CN109738872A - A kind of radar Cochannel interference method and device - Google Patents
A kind of radar Cochannel interference method and device Download PDFInfo
- Publication number
- CN109738872A CN109738872A CN201910028300.3A CN201910028300A CN109738872A CN 109738872 A CN109738872 A CN 109738872A CN 201910028300 A CN201910028300 A CN 201910028300A CN 109738872 A CN109738872 A CN 109738872A
- Authority
- CN
- China
- Prior art keywords
- signal
- processing unit
- radar
- signal processing
- echo
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 40
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims abstract description 47
- 238000001914 filtration Methods 0.000 claims description 26
- 230000006870 function Effects 0.000 claims description 12
- 230000003321 amplification Effects 0.000 claims description 11
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 4
- 230000008054 signal transmission Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 6
- 230000010355 oscillation Effects 0.000 description 5
- 230000001133 acceleration Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- VMXUWOKSQNHOCA-UKTHLTGXSA-N ranitidine Chemical compound [O-][N+](=O)\C=C(/NC)NCCSCC1=CC=C(CN(C)C)O1 VMXUWOKSQNHOCA-UKTHLTGXSA-N 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000001427 coherent effect Effects 0.000 description 2
- 239000000306 component Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005923 long-lasting effect Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000007781 pre-processing Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000009131 signaling function Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
Landscapes
- Radar Systems Or Details Thereof (AREA)
Abstract
The invention discloses a kind of radar Cochannel interference method and devices, wherein, radar Cochannel interference method includes: that step S1, filter circuit reduce the difference power of high frequency section and low frequency part in baseband signal and filter out base band out of band signal in the baseband signal；Step S2, signal processing unit automatically adjusts the gain amplifier of automatic gain amplifying circuit according to the received echo-signal of receiving antenna；Step S3, signal processing unit changes the frequency of the radiofrequency signal of signal generation unit generation at random；Step S4, signal processing unit filters out co-channel interference signal by method for tracking target.The embodiment of the present invention solves the problems, such as co-channel interference between radar.
Description
Technical field
The present embodiments relate to automotive safety control technology field more particularly to a kind of radar Cochannel interference method and
Device.
Background technique
With the improvement of people ' s living standards with science and technology progress, automobile have become everybody trip work of riding instead of walk
Tool, brings and also brings some potential safety problems while convenience.In recent years, the radar based on millimeter-wave technology produces
The a part of product as car steering auxiliary system, becomes the standard fitting of many automobiles.Vehicle-mounted millimeter wave radar compared to
Video system is not influenced by external conditions such as weather, temperature, humidity, is applied and is developed, example at many aspects of vehicle
Such as adaptive learning algorithms (ACC), automatic emergency brake system (AEB), blind area detection system (BSD), sidewalk auxiliary system
(LCA) etc..
The basic principle of vehicle-mounted millimeter wave radar system be signal generate control unit generate radiofrequency signal (24GHz or
77GHz) after power amplifier amplifies, be emitted in the air by array antenna, electromagnetic wave signal encounter vehicle, personnel or
The targets back reflection such as atural object returns radar system, microwave telecommunication number is converted by receiving antenna, using low noise amplification and thunder
Baseband signal is converted to up to local oscillation signal mixing, after amplifying, being filtered, signal processing unit carries out corresponding baseband signal
Processing detection obtain the information such as range-to-go, speed, angle, echo power.
It is a large amount of universal with vehicle-mounted millimeter radar, when the vehicle equipped with millimetre-wave radar on the way when driving, if met
To when being also provided with the vehicle of same money or transmitting with frequency range millimetre-wave radar, easily shape between the millimetre-wave radar of two vehicles
At the co-channel interference between transmitting signal.Base band after millimetre-wave radar receiving channel local oscillation signal and interference signal are mixed at this time
Signal, if fallen in the receiver baseband bandwidth of radar, Radar Signal Processing detection part can be interference signal as useful
Target is handled, to make radar form false target, and when two radar relative positions are closer, into radar antenna
Interfering signal power is significantly larger than realistic objective reflection signal to be passed through after interference signal and radar receiver local oscillation signal are mixed
Base band amplification is likely to be saturated receiving channel amplifier, forms obstruction interference, causes radar work abnormal.Therefore practical vehicle
In driving process, the problems such as millimetre-wave radar will appear detection of false target, failure.
Summary of the invention
The present invention provides a kind of radar Cochannel interference method and device, to solve the problems, such as co-channel interference between radar.
In a first aspect, the embodiment of the invention provides a kind of radar Cochannel interference methods, comprising:
Step S1, filter circuit reduces the difference power of high frequency section and low frequency part in baseband signal and filters out described
Base band out of band signal in baseband signal；
Step S2, signal processing unit automatically adjusts automatic gain amplifying circuit according to the received echo-signal of receiving antenna
Gain amplifier；
Step S3, signal processing unit changes the frequency of the radiofrequency signal of signal generation unit generation at random；
Step S4, signal processing unit filters out co-channel interference signal by method for tracking target.
Optionally, the filter circuit reduces the difference power of high frequency section and low frequency part in baseband signal and filters out
Base band out of band signal in the baseband signal, comprising:
Step S11, high-pass filtering circuit reduces the difference power of high frequency section and low frequency part in baseband signal；
Step S12, low-pass filter circuit filters out the base band out of band signal in the baseband signal；
The filter circuit includes high-pass filtering circuit and low-pass filter circuit.
Optionally, the signal processing unit is according to the received echo-signal automatic adjustment automatic gain amplification of receiving antenna
The gain amplifier of circuit, comprising:
Step S21, after radar powers on, signal processing unit sets default for the gain amplifier of automatic gain amplifying circuit
Value Aavg；
Step S22, signal processing unit control signal generation unit periodically generates radiofrequency signal, and obtains reception day
The maximum echo power level P of the received echo-signal of linemax；
Step S23, signal processing unit calculates default echo power level PavgWith the maximum echo power level Pmax
Difference P, P=Pavg-Pmax；
Step S24, signal processing unit passes through formulaGain amplifier multiple A is calculated, and passes through formula Anew=
Aavg× A calculates amplifying circuit gain Anew；
Step S25, the gain amplifier of signal processing unit setting automatic gain amplifying circuit is Anew；
Step S26, step S22 to step S25 is repeated.
Optionally, the signal processing unit changes the frequency of the radiofrequency signal of signal generation unit generation at random, comprising:
Step S31, signal processing unit controls the frequency of the radiofrequency signal in the initial period of the signal generation unit
For f0；
Step S32, a positive number m less than 1 is randomly generated in signal processing unit, by m multiplied by radar maximum BREATHABLE BANDWIDTH
ΔBmax, obtain the frequency shift value Δ f of the radiofrequency signal in the signal generation unit next period0=m × Δ Bmax；
Step S33, signal processing unit controls the frequency for the radiofrequency signal that the signal generation unit generated in the next period
Rate is f=f0+Δf0；
Step S36, step S32 and step S33 is repeated.
Optionally, a positive number m less than 1 is randomly generated in the signal processing unit, comprising:
Signal processing unit generates a random number x by rand () function in C language；
X divided by the largest random number RAND_MAX of rand () function, is obtained a positive number less than 1 by signal processing unit
m。
Optionally, the signal processing unit filters out co-channel interference signal by method for tracking target and includes:
Step S41, signal processing unit filters out the interference signal outside goal-selling speed interval；
Step S42, signal processing unit filters out the interference outside radar surveying angular range and outside radar surveying distance range
Signal；
Step S43, signal processing unit is according to the received first echo signal of two neighboring period receiving antenna and second
Echo-signal determines actual signal and interference signal；
Step S44, signal processing unit filters out co-channel interference signal according to formula x (k+1)=x (k)+Tv (k)；
Wherein, x (k+1) indicates current goal position, and x (k) indicated the target position in a upper period, and T indicates the radar
The signal processing period, v (k) indicated the speed of the target in upper period.
Optionally, signal processing unit is according to the received first echo signal of two neighboring period receiving antenna and second time
Wave signal determines actual signal and interference signal includes:
Signal processing unit is by the received first echo signal of receiving antenna and second echo signal in the two neighboring period
Middle distance difference is confirmed as actual signal less than the signal of the second preset value less than the first preset value and relative velocity difference；It is no
Then, it is confirmed as interference signal.
Second aspect, the embodiment of the invention also provides a kind of radar Cochannel interference devices, comprising:
Filter circuit, for reducing the difference power of high frequency section and low frequency part in baseband signal and filtering out the base
Base band out of band signal in band signal；
Automatic gain amplifying circuit, for amplifying baseband signal；
Signal processing unit, for according to the received echo-signal automatic adjustment automatic gain amplifying circuit of receiving antenna
Gain amplifier, the random frequency for changing the radiofrequency signal that signal generation unit generates, and filtered out together by method for tracking target
Frequency interference signal；
The signal processing unit is electrically connected with the filter circuit and the automatic gain amplifying circuit respectively.
Optionally, the filter circuit includes:
High-pass filtering circuit, for reducing the difference power of high frequency section and low frequency part in baseband signal；
Low-pass filter circuit, for filtering out the base band out of band signal in the baseband signal.
Optionally, the radar Cochannel interference device, further includes: transmitting antenna, the first power amplifier, signal generate
Unit, receiving antenna, the second power amplifier, frequency mixer and A/D Acquisition Circuit；
The signal generation unit is electrically connected with the signal processing module, for the control in the signal processing module
The generation radiofrequency signal of periodical；
First power amplifier is electrically connected with the signal generation unit, is produced for amplifying the signal generation unit
The raw radiofrequency signal；
The transmitting antenna is electrically connected with first power amplifier, passes through first power amplifier for emitting
Amplified radiofrequency signal；
The receiving antenna is used for receives echo-signal；
Second power amplifier is electrically connected with the receiving antenna, time received for amplifying the receiving antenna
Wave signal；
The frequency mixer is electrically connected with second power amplifier and the filter circuit respectively, for by described the
The amplified echo-signal of two power amplifiers is converted to baseband signal, and by the base band signal transmission to the filtered electrical
Road；
The A/D acquisition module is electrically connected with the automatic gain amplifying circuit and signal processing unit respectively, is used for
The baseband signal after the automatic gain amplifying circuit gain amplifier is converted into digital signal, and is sent to the letter
Number processing unit.
The present invention is reduced in baseband signal according to the difference of vehicle target echo-signal and interference signal by filter circuit
High frequency section and low frequency part difference power and filter out base band out of band signal in the baseband signal, signal processing unit
According to the gain amplifier of the received echo-signal automatic adjustment automatic gain amplifying circuit of receiving antenna, pass through signal processing unit
Change the frequency for the radiofrequency signal that signal generation unit generates at random and co-channel interference signal filtered out by method for tracking target,
To solve the problems, such as co-channel interference between radar.
Detailed description of the invention
Fig. 1 is a kind of flow chart of radar Cochannel interference method provided in an embodiment of the present invention；
Fig. 2 is a kind of structural block diagram of radar Cochannel interference device provided in an embodiment of the present invention；
Fig. 3 is the schematic diagram of high-pass filtering circuit provided in an embodiment of the present invention；
Fig. 4 is the schematic diagram of the amplitude-versus-frequency curve of high-pass filtering circuit provided in an embodiment of the present invention；
Fig. 5 is the schematic diagram of low-pass filter circuit provided in an embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Fig. 1 is a kind of flow chart of radar Cochannel interference method provided in an embodiment of the present invention, and Fig. 2 is that the present invention is implemented
A kind of structural block diagram for radar Cochannel interference device that example provides, it is referring to fig. 1 and fig. 2, provided in an embodiment of the present invention
Radar Cochannel interference method includes the following steps:
Step S1, filter circuit 109 reduces the difference power of high frequency section and low frequency part in baseband signal and filters out
Base band out of band signal in the baseband signal.
Step S2, signal processing unit 101 automatically adjusts automatic gain according to the received echo-signal of receiving antenna 106 and puts
The gain amplifier of big circuit 103.
Step S3, signal processing unit 101 changes the frequency for the radiofrequency signal that signal generation unit 102 generates at random.
Step S4, signal processing unit 101 filters out co-channel interference signal by method for tracking target.
Refering to what is shown in Fig. 2, a kind of radar Cochannel interference device provided in an embodiment of the present invention include: filter circuit 109,
Automatic gain amplifying circuit 103, signal processing unit 101, transmitting antenna 105, the first power amplifier 104, signal generate single
Member 102, receiving antenna 106, the second power amplifier 107, frequency mixer 108 and A/D Acquisition Circuit 120；Wherein, automatic gain is put
Big circuit 103, for amplifying baseband signal；Signal processing unit 101 is electric with filter circuit 109 and automatic gain amplification respectively
Road 103 is electrically connected, and signal generation unit 102 is electrically connected 101 with signal processing module, for the control in signal processing module 101
The generation radiofrequency signal of periodical processed；First power amplifier 104 is electrically connected with signal generation unit 102, for amplifying letter
Number generate unit 102 generate radiofrequency signal；Transmitting antenna 105 is electrically connected with the first power amplifier 104, is passed through for emitting
The amplified radiofrequency signal of first power amplifier 104；Receiving antenna 106 is used for receives echo-signal；Second power amplifier
107 are electrically connected with receiving antenna 106, the echo-signal received for amplifying receiving antenna 106；Frequency mixer 108 is respectively with
Two power amplifiers 107 and filter circuit 109 are electrically connected, and are used for the amplified echo-signal of the second power amplifier 107
Be converted to baseband signal, and by base band signal transmission to filter circuit 109；A/D acquisition module 120 is put with automatic gain respectively
Big circuit 103 and signal processing unit 101 are electrically connected, for that will believe through the amplified base band of automatic gain amplifying circuit 103
Number digital signal is converted to, and is sent to the signal processing unit 101.
Signal processing unit 101 is the core component of radar Cochannel interference device, controls the letter of signal generation unit 102
It number generates, the gain amplifier of control automatic gain amplifying circuit (AGC) 103 and carry out signal-data processing and analysis.Signal
Generate the radiofrequency signal that unit 102 generates multiple waveforms under the control of signal processing unit 101, such as linear frequency modulation continuous wave
Signal (LFM), frequency shift keying (FSK) or continuous wave signal (CW) etc., the radiofrequency signal that signal generation unit 102 generates, warp
After crossing the amplification of the first power amplifier 104, it is radiated in the air by transmitting antenna 105.The radiofrequency signal of transmitting is reflected
Afterwards, the echo-signal of generation is received antenna 106 and is received and converted to electric signal, and electric signal passes through the second power amplifier 107
Amplification, then baseband signal is converted to after the mixing of frequency mixer 108.Baseband signal is put by the filtering of filter circuit 109, automatic gain
After big circuit 103 amplifies, analog baseband signal is converted to digital data transmission to signal processing unit by A/D acquisition module 120
101 are handled.
Radar Cochannel interference method provided in an embodiment of the present invention is reduced in baseband portion by filter circuit 109 first
The difference power of high frequency section and low frequency part in baseband signal so that high frequency section and low frequency part in baseband signal function
Rate is balanced, amplifies processing convenient for subsequent automatic gain amplifying circuit 103, and filter out base band using filter circuit 109 and believe
Base band out of band signal in number, excludes the interference signal outside radar Cochannel interference device investigative range, and synchronous signal processing is single
Member 101 automatically adjusts the gain amplifier of automatic gain amplifying circuit 103 according to the received echo-signal of receiving antenna 106, avoids
Co-channel interference signal causes the energy of channel base band signal to block, and guarantees that channel base band signal does not occur the phenomenon that signal saturation,
Then the frequency for changing the radiofrequency signal that signal generation unit 102 generates at random by signal processing unit 101 avoids dry with frequency
It disturbs and causes long lasting effect, the digital signal that signal processing unit 101 again converts A/D acquisition module 120 carries out data processing, leads to
It crosses method for tracking target and filters out co-channel interference signal, to solve the problem of co-channel interference between radar.
Optionally, filter circuit 109 includes high-pass filtering circuit and low-pass filter circuit, and filter circuit 109 reduces base band
The difference power of high frequency section and low frequency part in signal and filter out base band out of band signal in the baseband signal, comprising:
Step S11, high-pass filtering circuit reduces the difference power of high frequency section and low frequency part in baseband signal.
Step S12, low-pass filter circuit filters out the base band out of band signal in the baseband signal.
Radar emission radiofrequency signal, the baseband signal converted apart from the reflected echo-signal of the farther away target of radar
Frequency is higher, and power is lower；The frequency of baseband signal apart from the reflected echo-signal conversion of the closer target of radar compared with
Low, power is larger；Baseband signal passes through automatic gain amplifying circuit 103, and high frequency section is identical with the amplification factor of low frequency part,
If therefore the signal power of high frequency section is made to be amplified to ideal multiple, the signal of low frequency part may draw greatly very much because of power
Play the energy obstruction of channel base band signal.Fig. 3 is the schematic diagram of high-pass filtering circuit provided in an embodiment of the present invention, with reference to Fig. 3
Shown, high-pass filtering circuit realizes the high frequency section and low frequency reduced in baseband signal using cascade single order high-pass filter
The function of partial difference power, the baseband signal of input are first connected a capacitor C1, and then a resistance R1 in parallel realizes high pass
Filter function, Fig. 4 is the schematic diagram of the amplitude-versus-frequency curve of high-pass filtering circuit provided in an embodiment of the present invention, with reference to Fig. 4 institute
Show, the baseband signal of input is filtered using the intermediate zone between the passband and stopband of high-pass filtering circuit, hinders base band letter
Number low frequency part pass through so that the power of baseband signal low frequency part reduces, the lower part of frequency in baseband signal, decaying
It is bigger, that is, the frequency sensitivity control (SFC) of baseband signal is realized, so that baseband signal high frequency section and low frequency part
Power equalization, amplify processing convenient for subsequent automatic gain amplifying circuit 103, the energy of channel base band signal avoided to hinder
Plug.
The cutoff frequency f of high-pass filtering circuitLCalculation formula beOptionally, section of high-pass filtering circuit
Only frequency fLFor radar baseband bandwidth BR1/3-1/2, it is preferred that the cutoff frequency f of high-pass filtering circuitLFor radar base band band
Wide BRHalf, i.e. 0.5BR, cutoff frequency fLThe too small effect that will lead to frequency sensitivity control (SFC) is bad, cutoff frequency fL
It is excessive to will lead to a part of low frequency signal loss.
The base band out of band signal in baseband signal is filtered out using low-pass filter circuit, base band out of band signal includes co-channel interference
Echo signal and noise signal other than the spurious signal of generation, radar EFFECTIVE RANGE etc., Fig. 5 mentions for the embodiment of the present invention
The schematic diagram of the low-pass filter circuit of confession, refering to what is shown in Fig. 5, low-pass filter circuit is realized using passive RC filter, optionally,
The cutoff frequency of low-pass filter circuit is radar baseband bandwidth BR1.2 times, i.e. 1.2BR。
Optionally, low-pass filter circuit is frequency overlapped-resistable filter, reduces aliasing frequency component, is believed outside base band band so that filtering out
Number effect it is more preferable.
Optionally, signal processing unit 101 automatically adjusts automatic gain according to the received echo-signal of receiving antenna 106 and puts
The gain amplifier of big circuit 103, comprising:
Step S21, after radar powers on, the gain amplifier of automatic gain amplifying circuit 103 is arranged signal processing unit 101
For preset value Aavg；
Step S22, signal processing unit 101 controls signal generation unit 103 and periodically generates radiofrequency signal, and obtains
The maximum echo power level P of the received echo-signal of receiving antenna 103max；
Step S23, signal processing unit 101 calculates default echo power level PavgWith maximum echo power level Pmax's
Difference P, P=Pavg-Pmax；
Step S24, signal processing unit 101 passes through formulaGain amplifier multiple A is calculated, and passes through formula Anew
=Aavg× A calculates amplifying circuit gain Anew；
Step S25, it is A that the gain amplifier of automatic gain amplifying circuit 103, which is arranged, in signal processing unit 101new；
Step S26, step S22 to step S25 is repeated.
Refering to what is shown in Fig. 2,106 receives echo-signal of receiving antenna, along the transmission direction of echo-signal, from receiving antenna
106 arrive this part of referred to as receiving channel of A/D acquisition module 120, what the receiving channel of Radar Products currently on the market used
All it is fixed gain amplifier, radar system receiving channel is determined according to the energy of the echo-signal of vehicle and clutter reflections when design
Gain amplifier, be no longer adjusted in later period use process.If two frequency positions with model or transmitting radiofrequency signal
When the radar forward direction of same frequency band is opposite, the energy of the radiofrequency signal of radar direct irradiation is far longer than the targets such as vehicle and atural object
The energy of the echo-signal of reflection, if radar receiving channel uses fixed gain amplifier, what other radars directly launched
Radiofrequency signal is likely to cause radar receiving channel energy obstruction, so that radar receiving channel is saturated, radar loses normal detection
The ability of target, radar function failure, or even cause radar component damage.
The present invention replaces the fixed gain amplifier of radar in the prior art, automatic gain using automatic gain amplifying circuit
Amplifying circuit 103 is for amplifying baseband signal, and signal processing unit 101 is according to the function of the received echo-signal of receiving antenna 106
Rate automatically adjusts the gain amplifier of automatic gain amplifying circuit 103, locates the power of baseband signal in radar receiving channel always
In fixed level, guarantee the stabilization of the power of baseband signal in radar receiving channel.
Specifically, the gain amplifier of automatic gain amplifying circuit 103 is arranged signal processing unit 101 after radar powers on
For preset value Aavg, optionally, automatic gain amplification is gone out according to the power calculation of the echo-signal of the targets such as vehicle and atural object reflection
The mean value of gain amplifier required for circuit 103 is set as preset value Aavg。
Signal processing unit 101 controls signal generation unit 103 and periodically generates radiofrequency signal, and obtains receiving antenna
The maximum echo power level P of 103 received echo-signalsmax, specifically, signal processing unit 101 controls signal generation unit
103 periodically generate radiofrequency signal, and transmitting antenna 105 emits the radiofrequency signal in a repetition period, and receiving antenna 106 receives
The echo-signal of current period, signal processing unit 101 acquire the echo-signal of current period, and do to received echo-signal
Power spectrumanalysis obtains maximum echo power level Pmax.Signal processing unit 101 calculates default echo power level PavgWith most
Big echo power level PmaxDifference P, P=Pavg-Pmax, optionally, the echo-signal reflected according to targets such as vehicle and atural objects
Power confirm default echo power level Pavg.Then signal processing unit 101 passes through formulaCalculate gain amplifier times
Number A, and pass through formula Anew=Aavg× A calculates amplifying circuit gain Anew, and automatic gain is arranged in signal processing unit 101
The gain amplifier of amplifying circuit 103 is Anew.Then, transmitting antenna 105 continues to emit the radiofrequency signal in a repetition period, letter
Number processing unit 101 acquires the echo-signal of current period, obtains maximum echo power level Pmax1.Signal processing unit 101
Calculate the maximum echo power level P obtained a upper rf periodmaxWith Pmax1Difference P1, P1=Pmax-Pmax1, then signal
Processing unit 101 passes through formulaGain amplifier multiple A1 is calculated, and passes through formula Anew1=Anew× A1 calculates amplification electricity
Road gain Anew1, and it is A that the gain amplifier of automatic gain amplifying circuit 103, which is arranged, in signal processing unit 101new1.Then, it sends out
It penetrates antenna 105 to continue to emit the radiofrequency signal in a repetition period, repeat the above steps, so that 101 basis of signal processing unit
The amplification that the maximum echo power level of the echo-signal of real-time period feedback to adjust automatic gain amplifying circuit 103 in real time increases
Benefit guarantees the stabilization of the power of baseband signal in radar receiving channel.
Optionally, signal processing unit 101 changes the frequency for the radiofrequency signal that signal generation unit 102 generates, packet at random
It includes:
Step S31, signal processing unit 101 controls the frequency of the radiofrequency signal in the initial period of signal generation unit 102
Rate is f0；
Step S32, a positive number m less than 1 is randomly generated in signal processing unit 101, by m multiplied by radar maximum adjustable band
Wide Δ Bmax, obtain the frequency shift value Δ f of the radiofrequency signal in the next period of signal generation unit 1020=m × Δ Bmax；
Step S33, signal processing unit 101 controls the radiofrequency signal that signal generation unit 102 generated in the next period
Frequency is f=f0+Δf0；
Step S36, step S32 and step S33 is repeated.
The frequency of the radiofrequency signal of transmitting antenna transmitting is denoted as f0, bandwidth B, for linear FM signal (LFM), instantaneously
Frequency can be expressed asWherein, T is the repetition period, and t is the time,It is expressed as chirp rate.When other
The co-channel interference signal of radar is received by the receiving antenna 106 of this vehicle radar, passes through frequency mixer 108 and signal generation unit 102
The local oscillation signal of generation is mixed, and obtains the frequency Δ f=f of baseband signalInterference-fLocal oscillator, wherein fInterferenceIt is the frequency of co-channel interference signal
Rate, fLocal oscillatorFor the frequency of local oscillation signal, if Δ f is in the bandwidth B of this vehicle radar baseband signalRInterior, this vehicle radar will receive dry with frequency
Disturb the interference of signal.
The baseband signal bandwidth B of usual radarRMuch smaller than signal generation unit 102 generate radiofrequency signal bandwidth B, because
This changes the frequency f of the radiofrequency signal of this vehicle radar emission0, maximum probability can make co-channel interference signal delta f in baseband signal band
Wide BROutside, therefore the frequency f of radiofrequency signal that once emits of each repetition cyclomorphosis0, it is dry that same frequency between radar can be reduced
It disturbs.
There is bandwidth requirement in country to radar working frequency, is denoted as Bmax, it is assumed that the radio frequency signal frequency f of initial radar emission0
The low-limit frequency allowed using national standard, then the frequency f of the radiofrequency signal of radar emission0The maximum magnitude that can change is i.e. most
Big BREATHABLE BANDWIDTH Δ Bmax=Bmax- B, illustratively, the working frequency of millimetre-wave radar are 76GHz-81GHz, then Bmax=
5GHz, it is assumed that the bandwidth B of the radiofrequency signal of radar emission is 1GHz, the radio frequency signal frequency f of initial radar emission0Using country
The low-limit frequency that standard allows, i.e. 76GHz, the then maximum BREATHABLE BANDWIDTH Δ B of the radiofrequency signal of radar emissionmax=Bmax- B=
5GHz-1GHz=4GHz.
Illustratively, after radar powers on, 101 initializing signal of signal processing unit generates unit 102, makes its initial period
Generate the frequency f of radiofrequency signal0For the low-limit frequency that national standard allows, transmitting antenna 106 emits penetrating for repetition period
Frequency signal；A positive number m less than 1 is randomly generated in signal processing unit 101, by m multiplied by radar maximum BREATHABLE BANDWIDTH Δ Bmax,
Obtain the frequency shift value Δ f of the radiofrequency signal in 102 second repetition periods of signal generation unit0=m × Δ Bmax；At signal
It manages unit 101 and reconfigures signal generation unit 102 second repetition period, it is made to generate the frequency f=of radiofrequency signal
f0+Δf0；Then, signal processing unit 101 continues that a positive number m less than 1 is randomly generated1, by m1It is adjustable multiplied by radar maximum
Bandwidth deltaf Bmax, obtain the frequency shift value Δ f of the radiofrequency signal in 102 third repetition period of signal generation unit01=m1×Δ
Bmax；Signal processing unit 101 reconfigures signal generation unit 102 in the third repetition period, it is made to generate the frequency of radiofrequency signal
Rate is f1=f0+Δf01, and so on, it repeats the above steps, to avoid generating the homogenous frequency signal interference between radar.
Optionally, signal processing unit 101 reconfigures a signal generation unit 102 per N number of repetition period, to change
The frequency of radiofrequency signal, the difference of signal algorithm is handled according to different radars, and some radars need to believe N number of continuous repetition period
Number coherent processing is done, therefore it is required that the radiofrequency signal of this N number of continuous repetition period radar emission is identical, signal in this case
Processing unit 101 reconfigures a signal generation unit 102 per N number of repetition period, to change the frequency of radiofrequency signal, if
It is interfered in certain N number of repetition period radar by homogenous frequency signal, signal processing unit 101 is in subsequent N number of repetition cyclomorphosis radio frequency
The frequency of signal, it will be able to the homogenous frequency signal be avoided to interfere.
Optionally, a positive number m less than 1 is randomly generated in signal processing unit 101, comprising:
Signal processing unit 101 generates a random number x by rand () function in C language；
X divided by the largest random number RAND_MAX of rand () function, is obtained one less than 1 by signal processing unit 101
Positive number m.
Optionally, signal processing unit 101 filters out co-channel interference signal by method for tracking target and includes:
Step S41, signal processing unit 101 filters out the interference signal outside goal-selling speed interval.
Step S42, signal processing unit 101 filters out dry outside radar surveying angular range and outside radar surveying distance range
Disturb signal.
Step S43, signal processing unit 101 determines true according to the received echo-signal of two neighboring period receiving antenna
Signal and interference signal.
Step S44, signal processing unit 101 filters out co-channel interference signal according to formula x (k+1)=x (k)+Tv (k)；Its
In, x (k+1) indicates current goal position, and x (k) indicated the target position in a upper period, and T indicates the signal processing period of radar,
V (k) indicated the speed of the target in a upper period.
Usual radar is able to detect the information such as distance, relative velocity, angle, the echo power of target, whether detects thunder
Up to the front vehicles perhaps targets such as barrier or the detection radar rear or targets such as side vehicle or barrier, target
Always there is opposite motion profile relative to radar, and the co-channel interference signal between radar does not have the trend of motion profile, because
This can filter out the co-channel interference signal that radar receives by target trajectory tracking processing method, i.e. method for tracking target.
Firstly, signal processing unit 101 filters out the interference signal outside goal-selling speed interval, optionally, goal-selling
Speed interval is -250km/h~+250km/h.Illustratively, for vehicle-mounted millimeter wave radar, the velocity interval of target is general
Between -250km/h~+250km/h, in data preprocessing phase, signal processing unit 101 is speed not in this section
Echo signal filters out.Likewise, in data preprocessing phase, signal processing unit 101 according to radar surveying angular range and away from
From range, the interference signal outside radar surveying angular range and outside radar surveying distance range is filtered out.
In targetpath establishment stage, signal processing unit 101 is according to two neighboring period receiving antenna 106 received
One echo-signal and second echo signal determine actual signal and interference signal.Illustratively, receiving antenna 106 is in the period 1
First echo signal is received, receiving antenna 106 receives second echo signal in second round, due to radar and generates co-channel interference
The radar of signal not coherent, therefore radar differs greatly in the co-channel interference signal that period 1 and second round receive,
And radar is consistent what is received in period 1 and second round by the reflected actual signal of real-world object, therefore
The first echo signal and the second echo that signal processing unit 101 is received by comparing radar in period 1 and second round
Signal can determine actual signal and interference signal, to exclude the interference signal.
Optionally, signal processing unit 101 according to the received first echo signal of two neighboring period receiving antenna 106 and
Second echo signal determines actual signal and interference signal includes:
Signal processing unit 101 is by the received first echo signal of receiving antenna 106 in the two neighboring period and second time
Distance difference is confirmed as really less than the first preset value and relative velocity difference less than the signal of the second preset value in wave signal
Signal；Otherwise, it is confirmed as interference signal.
Illustratively, receiving antenna 106 receives first echo signal in the period 1, and receiving antenna 106 is in second round
Second echo signal is received, signal processing unit 101 is by distance difference in first echo signal and second echo signal less than the
One preset value and relative velocity difference are confirmed as actual signal less than the signal of the second preset value；Otherwise, it is confirmed as interference letter
Number.Specifically, signal processing unit 101, which acquires first echo signal and carries out signal processing, obtains multiple first object signals,
There may be co-channel interference signals in multiple first object signals；The equally acquisition second echo signal of signal processing unit 101 is simultaneously
It carries out signal processing and obtains multiple second echo signals, be also likely to be present co-channel interference signal in multiple second echo signals；It will
Each first object signal is matched with the second echo signal, will wherein distance difference it is less than the first preset value and relatively fast
It spends difference and is confirmed as actual signal less than the first object signal of the second preset value and the second echo signal；Otherwise, it determines being dry
Disturb signal.
Optionally, the first preset value is 5m, and the second preset value is 4m/s, and the first preset value and the second preset value can bases
The Performance inference of radar.
By above-mentioned steps, it substantially can be avoided most homogenous frequency signal interference, but there is likely to be distance differences
It is practical less than the first object signal of the second preset value and the second echo signal less than the first preset value and relative velocity difference
The case where being above co-channel interference signal, this part co-channel interference signal can be filtered out according to the equation of future position at this time.
Radar target tracking method is usually realized under rectangular coordinate system, in object tracking process, can be used linear
Equation extrapolates to the kinetic characteristic of target, if to the velocity and acceleration that sets the goal, the position prediction of target can be with
Use linear equationIt indicates, wherein x (k+1) indicates current goal position, x
(k) target position in a upper period was indicated, T indicates the signal processing period of radar, optionally, the signal processing cycle T of radar
For a repetition period or N number of repetition cycle time, v (k) indicated the speed of the target in a upper period, and a (k) is indicated upper one week
The acceleration of the target of phase.The signal processing period of usual radar, i.e. T < 50ms, hundred meters of general vehicle accelerated within 50ms
Time, acceleration was in 20m/s at 5 seconds or so2, therefore the target position variable quantity very little as caused by acceleration in linear equation,
It can ignore in practical applications, therefore the position prediction equation of target can simplify as x (k+1)=x (k)+Tv (k), signal
Processing unit 101 can filter out co-channel interference signal according to formula x (k+1)=x (k)+Tv (k), if the vehicle that radar receives
Or the echo signal of the generations such as barrier meets the position prediction equation of target, it is determined that is actual signal, otherwise, it determines being
Interference signal, to filter out co-channel interference signal.
Radar Cochannel interference method provided in an embodiment of the present invention is reduced in baseband portion by filter circuit 109 first
The difference power of high frequency section and low frequency part in baseband signal so that high frequency section and low frequency part in baseband signal function
Rate is balanced, amplifies processing convenient for subsequent automatic gain amplifying circuit 103, and filter out base band using filter circuit 109 and believe
Base band out of band signal in number, excludes the interference signal outside radar Cochannel interference device investigative range, and synchronous signal processing is single
Member 101 automatically adjusts the gain amplifier of automatic gain amplifying circuit 103 according to the received echo-signal of receiving antenna 106, avoids
Co-channel interference signal causes the energy of channel base band signal to block, and guarantees that channel base band signal does not occur the phenomenon that signal saturation,
Then the frequency for changing the radiofrequency signal that signal generation unit 102 generates at random by signal processing unit 101 avoids dry with frequency
It disturbs and causes long lasting effect, the digital signal that signal processing unit 101 again converts A/D acquisition module 120 carries out data processing, leads to
It crosses method for tracking target and filters out co-channel interference signal, to solve the problem of co-channel interference between radar.
It is and above-mentioned the embodiment of the invention also provides a kind of radar Cochannel interference device based on same inventive concept
Embodiment is identical or the explanation of corresponding structure and term details are not described herein, refering to what is shown in Fig. 2, the embodiment of the present invention provides
Radar Cochannel interference device include: filter circuit 109, automatic gain amplifying circuit 103 and signal processing unit 101, filter
Wave circuit 109 is used to reduce the difference power of high frequency section and low frequency part in baseband signal and filters out in the baseband signal
Base band out of band signal；Automatic gain amplifying circuit 103 is for amplifying baseband signal；Signal processing unit 101 is used for basis and connects
Receive the gain amplifier of the received echo-signal of antenna 106 automatic adjustment automatic gain amplifying circuit 103, the random signal that changes generates
The frequency for the radiofrequency signal that unit 102 generates, and co-channel interference signal is filtered out by method for tracking target；Signal processing unit
101 are electrically connected with filter circuit 106 and automatic gain amplifying circuit 103 respectively.
Optionally, filter circuit 109 includes: high-pass filtering circuit and low-pass filter circuit, and high-pass filtering circuit is for subtracting
The difference power of high frequency section and low frequency part in small baseband signal；Low-pass filter circuit is for filtering out in the baseband signal
Base band out of band signal.
Optionally, radar Cochannel interference device provided in an embodiment of the present invention further include: transmitting antenna 105, the first function
Rate amplifier 104, signal generation unit 102, receiving antenna 106, the second power amplifier 107, frequency mixer 108 and A/D acquisition
Circuit 120；Signal generation unit 102 is electrically connected with signal processing module 101, under the control of signal processing module 101
Periodically generate radiofrequency signal；First power amplifier 104 is electrically connected with signal generation unit 102, is produced for amplified signal
The radiofrequency signal that raw unit 102 generates；Transmitting antenna 105 is electrically connected with the first power amplifier 104, passes through first for emitting
The amplified radiofrequency signal of power amplifier 104；Receiving antenna 106 is used for receives echo-signal；Second power amplifier 107 with
Receiving antenna 106 is electrically connected, the echo-signal received for amplifying receiving antenna 106；Frequency mixer 108 respectively with the second power
Amplifier 107 and filter circuit 109 are electrically connected, for being converted to the amplified echo-signal of the second power amplifier 107
Baseband signal, and by base band signal transmission to filter circuit 109；A/D acquisition module 120 respectively with automatic gain amplifying circuit
103 and signal processing unit 101 be electrically connected, for will be through the baseband signal after 103 gain amplifier of automatic gain amplifying circuit
Digital signal is converted to, and is sent to signal processing unit 101.
Radar Cochannel interference device provided by the embodiment of the present invention can work in millimeter wave band, be suitable for millimeter wave
Radar, the advantage that millimeter wave has penetrating fog, cigarette, dust ability strong, radar Cochannel interference dress provided in an embodiment of the present invention
Setting can also work in its all band, it is not limited here.
Radar Cochannel interference device provided by the embodiment of the present invention can be performed provided by any embodiment of the invention
Radar Cochannel interference method has the corresponding functional module of execution method and beneficial effect.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. a kind of radar Cochannel interference method characterized by comprising
Step S1, filter circuit reduces the difference power of high frequency section and low frequency part in baseband signal and filters out the base band
Base band out of band signal in signal；
Step S2, signal processing unit putting according to the received echo-signal automatic adjustment automatic gain amplifying circuit of receiving antenna
Large gain；
Step S3, signal processing unit changes the frequency of the radiofrequency signal of signal generation unit generation at random；
Step S4, signal processing unit filters out co-channel interference signal by method for tracking target.
2. radar Cochannel interference method according to claim 1, which is characterized in that the filter circuit reduces base band letter
The difference power of high frequency section and low frequency part in number and filter out base band out of band signal in the baseband signal, comprising:
Step S11, high-pass filtering circuit reduces the difference power of high frequency section and low frequency part in baseband signal；
Step S12, low-pass filter circuit filters out the base band out of band signal in the baseband signal；
The filter circuit includes high-pass filtering circuit and low-pass filter circuit.
3. radar Cochannel interference method according to claim 1, which is characterized in that the signal processing unit is according to connecing
Receive the gain amplifier of the received echo-signal automatic adjustment automatic gain amplifying circuit of antenna, comprising:
Step S21, after radar powers on, the gain amplifier of automatic gain amplifying circuit is set preset value by signal processing unit
Aavg；
Step S22, signal processing unit control signal generation unit periodically generates radiofrequency signal, and obtains receiving antenna and connect
The maximum echo power level P of the echo-signal of receiptsmax；
Step S23, signal processing unit calculates default echo power level PavgWith the maximum echo power level PmaxDifference
Value P, P=Pavg-Pmax；
Step S24, signal processing unit passes through formulaGain amplifier multiple A is calculated, and passes through formula Anew=Aavg×A
Calculate amplifying circuit gain Anew；
Step S25, the gain amplifier of signal processing unit setting automatic gain amplifying circuit is Anew；
Step S26, step S22 to step S25 is repeated.
4. radar Cochannel interference method according to claim 1, which is characterized in that the signal processing unit changes at random
Varying signal generates the frequency for the radiofrequency signal that unit generates, comprising:
Step S31, it is f that signal processing unit, which controls the frequency of the radiofrequency signal in the initial period of the signal generation unit,0；
Step S32, a positive number m less than 1 is randomly generated in signal processing unit, by m multiplied by radar maximum BREATHABLE BANDWIDTH Δ
Bmax, obtain the frequency shift value Δ f of the radiofrequency signal in the signal generation unit next period0=m × Δ Bmax；
Step S33, it is f that signal processing unit, which controls the frequency for the radiofrequency signal that the signal generation unit generated in the next period,
=f0+Δf0；
Step S36, step S32 and step S33 is repeated.
5. radar Cochannel interference method according to claim 4, which is characterized in that the signal processing unit produces at random
A raw positive number m less than 1, comprising:
Signal processing unit generates a random number x by rand () function in C language；
X divided by the largest random number RAND_MAX of rand () function, is obtained a positive number m less than 1 by signal processing unit.
6. radar Cochannel interference method according to claim 1, which is characterized in that the signal processing unit passes through mesh
Mark tracking filters out co-channel interference signal and includes:
Step S41, signal processing unit filters out the interference signal outside goal-selling speed interval；
Step S42, signal processing unit filters out the interference signal outside radar surveying angular range and outside radar surveying distance range；
Step S43, signal processing unit is according to the received first echo signal of two neighboring period receiving antenna and the second echo
Signal determines actual signal and interference signal；
Step S44, signal processing unit filters out co-channel interference signal according to formula x (k+1)=x (k)+Tv (k)；
Wherein, x (k+1) indicates current goal position, and x (k) indicated the target position in a upper period, and T indicates the letter of the radar
Number process cycle, v (k) indicated the speed of the target in a upper period.
7. radar Cochannel interference method according to claim 6, which is characterized in that signal processing unit is according to adjacent two
The received first echo signal of a period receiving antenna and second echo signal determines actual signal and interference signal includes:
Signal processing unit by the received first echo signal of receiving antenna in the two neighboring period and second echo signal away from
Deviation value is confirmed as actual signal less than the signal of the second preset value less than the first preset value and relative velocity difference；Otherwise,
It is confirmed as interference signal.
8. a kind of radar Cochannel interference device characterized by comprising
Filter circuit, for reducing the difference power of high frequency section and low frequency part in baseband signal and filtering out the base band letter
Base band out of band signal in number；
Automatic gain amplifying circuit, for amplifying baseband signal；
Signal processing unit, for the amplification according to the received echo-signal automatic adjustment automatic gain amplifying circuit of receiving antenna
Gain, the random frequency for changing the radiofrequency signal that signal generation unit generates, and filtered out by method for tracking target with frequently dry
Disturb signal；
The signal processing unit is electrically connected with the filter circuit and the automatic gain amplifying circuit respectively.
9. radar Cochannel interference device according to claim 8, which is characterized in that the filter circuit includes:
High-pass filtering circuit, for reducing the difference power of high frequency section and low frequency part in baseband signal；
Low-pass filter circuit, for filtering out the base band out of band signal in the baseband signal.
10. radar Cochannel interference device according to claim 8, which is characterized in that further include: transmitting antenna, first
Power amplifier, signal generation unit, receiving antenna, the second power amplifier, frequency mixer and A/D Acquisition Circuit；
The signal generation unit is electrically connected with the signal processing module, for the control next week in the signal processing module
The generation radiofrequency signal of phase property；
First power amplifier is electrically connected with the signal generation unit, for amplifying the signal generation unit generation
The radiofrequency signal；
The transmitting antenna is electrically connected with first power amplifier, is amplified for emitting by first power amplifier
Radiofrequency signal afterwards；
The receiving antenna is used for receives echo-signal；
Second power amplifier is electrically connected with the receiving antenna, the echo letter received for amplifying the receiving antenna
Number；
The frequency mixer is electrically connected with second power amplifier and the filter circuit respectively, is used for second function
The amplified echo-signal of rate amplifier is converted to baseband signal, and by the base band signal transmission to the filter circuit；
The A/D acquisition module is electrically connected with the automatic gain amplifying circuit and signal processing unit respectively, for will be through
The baseband signal after the automatic gain amplifying circuit gain amplifier is converted to digital signal, and is sent at the signal
Manage unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910028300.3A CN109738872A (en) | 2019-01-11 | 2019-01-11 | A kind of radar Cochannel interference method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910028300.3A CN109738872A (en) | 2019-01-11 | 2019-01-11 | A kind of radar Cochannel interference method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109738872A true CN109738872A (en) | 2019-05-10 |
Family
ID=66364555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910028300.3A Pending CN109738872A (en) | 2019-01-11 | 2019-01-11 | A kind of radar Cochannel interference method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109738872A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111988047A (en) * | 2020-08-20 | 2020-11-24 | 北京航天广通科技有限公司分公司 | Zero intermediate frequency radio frequency front end circuit and zero intermediate frequency radio frequency front end component |
| WO2021052262A1 (en) * | 2019-09-20 | 2021-03-25 | 华为技术有限公司 | Information reporting method and device, and information reception method and device |
| WO2021068522A1 (en) * | 2019-10-11 | 2021-04-15 | 华为技术有限公司 | Transmission control method and related device |
| WO2021104457A1 (en) * | 2019-11-28 | 2021-06-03 | 华为技术有限公司 | Interference signal parameter estimation method and detection device |
| CN113504512A (en) * | 2021-09-13 | 2021-10-15 | 成都雷通科技有限公司 | Active unmanned supervision miniaturized security radar in ISM frequency band |
| CN114167399A (en) * | 2022-02-15 | 2022-03-11 | 中国人民解放军火箭军工程大学 | Range radar system based on same-frequency sensing and opportunistic transmission and implementation method |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101089653A (en) * | 2007-07-20 | 2007-12-19 | 西安理工大学 | Short-range frequency-modulation continuous wave FMCW radar anti-interference method |
| CN101207403A (en) * | 2007-12-19 | 2008-06-25 | 哈尔滨工程大学 | Broadband radio frequency front end of intermediate wave frequency band high dynamic range |
| CN101335546A (en) * | 2007-06-26 | 2008-12-31 | 中兴通讯股份有限公司 | Radio frequency auto-gain control system and method |
| CN102420621A (en) * | 2011-11-16 | 2012-04-18 | 北京华力创通科技股份有限公司 | Method and device for suppressing out-of-band interference of digital signals |
| CN102707266A (en) * | 2012-05-24 | 2012-10-03 | 北京理工大学 | Radar with anti-interference and multi-target identification functions and detection method thereof |
| CN103048650A (en) * | 2012-12-31 | 2013-04-17 | 清华大学 | Method and system for simulating echo based on stepping frequency radar |
| CN104639190A (en) * | 2014-12-19 | 2015-05-20 | 大唐半导体设计有限公司 | Analog front-end system of frequency modulation receiver and processing method thereof |
| CN205229451U (en) * | 2015-11-24 | 2016-05-11 | 大连楼兰科技股份有限公司 | Modulate circuit based on car anticollision millimeter wave radar intermediate frequency signal |
| CN107167797A (en) * | 2017-05-04 | 2017-09-15 | 安徽超远信息技术有限公司 | A kind of Digital railway hump measure speed radar and its anti-disturbance method |
| CN206977401U (en) * | 2017-06-28 | 2018-02-06 | 南京理工大学紫金学院 | Ultra-broadband signal for indoor moving terminal positioning receives high-frequency electronic system |
| CN108225482A (en) * | 2016-12-15 | 2018-06-29 | 重庆川仪自动化股份有限公司 | Suitable for the gain-adaptive adjusting method and system of guided wave radar |
-
2019
- 2019-01-11 CN CN201910028300.3A patent/CN109738872A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101335546A (en) * | 2007-06-26 | 2008-12-31 | 中兴通讯股份有限公司 | Radio frequency auto-gain control system and method |
| CN101089653A (en) * | 2007-07-20 | 2007-12-19 | 西安理工大学 | Short-range frequency-modulation continuous wave FMCW radar anti-interference method |
| CN101207403A (en) * | 2007-12-19 | 2008-06-25 | 哈尔滨工程大学 | Broadband radio frequency front end of intermediate wave frequency band high dynamic range |
| CN102420621A (en) * | 2011-11-16 | 2012-04-18 | 北京华力创通科技股份有限公司 | Method and device for suppressing out-of-band interference of digital signals |
| CN102707266A (en) * | 2012-05-24 | 2012-10-03 | 北京理工大学 | Radar with anti-interference and multi-target identification functions and detection method thereof |
| CN103048650A (en) * | 2012-12-31 | 2013-04-17 | 清华大学 | Method and system for simulating echo based on stepping frequency radar |
| CN104639190A (en) * | 2014-12-19 | 2015-05-20 | 大唐半导体设计有限公司 | Analog front-end system of frequency modulation receiver and processing method thereof |
| CN205229451U (en) * | 2015-11-24 | 2016-05-11 | 大连楼兰科技股份有限公司 | Modulate circuit based on car anticollision millimeter wave radar intermediate frequency signal |
| CN108225482A (en) * | 2016-12-15 | 2018-06-29 | 重庆川仪自动化股份有限公司 | Suitable for the gain-adaptive adjusting method and system of guided wave radar |
| CN107167797A (en) * | 2017-05-04 | 2017-09-15 | 安徽超远信息技术有限公司 | A kind of Digital railway hump measure speed radar and its anti-disturbance method |
| CN206977401U (en) * | 2017-06-28 | 2018-02-06 | 南京理工大学紫金学院 | Ultra-broadband signal for indoor moving terminal positioning receives high-frequency electronic system |
Non-Patent Citations (2)
| Title |
|---|
| 李辉;宋耀良;杨余旺;: "宽带混沌信号在汽车防撞雷达中的应用", 现代雷达, no. 11, pages 56 * |
| 郇浩;陶然;李元硕;王越;王桂英;: "基于变换域和时域联合处理的雷达同频干扰抑制方法", 电子与信息学报, no. 12, pages 2978 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021052262A1 (en) * | 2019-09-20 | 2021-03-25 | 华为技术有限公司 | Information reporting method and device, and information reception method and device |
| CN112630767A (en) * | 2019-09-20 | 2021-04-09 | 华为技术有限公司 | Method and device for reporting and receiving information |
| WO2021068522A1 (en) * | 2019-10-11 | 2021-04-15 | 华为技术有限公司 | Transmission control method and related device |
| WO2021104457A1 (en) * | 2019-11-28 | 2021-06-03 | 华为技术有限公司 | Interference signal parameter estimation method and detection device |
| CN111988047A (en) * | 2020-08-20 | 2020-11-24 | 北京航天广通科技有限公司分公司 | Zero intermediate frequency radio frequency front end circuit and zero intermediate frequency radio frequency front end component |
| CN111988047B (en) * | 2020-08-20 | 2022-06-14 | 北京航天广通科技有限公司分公司 | Zero intermediate frequency radio frequency front end circuit and zero intermediate frequency radio frequency front end component |
| CN113504512A (en) * | 2021-09-13 | 2021-10-15 | 成都雷通科技有限公司 | Active unmanned supervision miniaturized security radar in ISM frequency band |
| CN114167399A (en) * | 2022-02-15 | 2022-03-11 | 中国人民解放军火箭军工程大学 | Range radar system based on same-frequency sensing and opportunistic transmission and implementation method |
| CN114167399B (en) * | 2022-02-15 | 2022-05-10 | 中国人民解放军火箭军工程大学 | Ranging radar system based on same-frequency sensing and opportunistic transmission and implementation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109738872A (en) | A kind of radar Cochannel interference method and device | |
| AU2010209277B2 (en) | Low energy radar system | |
| JP4994023B2 (en) | Pulse radar, automotive radar and landing assist radar | |
| Malanowski et al. | Extending the integration time in DVB-T-based passive radar | |
| Chauhan | A platform for false data injection in frequency modulated continuous wave radar | |
| JPWO2006120823A1 (en) | Radar | |
| JP6994371B2 (en) | Radar device | |
| CN104914429B (en) | Target indication radar system capable of adaptively selecting waveform according to target distance | |
| Umehira et al. | A novel iterative inter-radar interference reduction scheme for densely deployed automotive FMCW radars | |
| CN112764036A (en) | Adaptive multi-mode vehicle-mounted radar system and design method | |
| CN107144825A (en) | A kind of imparametrization DTV external illuminators-based radar Doppler's diffusion compensation method | |
| CN109031232B (en) | Adaptive masking coefficient height line clutter suppression method | |
| CN112154350B (en) | Signal processing method, system, vehicle and storage medium of millimeter wave radar | |
| JP2006242818A (en) | Fm-cm radar device and noise suppressing method for the same | |
| CN109669165B (en) | Multi-base radar transmitter and waveform joint selection optimization method based on radio frequency stealth | |
| Li et al. | An adaptive interference cancellation method for automotive FMCW radar based on waveform optimization | |
| JP3580270B2 (en) | Target classification device and radar device having the same | |
| US20080024358A1 (en) | Radar system | |
| CN113759359B (en) | Passive bistatic radar receiving device based on empty pipe radar and target detection method | |
| CN112363124B (en) | Power-based simulation radar target simulation method | |
| JPH05223919A (en) | Signal processor | |
| CN114966567A (en) | DRFM-based seeker DBS mode deception jamming method and system | |
| JPH09502271A (en) | Radar equipment | |
| SE522506C2 (en) | Towing transmitters and ways to improve one | |
| JP5150113B2 (en) | Radar equipment |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190510 |
|
| RJ01 | Rejection of invention patent application after publication |