CN207869103U - A kind of full duplex communication system - Google Patents
A kind of full duplex communication system Download PDFInfo
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- CN207869103U CN207869103U CN201820301628.9U CN201820301628U CN207869103U CN 207869103 U CN207869103 U CN 207869103U CN 201820301628 U CN201820301628 U CN 201820301628U CN 207869103 U CN207869103 U CN 207869103U
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Abstract
The utility model discloses a kind of full duplex communication systems, including：Processor, analog-digital converter, transmitter, receiver, circulator and duplexer, the input terminal of transmitter and the output end of analog-digital converter connect, the output end of transmitter and the input terminal of receiver are connect with circulator or duplexer, the output end of receiver and the input terminal of analog-digital converter connect, and analog-digital converter is connect with processor；Transmitter includes power splitter, wave detector and sequentially connected first switch, the first numerical-control attenuator, the first amplifier, the first low-pass filter, the second amplifier, the first bandpass filter, the second numerical-control attenuator, power amplifier and dual directional coupler, the input terminal of first switch and the output end of analog-digital converter connect, dual directional coupler is connect with circulator or duplexer, and the input terminal of power splitter is connect with dual directional coupler.The utility model reduces the interference of full duplex communication system, and long transmission distance.
Description
Technical field
The utility model is related to field of communication technology, more particularly to a kind of full duplex communication system.
Background technology
With the development of society, demand of the people to communication is increasingly urgent to, the requirement to communication is also higher and higher, now logical
The development of letter technology is maked rapid progress, and is rapidly permeated to social every field.Currently, full-duplex communication technology is that signal is logical
Commonly used a kind of communication work mode in letter.
The full duplex communication system generally use fdd mode or tdd mode of the prior art, there are two solely for fdd mode tool
Vertical channel can reduce the crosstalk between receiving-transmitting chain, but fdd mode can occupy larger frequency spectrum resource；And tdd mode exists
When uplink and downlink is with frequency, need to realize the separation for receiving and emitting using circulator, but existing circulator is bearing 100W power
When, transceiver insulation can only achieve 20~30dB, the crosstalk be easy to causeing between receiving-transmitting chain, in conclusion in the prior art
The interference of full duplex communication system is larger, and transmission range is shorter.
Invention content
In view of this, the utility model provides a kind of full duplex communication system, which reduce the dry of full duplex communication system
It disturbs, and long transmission distance.
The utility model is solved the above problems by following technological means：
A kind of full duplex communication system of the utility model, including：Processor, analog-digital converter, transmitter, receiver,
Circulator and duplexer, the input terminal of the transmitter are connect with the output end of the analog-digital converter, the transmitter it is defeated
Either duplexer connect the input terminal of the receiver and is connect with circulator or duplexer for outlet and circulator, the reception
The output end of device is connect with the input terminal of the analog-digital converter, and the analog-digital converter is also connected to the processor；It is described
Transmitter includes power splitter, wave detector and sequentially connected first switch, the first numerical-control attenuator, the first amplifier, first low
Bandpass filter, the second amplifier, the first bandpass filter, the second numerical-control attenuator, power amplifier and dual directional coupler, institute
The input terminal for stating first switch is connect with the output end of the analog-digital converter, the dual directional coupler and the circulator or
Person's duplexer connects, and the input terminal of the power splitter is connect with the dual directional coupler, the first output end of the power splitter
It is grounded by the wave detector.
Further, the receiver includes power isolation switches, the second low-pass filter, sequentially connected fixed attenuation
It is device, the first limiter, third low-pass filter and the second bandpass filter and sequentially connected second limiter, first low
Noise amplifier, the second low-noise amplifier, the 4th low-pass filter, third bandpass filter and second switch；The power
The movable contact of disconnecting switch is connect with the circulator, the first stationary contact and the high-power absorbing load of the power isolation switches
Connection, the input terminal of second low-pass filter connect with the duplexer, the input terminal of second limiter with it is described
Second stationary contact of the output end of the second low-pass filter or the power isolation switches connect, the fixed attenuator it is defeated
Enter end to connect with the second output terminal of the power splitter, the output end of second bandpass filter and the second switch it is defeated
Outlet is connect with the input terminal of the analog-digital converter.
Further, the receiver further includes automatic growth control module, one end of the automatic growth control module with
The input terminal of first low-noise amplifier connects, the other end of the automatic growth control module and second low noise
The output end of amplifier connects.
Further, the transmitter further includes standing wave detection module, and one end of the standing wave detection module is fixed with described pair
It is connected to coupler, the other end ground connection of the standing wave detection module.
Further, further include that TDD/FDD switchings switch, the input terminal of second limiter is cut by the TDD/FDD
Switch is changed to connect with the second stationary contact of the output end of second low-pass filter and the power isolation switches.
Further, further include external crystal-controlled oscillation, the external crystal-controlled oscillation is connect with the analog-digital converter.
A kind of full duplex communication system of the utility model has the advantages that：
The utility model provides a kind of full duplex communication system, and processor turns radiofrequency signal to be sent by modulus
Parallel operation is converted to analog radio-frequency signal, and then after the processing such as overdamping, amplification, filtering, user can be manual according to actual demand
Connecting cable selects to emit radiofrequency signal using fdd mode, or emits radiofrequency signal using tdd mode, when needing to use
When fdd mode emits radiofrequency signal, circulator can be connected the cable to, so that circulator passes through the radiofrequency signal received
Antenna is launched；When needing to emit radiofrequency signal using tdd mode, duplexer can be connected the cable to, so that duplexing
Device launches the radiofrequency signal received by antenna；Equally, user can use cable by circulator according to actual demand
Or duplexer is connect with receiver, to realize the reception of radiofrequency signal, to realize according to demand to fdd mode and TDD
Switching between pattern, the advantages of having had both fdd mode and tdd mode, reduce the interference of full duplex communication system, and transmit
Distance is remote.
Description of the drawings
The utility model is further described with reference to the accompanying drawings and examples.
Fig. 1 is a kind of schematic block circuit diagram of full duplex communication system of the utility model；
Fig. 2 is the schematic block circuit diagram of another full duplex communication system of the utility model；
Fig. 3 is the circuit diagram of the automatic growth control module of the utility model.
Specific implementation mode
The utility model is described in detail below with reference to attached drawing, as depicted in figs. 1 and 2：One kind of the present embodiment
Full duplex communication system includes：Processor 1, analog-digital converter 2, transmitter 3, receiver 4, circulator 5 and duplexer 6, it is described
The input terminal of transmitter 3 is connect with the output end of the analog-digital converter 2, the output end of the transmitter 3 and circulator 5 or
Duplexer 6 connects, and the input terminal of the receiver 4 connect with circulator 5 or duplexer 6, the output end of the receiver 4 and
The input terminal of the analog-digital converter 2 connects, and the analog-digital converter 2 is also connect with the processor 1.
The transmitter 3 declines including power splitter 301, wave detector 302 and sequentially connected first switch 303, the first numerical control
Subtract device 304, the first amplifier 305, the first low-pass filter 306, the second amplifier 307, the first bandpass filter 308, second
Numerical-control attenuator 309, power amplifier 310 and dual directional coupler 311, the input terminal of the first switch 303 and the mould
The output end of number converter 2 connects, and the dual directional coupler 311 is connect with the circulator 5 or duplexer 6, the work(
The input terminal of device 301 is divided to be connect with the dual directional coupler 311, the first output end of the power splitter 301 passes through the inspection
Wave device 302 is grounded.
In the present embodiment, processor 1 uses FPGA processor, and concrete model can be ZC706.
In the present embodiment, first switch 303 is single-pole single-throw switch (SPST), concrete model HMC550A, the first numerical-control attenuator
304 and second the model of numerical-control attenuator 309 be HMC629ALP4E, the type of the first amplifier 305 and the second amplifier 307
Number it is HMC311SC70, the model LFCN-5850D+ of the first low-pass filter 306, the model of the first bandpass filter 308
For BFCW-542+, the model TGA2576-2-FL of power amplifier 310, the model MBD-20- of dual directional coupler 311
63HP+, the model AD7466BRMZ of analog-digital converter 2, the model UIYCC2528A of circulator 5, the model of duplexer 6
UIYDX9580B。
As a further improvement of the above technical scheme, the receiver 4 includes power isolation switches 401, the second low pass
Filter 402, sequentially connected fixed attenuator 403, the first limiter 404, third low-pass filter 405 and the filter of the second band logical
Wave device 406 and sequentially connected second limiter 407, the first low-noise amplifier 408, the second low-noise amplifier 409,
4th low-pass filter 410, third bandpass filter 411 and second switch 412；The movable contact of the power isolation switches 401
It is connect with the circulator 5, the first stationary contact of the power isolation switches 401 is connect with high-power absorbing load 413, described
The input terminal of second low-pass filter 402 is connect with the duplexer 6, the input terminal of second limiter 407 and described the
The second stationary contact connection of the output end or the power isolation switches 401 of two low-pass filters 409, the fixed attenuator
403 input terminal is connect with the second output terminal of the power splitter 301, the output end of second bandpass filter 406 and institute
The output end for stating second switch 412 is connect with the input terminal of the analog-digital converter 2.
In the present embodiment, the model UIYDX9580B of power isolation switches 401, the second low-pass filter 402, third are low
The model of bandpass filter 405 and the 4th low-pass filter 410 is LFCN-5850D+, the second bandpass filter 406 and third band
The model of bandpass filter 411 is LFCN-5850D+, and the model of the first limiter 404 and the second limiter 407 is
The model of TGL2205-SM, the first low-noise amplifier 408 and the second low-noise amplifier 409 is QPL9503, second switch
412 be single-pole single-throw switch (SPST), concrete model HMC550A, the model FAT0630S2 of fixed attenuator 403.
As a further improvement of the above technical scheme, the receiver further includes automatic growth control module 413, described
One end of automatic growth control module 413 is connect with the input terminal of first low-noise amplifier 408, the automatic gain control
The other end of molding block 413 is connect with the output end of second low-noise amplifier 409.
In the present embodiment, the circuit diagram of automatic growth control module 413 is as shown in Figure 3.For by changing the first low noise
The compression factor of the power of power and the output of second low-noise amplifier 409 that acoustic amplifier 408 inputs automatically controls gain
Amplitude.
Specifically operation principle is：Radiofrequency signal is after overcoupling detection, AD conversion are at binary data by SPI
(CSI, DATA1, CLK1) three lines are input in CPLD, and CPLD sends parallel instruction to network mark according to the variation of input signal
Number D1, D2, D3, D4, regulate and control the attenuation of numerical-control attenuator, to complete AGC controls.
As a further improvement of the above technical scheme, the transmitter further includes standing wave detection module 312, the standing wave
One end of detection module 312 is connect with the dual directional coupler 311, the other end ground connection of the standing wave detection module 312.
In the present embodiment, the model AD8318 of standing wave detection module 312 can monitor echo signal power, then in real time
Echo signal power and power monitoring mouth are subjected to real time contrast.Standing wave detection module 312 act as monitoring echo-signal it is big
It is small, when echo-signal standing wave is more than 2.5:When 1, transmitter is automatically closed, and plays a protective role.
As a further improvement of the above technical scheme, the full duplex communication system further includes TDD/FDD switching switches,
The output that the input terminal of second limiter 407 passes through TDD/FDD switching switch and second low-pass filter 402
End is connected with the second stationary contact of the power isolation switches 401.
In the present embodiment, TDD/FDD switching switches are single-pole double-throw switch (SPDT), can directly stir single-pole double-throw switch (SPDT) to realize
The switching of circulator 5 and duplexer 6, facilitates user to switch.
As a further improvement of the above technical scheme, the full duplex communication system further includes external crystal-controlled oscillation 7, described outer
Portion's crystal oscillator 7 is connect with the analog-digital converter 2, for providing clock signal for analog-digital converter 2.
The utility model provides a kind of full duplex communication system, and radiofrequency signal to be sent is passed through modulus by processor 1
Converter 2 is converted to analog radio-frequency signal, and then after the processing such as overdamping, amplification, filtering, user can be according to actual demand hand
Dynamic connecting cable emits radiofrequency signal to select using fdd mode transmitting radiofrequency signal, or using tdd mode, when needs are adopted
When emitting radiofrequency signal with fdd mode, circulator 5 can be connected the cable to, so that the radiofrequency signal that circulator 5 will receive
Launched by antenna；When needing to emit radiofrequency signal using tdd mode, duplexer 6 can be connected the cable to, so that
Duplexer 6 launches the radiofrequency signal received by antenna；Equally, user can use cable by ring according to actual demand
Shape device 5 or duplexer 6 are connect with receiver 4, to realize the reception of radiofrequency signal, to realize according to demand to FDD moulds
Switching between formula and tdd mode, the advantages of having had both fdd mode and tdd mode, reduce the dry of full duplex communication system
It disturbs, and long transmission distance.
Finally illustrate, above example is merely intended for describing the technical solutions of the present application, but not for limiting the present application, although ginseng
The utility model is described in detail according to preferred embodiment, it will be understood by those of ordinary skill in the art that, it can be to this
The technical solution of utility model is modified or replaced equivalently, without departing from the objective and model of technical solutions of the utility model
It encloses, should all cover in the right of the utility model.
Claims (6)
1. a kind of full duplex communication system, it is characterised in that：Including：Processor, analog-digital converter, transmitter, receiver, annular
Device and duplexer, the input terminal of the transmitter are connect with the output end of the analog-digital converter, the output end of the transmitter
Either duplexer connect the input terminal of the receiver and is connect with circulator or duplexer with circulator, the receiver
Output end is connect with the input terminal of the analog-digital converter, and the analog-digital converter is also connected to the processor；
The transmitter includes power splitter, wave detector and sequentially connected first switch, the first numerical-control attenuator, the first amplification
Device, the first low-pass filter, the second amplifier, the first bandpass filter, the second numerical-control attenuator, power amplifier and amphiorentation
Coupler, the input terminal of the first switch are connect with the output end of the analog-digital converter, the dual directional coupler and institute
It states circulator or duplexer connection, the input terminal of the power splitter is connect with the dual directional coupler, the power splitter
First output end is grounded by the wave detector.
2. a kind of full duplex communication system according to claim 1, it is characterised in that：The receiver includes power isolation
Switch, the second low-pass filter, sequentially connected fixed attenuator, the first limiter, third low-pass filter and the second band logical
Filter and sequentially connected second limiter, the first low-noise amplifier, the second low-noise amplifier, the 4th low pass filtered
Wave device, third bandpass filter and second switch；
The movable contact of the power isolation switches is connect with the circulator, the first stationary contact of the power isolation switches with it is big
Power absorption load connection, the input terminal of second low-pass filter are connect with the duplexer, second limiter
Input terminal is connect with the second stationary contact of the output end of second low-pass filter or the power isolation switches, described solid
The input terminal for determining attenuator is connect with the second output terminal of the power splitter, the output end of second bandpass filter and described
The output end of second switch is connect with the input terminal of the analog-digital converter.
3. a kind of full duplex communication system according to claim 2, it is characterised in that：The receiver further includes increasing automatically
Beneficial control module, one end of the automatic growth control module is connect with the input terminal of first low-noise amplifier, described
The other end of automatic growth control module is connect with the output end of second low-noise amplifier.
4. a kind of full duplex communication system according to claim 1, it is characterised in that：The transmitter further includes standing wave inspection
Module is surveyed, one end of the standing wave detection module is connect with the dual directional coupler, the other end of the standing wave detection module
Ground connection.
5. a kind of full duplex communication system according to claim 2, it is characterised in that：Further include TDD/FDD switching switches,
Output end and institute of the input terminal of second limiter by TDD/FDD switching switches with second low-pass filter
State the second stationary contact connection of power isolation switches.
6. a kind of full duplex communication system according to claim 1, it is characterised in that：Further include external crystal-controlled oscillation, it is described outer
Portion's crystal oscillator is connect with the analog-digital converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820301628.9U CN207869103U (en) | 2018-03-05 | 2018-03-05 | A kind of full duplex communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820301628.9U CN207869103U (en) | 2018-03-05 | 2018-03-05 | A kind of full duplex communication system |
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| Publication Number | Publication Date |
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| CN207869103U true CN207869103U (en) | 2018-09-14 |
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ID=63456139
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820301628.9U Active CN207869103U (en) | 2018-03-05 | 2018-03-05 | A kind of full duplex communication system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109873657A (en) * | 2019-03-14 | 2019-06-11 | 普联技术有限公司 | Two hair two of one kind receives duplex communication RF front-end circuit |
| CN110139309A (en) * | 2019-04-29 | 2019-08-16 | 武汉虹信通信技术有限责任公司 | A kind of power detection regulating system, power detecting method and power regulating method |
| WO2020181669A1 (en) * | 2019-03-12 | 2020-09-17 | 深圳市威富通讯技术有限公司 | High-gain radio frequency front-end device |
| WO2020181668A1 (en) * | 2019-03-12 | 2020-09-17 | 深圳市威富通讯技术有限公司 | Three-dimensional layout high gain radio frequency front end device |
| GB2585433A (en) * | 2019-06-04 | 2021-01-13 | Shenzhen Wave Telecommunication Tech Co Ltd | High-gain radio frequency front end-device |
| CN112600585A (en) * | 2021-03-03 | 2021-04-02 | 理工全盛(北京)科技有限公司 | TR (transmitter-receiver) assembly, signal processing method and related equipment |
| GB2589391A (en) * | 2019-03-12 | 2021-06-02 | Shenzhen Wave Telecommunication Tech Co Ltd | Three-dimensional layout high gain Radio Frequency front end device |
| CN114978221A (en) * | 2021-02-26 | 2022-08-30 | 华为技术有限公司 | Full duplex communication system, method and device for sub-band |
-
2018
- 2018-03-05 CN CN201820301628.9U patent/CN207869103U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020181669A1 (en) * | 2019-03-12 | 2020-09-17 | 深圳市威富通讯技术有限公司 | High-gain radio frequency front-end device |
| WO2020181668A1 (en) * | 2019-03-12 | 2020-09-17 | 深圳市威富通讯技术有限公司 | Three-dimensional layout high gain radio frequency front end device |
| GB2589391A (en) * | 2019-03-12 | 2021-06-02 | Shenzhen Wave Telecommunication Tech Co Ltd | Three-dimensional layout high gain Radio Frequency front end device |
| CN109873657A (en) * | 2019-03-14 | 2019-06-11 | 普联技术有限公司 | Two hair two of one kind receives duplex communication RF front-end circuit |
| CN110139309A (en) * | 2019-04-29 | 2019-08-16 | 武汉虹信通信技术有限责任公司 | A kind of power detection regulating system, power detecting method and power regulating method |
| CN110139309B (en) * | 2019-04-29 | 2022-07-19 | 武汉虹信科技发展有限责任公司 | Power detection and regulation system, power detection method and power regulation method |
| GB2585433A (en) * | 2019-06-04 | 2021-01-13 | Shenzhen Wave Telecommunication Tech Co Ltd | High-gain radio frequency front end-device |
| CN114978221A (en) * | 2021-02-26 | 2022-08-30 | 华为技术有限公司 | Full duplex communication system, method and device for sub-band |
| CN114978221B (en) * | 2021-02-26 | 2023-07-14 | 华为技术有限公司 | Sub-band full duplex communication system, method and device |
| CN112600585A (en) * | 2021-03-03 | 2021-04-02 | 理工全盛(北京)科技有限公司 | TR (transmitter-receiver) assembly, signal processing method and related equipment |
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