CN105277925B - The method for obtaining ground clutter spectrum center position in Doppler filter group - Google Patents
The method for obtaining ground clutter spectrum center position in Doppler filter group Download PDFInfo
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- CN105277925B CN105277925B CN201510633308.4A CN201510633308A CN105277925B CN 105277925 B CN105277925 B CN 105277925B CN 201510633308 A CN201510633308 A CN 201510633308A CN 105277925 B CN105277925 B CN 105277925B
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- ground clutter
- filter
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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
- G01S7/28—Details of pulse systems
- G01S7/285—Receivers
- G01S7/292—Extracting wanted echo-signals
-
- 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
- G01S7/021—Auxiliary means for detecting or identifying radar signals or the like, e.g. radar jamming signals
-
- 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
- G01S7/35—Details of non-pulse systems
- G01S7/352—Receivers
- G01S7/354—Extracting wanted echo-signals
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The method for obtaining ground clutter spectrum center position in Doppler filter group, belong to ground bounce removal field, the technical issues of solution, is: obtaining the filter that ground clutter spectrum center is generally according to the movement velocity of radar carrier, have technical point that S1. obtains the movement velocity of radar carrier, i.e. relative radial rate of the ground clutter with respect to radar carrier；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, the spectrum centre frequency of ground clutter 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, estimates the filter that ground clutter spectrum center is generally in this.Beneficial effect is: obtaining the filter that ground clutter spectrum center is generally in.
Description
Technical field
The invention belongs to ground bounce removal fields, are related to one kind and obtain ground clutter spectrum center in Doppler filter group
The method of position.
Background technique
In intelligent transportation field, vehicle-mounted velocity radar can be fluidly 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 discovery adjacent lane
Other vehicles are close and when judging that it has an impact the lane change doubling of this vehicle, system can issue 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 moves certain frequency, specific position 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.
Summary of the invention
In order to solve the above-mentioned technical problem, a kind of according to the movement velocity of radar carrier acquisition atural object the present invention is directed to obtain
The filter that clutter spectrum center is generally in.
To achieve the goals above, the technical scheme is that
A method of ground clutter spectrum center position in Doppler filter group is obtained, is included 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, estimates what ground clutter spectrum center was generally in this
Filter.
The utility model has the advantages that 1. present invention can be found in ground clutter spectrum for the motion carrier radar with friction speed
The filter that the heart is generally in.
Detailed description of the invention
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 in 5kHz frequency range 16 bandpass filters in embodiment 3
Frequency characteristic curve.
Specific embodiment
For apparent elaboration the invention, the present invention is further described in conjunction with the embodiments.
Embodiment 1: a method of ground clutter spectrum center position in Doppler filter group being obtained, including such as
Lower step:
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, estimates what ground clutter spectrum center was generally in this
Filter.
Embodiment 2: identical as the technical solution of embodiment 1, moving-target detection (moving target detection) is
A kind of Doppler process, its essence is input collected two-dimentional (the fast time dimension and slow time dimension) data matrix of radar
In the Doppler filter group being made of to one N number of bandpass filter, by analyzing data and processing in different filters,
The clutter in certain frequency range can be filtered out.As shown, it is made of for 5kHz frequency range is interior 16 bandpass filters
Doppler filter group amplitude-versus-frequency curve, it can be seen that each filter occupies certain frequency bandwidth, center frequency
Rate is respectivelyWherein k=0,1 ..., 15 respectively indicates No. 0 to No. 15 filter.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art within the technical scope of the 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 method for obtaining ground clutter spectrum center position in Doppler filter group, which is characterized in that including
Following steps:
S1. radar is installed on carrier, and due to carrier movement, atural object has radial velocity relative to radar as stationary object, 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 ground 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, estimates the filtering that ground clutter spectrum center is generally in this
Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510633308.4A CN105277925B (en) | 2015-09-29 | 2015-09-29 | The method for obtaining ground clutter spectrum center position in Doppler filter group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510633308.4A CN105277925B (en) | 2015-09-29 | 2015-09-29 | The method for obtaining ground clutter spectrum center position in Doppler filter group |
Publications (2)
| Publication Number | Publication Date |
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| CN105277925A CN105277925A (en) | 2016-01-27 |
| CN105277925B true CN105277925B (en) | 2019-03-12 |
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| CN201510633308.4A Active CN105277925B (en) | 2015-09-29 | 2015-09-29 | The method for obtaining ground clutter spectrum center position in Doppler filter group |
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Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3243606A1 (en) * | 1982-11-25 | 1984-05-30 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Arrangement for radar signal processing in a Pulse-Doppler radar |
| 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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2015
- 2015-09-29 CN CN201510633308.4A patent/CN105277925B/en active Active
Non-Patent Citations (1)
| Title |
|---|
| 星载SAR多普勒中心实时估计技术研究;王绍清;《中国优秀硕士学位论文全文数据库 信息科技辑》;20060415(第4期);I136-191 |
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| CN105277925A (en) | 2016-01-27 |
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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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