CN107453783A - A kind of adaptive co-located Interference Suppression System and method that can reduce notch bandwidth - Google Patents
A kind of adaptive co-located Interference Suppression System and method that can reduce notch bandwidth Download PDFInfo
- Publication number
- CN107453783A CN107453783A CN201710810437.5A CN201710810437A CN107453783A CN 107453783 A CN107453783 A CN 107453783A CN 201710810437 A CN201710810437 A CN 201710810437A CN 107453783 A CN107453783 A CN 107453783A
- Authority
- CN
- China
- Prior art keywords
- mrow
- msub
- signal
- correlator
- detection unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
- H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
- H04B1/525—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
Abstract
The invention discloses a kind of adaptive co-located Interference Suppression System and method that can reduce notch bandwidth, the co-located Interference Suppression System includes coupler one, orthogonal power splitter one, orthogonal power splitter two, adjustable attenuator one, adjustable attenuator two, correlator one, correlator two, detection unit one, detection unit two, controller, synthesizer, coupler two.Pass through detection unit and controller, adjustable attenuator controlled quentity controlled variable is calculated, adjudicated and locked, the Self Adaptive Control for the side of releasing, the constant of adjustable attenuator controlled quentity controlled variable is realized, so as to avoid decay of the co-located Interference Suppression System to useful signal, realizes the reduction of notch bandwidth.The system is when offsetting reception interference signal, it is ensured that receives weak useful signal and is not attenuated, ensure that the normal work of receiver, due to having the function that to reduce bandwidth, it is also possible to reduce transmitting-receiving frequency difference, improve the utilization rate of frequency spectrum resource.
Description
Technical field
The present invention relates to communication system technical field of electromagnetic compatibility, is particularly suitable for use in and concentrates the co-located AF panel of communication station
A kind of system, and in particular to adaptive co-located Interference Suppression System and method that can reduce notch bandwidth.
Background technology
Concentrate communication station that substantial amounts of communication equipment is often installed, it is mutual closer to the distance because space is limited, cause
Isolation between transceiver communication system is limited, it is difficult to meets EMC Requirements.When particularly high-power emission system works,
The electromagnetic wave of radiation is easily blocked by neighbouring reception antenna coupling, even the receiver desensitization for causing to work, front end simultaneously, nothing
Method normally receives useful signal.
After adaptive co-located Interference Suppression System, the electromagnetism concentrated between communication station communication system can be greatly improved
Compatibility, it can effectively avoid the self-interference problem of local communication receive-transmit system.But traditional adaptive co-located Interference Suppression System
Due to the intrinsic imperfection of analog device, when offsetting interference signal, the frequency that can be received to reception system is adjacent to useful letter
Number certain negative function is also produced, it is attenuated so as to cause useful signal to be received to take a step forward, easily make reception system
It is difficult to normally receive useful signal, causes communication failure.
The content of the invention
The purpose of the present invention is：Certain notch bandwidth be present for current adaptive co-located Interference Suppression System, so as to
When causing to offset interference signal, also produced used in counteracting to receiving useful signal, then reception system may be caused to be difficult to normally
The problem of receiving useful signal, propose a kind of adaptive co-located Interference Suppression System that can reduce notch bandwidth.The system to
During the reception interference signal that disappears, it is ensured that receive weak useful signal and be not attenuated, ensure that the normal work of receiver, by
In have the function that reduce bandwidth, it is also possible to reduce transmitting-receiving frequency difference, improve the utilization rate of frequency spectrum resource.
In order to achieve the above object, the technical solution adopted in the present invention is：It is a kind of to reduce the adaptive of notch bandwidth
Co-located Interference Suppression System, it is characterised in that the co-located Interference Suppression System includes coupler one, orthogonal power splitter one, just
Hand over power splitter two, adjustable attenuator one, adjustable attenuator two, correlator one, correlator two, detection unit one, detection unit two,
Controller, synthesizer, coupler two, wherein：
Coupler one, the interference from emission system extraction transmission signal as co-located Interference Suppression System are extracted signal, sent
To orthogonal power splitter one；And extract carrier signal and deliver to orthogonal power splitter two；
Orthogonal power splitter one, interference extraction signal is orthogonalized processing, exports two-way orthogonal reference signal, and respectively
Deliver to adjustable attenuator one and correlator one, adjustable attenuator two and correlator two；
Orthogonal power splitter two, carrier signal is orthogonalized processing, exports two-way quadrature carrier signals, and deliver to respectively
Detection unit one and detection unit two；
Adjustable attenuator one and adjustable attenuator two, the reference signal amplitude exported for adjusting orthogonal power splitter one, and
Reference signal after adjustment is sent into synthesizer；
Synthesizer, for the reference signal after adjustable attenuator one, two carries out range-adjusting to be combined to, produce one
Individual interference reconstruction signal, and it is sent into coupler two；
Coupler two, the interference reconstruction signal that synthesizer is sent out is coupled to reception system, offseted with receiving interference signal
Disappear, and residual signal will be offset and be sent into correlator one, correlator two and detection unit one, detection unit two；
Correlator one and correlator two, what reference signal and coupler two for orthogonal power splitter one to be exported exported supports
The residual signal that disappears carries out coherent detection, and testing result is sent into controller；
Detection unit one and detection unit two, carrier signal and coupler two for being exported to orthogonal power splitter two export
Counteracting residual signal carry out coherent detection, and testing result is sent into controller；
Controller, according to the carrier signal size of extraction, calculation process is carried out with the output result of detection unit one, two,
Calculate and offset remaining carrier signal size, and compared with setting value and adjudicate, correlator is sent into according to court verdict and controlled
The result control that is locked and discharged, so as to realize the constant control to adjustable attenuator.
Further, the detection unit is made up of analog multiplier and low pass filter.
Further, the analog multiplier input is connected with the output of orthogonal power splitter two, output and low pass filter phase
Connection, analog multiplier realizes carrier signal and offsets the product calculation of residual signal, and operation result includes DC quantity and of ac,
Of ac is filtered out by low pass filter, and DC quantity retains, and analog multiplier uses AD834, AD835 chip.
Further, the low pass filter input is connected with analog multiplier output, and output is connected with controller, low pass
Wave filter is used for the of ac for filtering out analog multiplier output, retains its DC quantity, and the DC quantity is sent into controller, low pass
The gain of wave filter is 1, and low pass filter uses OP77 chips.
Further, the detection of carrier signal size is completed by AD8362 family chips in the controller, and DSP is selected
C5000 or C6000 series of high speed DSP.
Further, the adjustable attenuator uses bipolarity electrically controlled attenuator or controllable step attenuator.
Further, the correlator is made up of analog multiplier, integrator, analog multiplier using MC1954L or
AD835 chips, integrator use OP77 chips.
The present invention also provides a kind of adaptive co-located disturbance restraining method that can reduce notch bandwidth, using as described above
Co-located Interference Suppression System, it is characterised in that methods described comprises the following steps：
The first step, fraction transmission signal and carrier signal are extracted by coupler one, are respectively fed to the orthogonal He of power splitter one
Orthogonal power splitter two, and the carrier signal of extraction is delivered into orthogonal power splitter two and controller；
Second step, the transmission signal that orthogonal a pair of couplers of power splitter one extract do orthogonalization process, and output two-way is orthogonal
Reference signal, it is respectively fed to adjustable attenuator one, correlator one and adjustable attenuator two, correlator two；
3rd step, the carrier signal that orthogonal power splitter two extracts to coupler one do orthogonalization process, and output two-way is orthogonal
Carrier extract signal, it is respectively fed to detection unit one and detection unit two；
4th step, adjustable attenuator one and adjustable attenuator two carry out range-adjusting to the two-way reference signal of input, and
Sum operation is done by synthesizer, output is re-fed into coupler two；
5th step, the composite signal that synthesizer is sent into by coupler two are coupled to reception system, enter with receiving interference signal
Row is offset, and is extracted residual signal is offset to correlator one, detection unit one and correlator two, detection unit two；
6th step, correlator one and correlator two from coupler two to offsetting residual signal and orthogonal power splitter one
Two-way reference signal carries out related operation, and operation result is sent into controller；
7th step, detection unit one and detection unit two are to the counteracting residual signal from coupler two and orthogonal power splitter
Two two-way quadrature carrier extraction signal carries out related operation, and operation result is sent into controller；
8th step, controller to from coupler one carrier extract signal carry out power detection, and with detection unit one
The testing result that controller is sent into detection unit two is done carrier cancellation residual signal and calculated, and by result of calculation and preset value ratio
Compared with the control that the testing result for coming autocorrelator one and correlator two is locked and discharged by comparative result；
9th step, the output of controller are used for the attenuation for controlling adjustable attenuator, realized to its input reference signal
Range-adjusting, interference signal is received for offsetting.
Further, in the 8th step, the control for being locked and being discharged to testing result is specifically：When what detection calculated supports
The remaining carrier signal that disappears is less than preset value, then locks correlation, and control adjustable attenuator by the correlation；Calculated when detection
Offset remaining carrier signal and be more than preset value, then discharge correlation, phase is adaptively adjusted by adaptive co-located Interference Suppression System
Pass is worth, and is less than preset value until detecting the counteracting residue carrier signal calculated, locks correlation again.
Further, the specific implementation principle of methods described can be expressed as follows：
Assuming that the reference signal that orthogonal power splitter one exports is：
The multicarrier orthogonal that respective orthogonal power splitter two exports extracts signal：
Interference Cancellation residual signal is：
Wherein, ziIt is the amplitude of frequency component contained by reference signal, ωiFor the angular frequency of frequency component contained by reference signal,
zjIt is wherein carrier extract signal amplitude, ωjFor carrier signal angular frequency, IiIt is the width for offsetting residual interference signal frequency component
Value, DlIt is the amplitude for offsetting remaining useful signal frequency component, ωlFor the angular frequency of frequency component contained by useful signal；
It can be obtained by detection unit one and detection unit two：
Can be calculated the remaining carrier wave of detection counteracting by controller is：
Compared by the detected value and setting value and the locking to correlator output value, so as to realize to adjustable constant control
System, then ensure that useful signal is not attenuated.
Compared with prior art, the beneficial effects of the invention are as follows：Coupler one is used to extract from emission system in the present invention
A small amount of interference reference signal of the transmission signal as co-located Interference Suppression System, and extract carrier signal；Orthogonal power splitter one is real
The orthogonalization process of reference signal is now disturbed, produces two orthogonal reference signals；Orthogonal power splitter two realizes carrier extract signal
Orthogonalization process, produce two quadrature carrier signals；Adjustable attenuator realizes the range-adjusting of reference signal；Synthesizer is used for
Reference signal after adjustment amplitude is synthesized into interference-cancelled signals；Coupler two is used for synthesized output signal with receiving interference letter
Number offset, and residual signal will be offset and be sent into correlator and detection unit；Detection unit is for by counteracting residual signal and just
Carrier signal is handed over to carry out related operation and detection；Controller be used for carrier signal size detection and and detection unit be sent into
Data carry out computing, to obtain the size for offsetting remaining carrier signal, and by it compared with setting value, adjudicate, tied according to judgement
The control that the correlation that fruit is sent into correlator is locked and discharged, and by control result be used for adjustable attenuator control.
Above scheme can reduce the notch bandwidth of co-located Interference Suppression System, avoid the decay of useful signal.
Present system can be used to solve to concentrate communication station adaptively the work of co-located Interference Suppression System when cause it is useful
The problem of signal attenuation, and can further reduce transmitting-receiving frequency difference, improve frequency spectrum resource utilization rate.
Brief description of the drawings
Fig. 1 is the example principles schematic diagram of the present invention.
Fig. 2 is the example schematic of the present invention.
Fig. 3 is detection unit structural representation in the present invention.
Embodiment
For the ease of those of ordinary skill in the art understand and implement the present invention, the present invention is made with reference to embodiment into
The detailed description of one step, it will be appreciated that implementation example described herein is merely to illustrate and explain the present invention, and is not used to limit
The fixed present invention.
As shown in figure 1, concentrating communications platform to have the neighbouring transceiver communication system of two frequencies, reception system receives distant place hair
The useful signal of system transmitting is penetrated, the high-power signal of local emission system transmitting can be led by Space Coupling to reception system
Cause reception system disturbed and useful signal can not be normally received.Adaptive co-located Interference Suppression System can take from emission system
Sample interference signal, and by adaptive feedback control, reconstructed reception interference signal, and in receiving terminal by Interference Cancellation.But tradition
Adaptive co-located Interference Suppression System certain notch bandwidth be present, when the frequency of useful signal is included, will cause useful
The decay of signal, add reception system and detect the difficulty for receiving useful signal.Increase carrier wave on the co-located Interference Suppression System of tradition
Detection and processing department, can detect to offset remaining carrier signal size, and and setting value in real time during Interference Cancellation
Compare and adjudicate, and the adjustable attenuator controlled quentity controlled variable of correlator output is locked, so as to realize the constant of adjustable attenuator
Control, then reduces the notch bandwidth of co-located Interference Suppression System, ensure that useful signal is not cancelled and decayed.
As shown in Figures 2 and 3, the adaptive co-located Interference Suppression System of notch bandwidth is reduced, including it is coupler 1, orthogonal
Power splitter, detection unit, correlator, controller, adjustable attenuator, synthesizer, coupler 2.
Coupler 1 is connected with emission system, and output end is connected with orthogonal power splitter.Coupler 1 is few from emission system extraction
Transmission signal is measured, signal is extracted in the interference as co-located interference cancellation systems, produces to receive for co-located Interference Suppression System and does
The reconstruction signal of signal is disturbed, and is realized with receiving offseting for interference signal；Coupler 1 also extracts carrier signal, and is sent into just
Power splitter 2 and controller are handed over, for adjudicating the calculation process of data.
The orthogonal input of power splitter 1 is connected with coupler 1, is orthogonalized processing to interference extraction signal, and export two-way
Orthogonal reference signal, it is connected respectively with adjustable attenuator 1 and correlator 1, adjustable attenuator 2 and correlator 2 and controller.
The orthogonal input of power splitter 2 is connected with coupler 1, is orthogonalized processing to carrier extract signal, and export two-way
Quadrature carrier signals, it is connected respectively with detection unit 1 and detection unit 2.
The input of adjustable attenuator 1 and adjustable attenuator 2 is connected with the output of orthogonal power splitter 1, and output is connected with synthesizer.
Adjustable attenuator realizes the range-adjusting of input reference signal, then realizes that the width of synthesizer output signal mutually adjusts, adjustment amount
By controller output control.Adjustable attenuator can use step attenuator or bipolarity electrically controlled attenuator.
Two inputs of correlator 1 and correlator 2 are connected with the output of orthogonal power splitter 1 and the output of coupler 2 respectively, and its is defeated
Go out and be connected with controller.Correlator realizes the correlation values detection of orthogonal reference signal and Interference Cancellation residual signal, and will detection
As a result controller is sent into, and locking and release control are implemented by the computing court verdict of controller, control result is used to control
The attenuation of adjustable attenuator.Correlator can be made up of analog multiplier and integrator.
Two inputs of analog multiplier are connected with the output of orthogonal power splitter 1 and the output of coupler 2 respectively, output with
The input of integrator is connected.Analog multiplier realizes reference signal with offsetting the multiplying of residual signal.Operation result contains
Of ac and DC quantity, of ac are filtered out by integrator, and DC quantity retains.Analog multiplier can use MC1954L, AD835 etc.
Chip.
Integrator inputs to be connected with analog multiplier output, and output is connected with controller.Integrator multiplies for filtering out simulation
The of ac of musical instruments used in a Buddhist or Taoist mass output, retain its DC quantity, and the DC quantity is sent into controller.Integrator can use the chip structures such as OP77
Into.
Detection unit inputs to be connected with the output of orthogonal power splitter 2, and output is connected with controller.Detection unit is used for orthogonal load
Ripple signal and the coherent detection for offsetting residual signal, and detected value is sent into controller, computing and judgement are done by controller.Detection
Unit is made up of analog multiplier and low pass filter.
Analog multiplier inputs to be connected with the output of orthogonal power splitter 2, and output is connected with low pass filter.Analog multiplier is real
Existing carrier extract signal and the product calculation for offsetting residual signal, operation result include DC quantity and of ac, and of ac is by low
Bandpass filter filters out, and DC quantity retains.Analog multiplier can use the chips such as AD834, AD835.
Low pass filter inputs to be connected with analog multiplier output, and output is connected with controller.Low pass filter is used to filter
Except the of ac of analog multiplier output, retain its DC quantity, and the DC quantity is sent into controller, the gain of low pass filter
For 1.Low pass filter can use the chips such as OP77 to form.
Controller inputs to be connected with coupler 1, correlator, detection unit output, and output is connected with adjustable attenuator.Control
Device detects in real time to carrier extract signal, carries out calculation process with detection unit input results, obtains and offset remaining carrier signal
The live signal of size, and compared with setting value, adjudicate.If offsetting remaining carrier signal is less than setting value, correlator is locked
The correlation of input, adjustable attenuator is controlled by the value, realizes constant control；If offsetting remaining carrier signal is more than setting value,
Lock value is then discharged, has correlator input correlation directly to control adjustable attenuator, until the counteracting residue carrier wave letter detected
Number it is less than setting value, the correlation of locking correlator input, and adjustable attenuator constant is controlled by the value.Load in controller
Ripple detecting signal unit can be made up of AD8362 family chips, C5000 or C6000 series of high speed DSP can be selected in DSP.
Synthesizer inputs to be connected with adjustable attenuator 1 and the output of adjustable attenuator 2, and output is connected with coupler 2.Synthesizer
The synthesis of adjustable attenuator output signal is realized, composite signal is anti-phase with receiving interference signal constant amplitude, and interference letter is received to offset
Number.
The input of coupler 2 is connected with synthesizer, and output is connected with correlator, detection unit and reception system.Coupler 2 is real
Existing composite signal offsets with receiving interference signal, and will offset residual signal and be sent into correlator and detection unit, carries out related
Detection process.
Using the implementation method of adaptive co-located Interference Suppression System of the invention, this method implementation process includes：
The first step, fraction transmission signal and carrier signal are extracted by coupler 1, are respectively fed to orthogonal power splitter 1 and just
Power splitter 2 is handed over, and the carrier signal of extraction is delivered into orthogonal power splitter 2 and controller.
Second step, the transmission signal that orthogonal power splitter 1 extracts to coupler 1 do orthogonalization process, export the orthogonal ginseng of two-way
Signal is examined, is respectively fed to adjustable attenuator 1, correlator 1 and adjustable attenuator 2, correlator 2.
3rd step, the carrier signal that orthogonal power splitter 2 extracts to coupler 1 do orthogonalization process, export the orthogonal load of two-way
Ripple extracts signal, is respectively fed to detection unit 1 and detection unit 2.
4th step, adjustable attenuator 1 and adjustable attenuator 2 carry out range-adjusting to the two-way reference signal of input, and by
Synthesizer does sum operation, and output is re-fed into coupler 2.
5th step, the composite signal that synthesizer is sent into by coupler 2 are coupled to reception system, are carried out with receiving interference signal
Offset, and extracted residual signal is offset to correlator 1, detection unit 1 and correlator 2, detection unit 2.
6th step, correlator 1 and correlator 2 are to the two-way for offsetting residual signal and orthogonal power splitter 1 from coupler 2
Reference signal carries out related operation, and operation result is sent into controller.
7th step, detection unit 1 and detection unit 2 from coupler 2 to offsetting residual signal and orthogonal power splitter 2
Two-way quadrature carrier extraction signal carries out related operation, and operation result is sent into controller.
8th step, controller to from coupler 1 carrier extract signal carry out power detection, and with detection unit 1 and
The testing result that detection unit 2 is sent into controller does the calculating of carrier cancellation residual signal, and by result of calculation compared with preset value,
The control that the testing result for coming autocorrelator 1 and correlator 2 is locked and discharged by comparative result.Calculated when detection
Offset remaining carrier signal and be less than preset value, then lock correlation, and adjustable attenuator is controlled by the correlation；When detection calculates
Counteracting residue carrier signal be more than preset value, then discharge correlation, adaptively adjusted by adaptive co-located Interference Suppression System
Correlation, it is less than preset value until detecting the counteracting residue carrier signal calculated, locks correlation again.
9th step, the output of controller are used for the attenuation for controlling adjustable attenuator, realized to its input reference signal
Range-adjusting, interference signal is received for offsetting.
By above step, system forms an adaptive co-located Interference Suppression System that can reduce notch bandwidth.By can
Controlled attenuator realizes the range-adjusting of interference extraction reference signal, so as to realize that the width of composite signal mutually adjusts, finally gives one
The individual interference reconstruction signal anti-phase with receiving interference signal constant amplitude, and the suppression for offseting realization with receiving interference signal and disturbing.
By detection unit and controller, adjustable attenuator controlled quentity controlled variable is calculated, adjudicated and locked, the Self Adaptive Control for the side of releasing,
The constant of adjustable attenuator controlled quentity controlled variable is realized, so as to avoid decay of the co-located Interference Suppression System to useful signal, is realized
The reduction of notch bandwidth.
Its general principles are as follows：
Assuming that the reference signal that orthogonal power splitter 1 exports is
The multicarrier orthogonal that respective orthogonal power splitter 2 exports extracts signal
Interference Cancellation residual signal is
Wherein, ziIt is the amplitude of frequency component contained by reference signal, ωiFor the angular frequency of frequency component contained by reference signal,
zjIt is wherein carrier extract signal amplitude, ωjFor carrier signal angular frequency, IiIt is the width for offsetting residual interference signal frequency component
Value, DlIt is the amplitude for offsetting remaining useful signal frequency component, ωlFor the angular frequency of frequency component contained by useful signal.
It can be obtained by detection unit 1 and detection unit 2
Can be calculated the remaining carrier wave of detection counteracting by controller is
Compared by the detected value and setting value and the locking to correlator output value, so as to realize to adjustable constant control
System, then ensure that useful signal is not attenuated.
The present invention increases carrier wave detection process unit and controller part on the co-located Interference Suppression System of tradition, there is carrier wave
Detection unit obtains carrier wave and offsets the correlation value information of residual signal, and calculates by digitial controller that to offset remaining carrier wave big
It is small, constant control is realized to adjustable attenuator as the foundation for comparing, adjudicating, and according to court verdict, so as to reduce system
Notch bandwidth, avoid useful signal and be cancelled, ensure that reception system normally receives processing to weak useful signal.This
The application of invention further genralrlization can also reduce the transmitting-receiving frequency difference concentrated between communication station communication system, improve frequency spectrum resource and utilize
Rate.
It should be appreciated that the part that this specification does not elaborate belongs to prior art.
It should be appreciated that the above-mentioned description for preferred embodiment is more detailed, therefore can not be considered to this
The limitation of invention patent protection scope, one of ordinary skill in the art are not departing from power of the present invention under the enlightenment of the present invention
Profit is required under protected ambit, can also be made replacement or deformation, be each fallen within protection scope of the present invention, this hair
It is bright scope is claimed to be determined by the appended claims.
Claims (10)
- A kind of 1. adaptive co-located Interference Suppression System that can reduce notch bandwidth, it is characterised in that the co-located AF panel System includes coupler one, orthogonal power splitter one, orthogonal power splitter two, adjustable attenuator one, adjustable attenuator two, correlator First, correlator two, detection unit one, detection unit two, controller, synthesizer, coupler two, wherein：Coupler one, the interference from emission system extraction transmission signal as co-located Interference Suppression System are extracted signal, delivered to just Hand over power splitter one；And extract carrier signal and deliver to orthogonal power splitter two；Orthogonal power splitter one, interference extraction signal is orthogonalized processing, exports two-way orthogonal reference signal, and deliver to respectively Adjustable attenuator one and correlator one, adjustable attenuator two and correlator two；Orthogonal power splitter two, carrier signal is orthogonalized processing, exports two-way quadrature carrier signals, and deliver to detection respectively Unit one and detection unit two；Adjustable attenuator one and adjustable attenuator two, the reference signal amplitude exported for adjusting orthogonal power splitter one, and will adjust Reference signal after whole is sent into synthesizer；Synthesizer, for the reference signal after adjustable attenuator one, two carries out range-adjusting to be combined to, produce one and do Reconstruction signal is disturbed, and is sent into coupler two；Coupler two, the interference reconstruction signal that synthesizer is sent out is coupled to reception system, offseted with receiving interference signal, and Residual signal will be offset and be sent into correlator one, correlator two and detection unit one, detection unit two；Correlator one and correlator two, the counteracting that reference signal and coupler two for orthogonal power splitter one to be exported export remain Remaining signal carries out coherent detection, and testing result is sent into controller；Detection unit one and detection unit two, what carrier signal and coupler two for being exported to orthogonal power splitter two exported supports The residual signal that disappears carries out coherent detection, and testing result is sent into controller；Controller, according to the carrier signal size of extraction, calculation process is carried out with the output result of detection unit one, two, is calculated Go out to offset remaining carrier signal size, and compared with setting value and adjudicate, be sent into the knot of control to correlator according to court verdict The control that fruit is locked and discharged, so as to realize the constant control to adjustable attenuator.
- A kind of 2. adaptive co-located Interference Suppression System that can reduce notch bandwidth as claimed in claim 1, it is characterised in that The detection unit is made up of analog multiplier and low pass filter.
- A kind of 3. adaptive co-located Interference Suppression System that can reduce notch bandwidth as claimed in claim 2, it is characterised in that The analog multiplier input is connected with the output of orthogonal power splitter two, and output is connected with low pass filter, and analog multiplier is realized Carrier signal and the product calculation for offsetting residual signal, operation result include DC quantity and of ac, and of ac is by LPF Device filters out, and DC quantity retains, and analog multiplier uses AD834, AD835 chip.
- 4. a kind of adaptive co-located Interference Suppression System that can reduce notch bandwidth as claimed in claim 2 or claim 3, its feature exist In the low pass filter input is connected with analog multiplier output, and output is connected with controller, and low pass filter is used to filter out The of ac of analog multiplier output, retain its DC quantity, and the DC quantity is sent into controller, the gain of low pass filter is 1, low pass filter uses OP77 chips.
- A kind of 5. adaptive co-located Interference Suppression System that can reduce notch bandwidth as claimed in claim 1, it is characterised in that The detection of carrier signal size is completed by AD8362 family chips in the controller, and DSP is high from C5000 or C6000 series Fast DSP.
- A kind of 6. adaptive co-located Interference Suppression System that can reduce notch bandwidth as claimed in claim 1, it is characterised in that The adjustable attenuator uses bipolarity electrically controlled attenuator or controllable step attenuator.
- A kind of 7. adaptive co-located Interference Suppression System that can reduce notch bandwidth as claimed in claim 1, it is characterised in that The correlator is made up of analog multiplier, integrator, and analog multiplier uses MC1954L or AD835 chips, and integrator uses OP77 chips.
- A kind of 8. adaptive co-located disturbance restraining method that can reduce notch bandwidth, using as claimed in claim 1 co-located dry Disturb suppression system, it is characterised in that methods described comprises the following steps：The first step, fraction transmission signal and carrier signal are extracted by coupler one, are respectively fed to orthogonal power splitter one and orthogonal Power splitter two, and the carrier signal of extraction is delivered into orthogonal power splitter two and controller；Second step, the transmission signal that orthogonal a pair of couplers of power splitter one extract do orthogonalization process, export two-way orthogonal reference Signal, it is respectively fed to adjustable attenuator one, correlator one and adjustable attenuator two, correlator two；3rd step, the carrier signal that orthogonal power splitter two extracts to coupler one do orthogonalization process, export two-way quadrature carrier Signal is extracted, is respectively fed to detection unit one and detection unit two；4th step, adjustable attenuator one and adjustable attenuator two carry out range-adjusting to the two-way reference signal of input, and by closing Grow up to be a useful person and do sum operation, output is re-fed into coupler two；5th step, the composite signal that synthesizer is sent into by coupler two are coupled to reception system, are supported with receiving interference signal Disappear, and extracted residual signal is offset to correlator one, detection unit one and correlator two, detection unit two；6th step, correlator one and correlator two are to the two-way for offsetting residual signal and orthogonal power splitter one from coupler two Reference signal carries out related operation, and operation result is sent into controller；7th step, detection unit one and detection unit two from coupler two to offsetting residual signal and orthogonal power splitter two Two-way quadrature carrier extraction signal carries out related operation, and operation result is sent into controller；8th step, controller to from coupler one carrier extract signal carry out power detection, and with detection unit one and inspection The testing result for surveying the feeding controller of unit two does the calculating of carrier cancellation residual signal, and by result of calculation compared with preset value, The control that the testing result for coming autocorrelator one and correlator two is locked and discharged by comparative result；9th step, the output of controller are used for the attenuation for controlling adjustable attenuator, realize the amplitude to its input reference signal Adjustment, interference signal is received for offsetting.
- A kind of 9. adaptive co-located disturbance restraining method that can reduce notch bandwidth as claimed in claim 8, it is characterised in that In 8th step, the control for being locked and being discharged to testing result is specifically：When the counteracting residue carrier signal that detection calculates is small In preset value, then correlation is locked, and adjustable attenuator is controlled by the correlation；When the counteracting residue carrier signal that detection calculates More than preset value, then correlation is discharged, correlation is adaptively adjusted by adaptive co-located Interference Suppression System, until detection calculates Counteracting residue carrier signal be less than preset value, lock correlation again.
- 10. a kind of adaptive co-located disturbance restraining method that can reduce notch bandwidth as claimed in claim 8 or 9, its feature It is, the specific implementation principle of methods described can be expressed as follows：Assuming that the reference signal that orthogonal power splitter one exports is：<mrow> <mfenced open = "{" close = ""> <mtable> <mtr> <mtd> <mrow> <msub> <mi>Z</mi> <mi>I</mi> </msub> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> <mo>=</mo> <munderover> <mo>&Sigma;</mo> <mrow> <mi>i</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>N</mi> </munderover> <msub> <mi>z</mi> <mi>i</mi> </msub> <mi>c</mi> <mi>o</mi> <mi>s</mi> <mrow> <mo>(</mo> <msub> <mi>&omega;</mi> <mi>i</mi> </msub> <mi>t</mi> <mo>)</mo> </mrow> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>Z</mi> <mi>Q</mi> </msub> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> <mo>=</mo> <munderover> <mo>&Sigma;</mo> <mrow> <mi>i</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>N</mi> </munderover> <msub> <mi>z</mi> <mi>i</mi> </msub> <mi>s</mi> <mi>i</mi> <mi>n</mi> <mrow> <mo>(</mo> <msub> <mi>&omega;</mi> <mi>i</mi> </msub> <mi>t</mi> <mo>)</mo> </mrow> </mrow> </mtd> </mtr> </mtable> </mfenced> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>1</mn> <mo>)</mo> </mrow> </mrow>The multicarrier orthogonal that respective orthogonal power splitter two exports extracts signal：<mrow> <mfenced open = "{" close = ""> <mtable> <mtr> <mtd> <mrow> <msub> <mi>Z</mi> <mrow> <mi>I</mi> <mi>j</mi> </mrow> </msub> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> <mo>=</mo> <msub> <mi>z</mi> <mi>j</mi> </msub> <mi>c</mi> <mi>o</mi> <mi>s</mi> <mrow> <mo>(</mo> <msub> <mi>&omega;</mi> <mi>j</mi> </msub> <mi>t</mi> <mo>)</mo> </mrow> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>Z</mi> <mrow> <mi>Q</mi> <mi>j</mi> </mrow> </msub> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> <mo>=</mo> <msub> <mi>z</mi> <mi>j</mi> </msub> <mi>s</mi> <mi>i</mi> <mi>n</mi> <mrow> <mo>(</mo> <msub> <mi>&omega;</mi> <mi>j</mi> </msub> <mi>t</mi> <mo>)</mo> </mrow> </mrow> </mtd> </mtr> </mtable> </mfenced> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>2</mn> <mo>)</mo> </mrow> </mrow>Interference Cancellation residual signal is：<mrow> <mi>R</mi> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> <mo>=</mo> <munderover> <mo>&Sigma;</mo> <mrow> <mi>i</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>N</mi> </munderover> <msub> <mi>I</mi> <mi>i</mi> </msub> <mi>c</mi> <mi>o</mi> <mi>s</mi> <mrow> <mo>(</mo> <msub> <mi>&omega;</mi> <mi>i</mi> </msub> <mi>t</mi> <mo>-</mo> <msub> <mi>&phi;</mi> <mi>i</mi> </msub> <mo>)</mo> </mrow> <mo>+</mo> <munderover> <mo>&Sigma;</mo> <mrow> <mi>l</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>M</mi> </munderover> <msub> <mi>D</mi> <mi>l</mi> </msub> <mi>c</mi> <mi>o</mi> <mi>s</mi> <mrow> <mo>(</mo> <msub> <mi>&omega;</mi> <mi>l</mi> </msub> <mi>t</mi> <mo>-</mo> <msub> <mi>&phi;</mi> <mi>l</mi> </msub> <mo>)</mo> </mrow> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>3</mn> <mo>)</mo> </mrow> </mrow>Wherein, ziIt is the amplitude of frequency component contained by reference signal, ωiFor the angular frequency of frequency component contained by reference signal, zjIt is Wherein carrier extract signal amplitude, ωjFor carrier signal angular frequency, IiBe offset residual interference signal frequency component amplitude, Dl It is the amplitude for offsetting remaining useful signal frequency component, ωlFor the angular frequency of frequency component contained by useful signal；It can be obtained by detection unit one and detection unit two：<mrow> <mfenced open = "{" close = ""> <mtable> <mtr> <mtd> <mrow> <mover> <mrow> <msub> <mi>Z</mi> <mrow> <mi>I</mi> <mi>j</mi> </mrow> </msub> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> <mi>R</mi> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> </mrow> <mo>&OverBar;</mo> </mover> <mo>=</mo> <mfrac> <mrow> <msub> <mi>z</mi> <mi>j</mi> </msub> <msub> <mi>I</mi> <mi>j</mi> </msub> </mrow> <mn>2</mn> </mfrac> <mi>c</mi> <mi>o</mi> <mi>s</mi> <mrow> <mo>(</mo> <msub> <mi>&phi;</mi> <mi>j</mi> </msub> <mo>)</mo> </mrow> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mover> <mrow> <msub> <mi>Z</mi> <mrow> <mi>Q</mi> <mi>j</mi> </mrow> </msub> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> <mi>R</mi> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> </mrow> <mo>&OverBar;</mo> </mover> <mo>=</mo> <mfrac> <mrow> <msub> <mi>z</mi> <mi>j</mi> </msub> <msub> <mi>I</mi> <mi>j</mi> </msub> </mrow> <mn>2</mn> </mfrac> <mi>s</mi> <mi>i</mi> <mi>n</mi> <mrow> <mo>(</mo> <msub> <mi>&phi;</mi> <mi>j</mi> </msub> <mo>)</mo> </mrow> </mrow> </mtd> </mtr> </mtable> </mfenced> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>4</mn> <mo>)</mo> </mrow> </mrow>Can be calculated the remaining carrier wave of detection counteracting by controller is：<mrow> <msub> <mi>I</mi> <mi>j</mi> </msub> <mo>=</mo> <msqrt> <mrow> <msup> <mover> <mrow> <msub> <mi>Z</mi> <mrow> <mi>I</mi> <mi>j</mi> </mrow> </msub> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> <mi>R</mi> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> </mrow> <mo>&OverBar;</mo> </mover> <mn>2</mn> </msup> <mo>+</mo> <msup> <mover> <mrow> <msub> <mi>Z</mi> <mrow> <mi>Q</mi> <mi>j</mi> </mrow> </msub> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> <mi>R</mi> <mrow> <mo>(</mo> <mi>t</mi> <mo>)</mo> </mrow> </mrow> <mo>&OverBar;</mo> </mover> <mn>2</mn> </msup> </mrow> </msqrt> <mo>/</mo> <mrow> <mo>(</mo> <msub> <mi>z</mi> <mi>j</mi> </msub> <mo>/</mo> <mn>2</mn> <mo>)</mo> </mrow> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>5</mn> <mo>)</mo> </mrow> </mrow>Compared by the detected value and setting value and the locking to correlator output value, adjustable constant is controlled so as to realize, after And ensure useful signal and be not attenuated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710810437.5A CN107453783B (en) | 2017-09-11 | 2017-09-11 | Adaptive co-location interference suppression system and method capable of reducing trapped wave bandwidth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710810437.5A CN107453783B (en) | 2017-09-11 | 2017-09-11 | Adaptive co-location interference suppression system and method capable of reducing trapped wave bandwidth |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107453783A true CN107453783A (en) | 2017-12-08 |
| CN107453783B CN107453783B (en) | 2020-11-06 |
Family
ID=60495152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710810437.5A Expired - Fee Related CN107453783B (en) | 2017-09-11 | 2017-09-11 | Adaptive co-location interference suppression system and method capable of reducing trapped wave bandwidth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107453783B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111030625A (en) * | 2019-12-30 | 2020-04-17 | 广州海格通信集团股份有限公司 | Self-adaptive multi-element orthogonal wave trap and wave trapping method thereof |
| CN112350782A (en) * | 2020-11-25 | 2021-02-09 | 深圳市百水来智能科技有限公司 | Co-location interference cancellation method |
| CN112953578A (en) * | 2021-01-22 | 2021-06-11 | 成都天奥信息科技有限公司 | Ground-air communication self-adaptive radio frequency interference canceller and optimization method thereof |
| CN114157387A (en) * | 2021-11-30 | 2022-03-08 | 湖北工业大学 | Adaptive co-location interference cancellation system with auxiliary channel and method |
| CN114157386A (en) * | 2021-11-30 | 2022-03-08 | 湖北工业大学 | Four-channel robust adaptive co-location interference cancellation system and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1430425A (en) * | 2001-12-31 | 2003-07-16 | 深圳市中兴通讯股份有限公司上海第二研究所 | Adaptive tracking cancellation control method of feed forward type linear power amplifier and equipment |
| US20130301488A1 (en) * | 2012-02-08 | 2013-11-14 | The Board Of Trustees Of The Leland Stanford Junior University | Systems and methods for cancelling interference using multiple attenuation delays |
| CN105812019A (en) * | 2016-04-29 | 2016-07-27 | 湖北工业大学 | Adaptive null-steering beam bandwidth self-leakage signal suppression system and method |
| CN206323376U (en) * | 2016-04-29 | 2017-07-11 | 湖北工业大学 | A kind of zero notch bandwidth self adaptation is from leakage signal suppression system |
-
2017
- 2017-09-11 CN CN201710810437.5A patent/CN107453783B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1430425A (en) * | 2001-12-31 | 2003-07-16 | 深圳市中兴通讯股份有限公司上海第二研究所 | Adaptive tracking cancellation control method of feed forward type linear power amplifier and equipment |
| US20130301488A1 (en) * | 2012-02-08 | 2013-11-14 | The Board Of Trustees Of The Leland Stanford Junior University | Systems and methods for cancelling interference using multiple attenuation delays |
| CN105812019A (en) * | 2016-04-29 | 2016-07-27 | 湖北工业大学 | Adaptive null-steering beam bandwidth self-leakage signal suppression system and method |
| CN206323376U (en) * | 2016-04-29 | 2017-07-11 | 湖北工业大学 | A kind of zero notch bandwidth self adaptation is from leakage signal suppression system |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111030625A (en) * | 2019-12-30 | 2020-04-17 | 广州海格通信集团股份有限公司 | Self-adaptive multi-element orthogonal wave trap and wave trapping method thereof |
| CN111030625B (en) * | 2019-12-30 | 2023-08-01 | 广州海格通信集团股份有限公司 | Self-adaptive multi-element orthogonal wave trap and wave trapping method thereof |
| CN112350782A (en) * | 2020-11-25 | 2021-02-09 | 深圳市百水来智能科技有限公司 | Co-location interference cancellation method |
| CN112953578A (en) * | 2021-01-22 | 2021-06-11 | 成都天奥信息科技有限公司 | Ground-air communication self-adaptive radio frequency interference canceller and optimization method thereof |
| CN114157387A (en) * | 2021-11-30 | 2022-03-08 | 湖北工业大学 | Adaptive co-location interference cancellation system with auxiliary channel and method |
| CN114157386A (en) * | 2021-11-30 | 2022-03-08 | 湖北工业大学 | Four-channel robust adaptive co-location interference cancellation system and method |
| CN114157387B (en) * | 2021-11-30 | 2024-04-09 | 湖北工业大学 | Self-adaptive co-location interference cancellation system and method with auxiliary channel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107453783B (en) | 2020-11-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107453783A (en) | A kind of adaptive co-located Interference Suppression System and method that can reduce notch bandwidth | |
| CN105812019B (en) | Zero notch bandwidth of one kind is adaptively from leakage signal suppressing method | |
| CN107517068B (en) | Co-site interference suppression system and method for simultaneously eliminating two interferences | |
| CN103760541B (en) | Interference waveform self-adaptation offset method and device for continuous wave detection | |
| US20090061808A1 (en) | Adaptive rf canceller system and method | |
| CN104168234B (en) | A kind of signal cancellation method and device of wireless telecommunication system | |
| US6714775B1 (en) | Interference canceller | |
| CN207573369U (en) | A kind of co-located Interference Suppression System for eliminating useful signal attenuation | |
| CN203057161U (en) | Self-adaption broadband interference cancellation device | |
| CN103986482A (en) | Method for suppressing passive intermodulation interference based on adaptive filtering | |
| CN107370502A (en) | A kind of anti-strong arrowband interference method based on spectral line processing | |
| CN103199808A (en) | Intermodulation offset device for passive device | |
| EP2720379B1 (en) | Ordered electromagnetic interference cancellation | |
| CN106959439A (en) | The strong interference suppression method and system of automobile frequency modulated continuous wave radar | |
| CN206323376U (en) | A kind of zero notch bandwidth self adaptation is from leakage signal suppression system | |
| CN106772254A (en) | The improved transceiver insulation method based on digital adaptation interference cancellation | |
| CN105259559A (en) | Beidou RDSS navigation type receiver narrowband interference detection and suppression method | |
| CN107346979A (en) | A kind of radio frequency self-interference suppressing method based on correlation energy | |
| CN104502925A (en) | Narrowband interference resisting system and method based on adaptive signal processing | |
| CN105187343A (en) | Method and device for reducing self interference in same-time and same-frequency full-duplex system | |
| CN207304568U (en) | A kind of co-located Interference Suppression System with bandwidth reduction ability | |
| CN101527584A (en) | Spread-spectrum pseudo code detection method based on frequency domain amplitude processing | |
| WO2013176590A1 (en) | Method, base station and apparatus in a base station for reducing intermodulation distortion | |
| CN209748549U (en) | Interference cancellation device based on interference cancellation | |
| CN113824458B (en) | Three-channel self-adaptive co-location broadband interference suppression method and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201106 Termination date: 20210911 |