CN105182301B - The ground bounce removal method of motion carrier velocity radar - Google Patents
The ground bounce removal method of motion carrier velocity radar Download PDFInfo
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- CN105182301B CN105182301B CN201510634180.3A CN201510634180A CN105182301B CN 105182301 B CN105182301 B CN 105182301B CN 201510634180 A CN201510634180 A CN 201510634180A CN 105182301 B CN105182301 B CN 105182301B
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- clutter
- radar
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- frequency
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/36—Means for anti-jamming, e.g. ECCM, i.e. electronic counter-counter measures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/91—Radar or analogous systems specially adapted for specific applications for traffic control
- G01S13/92—Radar or analogous systems specially adapted for specific applications for traffic control for velocity measurement
Abstract
The technical issues of ground bounce removal method of motion carrier velocity radar, belongs to ground bounce removal field, solution be：So that the motion carrier radar with friction speed carries out ground clutter inhibition processing, technical essential is：If estimating clutter spectrum center to be located in the frequency range shared by kth filter, then assert that the range of ground clutter spectrum includes frequency range shared by present filter, or it occupies including bandwidth shared by its front and back filter, to distinguish ground clutter and the moving-target of other speed on frequency domain, achieve the purpose that clutter recognition.Advantageous effect：1. the present invention can be directed to the inhibition processing that the motion carrier radar with friction speed carries out ground clutter, system signal to noise ratio is improved；Advantageous effect is：It can be directed to the inhibition processing that the motion carrier radar with friction speed carries out ground clutter, improve system signal to noise ratio.
Description
Technical field
The invention belongs to ground bounce removal fields, are related to a kind of ground bounce removal method of motion carrier velocity radar.
Background technology
In intelligent transportation field, vehicle-mounted velocity radar can fluidly be monitored road vehicle, once hair
The now illegal activities such as hypervelocity can be prevented in time to avoid traffic accident occurs.
In field of automotive active safety, lane change auxiliary system preferably applies velocity radar, once find adjacent lane
Other vehicles are close and when judging that it has an impact the lane change doubling of this vehicle, system can send out sound-light alarm with prompt driver this
There are risks by Shi Biandao.
Due to carrier movement, the stationary objects such as atural object have radial velocity relative to radar, i.e., ground clutter spectrum at this time
Position on spectrogram is changed, and nearby certain frequency, specific position are moved by original zero-frequency or zero-frequency
It sets and is determined by the movement velocity of radar carrier.And at this point, for static or pole low-speed motion clutter traditional MTI cancellation techniques
And it is not suitable for, it is necessary to be done according to position of the clutter on frequency spectrum and be targetedly filtered.
Invention content
In order to solve the above-mentioned technical problem, it is intended that the motion carrier radar with friction speed carries out atural object
Clutter recognition processing, and improve system signal to noise ratio.
To achieve the goals above, the technical scheme is that：
A kind of ground bounce removal method of motion carrier velocity radar, includes the following steps：
S1. the movement velocity of radar carrier, i.e. relative radial rate of the ground clutter with respect to radar carrier are obtained；
S2. the Doppler frequency of ground clutter, i.e. the spectrum centre frequency of clutter are obtained according to the above radial velocity；
S3. ground clutter spectrum centre frequency is compared with each centre frequency of filter group, by ground clutter
Spectrum centre frequency is compared with the centre frequency of all filters respectively, if the difference of the two is less than the half of filter bandwidht
When, then the centre frequency of ground clutter is located in the filter at this time；
If S4. estimating clutter spectrum center to be located in the frequency range shared by kth filter, the ground clutter is assert
The range of spectrum includes frequency range shared by present filter, or is occupied including bandwidth shared by its front and back filter, in frequency
Ground clutter and the moving-target of other speed are distinguished on domain, achieve the purpose that clutter recognition.
Advantageous effect：1. the present invention can be directed to the inhibition that the motion carrier radar with friction speed carries out ground clutter
Processing improves system signal to noise ratio；
2. the present invention realizes that simply the slow time dimension N points FFT transform that data block may be used realizes the filter of N number of filter
Wave process.
Description of the drawings
Fig. 1 is the flow diagram of method in the embodiment of the present invention 1；
Fig. 2 is the width for the Doppler filter group being made of 16 bandpass filters in 5kHz frequency ranges in embodiment 2
Frequency characteristic curve.
Specific implementation mode
For apparent elaboration the invention, the present invention is further described in conjunction with the embodiments.
Embodiment 1：A kind of ground bounce removal method of motion carrier velocity radar, includes the following steps：
S1. the movement velocity of radar carrier, i.e. relative radial rate of the ground clutter with respect to radar carrier are obtained；
S2. the Doppler frequency of ground clutter, i.e. the spectrum centre frequency of clutter are obtained according to the above radial velocity；
S3. ground clutter spectrum centre frequency is compared with each centre frequency of filter group, by ground clutter
Spectrum centre frequency is compared with the centre frequency of all filters respectively, if the difference of the two is less than the half of filter bandwidht
When, then the centre frequency of ground clutter is located in the filter at this time；Estimate what ground clutter spectrum center was generally in this
Filter；
If S4. estimating clutter spectrum center to be located in the frequency range shared by kth filter, the ground clutter is assert
The range of spectrum includes frequency range shared by present filter, or is occupied including bandwidth shared by its front and back filter, in frequency
Ground clutter and the moving-target of other speed are distinguished on domain, achieve the purpose that clutter recognition.
Embodiment 2：
Identical as the technical solution of embodiment 1, it is a kind of how general that moving-target, which detects (moving target detection),
Strangle processing method, its essence is by collected two-dimentional (the fast time dimension and slow time dimension) data matrix of radar be input to one by
In the Doppler filter group of N number of bandpass filter composition, by analyzing data and processing in different filters, it can filter out
Clutter in certain frequency range.As shown, it is the interior Doppler being made of 16 bandpass filters of 5kHz frequency ranges
The amplitude-versus-frequency curve of filter group, it can be seen that each filter occupies certain frequency bandwidth, and centre frequency is respectivelyWherein k=0,1 ..., 15 indicates No. 0 to No. 15 filter respectively.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope of present disclosure, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (1)
1. a kind of ground bounce removal method of motion carrier velocity radar, which is characterized in that include the following steps：
S1. radar is installed on carrier, and due to carrier movement, atural object has radial velocity as stationary object relative to radar, obtains
The movement velocity of the carrier of radar, i.e. relative radial rate of the ground clutter with respect to radar carrier must be installed；
S2. the Doppler frequency of ground clutter, i.e. the spectrum centre frequency of clutter are obtained according to the above radial velocity；
S3. ground clutter spectrum centre frequency is compared with each centre frequency of filter group, it will be in the spectrum of ground clutter
Frequency of heart is compared with the centre frequency of all filters respectively, if the difference of the two is less than the half of filter bandwidht,
Then the centre frequency of ground clutter is located in the filter at this time；
If S4. estimating clutter spectrum center to be located in the frequency range shared by kth filter, ground clutter spectrum is assert
Range includes frequency range shared by present filter, or is occupied including bandwidth shared by its front and back filter, on frequency domain
Ground clutter and the moving-target of other speed are distinguished, achieve the purpose that clutter recognition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510634180.3A CN105182301B (en) | 2015-09-29 | 2015-09-29 | The ground bounce removal method of motion carrier velocity radar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510634180.3A CN105182301B (en) | 2015-09-29 | 2015-09-29 | The ground bounce removal method of motion carrier velocity radar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105182301A CN105182301A (en) | 2015-12-23 |
| CN105182301B true CN105182301B (en) | 2018-08-10 |
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| CN201510634180.3A Active CN105182301B (en) | 2015-09-29 | 2015-09-29 | The ground bounce removal method of motion carrier velocity radar |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2018154710A1 (en) * | 2017-02-24 | 2018-08-30 | 三菱電機株式会社 | Radar signal processing device and radar system |
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| CN102854496B (en) * | 2012-09-19 | 2013-10-02 | 中国民航大学 | Airborne meteorological radar ground clutter suppression method based on double threshold control |
| CN103036520A (en) * | 2012-12-05 | 2013-04-10 | 天津光电通信技术有限公司 | Short wave gating filter |
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Effective date of registration: 20160128 Address after: 116023 Dalian province high tech park, Hui Park, No. 7, take off the garden of the 2 phase of the 11 floor of the Applicant after: Dalian Loulan Technology Co., Ltd. Address before: 116023 Dalian province high tech park, Hui Park, No. 7, take off the garden of the 2 phase of the 11 floor of the Applicant before: XI'AN ZHIJI ANTENNA TECHNOLOGY CO., LTD. |
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