CN107257245A - Anti-interference Transmit-Receive Unit, R-T unit and anti-interference attenuation processing method - Google Patents
Anti-interference Transmit-Receive Unit, R-T unit and anti-interference attenuation processing method Download PDFInfo
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- CN107257245A CN107257245A CN201710453007.2A CN201710453007A CN107257245A CN 107257245 A CN107257245 A CN 107257245A CN 201710453007 A CN201710453007 A CN 201710453007A CN 107257245 A CN107257245 A CN 107257245A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/109—Means associated with receiver for limiting or suppressing noise or interference by improving strong signal performance of the receiver when strong unwanted signals are present at the receiver input
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
Abstract
The present invention relates to a kind of anti-interference Transmit-Receive Unit, R-T unit and anti-interference attenuation processing method, the anti-interference Transmit-Receive Unit includes transceiver module, signal processing module, governor circuit and the attenuation control circuit being connected between transceiver module and governor circuit for receiving input signal；Signal processing module is connected between transceiver module and governor circuit；Input signal is carried out signal transacting and exports baseband signal to governor circuit by signal processing module, governor circuit judges whether input signal needs decay, if then exporting corresponding control signal to attenuation control circuit according to the signal strength values of input signal, corresponding Attenuation control voltage is exported according to control signal by attenuation control circuit and controls transceiver module to carry out attenuation processing to input signal.The present invention can not only improve antiblocking ability using the PIN pipes increase adjustable damping function of transceiver module, while can optimize receiving sensitivity and improve the competitiveness of product in the market.
Description
Technical field
The present invention relates to communication technical field, more specifically to a kind of anti-interference Transmit-Receive Unit, R-T unit and anti-
Interference attenuation processing method.
Background technology
For receiver, so-called obstruction refers to after a high reject signal enters and receives input, make reception
Circuit produces non-linear distortion, reduces receptivity., will when there is strong barrage jamming signal in time division duplex receive-transmit system
So that radio-frequency front-end receives link produces serious non-linear distortion, gain decline and noise coefficient and substantially increased, cause reception
Signal to noise ratio declines, and causes the communication quality of system to deteriorate, or even causes communication disruption, has a strong impact on the normal of user and uses.
Influence for reduction obstruction interference to receiver RF front-end circuit, currently existing scheme is in radio-frequency front-end road
Increase agc circuit to realize, agc circuit is made up of adjustable attenuator and wave detector；Because adjustable attenuator and wave detector are present
Insertion loss, so scheme causes the reduction of receiving sensitivity, while increase the cost of product, reduction product in the market competing
Strive power.
In addition, existing can also constitute a path control unit using a switch and an attenuator, two are had
Such path；It is switched on-off is determined by operating frequency range, and the size of attenuation is determined by actual demand；Switching function
Realized using metal-oxide-semiconductor, attenuator function is realized by voltage-controlled variable resistance.This circuit of prior art has the disadvantage：
Circuit realiration is complicated, more using device, and it is big to take pcb board area；The cost of realization is too high, reduces product in the market
Competitiveness.
The content of the invention
The technical problem to be solved in the present invention is, for the drawbacks described above of prior art, there is provided the anti-interference transmitting-receiving of one kind
Unit, R-T unit and anti-interference attenuation processing method.
The technical solution adopted for the present invention to solve the technical problems is：Construct a kind of anti-interference Transmit-Receive Unit, its feature
It is, including receives the transceiver module of input signal, signal processing module, governor circuit and be connected to the transceiver module
With the attenuation control circuit between the governor circuit；The signal processing module is connected to the transceiver module and the master control
Between circuit；
The input signal is carried out signal transacting and exports baseband signal to the governor circuit by the signal processing module,
The governor circuit judges whether the input signal needs decay, if then defeated according to the signal strength values of the input signal
Go out corresponding control signal to the attenuation control circuit, export corresponding according to the control signal by the attenuation control circuit
Attenuation control voltage control the transceiver module to carry out attenuation processing to the input signal.
In anti-interference Transmit-Receive Unit of the present invention, it is preferable that the governor circuit stores preset signal strength value,
If the input signal needs decay, the signal strength values of the input signal are compared with the preset signal strength value
Compared with, and corresponding control signal is exported according to comparative result.
In anti-interference Transmit-Receive Unit of the present invention, it is preferable that the transceiver module is PIN pipe transceiver modules, bag
Include the first diode D1001, the second diode D1002, electric capacity C1001, electric capacity C1003, electric capacity C1076, magnetic bead FB1001, electricity
Hinder R1001, resistance R1002, inductance L1001, electric capacity C1009, electric capacity C1010, electric capacity C1011, resistance R1003 and resistance
R1004；
The inductance L1001, the magnetic bead FB1001, the resistance R1001 are sequentially connected in series in first diode
Between D1001 anode and the first output end of the attenuation control circuit；The electric capacity C1076 is connected to the magnetic bead
Between FB1001 the second end and reference ground；The resistance R1002 is in parallel with the resistance R1001, and the resistance R1002
Second end is also connected to reference ground by the electric capacity C1003；The electric capacity C1009, the electric capacity C1010, the electric capacity
C1011, the resistance R1003 and the resistance R1004 are connected in parallel successively, and the electric capacity C1011 first end also with
The negative electrode connection of the second diode D1002, anode and the attenuation control circuit of the second diode D1002 connect
Connect.
In anti-interference Transmit-Receive Unit of the present invention, it is preferable that the attenuation control circuit is opened including switching control
Close U1001, inductance L1004, magnetic bead FB1002, resistance R1005, resistance R1006, electric capacity C1012 and electric capacity C1013；
The inductance L1004, the magnetic bead FB1002 and the resistance R1006 are sequentially connected in series in the two or two pole
Between pipe D1002 anode and switching control switch U1001 the second output end；The resistance R1005 and the resistance
R1006 is connected in parallel, and the second end of the resistance R1005 is also connected to reference ground by the electric capacity C1013；The electric capacity
C1012 is connected between the second end of the magnetic bead FB1002 and reference ground；The first electricity of the switching control switch U1001
Pressure input pin and second voltage input pin are connected with the governor circuit, the control signal exported according to the governor circuit
Corresponding control voltage is exported by second output end and first output end respectively and controls second diode
D1002 conducting state realizes the decay to input signal.
In anti-interference Transmit-Receive Unit of the present invention, it is preferable that also including the antenna for receiving and transmitting signal, Yi Jilian
It is connected on the wave filter for being filtered processing between the antenna and the transceiver module to the input signal.
In anti-interference Transmit-Receive Unit of the present invention, it is preferable that the signal processing module is filtered including the first band logical
Ripple device, low-noise amplifier, the second bandpass filter, the first frequency mixer, intermediate-frequency circuit, the second frequency mixer, the first local oscillator and
Second local oscillator；
First bandpass filter, the low-noise amplifier, second bandpass filter and the medium frequency electric
Road is sequentially connected in series between the transceiver module and the governor circuit, and first frequency mixer is connected on the second band logical filter
Between ripple device and the intermediate-frequency circuit, second frequency mixer is connected between the intermediate-frequency circuit and the governor circuit；Institute
State the first local oscillator and be connected with first frequency mixer and believed the input with providing the first local oscillation signal to first frequency mixer
Number be converted to intermediate-freuqncy signal；Second local oscillator is connected to provide second to second frequency mixer with second frequency mixer
The intermediate-freuqncy signal is converted to baseband signal and is sent to the governor circuit by the signal that shakes.
The present invention also provides a kind of R-T unit, including anti-interference Transmit-Receive Unit as described above.
The present invention also provides a kind of anti-interference attenuation processing method of Transmit-Receive Unit, including：
Governor circuit detects input signal in real time, judges whether the input signal needs decay；
If so, then corresponding control signal is exported to attenuation control circuit according to the signal strength values of the input signal,
Corresponding Attenuation control voltage control transceiver module is exported by the attenuation control circuit decay is carried out to the input signal
Reason.
In the anti-interference attenuation processing method of Transmit-Receive Unit of the present invention, it is preferable that the governor circuit storage
Preset signal strength value, if the input signal needs decay, the signal strength values of the input signal are preset with described
Signal strength values are compared, and export corresponding control signal according to comparative result.
In the anti-interference attenuation processing method of Transmit-Receive Unit of the present invention, it is preferable that the input signal includes
Control frame, the control frame includes transmission time slot, free timeslot and receives time slot, when the free timeslot is arranged on the transmitting
Between gap and the reception time slot；The reception time slot is used to control the governor circuit log-on data to receive and to the input
The signal strength values of signal are calculated, and the free timeslot is used to start adjustable attenuation.
Implement anti-interference Transmit-Receive Unit, R-T unit and the anti-interference attenuation processing method of the present invention, with following beneficial
Effect：The anti-interference Transmit-Receive Unit of the present invention include receiving the transceiver module of input signal, signal processing module, governor circuit,
And it is connected to the attenuation control circuit between transceiver module institute governor circuit；Signal processing module is connected to transceiver module and master
Between control circuit；Input signal is carried out signal transacting and exports intermediate-freuqncy signal to governor circuit, governor circuit by signal processing module
Judge whether input signal needs decay, if then exporting corresponding control signal to declining according to the signal strength values of input signal
Down control circuit, exports corresponding Attenuation control voltage according to control signal by attenuation control circuit and controls transceiver module to input
Signal attenuation is handled.The present invention can not only improve antiblocking energy using the PIN pipes increase adjustable damping function of transceiver module
Power, while receiving sensitivity can be optimized and the competitiveness of product in the market is improved.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the anti-interference hardware architecture diagram of Transmit-Receive Unit embodiment one of the invention；
Fig. 2 is the anti-interference hardware architecture diagram of Transmit-Receive Unit embodiment two of the invention；
Fig. 3 is the schematic diagram of anti-interference Transmit-Receive Unit transceiver module of the invention and attenuation control circuit；
Fig. 4 is the schematic flow sheet of the anti-interference attenuation processing embodiment of the method one of Transmit-Receive Unit of the present invention；
Fig. 5 is the schematic flow sheet of the anti-interference attenuation processing embodiment of the method two of Transmit-Receive Unit of the present invention；
Fig. 6 is the embodiment control signal frame schematic diagram of anti-interference attenuation processing method one of Transmit-Receive Unit of the present invention.
Embodiment
In order to which technical characteristic, purpose and effect to the present invention are more clearly understood from, now compare accompanying drawing and describe in detail
The embodiment of the present invention.
As shown in figure 1, being the hardware architecture diagram of anti-interference Transmit-Receive Unit embodiment one of the invention, the anti-interference transmitting-receiving
Unit includes：Transceiver module 30, signal processing module 40, governor circuit 50, attenuation control circuit 60.It is to be appreciated that this hair
Bright anti-interference Transmit-Receive Unit can be applied to the handheld terminals such as receiver, time division duplex transceiver or wireless interspeaker.
Specifically：
Transceiver module 30, is connected with signal processing module 40, and decay is needed for receiving input signal, and in input signal
When according to attenuation control circuit 60 transmit Attenuation control voltage to input signal carry out attenuation processing, and then reduce input signal
In barrage jamming signal influence, receives link radio-frequency front-end is avoided non-linear distortion, gain declines, while reducing noise
Influence.Preferably, in the present embodiment, transceiver module 30 is double PIN pipe transceiver modules.
Signal processing module 40, is connected between transceiver module 30 and governor circuit 50, to what is received through transceiver module 30
Input signal is handled, and input signal is ultimately converted into baseband signal to governor circuit 50 uses for late-class circuit.
Governor circuit 50, is connected with signal processing module 40 and attenuation control circuit 60 respectively, for detecting input in real time
Signal, and judge whether input signal needs decay, if input signal needs decremeter to calculate the signal strength values of input signal,
The signal strength values of input signal and the preset signal strength value that prestores are compared, inputted according to comparative result corresponding
Control signal to attenuation control circuit 60.
Attenuation control circuit 60, is connected between governor circuit 50 and transceiver module 30, receives what governor circuit 50 was exported
Control signal exports corresponding Attenuation control voltage to transceiver module 30, is controlled by Attenuation control voltage in transceiver module 30
The conducting state (impedance for controlling PIN pipes) of PIN pipes, makes receives link produce attenuation corresponding with Attenuation control voltage,
So as to reach the purpose that attenuation processing is carried out to input signal.
It is to be appreciated that the present invention realizes adjustable attenuator function by being multiplexed PIN pipes in the transceiver module of receiving terminal,
Improve the ability of the anti-strong signal blocking interference of receiver.I.e. on the basis of existing PIN pipes transceiver, leading for PIN pipes is utilized
Logical characteristic, designs many gear adjustable damping functions, the non-linear distortion of radio-frequency front-end, is improved when the big signal of reduction receiver is disturbed
Receiver antijamming capability.Further, it is of the invention compared with existing RFAGC (radio frequency automatic growth control) scheme, also carry
The high sensitivity received, while eliminating numerical-control attenuator ATT and power detector, greatly reduces cost.
Preferably, in this embodiment, attenuation processing is not carried out to input signal if input signal does not decay.
As shown in Fig. 2 being the hardware architecture diagram of anti-interference Transmit-Receive Unit embodiment two of the invention, in the embodiment
In, anti-interference Transmit-Receive Unit of the invention includes：Antenna 10, low pass filter 20, transceiver module 30, signal processing module 40,
Wherein, signal processing module 40 includes the first bandpass filter 401, low-noise amplifier 402, the second bandpass filter 403, the
One frequency mixer 404, intermediate-frequency circuit 405, the second frequency mixer 406, the first local oscillator 407 and the second local oscillator 408.
Specifically, 20 pairs of low pass filter is connected between antenna 10 and transceiver module 30, and input signal is filtered
Processing, and then suppress the interference signal higher than working frequency.
First bandpass filter 401 and the second bandpass filter 403 are used to suppress the interference outside input signal working frequency range
Signal.
Low-noise amplifier LNA402, for being amplified processing to input signal, and reduces the noise pair of late-class circuit
The influence of receiving sensitivity.
First frequency mixer 404, is connected between low device acoustic amplifier LNA402 and intermediate-frequency circuit 405, while also with first
Local oscillator 407 is connected, and the first local oscillation signal provided by the first local oscillator 407 of reception is by radiofrequency signal (i.e. through low-noise amplifier
The input signal of LNA402 enhanced processings) be converted to intermediate-freuqncy signal.
Intermediate-frequency circuit 405, usually, intermediate-frequency circuit 405 include intermediate-frequency filter and intermediate frequency amplifier, pass through intermediate frequency filtering
Device carries out useful Channel assignment, suppresses the interference signal outside useful signal, then intermediate-freuqncy signal is amplified by intermediate frequency amplifier,
And reduce influence of the noise to receiving sensitivity of late-class circuit.
First local oscillator 407 and the second local oscillator 408 provide first to the first frequency mixer 404 and the second frequency mixer 406 respectively
Shake signal and the second local oscillation signal.
Transceiver module 30, signal processing module 40, governor circuit 50 and attenuation control circuit 60 form a multi gear
The adjustable attenuator in position, realizes different attenuations, wherein receiving by the calculating of signal intensity (RSSI) value to input signal
Hair module 30 designs the radio-frequency front-end in receiver, and it is the transmit-receive switch of multiplexing PIN pipes.Block by force when existing in receives link
During interference signal, receives link radio-frequency front-end will be made to produce serious non-linear distortion, gain decline and noise coefficient and substantially increased
Plus, cause reception demodulation ability to decline, and can by the Transmit-Receive Unit with the adjustable attenuator function of many gears of the present invention
To reduce the influence of the barrage jamming signal in input signal.In PIN pipes transceiver module 30, by the conducting for controlling PIN pipes
State realizes different attenuations；According to the size of the RSSI value of the input signal received, differential declines gear is carried out
Control, the RSSI value of input signal is bigger (i.e. power is bigger), and attenuation is bigger, and then prevents high reject signal from causing radio frequency
There is saturation state in front end link, eliminates obstructing problem caused by radio-frequency front-end saturation.In addition, the present invention is by existing PIN
On the basis of transceiver, using PIN on state characteristic, many gear adjustable damping functions, the strong signal interference of reduction receiver are designed
When radio-frequency front-end non-linear distortion, improve the antijamming capability and dynamic regulation scope of receiver, fade performance flexibly, work
Make that frequency band is wider, system linearity Du Genggao.
With reference to Fig. 2, the operation principle of the present invention is illustrated：When strong signal is disturbed, governor circuit 50 is according to receiving
Input signal calculate the RSSI value of input signal, and it is compared with preset signal strength value, when input signal
RSSI value is -20dB, and governor circuit 50 finds -30 according to -20dB RSSI value in RSSI and the mapping table of attenuation
<This condition of=RSSI, then performs the I/O pin output high level H of the control under the conditions of this, i.e. governor circuit 50, and controls
Digital analog converter DAC output attenuatoin control voltage VCC_1 in governor circuit 50 processed are controlled to attenuation control circuit 60 by decaying
Circuit 60 processed transmits Attenuation control voltage VCC_1 into transceiver module 30, and then controls transmitting-receiving by Attenuation control voltage VCC_1
The conducting state of PIN pipes in module 30, makes receives link produce 30dB decay, eliminates the non-linear distortion of receives link,
Solve the problems, such as the strong signal interference blocking of receiver.Such as RSSI of figure input signal<- 90, then undamped, i.e., attenuation is 0dB,
It is equal to the I/O pin output low level L of governor circuit 50, and controls DAC output attenuatoin control voltages VCC_5 to pass through adjustable attenuation
Circuit 60 is transmitted into transceiver module 30, and the conducting state of PIN pipes is controlled by Attenuation control voltage VCC_5, makes receives link
It is undamped to produce.
| Input signal RSSI/dBm | Receives link attenuation | Attenuation control voltage |
| -30<=RSSI | 30dB | VCC_1 |
| -80<=RSSI<-30 | 18dB | VCC_2 |
| -85<=RSSI<-80 | 12dB | VCC_3 |
| -90<=RSSI<-85 | 6dB | VCC_4 |
| RSSI<-90 | It is undamped | VCC_5 |
Table 1RSSI and attenuation corresponding relation
As shown in table 1, in the present embodiment, Attenuation control voltage is 5.It is to be appreciated that Attenuation control voltage is root
Determined according to the demand of product design；Attenuation control voltage determines by the size of attenuation, and Attenuation control voltage number by
The number of attenuation is determined, and the number of attenuation is determined by actual product demand, therefore the quantity foundation of Attenuation control voltage
Actual conditions are determined, are changed with the actual demand of product design.
As shown in figure 3, being anti-interference Transmit-Receive Unit transceiver module 30 and attenuation control circuit 60 circuit theory diagrams of the invention；
When being multiplexed PIN pipe transmit-receive switches, the control to PIN conducting voltage is completed by VCC and VCC1, with the receipts chain that achieves a butt joint
The different attenuation in road.Wherein, VCC1 controls DAC outputs by DSP Processor by software instruction, and its size is by biasing resistor
R1003, R1004, R1005 and R1006 resistance determine that VCC and VCC1 switching are realized by attenuation control circuit 60.Example
Such as, the RSSI value for receiving input signal is -55dB, the relation of RSSI and attenuation with reference to shown in table 1, by governor circuit 50
Control switching control switch U1001 makes its PIN3 pin be connected with PIN4 pins, and controls DAC's by software instruction by DSP
VCC1=0.75V is exported, controls the second diode D1002 conducting state receives link is produced declining for 18dB by VCC1
Subtract.The control principle of other attenuations is identical with 18dB control principle.
| Control pad value | VCC1 magnitudes of voltage (V) |
| 6dB | 0.56 |
| 12dB | 0.64 |
| 18dB | 0.75 |
The corresponding relation of the attenuation of table 2 and DAC output voltage value
It is to be appreciated that the specific size of attenuation is determined by the actual demand of product, VCC1 magnitude of voltage is by reality
Attenuation and biasing resistor are determined.
Specifically, transceiver module 30 includes the first diode D1001, the second diode D1002, electric capacity C1001, electric capacity
C1003, electric capacity C1076, magnetic bead FB1001, resistance R1001, resistance R1002, inductance L1001, electric capacity C1009, electric capacity C1010,
Electric capacity C1011, resistance R1003, resistance R1004.
Inductance L1001, magnetic bead FB1001, resistance R1001 are sequentially connected in series anode and decay control in the first diode D1001
Between first output end of circuit 60 processed；Electric capacity C1076 is connected to magnetic bead FB1001 the second end and reference ground；Resistance R1002
It is in parallel with resistance R1001, and resistance R1002 the second end is also connected to reference ground by electric capacity C1003；Electric capacity C1009, electric capacity
C1010, electric capacity C1011, resistance R1003 and resistance R1004 are connected in parallel successively, and electric capacity C1011 first end also with
Two diode D1002 negative electrode connection, the second diode D1002 anode is connected with attenuation control circuit 60.Also include electric capacity
C1002, inductance L1009, inductance L1002, electric capacity C1004, electric capacity C1005, electric capacity C1006, inductance L1003, electric capacity C1008；
Electric capacity C1002 and inductance L1009 are sequentially connected in series between the first diode D1001 anode and negative electrode, and inductance L1002 is connected on
Between first diode D1001 negative electrode and reference ground；Electric capacity C1004 is connected on the first diode D1001 negative electrode and antenna
Between 10, electric capacity C1005 and inductance L1003 are sequentially connected in series negative electrode and the second diode D1002 in the first diode D1001
Between anode, electric capacity C1006 is connected between electric capacity C1005 and inductance L1003 node and reference ground；Electric capacity C1008 first
End is connected with the second diode D1002 anode, electric capacity C1008 the second end and the bandpass filter of transceiver module 30 and first
401 connections.
Attenuation control circuit includes switching control switch U1001, inductance L1004, magnetic bead FB1002, resistance R1005, resistance
R1006, electric capacity C1012 and electric capacity C1013.
Inductance L1004, magnetic bead FB1002, resistance R1006 are sequentially connected in series the anode in the second diode D1002 with cutting
Between the PIN4 pins for changing controlling switch U1001；Resistance R1005 is connected in parallel with resistance R1006, and the second of resistance R1005
End is also connected to reference ground by electric capacity C1013；Electric capacity C1012 is connected between magnetic bead FB1002 the second end and reference ground；
Switching control switch U1001 first voltage input pin and second voltage input pin is connected with governor circuit 50, according to master
Control decay of the conducting state realization for the second diode D1002 of Attenuation control voltage control that circuit 50 is exported to input signal.
As shown in figure 3, it is the second electricity that switching control switch U1001 PIN3 pins, which are first voltage input pin, PIN1 pins,
Press input pin；The I/O pins connection of switching control switch U1001 PIN6 pins and governor circuit 50, switching control switch
U1001 PIN5 pins are connected with the 5V power supplys of governor circuit 50, and switching control switchs U1001 PIN3 pins and governor circuit
The output port connection of DAC in 50, switching control switch U1001 PIN1 pins and the power output end in governor circuit 50
Connection.Preferably, the output of this power supply is output as 3.3V or 0V voltages by the I/O controls of governor circuit 50.
It is to be appreciated that in this embodiment, electric capacity C1003 is mainly used in being filtered VCC1 power supplys；Resistance R1001
It is used to the first diode D1001 conducting electric current is adjusted with resistance R1002；Magnetic bead FB1001 is used to enter VCC1 power supplys
Row filtering；On the one hand electric capacity C1076 is filtered to VCC1 power supplys, on the other hand will reveal the hair come by L1001 when launching
Signal shorts are penetrated to ground；Inductance L1001 is to prevent transmission signal to be leaked to VCC1 power supplys；Inductance L1002 is to provide straight to VCC1
Road is flowed back to ground；Electric capacity C1002 and inductance L1009 are the isolations between adjusting Circuit Matching, transmitting and receiving；Electric capacity
C1001, electric capacity C1004 and electric capacity C1008 are coupled capacitors；Electric capacity C1005 is coupled capacitor and by the first diode
D1001 and the second diode D1002 isolated from power come, it is to avoid interfere；Electric capacity C1006, electric capacity C1007 and inductance
L1003 constitutes a quarter λ lines；Resistance R1003, resistance R1004, resistance R1005 and resistance R1006 are regulations the two or two
Pole pipe D1002 conducting electric current；Magnetic bead FB1002 and electric capacity C1013 are filtered to VCC1 or VCC；Electric capacity C1009, electric capacity
During C1010 and electric capacity C1011 reduction transmittings, transmission signal is leaked to the energy of receiving terminal.
According to Fig. 3, as the signal intensity -30dBm of the input signal of reception<During=RSSI, the I/O pins of governor circuit 50
The PIN6 pins that high level H switchs U1001 to switching control are exported, are high level H, CTL=by the Automatic level control of PIN6 pins
" H ", now I/O delivery outlets control output 3.3V voltages, the i.e. logic voltage of governor circuit 50 are 3.3V, switching control switch
U1001 PIN1 pins and PIN4 pins connection, VCC1=3.3V, VCC=VCC_1, switching U1001 by switching control will
VCC1 is transmitted to the second diode D1002, and the second diode D1002 conducting state is controlled (i.e. by Attenuation control voltage VCC1
Control its impedance), receives link is produced 30dB decay.As the signal intensity -80dBm of the input signal of reception<=RSSI
<During -30dBm, the I/O pins of governor circuit 50 export the PIN6 pins that low level L switchs U1001 to switching control, by PIN6
The Automatic level control of pin is low level L, CTL=" L ", now governor circuit 50 I/O delivery outlets control output 0V voltages, that is, is patrolled
It is 0V, switching control switch U1001 PIN3 pins and the connection of PIN4 pins to collect voltage；VCC1=0V, VCC=VCC_2, pass through
Switching control switch U1001 transmits VCC_2 to the second diode D1002, and the two or two pole is controlled by Attenuation control voltage VCC_2
Pipe D1002 conducting state, makes receives link produce 18dB decay.As the signal intensity -85dBm of the input signal of reception<
=RSSI<During -80dBm, CTL=" L ", i.e. logic voltage are 0V, and switching control switchs U1001 PIN3 pins and PIN4 pins
Connection；The second diode D1002 conducting state is controlled by Attenuation control voltage VCC_3, receives link is produced declining for 12dB
Subtract.As the signal intensity -90dBm for receiving input signal<=RSSI<During -85dBm, CTL=" L " is that logic voltage is 0V, switching
Controlling switch U1001 PIN3 pins and PIN4 pins connection；Second diode D1002 is controlled by Attenuation control voltage VCC_4
Conducting state, make receives link produce 6dB decay.As the RSSI for receiving input signal<During -90dBm, CTL=" L " is to patrol
It is 0V, switching control switch U1001 PIN3 pins and the connection of PIN4 pins to collect voltage；Controlled by Attenuation control voltage VCC_5
Second diode D1002 conducting state, makes the undamped generation of receives link.
Logical table is realized in the control of the differential declines amount of table 3
As shown in figure 4, the schematic flow sheet of the anti-interference attenuation processing embodiment of the method one for Transmit-Receive Unit of the present invention；
In the embodiment, the anti-interference attenuation processing method of Transmit-Receive Unit of the present invention comprises the following steps：
S101, governor circuit 50 detect input signal in real time, judge whether input signal needs decay；
S102, if so, then exporting corresponding control signal to attenuation control circuit according to the signal strength values of input signal
60, corresponding Attenuation control voltage is exported by attenuation control circuit 60 and controls transceiver module 30 to carry out decay to input signal
Reason.
When there is strong barrage jamming signal in receives link, receives link radio-frequency front-end will be made to produce seriously non-linear
Distortion, gain decline and noise coefficient substantially increase, and cause reception demodulation ability to decline, and have many gears by the present invention
The Transmit-Receive Unit of adjustable attenuator function can eliminate this strong signal blocking interference.In PIN pipes transceiver module 30, pass through
The conducting state of PIN pipes is controlled to realize different attenuations；According to the size of the RSSI value of the input signal received, carry out
The control of differential declines gear, the RSSI value of input signal is bigger (i.e. power is bigger), and attenuation is bigger, and then believes strong jamming
Radio-frequency front-end link number can not be caused saturation state occur, obstructing problem caused by radio-frequency front-end saturation is eliminated.In addition, of the invention
By on the basis of existing PIN transceivers, using PIN on state characteristic, many gear adjustable damping functions are designed, reduction is received
The non-linear distortion of radio-frequency front-end, improves the antijamming capability and dynamic regulation scope of receiver, declines when the strong signal of machine is disturbed
Subtract performance flexibly, working band is wider, system linearity Du Genggao.
Preferably, in this embodiment, when the input signal received is undamped, input signal is not carried out at decay
Reason.I.e. the control of governor circuit 50 DAC output attenuatoin control voltage VCC_ are transmitted to transceiver module 30 by attenuation control circuit 60
In, the conducting state of PIN pipes is controlled by Attenuation control voltage VCC_5, makes the undamped generation of receives link.
As shown in figure 5, the schematic flow sheet of the anti-interference attenuation processing embodiment of the method two for Transmit-Receive Unit of the present invention；
In the embodiment, the anti-interference attenuation processing method of Transmit-Receive Unit of the invention comprises the following steps：
S201, antenna receive input signal and transmitted to governor circuit 50；
S202, governor circuit 50 calculate the signal strength values of input signal by software after receiving an input signal
RSSI；
S203, the signal strength values RSSI and preset signal strength value of input signal be compared, judge whether needs
Decay；In this step, governor circuit 50 is calculated by software after the RSSI of input signal, according to RSSI and pair of attenuation
It should be related to, judge whether to need decay, if desired decay, then step S204 is performed according to table 1；
S204, the I/O pins of the output control signal of governor circuit 50, i.e. governor circuit 50 export low and high level to the control that decays
Circuit 60 processed, controls digital analog converter DAC to export by DSP Processor by software instruction；
S205, digital analog converter DAC carry out voltage digital-to-analogue conversion output attenuatoin control voltage according to the instruction of DSP Processor
VCC1 is to attenuation control circuit 60；
S206, attenuation control circuit 60 transmit Attenuation control voltage VCC1 to transceiver module 30 according to governor circuit 50；
S207, the conducting state by the PIN pipes in Attenuation control voltage VCC1 control transceiver modules 30, to receives link
Carry out attenuation processing；
If S208, undamped, the control of the governor circuit 50 corresponding voltage of DAC outputs to attenuation control circuit 60, master control
The I/O pins of circuit 50 export low level signal to attenuation control circuit 60, are transmitted the voltage by attenuation control circuit 60
Into transceiver module 30, to control the conducting state of the PIN pipes in transceiver module 30, make the undamped generation of receives link.
Fig. 6 is the embodiment control signal frame schematic diagram of anti-interference attenuation processing method one of Transmit-Receive Unit of the present invention.At this
In embodiment, input signal includes control frame, and each control frame includes (Idle when transmission time slot (TX slot), free time
Slot) and receive time slot (RX slot).Free timeslot is arranged between transmission time slot and reception time slot, in other words, when idle
Gap is located at the previous time slot for receiving time slot.Preferably, in an embodiment of the present invention, receiving time slot is used to control governor circuit 50
Log-on data receives and the signal strength values of input signal is calculated, and free timeslot is used to start adjustable attenuation.Specifically, with reference to
Table 1, governor circuit 50 is the RSSI value that input signal is calculated by software in the reception time slot of former frame, and in next frame
Preparation time slot before receiving time slot just completes the attenuation control process to receives link, i.e., before time slot demodulation is received just
Eliminate radio-frequency front-end non-linear distortion jamming receiver caused by high reject signal in advance.The anti-interference attenuation processing of the present invention
Method has real-time, anticipating property, i.e., can complete the attenuation processing to high reject signal before time slot demodulation is received,
Eliminate obstruction of the high reject signal to receiver.
For example, with reference to table 2 when nth slot receives link is undamped, the RSSI value of the input signal received for-
55dB, the relation of RSSI and attenuation with reference to shown in table 1, then within the time before the (n+1)th time slot, by governor circuit 50
Control switching control switch U1001 makes its PIN3 pin be connected with PIN4 pins, and passes through software instruction control by DSP Processor
DAC output, i.e. VCC1=0.75V, make receives link realize 18dB decay, and the control of other 6dB and 12dB attenuations is former
Reason is identical with the control principle of 18dB attenuations.
The present invention carries out attenuation processing by being multiplexed PIN pipes in the transmit-receive switch of radio-frequency front-end to input signal, preceding
The RSSI value for receiving calculating input signal in time slot of one frame, the preparation time slot before next frame receives time slot just completes docking
The attenuation control process of link is received, i.e., before the radio frequency of high reject signal conducting is just eliminated in advance before receiving time slot demodulation
Terminal type non-linear distortion jamming receiver；Whole processing procedure includes the calculating and power attenuation of signal strength values, substantially increases
Attenuation processing it is ageing.
Present invention also offers a kind of R-T unit, the R-T unit includes the anti-interference Transmit-Receive Unit of above-described embodiment.
Above example only technical concepts and features to illustrate the invention, its object is to allow person skilled in the art
Scholar can understand present disclosure and implement accordingly, can not limit the scope of the invention.It is all to be wanted with right of the present invention
The equivalent changes and modifications that scope is done are sought, the covering scope of the claims in the present invention all should be belonged to.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or converted,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (10)
1. a kind of anti-interference Transmit-Receive Unit, it is characterised in that transceiver module, signal processing module including reception input signal,
Governor circuit and the attenuation control circuit being connected between the transceiver module and the governor circuit；The signal transacting
Module is connected between the transceiver module and the governor circuit；
The input signal is carried out signal transacting and exports baseband signal to the governor circuit by the signal processing module, described
Governor circuit judges whether the input signal needs decay, if then exporting phase according to the signal strength values of the input signal
The control signal answered is declined accordingly to the attenuation control circuit by the attenuation control circuit according to control signal output
Down control voltage controls the transceiver module to carry out attenuation processing to the input signal.
2. anti-interference Transmit-Receive Unit according to claim 1, it is characterised in that the governor circuit storage preset signals are strong
Angle value, if the input signal needs decay, by the signal strength values of the input signal and the preset signal strength value
It is compared, and corresponding control signal is exported according to comparative result.
3. anti-interference Transmit-Receive Unit according to claim 1, it is characterised in that the transceiver module is that PIN pipes receive and dispatch mould
Block, including the first diode D1001, the second diode D1002, electric capacity C1001, electric capacity C1003, electric capacity C1076, magnetic bead
FB1001, resistance R1001, resistance R1002, inductance L1001, electric capacity C1009, electric capacity C1010, electric capacity C1011, resistance R1003
With resistance R1004；
The inductance L1001, the magnetic bead FB1001, the resistance R1001 are sequentially connected in series the first diode D1001's
Between anode and the first output end of the attenuation control circuit；The electric capacity C1076 is connected to the of the magnetic bead FB1001
Between two ends and reference ground；The resistance R1002 is in parallel with the resistance R1001, and the second end of the resistance R1002 also leads to
Cross the electric capacity C1003 and be connected to reference ground；The electric capacity C1009, the electric capacity C1010, the electric capacity C1011, the electricity
Resistance the R1003 and resistance R1004 be connected in parallel successively, and the electric capacity C1011 first end also with the two or two pole
Pipe D1002 negative electrode connection, the anode of the second diode D1002 is connected with the attenuation control circuit.
4. anti-interference Transmit-Receive Unit according to claim 3, it is characterised in that the attenuation control circuit includes switching and controlled
System switch U1001, inductance L1004, magnetic bead FB1002, resistance R1005, resistance R1006, electric capacity C1012 and electric capacity C1013；
The inductance L1004, the magnetic bead FB1002 and the resistance R1006 are sequentially connected in series in second diode
Between D1002 anode and switching control switch U1001 the second output end；The resistance R1005 and the resistance
R1006 is connected in parallel, and the second end of the resistance R1005 is also connected to reference ground by the electric capacity C1013；The electric capacity
C1012 is connected between the second end of the magnetic bead FB1002 and reference ground；The switching control switchs U1001 first voltage
Input pin and second voltage input pin are connected with the governor circuit, the control signal control exported according to the governor circuit
Make decay of the conducting state realization of the second diode D1002 to input signal.
5. anti-interference Transmit-Receive Unit according to claim 1, it is characterised in that also including the antenna for receiving and transmitting signal,
And it is connected to the wave filter for being filtered processing between the antenna and the transceiver module to the input signal.
6. anti-interference Transmit-Receive Unit according to claim 1, it is characterised in that the signal processing module includes first band
Bandpass filter, low-noise amplifier, the second bandpass filter, the first frequency mixer, intermediate-frequency circuit, the second frequency mixer, the first local oscillator
And second local oscillator；
First bandpass filter, the low-noise amplifier, second bandpass filter and the intermediate-frequency circuit according to
Secondary to be connected between the transceiver module and the governor circuit, first frequency mixer is connected on second bandpass filter
Between the intermediate-frequency circuit, second frequency mixer is connected between the intermediate-frequency circuit and the governor circuit；Described
One local oscillator is connected with first frequency mixer is turned the input signal with providing the first local oscillation signal to first frequency mixer
It is changed to intermediate-freuqncy signal；Second local oscillator is connected to provide the second local oscillator letter to second frequency mixer with second frequency mixer
Number the intermediate-freuqncy signal is converted into baseband signal is sent to the governor circuit.
7. a kind of R-T unit, it is characterised in that including the anti-interference Transmit-Receive Unit as described in any one of claim 1 to 6.
8. a kind of anti-interference attenuation processing method of Transmit-Receive Unit, it is characterised in that including：
Governor circuit detects input signal in real time, judges whether the input signal needs decay；
If so, then corresponding control signal is exported to attenuation control circuit according to the signal strength values of the input signal, by institute
State attenuation control circuit and export corresponding Attenuation control voltage control transceiver module to input signal progress attenuation processing.
9. the anti-interference attenuation processing method of Transmit-Receive Unit according to claim 8, it is characterised in that the governor circuit
Store preset signal strength value, if the input signal need decay, by the signal strength values of the input signal with it is described
Preset signal strength value is compared, and exports corresponding control signal according to comparative result.
10. the anti-interference attenuation processing method of Transmit-Receive Unit according to claim 8 or claim 9, it is characterised in that the input
Signal includes control frame, and the control frame includes transmission time slot, free timeslot and receives time slot, and the free timeslot is arranged on institute
State between transmission time slot and the reception time slot；The reception time slot is used to control the governor circuit log-on data to receive and right
The signal strength values of the input signal are calculated, and the free timeslot is used to start adjustable attenuation.
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| CN108964683A (en) * | 2018-06-05 | 2018-12-07 | 海能达通信股份有限公司 | A kind of RF transmit-receive circuit and mobile terminal |
| CN110212973A (en) * | 2019-06-28 | 2019-09-06 | 深圳市中冀联合技术股份有限公司 | A kind of attenuator control panel and GNSS satellite signal repeater system |
| CN112505517A (en) * | 2019-08-26 | 2021-03-16 | 南亚科技股份有限公司 | Semiconductor device and method of operating the same |
| CN114944846A (en) * | 2021-02-10 | 2022-08-26 | 海能达通信股份有限公司 | Radio frequency transceiving device and method and electronic equipment |
| CN116366078A (en) * | 2022-12-28 | 2023-06-30 | 中国移动通信有限公司研究院 | Radio frequency attenuation device, method and radio frequency communication equipment |
| CN116704848A (en) * | 2023-08-04 | 2023-09-05 | 南京航天工业科技有限公司 | Unmanned aerial vehicle airborne target simulation method, device and system for receiving and transmitting simultaneously |
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| CN116704848A (en) * | 2023-08-04 | 2023-09-05 | 南京航天工业科技有限公司 | Unmanned aerial vehicle airborne target simulation method, device and system for receiving and transmitting simultaneously |
| CN116704848B (en) * | 2023-08-04 | 2023-10-03 | 南京航天工业科技有限公司 | Unmanned aerial vehicle airborne target simulation method, device and system for receiving and transmitting simultaneously |
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