CN104199000A - Cloud and rain clutter and banded interference eliminating method for multi-sensor detection area - Google Patents
Cloud and rain clutter and banded interference eliminating method for multi-sensor detection area Download PDFInfo
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- CN104199000A CN104199000A CN201410480202.0A CN201410480202A CN104199000A CN 104199000 A CN104199000 A CN 104199000A CN 201410480202 A CN201410480202 A CN 201410480202A CN 104199000 A CN104199000 A CN 104199000A
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- CN
- China
- Prior art keywords
- clutter
- evolution
- weight matrix
- weights
- sexual intercourse
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Classifications
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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
- G01S7/35—Details of non-pulse systems
- G01S7/352—Receivers
- G01S7/354—Extracting wanted echo-signals
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
Abstract
The invention discloses a cloud and rain clutter and banded interference eliminating method for a multi-sensor detection area and belongs to environmental clutter elimination pre-treatment in the field of radar data processing. The cloud and rain clutter and banded interference eliminating method is an issue in the field of radar data processing, existing methods generally focus on the level of signals and this kind of clutters cannot be completely suppressed in practice. The cloud and rain clutter and banded interference eliminating method includes setting up a weight matrix and an evolved weight matrix within a measuring area according to the characteristics of the clutters, enlarging area characteristics of measuring points of the clutters, effectively determining the area positions of the clutters and accurately eliminating the clutters of the area. The algorithm process is visual and simple, instantaneity is guaranteed in engineering application, and the cloud and rain cutter and banded interference eliminating method has popularization and application value.
Description
Technical field
The present invention relates to the environment clutter elimination method in radar data process field, be applicable to the various clutter pretreatment systems in information fusion system.
Background technology
In the time there is sexual intercourse weather in sensor lift-off work or search coverage, can face powerful sexual intercourse clutter, especially, when target is during in sexual intercourse clutter district, sensor detection performance can be had a strong impact on.In data processing aspect, sexual intercourse clutter shows as the very high gauge point of density in certain area, can in multiple search coverages, exist, thereby form many false track, is unfavorable for the formation of object space entirety situation.For addressing this problem, expert has also proposed a lot of methods both at home and abroad, but is all the disposal route that rests on signal aspect, for example, adopt reducing attached lobe clutter amplitude, improving the methods such as signal to noise ratio.But these methods can not well suppress sexual intercourse clutter and banded interference in practice completely, still need to, at radar data processing layer in the face of this two classes clutter suppresses and rejects, could meet the requirement of practical implementation.
Summary of the invention
1. the technical matters that will solve
The object of the present invention is to provide a kind of elimination method that can disturb in the face of sexual intercourse clutter and band shape at radar data processing layer.The method, according to the characteristic of this type of clutter, by build weight matrix and evolution weight matrix in measurement region, is amplified the region characteristic of clutter gauge point, can effectively determine clutter regional location, accurately this region clutter is rejected.In addition, the method belongs to clutter pre-service, and algorithmic procedure is intuitively easy, in engineering application, can ensure good real-time.
2. technical scheme
Sexual intercourse clutter and the banded elimination method disturbing in a kind of multi-sensor detection of the present invention region, because the elimination method of sexual intercourse clutter is basic identical with the banded elimination method disturbing, here taking the elimination method of sexual intercourse clutter as example, comprise following technical measures: first, by the Transformed Measurement of each sensor under fusion center coordinate system, get the value of all measurements, determine that a rectangle measures region; Then, rectangle is measured to region and need to carry out piecemeal by task, and calculate after piecemeal the number of gauge point in each little rectangular area, determine weight matrix and evolution weight matrix; Finally, by the expectation value comparison of each element in evolution weight matrix and weighting, determine whether the measurement in little rectangular area is sexual intercourse clutter and rejects.
3. beneficial effect
(1) the method can effectively be determined sexual intercourse clutter or banded clutter point position of disturbing in measurement region, and the clutter of rejecting exactly sexual intercourse clutter and banded interference measures;
(2) the method simple flow, calculated amount little, be easy to realize, can ensure good real-time.
Brief description of the drawings
Figure of description 1 is the process flow diagram that sexual intercourse clutter of the present invention is rejected;
Figure of description 2 is to measure area schematic;
Figure of description 3 is to measure area dividing matrix schematic diagram.
Embodiment
Below in conjunction with Figure of description, the present invention is described in further detail.With reference to Figure of description, sexual intercourse clutter of the present invention and the banded rejecting process of disturbing are divided following step:
The rejecting step of sexual intercourse clutter:
(1) calculation element 1 receives the measurement of each sensor, and all Transformed Measurements, under fusion center coordinate system, are obtained to all measurement Z (k).
(2) calculation element 2 receives the Output rusults from calculation element 1, and obtains the set of x, y direction measurement maximal value and minimum value by search
based on E
xy(k) build rectangle A as shown in Figure 2.And in memory storage 3, open up storage space, temporary E
xy(k).
(3) Output rusults of calculation element 4 receiving/storing devices 3, is divided into multiple fritter rectangles according to Fig. 3 by A, utilizes rectangle B definition to measure matrix of areas to be
R
e(k)＝{a
ij(k)}i＝1,2,…,L
x(k)；j＝1,2,…L
y(k) (1)
In formula, L
xand L (k)
y(k) be respectively the number of rectangle B pocket in x, y direction, its value depends on real tracker and mission requirements.
(4) calculation element 5 receives the Output rusults of calculation element 1 and calculation element 4, based on a
ij(k) number measuring in is determined weights, and the weight matrix of definition B is
W
e(k)＝{w
ij(k)}i＝1,2,…,L
x(k)；j＝1,2,…L
y(k) (2)
In formula, w
ij(k) initial value is zero.Z (k) is carried out in the process of cycling, whenever there being a measurement to fall into a
ij(k), in, carry out w
ij(k)=w
ij(k)+1.
(5) calculation element 6 receives the Output rusults of calculation element 5, for ease of distinguishing sexual intercourse clutter and common clutter, at this by the level of confidentiality characteristic of the further sexual intercourse clutter of evolution weight matrix.Definition a
ij(k) evolution weights
for w
ijand a (k)
ij(k) the weights sum of adjacent area,
Therefore, the evolution weight matrix of B is
(6) calculation element 7 receives the Output rusults of calculation element 6, calculates average evolution weights.Defining average evolution weights is herein
In formula,
for the number of the non-vanishing pocket of evolution weights.
(7) calculation element 8 receives the Output rusults of calculation element 6 and calculation element 7, will
with weighting
compare.Because the level of confidentiality degree of sexual intercourse clutter is far above other targets and clutter, if therefore
Retain the measurement in aij (k), otherwise by a
ij(k) measurement in is rejected as sexual intercourse clutter.Wherein b is for rejecting coefficient, under normal circumstances
for evolution weights maximal value), concrete value is relevant with targeted environment.It should be noted that in the time there is formation target in targeted environment at this, weed out for avoiding that the measurement of forming into columns is used as to sexual intercourse clutter, the value of b should be relatively large.
The banded rejecting step of disturbing:
The expression mode disturbing due to band shape is the fan-shaped measurement close quarters centered by sensor, and therefore concrete deleting madel is similar to sexual intercourse clutter deleting madel, does not repeat them here, but should be noted that following 3 points at this:
(1) the banded rejecting process of disturbing completes under the local coordinate system of each sensor;
(2) banded disturb in deleting madel, search coverage is divided into multiple very narrow fan-shaped;
(3) disturb in deleting madel in band shape, search coverage weight matrix and being based upon in polar coordinates of evolution weight matrix complete.
Claims (3)
1. sexual intercourse clutter and the banded elimination method that disturbs in multi-sensor detection region, is characterized in that comprising following technical measures:
(1) set up the weight matrix and the evolution weight matrix that measure region;
(2) on average evolve weights calculating and reject coefficient determine.
2. foundation according to claim 1 measures weight matrix and the evolution weight matrix in region, it is characterized in that adopting following technical measures step: obtain the set of x, y direction measurement maximal value and minimum value by search
based on E
xy(k) build rectangle A, and A is divided into multiple fritter rectangles measurement region B, it is R that definition measures region B
e(k)={ a
ij(k) } i=1,2 ..., L
x(k); J=1,2 ... L
y(k); And then based on a
ij(k) number measuring in is determined weights, and the weight matrix that definition measures region B is
W
e(k)＝{w
ij(k)}i＝1,2,…,L
x(k)；j＝1,2,…L
y(k)
For ease of distinguishing sexual intercourse clutter and common clutter, at this by the level of confidentiality characteristic of the further sexual intercourse clutter of evolution weight matrix; Definition a
ij(k) evolution weights
for w
ijand a (k)
ij(k) the weights sum of adjacent area,
Therefore, the evolution weight matrix of B is
。
3. determining of the calculating of average evolution weights according to claim 1 and rejecting coefficient, is characterized in that adopting following technical measures step: calculate average evolution weights
In formula,
for the number of the non-vanishing pocket of evolution weights; Will
with weighting
compare, if
Retain a
ij(k) measurement in, otherwise by a
ij(k) measurement in is rejected as sexual intercourse clutter;
B is for rejecting coefficient, under normal circumstances
for evolution weights maximal value), concrete value is relevant with targeted environment; It should be noted that in the time there is formation target in targeted environment at this, weed out for avoiding that the measurement of forming into columns is used as to sexual intercourse clutter, the value of b should be relatively large.
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| CN201410480202.0A CN104199000B (en) | 2014-09-18 | 2014-09-18 | Sexual intercourse clutter and banding interference elimination method in a kind of multi-sensor detection region |
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|---|---|---|---|
| CN201410480202.0A CN104199000B (en) | 2014-09-18 | 2014-09-18 | Sexual intercourse clutter and banding interference elimination method in a kind of multi-sensor detection region |
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Citations (3)
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|---|---|---|---|---|
| FR2833356A1 (en) * | 2001-11-12 | 2003-06-13 | Telstra Corp Ltd | Surface wave radar system for use in coastal area, has data processing system to process data representing receive signals to mitigate ionospheric clutter |
| CN101865995A (en) * | 2010-05-05 | 2010-10-20 | 南京莱斯信息技术股份有限公司 | Processing method of airport radar signals |
| CN103364764A (en) * | 2013-06-25 | 2013-10-23 | 西安电子科技大学 | Airborne radar non-stationary clutter suppression method |
-
2014
- 2014-09-18 CN CN201410480202.0A patent/CN104199000B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2833356A1 (en) * | 2001-11-12 | 2003-06-13 | Telstra Corp Ltd | Surface wave radar system for use in coastal area, has data processing system to process data representing receive signals to mitigate ionospheric clutter |
| CN101865995A (en) * | 2010-05-05 | 2010-10-20 | 南京莱斯信息技术股份有限公司 | Processing method of airport radar signals |
| CN103364764A (en) * | 2013-06-25 | 2013-10-23 | 西安电子科技大学 | Airborne radar non-stationary clutter suppression method |
Non-Patent Citations (2)
| Title |
|---|
| NAN XIE ET AL.: "《A Multiple-Model Prediction Approach》", 《IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING》 * |
| 董维科: "《天空起伏背景中红外弱小目标检测新方法研究》", 《中国博士学位论文全文数据库 信息科技辑》 * |
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Inventor after: Wang Haipeng Inventor after: Xiong Wei Inventor after: Wang Cong Inventor after: Pan Xinlong Inventor after: Liu Yu Inventor after: Xu Congan Inventor after: Xia Shutao Inventor after: Wang Ziling Inventor before: Xiong Wei Inventor before: Wang Cong Inventor before: Wang Haipeng Inventor before: Shu Congan Inventor before: Liu Yu Inventor before: Xia Shutao Inventor before: Wang Ziling Inventor before: Pan Xinlong |
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