CN106054119B - A kind of interference pointing method based on azimuth deviation - Google Patents
A kind of interference pointing method based on azimuth deviation Download PDFInfo
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- CN106054119B CN106054119B CN201610324280.0A CN201610324280A CN106054119B CN 106054119 B CN106054119 B CN 106054119B CN 201610324280 A CN201610324280 A CN 201610324280A CN 106054119 B CN106054119 B CN 106054119B
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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
- G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
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Abstract
The present invention relates to a kind of interference pointing method based on azimuth deviation, belongs to array radar signal processing technology field.It is completed by four steps, and hardware includes DSP digital signal processing chips, and software includes Visual DSP++ softwares；Increase azimuth deviation value to the noise amplitudes data that DSP is read in read in, and the possibility orientation of interference is preferentially worth to using azimuth deviation, again whether higher than interference threshold value the specific orientation of interference is determined by noise amplitudes, clearly it can differentiate and distinguish and be separated by the smaller two or more interference of angle, it is easy to operate, while the specific direction of interference can be indicated with dotted line on radar terminal interface.It solves the existing method for choosing the maximum direction modulus value of interference and measures interference angle, clearly it cannot differentiate and distinguish and be separated by the smaller multiple interference of angle, the specific direction that interference can not be indicated on radar terminal interface, the problem of influencing radar surveying jamming bearing angle precision.
Description
Technical field
The present invention relates to a kind of interference pointing method based on azimuth deviation belongs to array radar signal treatment technology neck
Domain.
Background technology
Azimuth deviation is widely used in the radar with measurement angle function.When radar such as uses at the Beam Expansions angle measurement, thunder
Left and right wave beam up to transmitting has certain deviation, azimuth deviation value, that is, true bearing and left and right wave beam relative to actual orientation
Between difference, therefore on the direction of left and right wave beam increase azimuth deviation value, you can obtain actual orientation.It generally adopts at present
Interference angle is measured with the method for choosing interference signal amplitude modulus value maximum direction, chooses interference signal amplitude modulus value maximum direction
Method it is more accurate in the larger interference of adjacent angular between distinguishing interference signal, but the adjacent angular between distinguishing interference signal
When smaller interference, then the interference radiating way of multiple interference cannot be indicated completely.
Invention content
It is an object of the present invention in view of the above shortcomings of the prior art, provide a kind of easy to operate, can indicate completely more
The interference radiating way of a interference distinguishes the smaller two or more interference of adjacent angular, and uses dotted line on radar terminal interface
Indicate the interference pointing method based on azimuth deviation in the specific direction of interference.
The present invention is to realize above-mentioned purpose by the following technical solutions：
A kind of interference pointing method based on azimuth deviation, hardware include DSP digital signal processing chips, hereinafter referred to as
DSP, software include Visual DSP++ softwares；The method that the interference based on azimuth deviation is directed toward, it is by walking as follows
Suddenly it completes：Step 1, data are read in；The width of 360 ° of radar mechanical scanning is sent to DSP by FPGA programmable logic controller (PLC)s
Angle value and azimuth deviation value, the data that radar mechanical scanning one is enclosed are divided into 4096 sampled points, and each sampled point is 360/
4096 degree.The range value of each sampled point and azimuth deviation value are transferred to DSP by FPGA, wherein the range value of each sampled point is
Its orientation Amplitude maxima；
Step 2, effective interference sample point is screened in calculating machine orientation；Calculate the mechanical azimuthal of each sampled point, i-th
The mechanical azimuthal of sampled point is i/4096*360 degree；Judge whether the sampled point is effective by the threshold value in transmission data, door
Limit value is that 0 i.e. sampled point is invalid, and threshold value is that 1 sampled point is effective；It filters out effective interference sample point and stores；
Step 3, true bearing is calculated by azimuth deviation；The true bearing of the sampled point selected is calculated, sampled point
True bearing=mechanical azimuthal+azimuth deviation value；
Step 4, interference angular interval is divided；The mechanical azimuthal size of two more adjacent sampled points, if the two difference
More than interference great Qu angle threshold values, then two sampled points are divided into two different interference angular intervals, otherwise, by two
Sampled point is divided in the same interference angular interval；
Step 5, interference angle subinterval is determined；In the big section of each interference angle, by each sampled point with it is previous
The true bearing of sampled point, the average true bearing in the big section of interference angle compare, if difference is all not more than interference sub-district
Angle threshold, then it is assumed that the sampled point belongs to same interference angle subinterval, and otherwise, which belongs to new interference angle sub-district
Between；
The method that the interference based on azimuth deviation is directed toward, it is also completed as follows：
Step 1, abnormal value elimination point；The excessive or too small point of angle is weeded out in each sampled point；If sampled point
Real angle and the difference of area's average angle are more than singular value thresholding, then remove this sampled point from this angular range section；
Step 2 rejects the too small interference range in angular range section；When interference sub-district width maximum angle point and minimum angle
The angular range for spending the mechanical azimuthal difference of point is less than interference width threshold value, then it is assumed that this range intervals is not effective disturber
Position, does not agglomerate this jamming bearing；
Step 3 agglomerates jamming bearing；Using the average real angle for the interference angle range intervals selected as the interference
Orientation angles, interfere maximum modulus value of the interference modulus value as the interference in angle range intervals；
Step 4 merges jamming bearing；The jamming bearing that multiple interference angles are sufficiently close to is merged；It is dry with one
Centered on disturbing orientation, all jamming bearings in positive and negative orientation fusion thresholding this angular interval are merged, are taken wherein dry
The maximum point of modulus value is disturbed as the jamming bearing and interference modulus value after fusion；
The interference pointing method based on azimuth deviation increases azimuth deviation value to the noise amplitudes data that dsp chip is read in
Mark；Including：
Interference magnitude thresholding flag bit, for confirming whether sampled point interference magnitude can be considered as interference；
Great Qu angle threshold flag bits are interfered, the substantially subregion range for confirming interference；
Interfere sub-district angle threshold flag, for judge former and later two adjacent sampled points orientation values difference whether mistake
Greatly, confirm sampled point whether in the same specific interference angular regions；
The unusual thresholding flag bit of jamming bearing, it is excessive compared with mean value for rejecting angle in same specific interference angular regions
Sampled point；
Width threshold flag bit is interfered, for judging it is long whether a specific interference angle zone length meets interference angle
Spend range；
Mechanical azimuthal, the position of the sampled point of radar scanning one week, the angle each put successively increase；
Azimuth deviation, the mechanical azimuthal of sampled point and the difference of true bearing；
Interference magnitude, the interference magnitude size of sampled point；
Orientation merges thresholding, and multiple similar interference radiating way permeate an interference radiating way.
The method that a kind of interference based on azimuth deviation is directed toward, it is characterised in that：Preferentially by azimuth deviation with
The region for substantially determining interference angle, the specific angle of interference is determined in conjunction with interference magnitude value flag bit；It realizes accurate
Judge jamming bearing, and there is good separating capacity for the closer multiple interference of distance.
The advantageous effect of the present invention compared with prior art is：
The interference pointing method based on azimuth deviation increases azimuth deviation by the noise amplitudes data read in DSP
Value, and is preferentially worth to the possibility orientation of interference using azimuth deviation, then by noise amplitudes whether higher than interference threshold value come
The specific orientation for determining interference, clearly can differentiate and distinguish the smaller two or more interference of adjacent angular, easy to operate, and
The specific direction of interference is indicated on radar terminal interface with dotted line.The precision for measuring jamming bearing angle is improved, and to dry
Disturb the measurement in orientation both adaptively can provide suitable angle measurement threshold value by the comparison of main and side road, also can be by monitoring interface
Parameter is changed to control each angle measurement threshold value, the more existing method for measuring interference angle is more flexible.It has well solved existing
The method that some chooses interference signal amplitude modulus value maximum direction measures interference angle, cannot clearly indicate adjacent between interference signal
The two or more interference smaller with adjacent angular is distinguished of the direction of the larger interference of angle, and cannot achieve in radar terminal circle
The specific direction for indicating interference on face with dotted line, the problem of seriously affecting radar surveying jamming bearing angle precision.
Description of the drawings
Fig. 1 is a kind of flow chart of the interference pointing method based on azimuth deviation；
Fig. 2 is the amplitude figure of one group of actual ghosts；
Fig. 3 is the amplitude and magnitude threshold value figure of one group of actual ghosts；
Fig. 4 is azimuth deviation, amplitude and the threshold value figure of one group of actual ghosts；
Fig. 5 is one group of actual interference orientation and should be based on pair for interfering the jamming bearing obtained by pointing method of azimuth deviation
Than figure；
Fig. 6, Fig. 7 are a kind of emulation experiment oscillogram of the interference pointing method based on azimuth deviation.
Specific implementation mode
To this, the embodiment of the interference pointing method based on azimuth deviation is described in further detail below in conjunction with the accompanying drawings
（Referring to Fig. 1~Fig. 7）：
A kind of interference pointing method based on azimuth deviation, hardware include DSP digital signal processing chips, hereinafter referred to as
DSP, software include Visual DSP++ softwares；The method that the interference based on azimuth deviation is directed toward, it is by walking as follows
Suddenly it completes：Step 1, data are read in；The width of 360 ° of radar mechanical scanning is sent to DSP by FPGA programmable logic controller (PLC)s
Angle value and azimuth deviation value, the data that radar mechanical scanning one is enclosed are divided into 4096 sampled points, and each sampled point is 360/
4096 degree.The range value of each sampled point and azimuth deviation value are transferred to DSP by FPGA, wherein the range value of each sampled point is
Its orientation Amplitude maxima；
Step 2, effective interference sample point is screened in calculating machine orientation；Calculate the mechanical azimuthal of each sampled point, i-th
The mechanical azimuthal of sampled point is i/4096*360 degree；Judge whether the sampled point is effective by the threshold value in transmission data, door
Limit value is that 0 i.e. sampled point is invalid, and threshold value is that 1 sampled point is effective；It filters out effective interference sample point and stores；（After screening
Interference angular amplitude referring to Fig. 3）；
Step 3, true bearing is calculated by azimuth deviation；The true bearing of the sampled point selected is calculated, sampled point
True bearing=mechanical azimuthal+azimuth deviation value；（Wherein azimuth deviation value is referring to Fig. 5）；
Step 4, interference angular interval is divided；The mechanical azimuthal size of two more adjacent sampled points, if the two difference
More than interference great Qu angle threshold values, then two sampled points are divided into two different interference angular intervals, otherwise, by two
Sampled point is divided in the same interference angular interval；（Due to the limited storage space of ts201 models DSP, at most only divide
24 interference angular intervals）；
Step 5, interference angle subinterval is determined；In the big section of each interference angle, by each sampled point with it is previous
The true bearing of sampled point, the average true bearing in the big section of interference angle compare, if difference is all not more than interference sub-district
Angle threshold, then it is assumed that the sampled point belongs to same interference angle subinterval, and otherwise, which belongs to new interference angle sub-district
Between；（It is each that angle subinterval is interfered to store up to 120 sampled points, an interference angle in view of the memory space of ts201
Big section at most divides 24 interference angle subintervals）；
The method that the interference based on azimuth deviation is directed toward, it is also completed as follows：
Step 1, abnormal value elimination point；The excessive or too small point of angle is weeded out in each sampled point；If sampled point
Real angle and the difference of area's average angle are more than singular value thresholding, then remove this sampled point from this angular range section；
Step 2 rejects the too small interference range in angular range section；When interference sub-district width maximum angle point and minimum angle
The angular range for spending the mechanical azimuthal difference of point is less than interference width threshold value, then it is assumed that this range intervals is not effective disturber
Position, does not agglomerate this jamming bearing；
Step 3 agglomerates jamming bearing；Using the average real angle for the interference angle range intervals selected as the interference
Orientation angles, interfere maximum modulus value of the interference modulus value as the interference in angle range intervals；
Step 4 merges jamming bearing；The jamming bearing that multiple interference angles are sufficiently close to is merged；It is dry with one
Centered on disturbing orientation, all jamming bearings in positive and negative orientation fusion thresholding this angular interval are merged, are taken wherein dry
The maximum point of modulus value is disturbed as the jamming bearing and interference modulus value after fusion；
The interference pointing method based on azimuth deviation increases azimuth deviation value to the noise amplitudes data that dsp chip is read in
Mark；Including：
Interference magnitude thresholding flag bit, for confirming whether sampled point interference magnitude can be considered as interference；
Great Qu angle threshold flag bits are interfered, the substantially subregion range for confirming interference；
Interfere sub-district angle threshold flag, for judge former and later two adjacent sampled points orientation values difference whether mistake
Greatly, confirm sampled point whether in the same specific interference angular regions；
The unusual thresholding flag bit of jamming bearing, it is excessive compared with mean value for rejecting angle in same specific interference angular regions
Sampled point；
Width threshold flag bit is interfered, for judging it is long whether a specific interference angle zone length meets interference angle
Spend range；
Mechanical azimuthal, the position of the sampled point of radar scanning one week, the angle each put successively increase；
Azimuth deviation, the mechanical azimuthal of sampled point and the difference of true bearing；
Interference magnitude, the interference magnitude size of sampled point；
Orientation merges thresholding, and multiple similar interference radiating way permeate an interference radiating way.
The method that a kind of interference based on azimuth deviation is directed toward, it is characterised in that：Preferentially by azimuth deviation with
The region for substantially determining interference angle, the specific angle of interference is determined in conjunction with interference magnitude value flag bit；It realizes accurate
Judge jamming bearing, and there is good separating capacity for the closer multiple interference of distance（Referring to Fig. 1~7）.
The model TS201 of the DSP digital signal processing chips.
A kind of implementation result of method that the interference based on azimuth deviation is directed toward can be by following emulation experiment furtherly
It is bright：
1. simulated conditions：
The emulation experiment of the present invention is in 7 systems of Interl (R) Xeon (R) CPU 3.07GHz 48GB memories Windows
Under, the emulation experiment completed on Matlab r2010a operation platforms.Emulation experiment data be sent to DSP by FPGA it is true
The amplitude threshold of echo data, interference is 5000, and interference subregion minimum angles are 4.5 degree, and least interference width is 2.5 degree,
The interference threshold factor is 1.5 degree, and singular value thresholding is 1.5 degree；The map of magnitudes of interference is referring to Fig. 2.
2. the simulation experiment result and analysis：
（According to Fig. 6, Fig. 7）, occur 4 sections and 6 for crossing interference modulus value thresholding altogether in 270 °~360 ° orientation
The smooth zero crossing of the azimuth deviation of a minizone；I.e. there are one independent disturbers in the place of each azimuth deviation zero crossing
Position.Therefore, in 300 °~340 ° this big interference sections, 3 independent jamming bearings are shared, if not using the present invention
Method, and judge that the method in orientation can not differentiate this 3 independent interference radiating way by the maximum modulus value of the prior art.
Final jamming bearing result such as following table：
It is consistent with the orientation that Fig. 7 is stated.
In conclusion the present invention can effectively improve the resolution ratio for differentiating interference angle.
The above is presently preferred embodiments of the present invention, and the example above illustrates that the substantive content not to the present invention is made
Limitation in any form, technology of the person of an ordinary skill in the technical field after having read this specification according to the present invention
Essence is to any simple modification or deformation made by the above specific implementation mode, and the technology contents possibly also with the disclosure above
The equivalent embodiment for being changed or being modified to equivalent variations, in the range of still falling within technical solution of the present invention, without departing from
The spirit and scope of the invention.
Claims (2)
1. a kind of interference pointing method based on azimuth deviation, hardware includes DSP digital signal processing chips, hereinafter referred to as DSP,
Software includes Visual DSP++ softwares；The method that the interference based on azimuth deviation is directed toward, it is complete as follows
At：Step 1, data are read in；The range value of 360 ° of radar mechanical scanning is sent to DSP by FPGA programmable logic controller (PLC)s
With azimuth deviation value, the data that radar mechanical scanning one is enclosed are divided into 4096 sampled points, and each sampled point is 360/4096 degree；
The range value of each sampled point and azimuth deviation value are transferred to DSP by FPGA, wherein the range value of each sampled point is it
Orientation Amplitude maxima；
Step 2, effective interference sample point is screened in calculating machine orientation；Calculate the mechanical azimuthal of each sampled point, ith sample
The mechanical azimuthal of point is i/4096*360 degree；Judge whether the sampled point is effective by the threshold value in transmission data, threshold value
Invalid for 0 i.e. sampled point, threshold value is that 1 sampled point is effective；It filters out effective interference sample point and stores；
Step 3, true bearing is calculated by azimuth deviation；Calculate the true bearing of sampled point selected, sampled point it is true
Orientation=mechanical azimuthal+azimuth deviation value；
Step 4, interference angular interval is divided；The mechanical azimuthal size of two more adjacent sampled points, if the two difference is more than
Great Qu angle threshold values are interfered, then two sampled points are divided into two different interference angular intervals, otherwise, two are sampled
Point is divided in the same interference angular interval；
Step 5, interference angle subinterval is determined；In the big section of each interference angle, by each sampled point and previous sampling
True bearing, the average true bearing in the big section of interference angle of point compare, if difference is all not more than interference sub-district angle
Thresholding, then it is assumed that the sampled point belongs to same interference angle subinterval, and otherwise, which belongs to new interference angle subinterval；
It is characterized in that：The method that the interference based on azimuth deviation is directed toward, it is also completed as follows：
Step 1, abnormal value elimination point；The excessive or too small point of angle is weeded out in each sampled point；If sampled point is true
The difference of angle and area's average angle is more than singular value thresholding, then removes this sampled point from this angular range section；
Step 2 rejects the too small interference range in angular range section；When interference sub-district width maximum angle point and minimum angles point
Mechanical azimuthal difference angular range be less than interference width threshold value, then it is assumed that this range intervals is not effective jamming bearing,
This jamming bearing is not agglomerated；
Step 3 agglomerates jamming bearing；Using the average real angle for the interference angle range intervals selected as the side of the interference
Parallactic angle degree interferes modulus value of the maximum interference modulus value as the interference in angle range intervals；
Step 4 merges jamming bearing；The jamming bearing that multiple interference angles are sufficiently close to is merged；With a disturber
Centered on position, all jamming bearings in positive and negative orientation fusion thresholding this angular interval are merged, takes and wherein interferes mould
It is worth maximum point as the jamming bearing and interference modulus value after fusion；
The interference pointing method based on azimuth deviation increases azimuth deviation value mark to the noise amplitudes data that dsp chip is read in
Will；Including：
Interference magnitude thresholding flag bit, for confirming whether sampled point interference magnitude can be considered as interference；
Great Qu angle threshold flag bits are interfered, the substantially subregion range for confirming interference；
Sub-district angle threshold flag is interfered, whether the difference for judging the orientation values of former and later two adjacent sampled points is excessive, really
Whether sampled point is recognized in the same specific interference angular regions；
The unusual thresholding flag bit of jamming bearing, for rejecting the sampling that angle is excessive compared with mean value in same specific interference angular regions
Point；
Width threshold flag bit is interfered, for judging whether a specific interference angle zone length meets interference angular length model
It encloses；
Mechanical azimuthal, the position of the sampled point of radar scanning one week, the angle each put successively increase；
Azimuth deviation, the mechanical azimuthal of sampled point and the difference of true bearing；
Interference magnitude, the interference magnitude size of sampled point；
Orientation merges thresholding, and multiple similar interference radiating way permeate an interference radiating way.
2. the method that a kind of interference based on azimuth deviation according to claim 1 is directed toward, it is characterised in that：Preferentially pass through
Azimuth deviation determines the specific angle of interference in conjunction with interference magnitude value flag bit substantially to determine the region of interference angle
Degree；It realizes and accurately judges jamming bearing, and there is good separating capacity for the closer multiple interference of distance.
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| US8970355B1 (en) * | 2012-05-17 | 2015-03-03 | HE Boeing Company | Methods and systems for use in indicating directions finding systems |
| CN104407318A (en) * | 2014-11-20 | 2015-03-11 | 中国船舶重工集团公司第七〇五研究所 | Precise orientating method for ultra-short baseline of 48-element uniform cylindrical array |
| CN104820213A (en) * | 2015-04-28 | 2015-08-05 | 电子科技大学 | Dynamic elimination-based search and tracking radar directional pattern estimation method |
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| US20150103164A1 (en) * | 2013-10-14 | 2015-04-16 | Narrative AB | Lifelogging device, lifelogging system and method of controlling a wearable lifelogging device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8970355B1 (en) * | 2012-05-17 | 2015-03-03 | HE Boeing Company | Methods and systems for use in indicating directions finding systems |
| CN104407318A (en) * | 2014-11-20 | 2015-03-11 | 中国船舶重工集团公司第七〇五研究所 | Precise orientating method for ultra-short baseline of 48-element uniform cylindrical array |
| CN104820213A (en) * | 2015-04-28 | 2015-08-05 | 电子科技大学 | Dynamic elimination-based search and tracking radar directional pattern estimation method |
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