link performs transmission preprocessing on the analog transmission signal, and inputs the preprocessed signal into the antenna. Compared with the prior art, the transceiver can often only receive and transmit signals in FDD mode or TDD mode. The present application provides a dual-mode receiving transceiver, which can use the TDD mode, or the FDD mode, or both the TDD mode and the FDD mode to receive and process signals through a dual-mode receiving link, so as to solve the technical problem of a single transceiver working mode in the existing communication technology, increase the adaptability of the transceiver to different application scenarios, and realize the flexible configuration of the transceiver working mode.

[0057] Of course, it is not necessary to achieve all of the advantages described above at the same time to implement any product or method of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments can also be obtained based on these drawings.

[0059] Figure 1 A schematic diagram of the structure of a dual-mode receiving transceiver provided in an embodiment of the present invention;

[0060] Figure 2 A schematic diagram of the structure of a transceiver for dual-mode reception under narrowband transceiver conditions provided by an embodiment of the present invention;

[0061] Figure 3 A schematic diagram of a structure of a dual-mode receiving transceiver under broadband transceiver conditions provided by an embodiment of the present invention;

[0062] Figure 4 A schematic diagram of the structure of a transceiver for dual-mode reception under the condition of separate transmitting and receiving antennas provided in an embodiment of the present invention;

[0063] Figure 5 A schematic diagram of the structure of a transceiver for dual-mode reception under TDD and FDD separate antenna conditions provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0064] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field based on this application belong to the scope of protection of the present invention.

[0065] The existing transceiver RF receiving link solution can usually only be used for FDD or TDD transceiver signal processing. The transceiver has a single working mode, lacks flexibility, and has very limited application scenarios.

[0066] In order to solve the above technical problems, the present application proposes a dual-mode receiving transceiver. Figure 1 A structural schematic diagram of a dual-mode receiving transceiver provided in an embodiment of the present invention includes an antenna 101, a dual-mode receiving link 102, a transceiver 103, a digital signal processing module 104, and a transmitting link 105.

[0067] Antenna 101 is used to receive and / or send signals.

[0068] Applied to different scenarios, the antenna 101 in the present application solution can be an antenna that receives and sends signals in one body. In a scenario where the receiving and sending signals cannot share one antenna, the antenna 101 in the present application solution can also be two separate antennas for receiving and sending, that is, the antenna can include a receiving antenna and a transmitting antenna. Or in a scenario where TDD and FDD cannot share one antenna, the antenna 101 in the present application solution can also be two separate antennas for FDD and TDD, that is, the antenna can include an FDD antenna and a TDD antenna.

[0069] The dual-mode receiving link 102 is used to perform receiving preprocessing on the signal received by the antenna in TDD and / or FDD mode to obtain an analog receiving signal.

[0070] Specifically, the dual-mode receiving link 102 has two receiving sub-links, which are used for FDD and TDD modes respectively. By gating the receiving sub-link for TDD mode, the working mode of the transceiver can be configured to TDD mode. By gating the receiving sub-link for FDD mode, the working mode of the transceiver can be configured to FDD mode. By gating the two receiving sub-links for TDD mode and FDD mode at the same time, the working mode of the transceiver can be configured to TDD mode and FDD mode.

[0071] The transceiver 103 is used to process the analog received signal to obtain a digital received signal.

[0072] The transceiver 103 is a communication device that can receive analog signals and convert them into digital signals, or convert digital signals into analog signals for transmission. The transceiver 103 can also select a specific frequency band to be transmitted or received by adjusting the frequency.

[0073] The digital signal processing module 104 is used to process the digital received signal to obtain received data.

[0074] The digital signal processing module 104 can perform data-to-signal conversion, and can convert a received digital reception signal into reception data, or convert the data into a digital transmission signal to be sent.

[0075] The digital signal processing module 104 is further used to process the data to be transmitted to obtain a digital transmission signal.

[0076] The transceiver 103 is also used to process the digital transmission signal to obtain an analog transmission signal.

[0077] The transmission link 105 is used to perform transmission preprocessing on the analog transmission signal and input the preprocessed signal to the antenna.

[0078] Because in TDD mode, the receiving and sending of signals need to be performed in different time slots. Therefore, in TDD mode, in the dual-mode receiving link 102, the receiving sub-link and the transmitting link 105 for the TDD mode need to work in different time slots, that is, they cannot be in working state at the same time. In FDD mode, the receiving and sending of signals can be performed in the same time slot through two independent channels. Therefore, in FDD mode, in the dual-mode receiving link 102, the receiving sub-link and the transmitting link 105 for the FDD mode can work in the same time slot, that is, they can be in working state at the same time.

[0079] It can be seen that in the embodiment of the present invention, the TDD and / or FDD mode can be adopted through the dual-mode receiving link to pre-process the signal received by the antenna, and then the signal is processed by the transceiver and the digital signal processing module to obtain the received data. The digital signal processing module processes the data to be sent to obtain a digital transmission signal, which is further processed by the transceiver to obtain an analog transmission signal, and then the transmission link performs transmission pre-processing on the analog transmission signal, and inputs the pre-processed signal into the antenna. Compared with the prior art, the transceiver can often only receive and transmit signals in FDD mode or TDD mode. The dual-mode receiving transceiver provided by the present application scheme can adopt TDD mode, FDD mode, or TDD mode and FDD mode for signal reception and processing through the dual-mode receiving link to solve the technical problem of the single working mode of the transceiver in the existing communication technology, increase the adaptability of the transceiver to different application scenarios, and realize the flexible configuration of the working mode of the transceiver.

[0080] When the transceiver is a narrowband transceiver, for the narrowband transceiver, the present application provides a dual-mode receiving transceiver under the condition of a narrowband transceiver, see Figure 2 , Figure 2 A structural schematic diagram of a dual-mode receiving transceiver under narrowband transceiver conditions provided in an embodiment of the present invention, the transceiver includes an antenna 201, a dual-mode receiving link, a transceiver 212, a digital signal processing module 213, a transmitting link, a duplexer 202, and a circulator 203.

[0081] The following will explain the connection relationship between the various components and components in the dual-mode receiving transceiver under the condition of narrowband transceiver:

[0082] The dual-mode receiving link includes a first receiving sub-link, a second receiving sub-link, a radio frequency switch 210 , and a small signal amplifier 211 .

[0083] The antenna 201 is connected to the common port of the duplexer 202, the first port of the circulator 203 is connected to the output port of the transmission link, the second port of the circulator 203 is connected to the second non-common port of the duplexer 202, the third port of the circulator 203 is connected to the input port of the second receiving sub-link, the first non-common port of the duplexer 202 is connected to the input port of the first receiving sub-link, the first selection port of the RF switch 210 is connected to the output port of the first receiving sub-link, the second selection port of the RF switch 210 is connected to the output port of the second receiving sub-link, the input port of the small signal amplifier 211 is connected to the output port of the RF switch 210, the RF input port of the transceiver 212 is connected to the output port of the small signal amplifier 211, the input port of the digital signal processing module 213 is connected to the digital output port of the transceiver 212, the digital input port of the transceiver 212 is connected to the output port of the digital signal processing module 213, and the RF output port of the transceiver 212 is connected to the input port of the transmission link.

[0084] In this embodiment, the antenna 201 is an antenna that can receive and send signals in one.

[0085] The duplexer 202 includes a common port, a first non-common port, and a second non-common port, and is used to isolate the transmitted and received signals to ensure that both the reception and transmission of the signal can work normally at the same time.

[0086] The circulator 203 includes a first port, a second port, a third port and a fourth port, and is used to transmit a signal entering any port thereof to the next port in a direction sequence determined by the static bias magnetic field.

[0087] The first receiving sublink includes a first LNA (Low Noise Amplifier) ​​204 and a first receiving filter 205, wherein the input port of the first LNA 204 is connected to the first non-common port of the duplexer 202, the output port of the first LNA 204 is connected to the input end of the first receiving filter 205, and the output end of the first receiving filter 205 is connected to the first selection port of the RF switch 210. The first LNA 204 is used to amplify the received signal while minimizing the influence of noise as much as possible to ensure the quality and accuracy of the signal. The first receiving filter 205 is used to perform frequency selection on the signal, weaken or remove some unnecessary frequency components in the received signal, so that only the required frequency components are left in the signal output by the first receiving filter 205.

[0088] The second receiving sublink includes a high-power switch 206, a second LNA 207, a load 208, and a second receiving filter 209. The connection relationship is that the input port of the high-power switch 206 is connected to the third port of the circulator 203, the second selection port of the high-power switch 206 is connected to the input port of the second LNA 207, the first selection port of the high-power switch 206 is connected to the input port of the load 208, the output port of the second LNA 206 is connected to the input end of the second receiving filter 209, and the output end of the second receiving filter 209 is connected to the second selection port of the RF switch 210. Among them, by selecting the second LNA 207 or the load 208 through the high-power switch 206, it can be further selected to connect the second receiving sublink or close the second receiving sublink. The functions of the second LNA 207 and the second receiving filter 209 are the same as those of the first LNA 204 and the first receiving filter 205.

[0089] The RF switch 210 is used to switch the path, that is, the first receiving sub-link or the second receiving sub-link can be selected by controlling the RF switch 210. The RF switch 210 selects the first receiving sub-link, which means controlling the communication between the RF switch 210 and the first receiving sub-link, and blocking the communication between the RF switch 210 and the second receiving sub-link. Conversely, the RF switch 210 selects the second receiving sub-link, which means controlling the communication between the RF switch 210 and the second receiving sub-link, and blocking the communication between the RF switch 210 and the first receiving sub-link.

[0090] The small signal amplifier 211 is used to amplify the weak signal from the antenna.

[0091] The transceiver 212 is configured in narrowband mode, that is, one transceiver receiving channel can only support one frequency band receiving signal processing, and its function is the same as that of the previous transceiver 103.

[0092] The function of the digital signal processing module 213 is the same as that of the previous digital signal processing module 104 .

[0093] The transmission link includes a driver amplifier 214 and a power amplifier 215, and the signal is transmitted after passing through the driver amplifier 214 and the power amplifier 215 in sequence. The connection relationship is that the input port of the driver amplifier 214 is connected to the RF output port of the transceiver 212, the output port of the driver amplifier 214 is connected to the input port of the power amplifier 215, and the output port of the power amplifier 215 is connected to the first port of the circulator 203. Among them, the driver amplifier 214 is used to amplify the input signal to achieve the input power required by the power amplifier 215, and the power amplifier 215 is used to amplify the signal power.

[0094] The dual-mode receiving transceiver under the narrowband transceiver condition shown in this embodiment has two working modes:

[0095] When the transceiver operates in FDD mode, the transceiver 212 is configured in FDD mode, the RF switch 210 selects the first receiving sub-link, the high-power switch 206 selects the load 208, and the first LNA 204 and the first receiving filter 205 in the first receiving sub-link are in working state. The second LNA 207 in the second receiving sub-link is in a closed state. Because in the mobile communication system in FDD mode, the receiving signal and the transmitting signal are respectively carried out by two independent channels, the first receiving sub-link and the transmitting link can work simultaneously in FDD mode. Therefore, when the transceiver operates in FDD mode, the driving amplifier 214 and the power amplifier 215 in the transmitting link are also in working state.

[0096] When the transceiver operates in TDD mode, the RF switch 210 switches on the second receiving sub-link. In a mobile communication system in TDD mode, the receiving signal and the transmitting signal are performed in different time slots of the same channel. Therefore, in the receiving time slot, the high-power switch 206 switches on the second LNA 207, the second LNA 207 and the second receiving filter 209 in the second receiving sub-link are in working state, and the driving amplifier 214 and the power amplifier 215 in the transmitting link are in the off state. In the transmitting time slot, the high-power switch 206 switches on the load 208, the driving amplifier 214 and the power amplifier 215 in the transmitting link are in working state, and the second LNA 207 and the second receiving filter 209 in the second receiving sub-link are in the off state.

[0097] In this embodiment, by enabling the RF switch 210 and the high-power switch 206, it can be determined whether the transceiver transmits a signal through the first receiving sub-link or through the second receiving sub-link. When the RF switch 210 enables the first receiving sub-link, the transceiver is in FDD mode based on the first receiving sub-link. When the RF switch 210 enables the second receiving sub-link, the transceiver is in TDD mode based on the second receiving sub-link, that is, the narrowband transceiver can realize two different working modes by enabling different receiving sub-links through the RF switch 210, thereby realizing flexible configuration of the working mode of the transceiver.

[0098] For broadband transceivers, the present application provides a dual-mode receiving transceiver under broadband transceiver conditions, see Figure 3 , Figure 3 A schematic diagram of a structure of a dual-mode receiving transceiver under broadband transceiver conditions provided by an embodiment of the present invention. The dual-mode receiving transceiver under broadband transceiver conditions includes an antenna 301, a duplexer 302, a circulator 303, a dual-mode receiving link, a transceiver 312, a digital signal processing module 313, and a transmitting link.

[0099] The following will explain the connection relationship between the various components and components in the dual-mode receiving transceiver under the condition of broadband transceiver:

[0100] The dual-mode receiving link includes: a first receiving sub-link, a second receiving sub-link, a radio frequency switch 308 , a combiner 310 , and a small signal amplifier 311 .

[0101] The antenna 301 is connected to the common port of the duplexer 302, the first port of the circulator 303 is connected to the output port of the transmission link, the second port of the circulator 303 is connected to the second non-common port of the duplexer 302, the third port of the circulator 303 is connected to the input port of the second receiving sub-link, the first non-common port of the duplexer 302 is connected to the input port of the first receiving sub-link, the first input port of the combiner 310 is connected to the output port of the first receiving sub-link, the second input port of the combiner 310 is connected to the output port of the second receiving sub-link, the input port of the small signal amplifier 311 is connected to the output port of the combiner 310, the RF input port of the transceiver 312 is connected to the output port of the small signal amplifier 311, the input port of the digital signal processing module 313 is connected to the digital output port of the transceiver 312, the digital input port of the transceiver 312 is connected to the output port of the digital signal processing module 313, and the RF output port of the transceiver 312 is connected to the input port of the transmission link.

[0102] The combiner 310 is used to combine two or more signals into one signal and output it through one port. The combined signals can be of the same frequency or different frequencies. In this embodiment, the combiner can be a combiner with an internal filter, such as a heterodyne combiner, which can select the frequency of the signal, weaken or remove some unnecessary frequency components in the received signal, so that only the required frequency components are left in the signal output by the combiner. At the same time, by using a combiner with a filtering function, the device cost and PCB (Printed circuit boards) layout area can also be reduced.

[0103] The first receiving sub-link includes a first LNA 304 , and the connection relationship thereof is that an input port of the first LNA 304 is connected to a first non-common port of the duplexer 302 , and an output port of the first LNA 304 is connected to a first input port of the combiner 310 .

[0104] The second receiving sublink includes a high-power switch 305, a second LNA 306, a first load 307, a radio frequency switch 308, and a second load 309. The connection relationship is that the input port of the high-power switch 305 is connected to the third port of the circulator, the second strobe port of the high-power switch 305 is connected to the input port of the second LNA 306, the first strobe port of the high-power switch 305 is connected to the input port of the first load 307, the output port of the second LNA 306 is connected to the second strobe port of the radio frequency switch 308, the output port of the second load 309 is connected to the first strobe port of the radio frequency switch 308, and the output port of the radio frequency switch 308 is connected to the second input port of the combiner 310.

[0105] The transmission link includes a driver amplifier 314 and a power amplifier 315. The signal is transmitted after passing through the driver amplifier 314 and the power amplifier 315 in sequence. The connection relationship is that the input port of the driver amplifier 314 is connected to the RF output port of the transceiver 312, the output port of the driver amplifier 314 is connected to the input port of the power amplifier 315, and the output port of the power amplifier 315 is connected to the first port of the circulator 303.

[0106] In this embodiment, the first receiving sublink operates in FDD mode, and the second receiving sublink operates in TDD mode. In TDD mode, the transmitting signal and the receiving signal need to operate in different time slots, so during the period when the second receiving sublink operates in TDD mode, in the receiving time slot, the RF switch 308 and the high-power switch 305 both select the second LNA 306, the second receiving sublink is in the receiving working state, and the transmitting link is in the transmitting closed state. That is, the second LNA 306 is in the working state, and the driving amplifier 314 and the power amplifier 315 in the transmitting link are in the closed state. In the transmitting time slot, the high-power switch 305 selects the first load 307, and the RF switch 308 selects the second load 309, the transmitting link is in the transmitting working state, and the second receiving sublink is in the receiving closed state, that is, the driving amplifier 314 and the power amplifier 315 in the transmitting link are in the working state, and the second LNA 306 in the second receiving sublink is in the closed state.

[0107] In the dual-mode receiving transceiver under the broadband transceiver condition, when receiving a signal, if the high-power switch 305 selects the first load 307 and the RF switch 308 selects the second load 309, the broadband transceiver can receive the signal through the first receiving sub-link. If both the RF switch 308 and the high-power switch 305 select the second LNA 306, the transceiver can receive the signal through the first receiving sub-link and the second receiving sub-link. Based on this, the dual-mode receiving transceiver under the broadband transceiver condition can realize the flexible selection of the transceiver working mode by selecting the RF switch 308 and the high-power switch 305.

[0108] Because in some scenarios, due to the design requirements of the receiving channel and the transmitting channel, the receiving and transmitting signals cannot share the same antenna. For such situations, the present application provides a transceiver with dual-mode reception under the condition of separate transmitting and receiving antennas. Figure 4 , Figure 4 A schematic diagram of a structure of a transceiver for dual-mode reception under the condition of separate transmitting and receiving antennas provided in an embodiment of the present invention. The transceiver for dual-mode reception under the condition of separate transmitting and receiving antennas includes an antenna, a dual-frequency receiving antenna filter 402, a dual-mode receiving link, a transceiver 409, a digital signal processing module 410, and a transmitting link.

[0109] The following describes the connection relationship between the various components in the dual-mode receiving transceiver under the condition of separate transmitting and receiving antennas:

[0110] In this embodiment, the antenna is divided into a receiving antenna 401 and a transmitting antenna 415. The receiving antenna 401 can send the received signal to the dual-frequency receiving antenna filter 402. The transmitting antenna 415 can receive the signal sent through the transmission link and transmit the signal.

[0111] The dual-frequency receiving antenna filter 402 is used to separate signals of different frequencies when receiving signals.

[0112] The dual-mode receiving link includes a combiner 407, a small signal amplifier 408, a first receiving sub-link and a second receiving sub-link. The connection relationship is that the receiving antenna 401 is connected to the input port of the dual-frequency receiving antenna filter 402, the first output port of the dual-frequency receiving antenna filter 402 is connected to the input port of the first receiving sub-link, the second output port of the dual-frequency receiving antenna filter 402 is connected to the input port of the second receiving sub-link, the first input port of the combiner 407 is connected to the output port of the first receiving sub-link, the second input port of the combiner 407 is connected to the output port of the second receiving sub-link, the input port of the small signal amplifier 408 is connected to the output port of the combiner 407, the RF input port of the transceiver 409 is connected to the output port of the small signal amplifier 408, the input port of the digital signal processing module 410 is connected to the digital output port of the transceiver 409, the digital input port of the transceiver 409 is connected to the output port of the digital signal processing module 410, the RF output port of the transceiver 409 is connected to the input port of the transmitting link, and the output port of the transmitting link is connected to the transmitting antenna 415.

[0113] The first receiving sub-link includes a first LNA 403 . The connection relationship is that the input port of the first LNA 403 is connected to the first output port of the dual-frequency receiving antenna filter 402 , and the output port of the first LNA 403 is connected to the first input port of the combiner 407 .

[0114] The second receiving sub-link includes a second LNA 404, a radio frequency switch 405, and a load 406. The connection relationship is that the input port of the second LNA 404 is connected to the second output port of the dual-frequency receiving antenna filter 402, the output port of the second LNA 404 is connected to the second selection port of the radio frequency switch 405, the output port of the load 406 is connected to the first selection port of the radio frequency switch 405, and the output port of the radio frequency switch 405 is connected to the second input port of the combiner 407.

[0115] The transmitting chain includes a driving amplifier 411, a power amplifier 412, an isolator 413, and a transmitting antenna filter 414, and the connection relationship is that the input port of the driving amplifier 411 is connected to the RF output port of the transceiver 409, the output port of the driving amplifier 411 is connected to the input port of the power amplifier 412, the output port of the power amplifier 412 is connected to the first port of the isolator 413, the second port of the isolator 413 is connected to the first port of the transmitting antenna filter 414, and the second port of the transmitting antenna filter 414 is connected to the transmitting antenna 415.

[0116] The isolator 413 in the transmission link is used to prevent the transmission antenna filter 414 and the transmission antenna 415 from reflecting signals and damaging the power amplifier 412. The transmission antenna filter 414 can allow the received signals in certain frequency bands to pass through, while blocking or weakening the signals in other frequency bands, thereby filtering the received signals and making the signals more accurate.

[0117] In this embodiment, the first receiving sub-link operates in FDD mode, and the second receiving sub-link operates in TDD mode. During the period when the second receiving sub-link operates in TDD mode, in the receiving time slot, the RF switch 405 selects the second LNA 404, and the second LNA 404 in the second receiving sub-link is in working state. In the transmitting time slot, the RF switch 405 selects the load 406, and the second LNA 404 is in the off state. In addition, due to the transmitting and receiving antennas, the transmitting antenna 415 and the receiving antenna 401 can work independently. In the receiving time slot of the second receiving sub-link operating in TDD mode, the transmitting link does not need to be in the off state, that is, the driver amplifier 411 and the power amplifier 412 in the transmitting link can continue to be in working state.

[0118] In this embodiment, the transceiver with dual-mode reception under the condition of separate transmitting and receiving antennas supports different receiving sub-links working in different working modes. It can also synchronously receive radio frequency signals based on two receiving sub-links working in FDD mode and TDD mode, thereby realizing flexible configuration of the working mode of the transceiver with dual-mode reception under the condition of separate transmitting and receiving antennas.

[0119] In view of the scenario where TDD and FDD cannot share the same antenna due to design requirements, this application provides a transceiver with dual-mode reception under the conditions of separate TDD and FDD antennas. Figure 5 , Figure 5 A schematic diagram of a dual-mode receiving transceiver under TDD and FDD separate antenna conditions provided in an embodiment of the present invention. The dual-mode receiving transceiver under TDD and FDD separate antenna conditions includes an antenna, a dual-frequency filter 503, a circulator 504, a dual-mode receiving link, a transceiver 513, a digital signal processing module 514, and a transmitting link.

[0120] The following will explain the connection relationship between the various components of the transceiver for dual-mode reception under TDD and FDD split antenna conditions:

[0121] The antenna includes a TDD antenna 501 and an FDD antenna 502. The TDD antenna 501 is used for sending and receiving signals in the TDD mode, and the FDD antenna 502 is used for sending and receiving signals in the FDD mode.

[0122] The dual-frequency filter 503 is used to separate signals of different frequencies when receiving signals. Due to the use of TDD and FDD separation modes, the dual-frequency filter can be in the form of two antenna filters or dual-channel filters, where the FDD filter only supports reception, and the power level and linearity requirements are reduced.

[0123] The dual-mode receiving link includes: a combiner 511, a small signal amplifier 512, a first receiving sub-link and a second receiving sub-link.

[0124] The TDD antenna 501 is connected to the first input port of the dual-frequency filter 503, the FDD antenna 502 is connected to the second input port of the dual-frequency filter 503, the first output port of the dual-frequency filter 503 is connected to the input end of the first receiving sub-link, the second output port of the dual-frequency filter 503 is connected to the second port of the circulator 504, the third port of the circulator 504 is connected to the input port of the second receiving sub-link, the first port of the circulator 504 is connected to the output port of the transmitting link, the first input port of the combiner 511 is connected to the output port of the first receiving sub-link, the second input port of the combiner 511 is connected to the output port of the second receiving sub-link, the input port of the small signal amplifier 512 is connected to the output port of the combiner 511, the RF input port of the transceiver 513 is connected to the output port of the small signal amplifier 512, the input port of the digital signal processing module 514 is connected to the digital output port of the transceiver 513, the digital input port of the transceiver 513 is connected to the output port of the digital signal processing module 514, and the RF output port of the transceiver 513 is connected to the input port of the transmitting link.

[0125] The first receiving sub-link includes a first LNA 505 . An input port of the first LNA 505 is connected to a first output port of the dual-band filter 503 , and an output port of the first LNA 505 is connected to a first input port of the combiner 511 .

[0126] The second receiving sublink includes a high-power switch 506, a second LNA 507, a first load 508, a radio frequency switch 509, and a second load 510. The connection relationship is that the input port of the high-power switch 506 is connected to the third port of the circulator 504, the input port of the second LNA 507 is connected to the second gated port of the high-power switch 506, the input port of the first load 508 is connected to the first gated port of the high-power switch 506, the output port of the second LNA 507 is connected to the second gated port of the radio frequency switch 509, the output port of the second load 510 is connected to the first gated port of the radio frequency switch 509, and the output port of the radio frequency switch 509 is connected to the second input port of the combiner 511.

[0127] The transmitting chain includes a driving amplifier 515 and a power amplifier 516, and the connection relationship is that the input port of the driving amplifier 515 is connected to the RF output port of the transceiver 513, the output port of the driving amplifier 515 is connected to the input port of the power amplifier 516, and the output port of the power amplifier 516 is connected to the first port of the circulator 504.

[0128] In this embodiment, the first receiving sublink operates in FDD mode, and the second receiving sublink operates in TDD mode. During the period when the second receiving sublink operates in TDD mode, in the receiving time slot, the high power switch 506 selects the second LNA 507, the RF switch 509 selects the second LNA 507, the second LNA 507 in the second receiving sublink is in working state, and the driving amplifier 515 and the power amplifier 516 in the transmitting link are in the off state. In the transmitting time slot, the high power switch 506 selects the first load 508, the RF switch 509 selects the second load 510, the driving amplifier 515 and the power amplifier 516 are in working state, and the second LNA 507 is in the off state.

[0129] In this embodiment, for the transceiver with dual-mode reception under TDD and FDD split antenna conditions, because the first sub-receiving link and the second sub-receiving link are in different operating modes, the transceiver can receive signals based on different receiving sub-links operating in different modes, thereby realizing flexible configuration of the transceiver operating mode.

[0130] In addition, if the combiner described above is a combiner without filtering function, a first filter may be further included in the first sub-receiving chain, and the connection relationship is that the input port of the first filter is connected to the output port of the first LNA, and the output port of the first filter is connected to the first input port of the combiner. Similarly, the second sub-receiving chain may also include a second filter, and the connection relationship is that the input port of the second filter is connected to the output port of the second LNA, and the output port of the second filter is connected to the second selection port of the RF switch. The function of the first filter and the second filter is to select the frequency of the signal, so that only specific frequency components are left in the output signal of the filter, and other frequency components in the received signal are weakened or blocked.

[0131] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0132] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of protection of the present invention.

Claims

1. A dual-mode receiving transceiver, characterized in that: include: Antenna, dual-mode receiving link, transmitting link, transceiver, digital signal processing module; The antenna is used to receive and / or send signals; The dual-mode receiving link is used to perform receiving preprocessing on the signal received by the antenna in TDD and / or FDD mode to obtain an analog receiving signal; The transceiver is used to process the analog received signal to obtain a digital received signal; The digital signal processing module is used to process the digital received signal to obtain received data; The digital signal processing module is further used to process the data to be sent to obtain a digital transmission signal; The transceiver is further used to process the digital transmission signal to obtain an analog transmission signal; The transmission link is used to perform transmission preprocessing on the analog transmission signal and input the preprocessed signal into the antenna.

2. The transceiver according to claim 1, characterized in that: It also includes duplexers and circulators; The transceiver is a narrowband transceiver; The dual-mode receiving link includes: a first receiving sub-link, a second receiving sub-link, a radio frequency switch, and a small signal amplifier; The antenna is connected to the common port of the duplexer, the first port of the circulator is connected to the output port of the transmission link, the second port of the circulator is connected to the second non-common port of the duplexer, the third port of the circulator is connected to the input port of the second receiving sub-link, the first non-common port of the duplexer is connected to the input port of the first receiving sub-link, the first selection port of the RF switch is connected to the output port of the first receiving sub-link, the second selection port of the RF switch is connected to the output port of the second receiving sub-link, the input port of the small signal amplifier is connected to the output port of the RF switch, the RF input port of the transceiver is connected to the output port of the small signal amplifier, the input port of the digital signal processing module is connected to the digital output port of the transceiver, the digital input port of the transceiver is connected to the output port of the digital signal processing module, and the RF output port of the transceiver is connected to the input port of the transmission link; The first receiving sublink includes a first LNA and a first receiving filter; an input port of the first LNA is connected to a first non-common port of the duplexer, an output port of the first LNA is connected to an input end of the first receiving filter, and an output end of the first receiving filter is connected to a first gate port of the RF switch; The second receiving sub-link includes a high-power switch, a second LNA, a load, and a second receiving filter; the input port of the high-power switch is connected to the third port of the circulator, the second strobe port of the high-power switch is connected to the input port of the second LNA, the first strobe port of the high-power switch is connected to the input port of the load, the output port of the second LNA is connected to the input end of the second receiving filter, and the output end of the second receiving filter is connected to the second strobe port of the RF switch; The transmission chain includes a driver amplifier and a power amplifier; the input port of the driver amplifier is connected to the RF output port of the transceiver, the output port of the driver amplifier is connected to the input port of the power amplifier, and the output port of the power amplifier is connected to the first port of the circulator.

3. The transceiver according to claim 2, characterized in that: The transceiver has two operating modes: When working in FDD mode, the RF switch switches on the first receiving sublink, the high-power switch switches on the load, and the first LNA is in working state; When working in TDD mode, the RF switch enables the second receiving sub-link, and in a receiving time slot, the high-power switch enables the second LNA, the second LNA is in an operating state, and the driving amplifier and the power amplifier are in an off state; in a transmitting time slot, the high-power switch enables the load, the driving amplifier and the power amplifier are in an operating state, and the second LNA is in an off state.

4. The transceiver according to claim 1, characterized in that: It also includes duplexers and circulators; The transceiver is a broadband transceiver; The dual-mode receiving link includes: a first receiving sub-link, a second receiving sub-link, a radio frequency switch, a combiner, and a small signal amplifier; The antenna is connected to the common port of the duplexer, the first port of the circulator is connected to the output port of the transmission link, the second port of the circulator is connected to the second non-common port of the duplexer, the third port of the circulator is connected to the input port of the second receiving sub-link, the first non-common port of the duplexer is connected to the input port of the first receiving sub-link, the first input port of the combiner is connected to the output port of the first receiving sub-link, the second input port of the combiner is connected to the output port of the second receiving sub-link, the input port of the small signal amplifier is connected to the output port of the combiner, the RF input port of the transceiver is connected to the output port of the small signal amplifier, the input port of the digital signal processing module is connected to the digital output port of the transceiver, the digital input port of the transceiver is connected to the output port of the digital signal processing module, and the RF output port of the transceiver is connected to the input port of the transmission link; The first receiving sublink includes a first LNA; an input port of the first LNA is connected to a first non-common port of the duplexer, and an output port of the first LNA is connected to a first input port of the combiner; The second receiving sublink includes a high-power switch, a second LNA, a first load, a radio frequency switch, and a second load; an input port of the high-power switch is connected to the third port of the circulator, a second strobe port of the high-power switch is connected to the input port of the second LNA, a first strobe port of the high-power switch is connected to the input port of the first load, an output port of the second LNA is connected to the second strobe port of the radio frequency switch, an output port of the second load is connected to the first strobe port of the radio frequency switch, and an output port of the radio frequency switch is connected to the second input port of the combiner; The transmission chain includes a driver amplifier and a power amplifier; the input port of the driver amplifier is connected to the RF output port of the transceiver, the output port of the driver amplifier is connected to the input port of the power amplifier, and the output port of the power amplifier is connected to the first port of the circulator.

5. The transceiver according to claim 4, characterized in that: The working modes of the transceiver are: The first receiving sublink operates in an FDD mode, and the second receiving sublink operates in a TDD mode; When the second receiving sub-link operates in TDD mode, in a receiving time slot, the RF switch and the high-power switch enable the second LNA, the second LNA is in an operating state, and the driving amplifier and the power amplifier are in an off state; in a transmitting time slot, the high-power switch enables the first load, the RF switch enables the second load, the driving amplifier and the power amplifier are in an operating state, and the second LNA is in an off state.

6. The transceiver according to claim 1, characterized in that: Also includes: Dual-band receiving antenna filter; The antenna includes a transmitting antenna and a receiving antenna; The transmission chain includes a driving amplifier, a power amplifier, an isolator, and a transmitting antenna filter; the input port of the driving amplifier is connected to the RF output port of the transceiver, the output port of the driving amplifier is connected to the input port of the power amplifier, the output port of the power amplifier is connected to the first port of the isolator, the second port of the isolator is connected to the first port of the transmitting antenna filter, and the second port of the transmitting antenna filter is connected to the transmitting antenna; The dual-mode receiving link comprises: a combiner, a small signal amplifier, a first receiving sub-link and a second receiving sub-link; The receiving antenna is connected to the input port of the dual-frequency receiving antenna filter, the first output port of the dual-frequency receiving antenna filter is connected to the input port of the first receiving sub-link, the second output port of the dual-frequency receiving antenna filter is connected to the input port of the second receiving sub-link, the first input port of the combiner is connected to the output port of the first receiving sub-link, the second input port of the combiner is connected to the output port of the second receiving sub-link, the input port of the small signal amplifier is connected to the output port of the combiner, the RF input port of the transceiver is connected to the output port of the small signal amplifier, the input port of the digital signal processing module is connected to the digital output port of the transceiver, the digital input port of the transceiver is connected to the output port of the digital signal processing module, the RF output port of the transceiver is connected to the input port of the transmitting link, and the output port of the transmitting link is connected to the transmitting antenna; The first receiving sublink includes a first LNA; an input port of the first LNA is connected to a first output port of the dual-frequency receiving antenna filter, and an output port of the first LNA is connected to a first input port of the combiner; The second receiving sub-link includes a second LNA, a RF switch, and a load; the input port of the second LNA is connected to the second output port of the dual-band receiving antenna filter, the output port of the second LNA is connected to the second enable port of the RF switch, the output port of the load is connected to the first enable port of the RF switch, and the output port of the RF switch is connected to the second input port of the combiner.

7. The transceiver according to claim 6, characterized in that: The working modes of the transceiver are: The first receiving sublink operates in an FDD mode, and the second receiving sublink operates in a TDD mode; When the second receiving sub-link operates in TDD mode, in a receiving time slot, the RF switch switches on the second LNA, and the second LNA is in a working state; in a transmitting time slot, the RF switch switches on the load, and the second LNA is in a closed state.

8. The transceiver according to claim 1, characterized in that: It also includes dual-band filters and circulators; The antenna includes an FDD antenna and a TDD antenna; The dual-mode receiving link comprises: a combiner, a small signal amplifier, a first receiving sub-link and a second receiving sub-link; The TDD antenna is connected to the first input port of the dual-frequency filter, the FDD antenna is connected to the second input port of the dual-frequency filter, the first output port of the dual-frequency filter is connected to the input end of the first receiving sub-link, the second output port of the dual-frequency filter is connected to the second port of the circulator, the third port of the circulator is connected to the input port of the second receiving sub-link, the first port of the circulator is connected to the output port of the transmitting link, the first input port of the combiner is connected to the output port of the first receiving sub-link, the second input port of the combiner is connected to the output port of the second receiving sub-link, the input port of the small signal amplifier is connected to the output port of the combiner, the RF input port of the transceiver is connected to the output port of the small signal amplifier, the input port of the digital signal processing module is connected to the digital output port of the transceiver, the digital input port of the transceiver is connected to the output port of the digital signal processing module, and the RF output port of the transceiver is connected to the input port of the transmitting link; The first receiving sublink includes a first LNA; an input port of the first LNA is connected to a first output port of the dual-frequency filter, and an output port of the first LNA is connected to a first input port of the combiner; The second receiving sublink includes a high-power switch, a second LNA, a first load, a radio frequency switch, and a second load; an input port of the high-power switch is connected to the third port of the circulator, an input port of the second LNA is connected to the second gate port of the high-power switch, an input port of the first load is connected to the first gate port of the high-power switch, an output port of the second LNA is connected to the second gate port of the radio frequency switch, an output port of the second load is connected to the first gate port of the radio frequency switch, and an output port of the radio frequency switch is connected to the second input port of the combiner; The transmission chain includes a driver amplifier and a power amplifier; the input port of the driver amplifier is connected to the RF output port of the transceiver, the output port of the driver amplifier is connected to the input port of the power amplifier, and the output port of the power amplifier is connected to the first port of the circulator.

9. The transceiver according to claim 8, characterized in that: The working modes of the transceiver are: The first receiving sublink operates in an FDD mode, and the second receiving sublink operates in a TDD mode; When the second receiving sub-link operates in TDD mode, in a receiving time slot, the high-power switch enables the second LNA, the RF switch enables the second LNA, the second LNA is in an operating state, and the driving amplifier and the power amplifier are in an off state; in a transmitting time slot, the high-power switch enables the first load, the RF switch enables the second load, the driving amplifier and the power amplifier are in an operating state, and the second LNA is in an off state.

10. The transceiver according to any one of claims 4 to 9, characterized in that: The first sub-receiving link further includes a first filter; an input port of the first filter is connected to an output port of the first LNA, and an output port of the first filter is connected to a first input port of the combiner; The second sub-receiving chain also includes a second filter; an input port of the second filter is connected to an output port of the second LNA, and an output port of the second filter is connected to a second enable port of the RF switch.

Images