CN105116385A - Method and device for generating FDA radar transmission signals and FDA radar - Google Patents
Method and device for generating FDA radar transmission signals and FDA radar Download PDFInfo
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- CN105116385A CN105116385A CN201510586736.6A CN201510586736A CN105116385A CN 105116385 A CN105116385 A CN 105116385A CN 201510586736 A CN201510586736 A CN 201510586736A CN 105116385 A CN105116385 A CN 105116385A
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- array element
- frequency
- emission signal
- increment
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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
- G01S7/282—Transmitters
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- Radar Systems Or Details Thereof (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
Abstract
The invention discloses a method and a device for generating FDA radar transmission signals and an FDA radar. The FDA radar comprises a plurality of array elements arranged in a line. The method comprises the steps of setting a reference frequency and a frequency increment; adopting the reference frequency as a transmission signal frequency for an array element positioned right in the middle of the line; according to the reference frequency and the frequency increment, figuring out a transmission signal frequency for each array element positioned on the left of the above array element right in the middle of the line in the linear increasing manner; according to the reference frequency and the frequency increment, figuring out a transmission signal frequency for each array element positioned on the right of the above array element right in the middle of the line in the linear increasing manner; according to the transmission signal frequencies, generating transmission signals at corresponding array elements, and overlaying the signals to obtain FDA radar transmission signals.
Description
Technical field
The present invention relates to FDA Radar Technology field, particularly relate to a kind of method, device and the FDA radar that produce FDA radar emission signal.
Background technology
Frequency diversity array radar (FDA, FrequencyDiverseRadar) is applied with different difference on the frequencies to transmitting in different array element at one time, that is: each array element centre frequency of signal of launching is not identical.These signals launched spatially superpose mutually, FDA radar beam can be made spatially to present on some distance angle position and strengthen, the characteristic that other distance angle positions are weakened.
The arrangement mode of the array element of FDA radar can be by multiple array element arrangement point-blank, that is: arrange in linear array mode.
The emission signal frequency of first array element being positioned at one end, when generation transmits, is set as reference frequency f by existing FDA radar linear array
0, be f from the emission signal frequency of this array element successively the n-th array element to the right or left
0+ n Δ f, Δ f represents difference on the frequency, and Δ f is usually much smaller than f
0.The FDA radar obtained thus transmit beam pattern as shown in Figure 1, as can be seen from Figure 1, the position (red area in Fig. 1) that existing FDA radar emission signal beam is strengthened is in banded, the wave beam that transmits of this pattern determines FDA radar and there will be interdependent property when judging the Distance geometry angle of target, that is: if do not know that distance size is just unable to estimate out the size of angle, equally, do not know that the size of angle is also unable to estimate out the size of distance.Therefore, existing FDA radar also needs additional a set of special method to solve the sex chromosome mosaicism that interdepends of Distance geometry angle.
Summary of the invention
The object of the present invention is to provide a kind of method, device and the FDA radar that produce FDA radar emission signal, to solve the complementary problem of above-mentioned Distance geometry angle existed in prior art.
An embodiment provides a kind of method producing FDA radar emission signal, FDA radar comprises multiple arrangement array element point-blank, and the method comprises: setting reference frequency and frequency increment; Using reference frequency as the emission signal frequency of array element being positioned at position, middle; According to reference frequency and frequency increment, obtain the emission signal frequency of each array element of turning left from the array element being positioned at position, middle according to the mode of linear increment; According to reference frequency and frequency increment, obtain the emission signal frequency of each array element of turning right from the array element being positioned at position, middle according to the mode of linear increment; Produce in corresponding array element according to emission signal frequency and transmit and obtain FDA radar emission signal after superposing.
An alternative embodiment of the invention provides a kind of device producing FDA radar emission signal, and FDA radar comprises multiple arrangement array element point-blank, also comprises: setting module, for setting reference frequency and frequency increment; Central authorities' array element emission signal frequency generation module, for using reference frequency as the emission signal frequency of array element being positioned at position, middle; Left array element emission signal frequency generation module, for according to reference frequency and frequency increment, obtains the emission signal frequency of each array element of turning left from the array element being positioned at position, middle according to the mode of linear increment; Right array element emission signal frequency generation module, for according to reference frequency and frequency increment, obtains the emission signal frequency of each array element of turning right from the array element being positioned at position, middle according to the mode of linear increment; And signal produces and laminating module, transmit for producing in corresponding array element according to emission signal frequency and obtain FDA radar emission signal after superposing.
Bright another embodiment of this law provides a kind of FDA radar, and comprise multiple arrangement array element point-blank, in array element, the emission signal frequency being positioned at the array element of position, middle equals the reference frequency preset; The frequency transmitted of each array element of turning left from the array element being positioned at position, middle increases progressively according to the frequency increment preset successively on reference frequency basis; The frequency transmitted of each array element of turning right from the array element being positioned at position, middle increases progressively according to the frequency increment preset successively on reference frequency basis.
Accompanying drawing explanation
By reading hereafter detailed description of the preferred embodiment, various other advantage and benefit will become cheer and bright for those of ordinary skill in the art.Accompanying drawing only for illustrating the object of preferred implementation, and does not think limitation of the present invention.And in whole accompanying drawing, represent identical parts by identical reference symbol.Wherein in the accompanying drawings, the multiple identical parts of alphabetic flag instruction after reference number, when making a general reference these parts, by its last alphabetic flag of omission.In the accompanying drawings:
Fig. 1 is the launching beam schematic diagram that existing FDA radar produces;
Fig. 2 is the process flow diagram of an embodiment of the method for generation FDA radar emission signal of the present invention;
Fig. 3 is the schematic block diagram of a device embodiment of generation FDA radar emission signal of the present invention;
Fig. 4 is the schematic diagram of an embodiment of FDA radar of the present invention;
Fig. 5 is the schematic diagram of another embodiment of FDA radar of the present invention;
Fig. 6 is the FDA radar emission signal beam figure that technical solution of the present invention produces.
In the accompanying drawings, use same or similar label to refer to same or similar element.
Embodiment
Illustrative embodiments of the present invention is described in detail referring now to accompanying drawing.The embodiment that to should be appreciated that shown in accompanying drawing and describe is only exemplary, is intended to explain principle of the present invention and spirit, and not limits the scope of the invention.
Usually, FDA radar can include multiple arrangement array element point-blank, and the spacing between array element can be equal.
With reference to the process flow diagram of an embodiment 200 of the method for figure 2, Fig. 2 to be Fig. 2 be generation FDA radar emission signal of the present invention.Embodiment 200 shown in Fig. 2 can comprise following steps 201 to 205.
In step 201.Setting reference frequency and frequency increment.
Usually, reference frequency f
0can much larger than frequency increment Δ f.Such as, if reference frequency is set to f
0=10GHz, then can be set to Δ f=5kHz by frequency increment.
In step 202., using reference frequency as the emission signal frequency of array element being positioned at position, middle.
In one embodiment of the invention, if the array element in FDA radar adds up to odd number (can be expressed as 2M+1, M is positive integer), then the array element being positioned at position, middle only has one, and this array element is individual toward the M+1 of mediant from any one end of linear array.Therefore, the centre frequency transmitted of this M+1 array element can be set to reference frequency f
0.Such as: when array element add up to 13 time, the array element being positioned at position, middle is from any one end of linear array toward the 7th array element of mediant, then the centre frequency transmitted of the 7th array element can be set to reference frequency f
0.
In another embodiment of the present invention, if the array element in FDA radar adds up to even number (can be expressed as 2N, N is positive integer), the array element being then positioned at position, middle can have two, and these two array elements are the N number of and N+1 from the high order end of linear array toward mediant respectively.Such as, when array element add up to 10 time, the array element being positioned at position, middle is the 5th array element from any high order end of linear array toward mediant and the 6th array element, then the centre frequency transmitted of these two array elements all can be set to reference frequency f
0.
In step 203, according to reference frequency and frequency increment, obtain the emission signal frequency of each array element of turning left from the array element being positioned at position, middle according to the mode of linear increment.
In one embodiment of the invention, if the array element in FDA radar adds up to odd number (can be expressed as 2M+1, M is positive integer), and these linear arrays are from left to right numbered from 1 to 2M+1 successively, then each array element that the array element (M+1 array element) being positioned at position, middle is turned left be successively M, M-1 ..., the 1st.The frequency transmitted in these array elements can set gradually as f according to the mode of linear increment
0+ Δ f, f
0+ 2 Δ f ..., f
0+ M Δ f.
In one embodiment of the invention, if the array element in FDA radar adds up to even number (can be expressed as 2N, N is positive integer), and these linear arrays are from left to right numbered from 1 to 2N successively, then each array element that the array element (N number of array element) being positioned at position, middle is turned left be successively N-1, N-2 ..., the 1st.The frequency transmitted in these array elements can set gradually as f according to the mode of linear increment
0+ Δ f, f
0+ 2 Δ f ..., f
0+ (N-1) Δ f.
In step 204, according to reference frequency and frequency increment, obtain the emission signal frequency of each array element of turning right from the array element being positioned at position, middle according to the mode of linear increment.
In one embodiment of the invention, if the array element in FDA radar adds up to odd number (can be expressed as 2M+1, M is positive integer), and these linear arrays are from left to right numbered from 1 to 2M+1 successively, then each array element that the array element (M+1 array element) being positioned at position, middle is turned right be successively M+2, M+3 ..., 2M+1.The frequency transmitted in these array elements can set gradually as f according to the mode of linear increment
0+ Δ f, f
0+ 2 Δ f ..., f
0+ M Δ f.
In one embodiment of the invention, if the array element in FDA radar adds up to even number (can be expressed as 2N, N is positive integer), and these linear arrays are from left to right numbered from 1 to 2N successively, then each array element that the array element (N+1 array element) being positioned at position, middle is turned right be successively N+2, N+3 ..., 2N.The frequency transmitted in these array elements can set gradually as f according to the mode of linear increment
0+ Δ f, f
0+ 2 Δ f ..., f
0+ (N-1) Δ f.
In step 205, produce in corresponding array element according to emission signal frequency and transmit and obtain FDA radar emission signal after superposing.
In one embodiment of the invention, the centre frequency that transmit of step 202 to 204 each array element obtained can be applied in corresponding array element, and produce the formula of signal according to FDA radar array element and produce in each array element and transmit accordingly.These superpositions mutually that transmit just can obtain FDA radar emission signal later.
To the method for the generation FDA radar emission signal that described herein according to the embodiment of the present invention.
Can find out with reference to figure 6 comparison diagram 1, the FDA radar emission signal that the method for generation FDA radar emission signal that the present invention proposes produces, there is good point-type beam pattern, there is scan characteristic of better fixing a point compared with existing signal beam, therefore, it is possible to remove distance dependence of angle, improve the estimated accuracy of location.In addition, when the inventive method being applied to the FDA radar disposed, its hardware can not be changed, only needing to upgrade to corresponding software section.
Similar with the method, present invention also offers the corresponding device producing FDA radar emission signal.
Figure 3 shows that the schematic block diagram of a device embodiment 300 of generation FDA radar emission signal of the present invention.FDA radar can comprise multiple arrangement array element point-blank, and the spacing between these array elements can be thought.
As shown in Figure 3, device 300 can comprise: setting module 301, for setting reference frequency and frequency increment; Central authorities' array element emission signal frequency generation module 302, for using reference frequency as the emission signal frequency of array element being positioned at position, middle; Left array element emission signal frequency generation module 303, for according to reference frequency and frequency increment, obtains the emission signal frequency of each array element of turning left from the array element being positioned at position, middle according to the mode of linear increment; Right array element emission signal frequency generation module 304, for according to reference frequency and frequency increment, obtains the emission signal frequency of each array element of turning right from the array element being positioned at position, middle according to the mode of linear increment; And signal produces and laminating module 305, transmit for producing in corresponding array element according to emission signal frequency and obtain FDA radar emission signal after superposing.
To the device of the generation FDA radar emission signal that described herein according to the embodiment of the present invention.
Can find out with reference to figure 6 comparison diagram 1, the FDA radar emission signal that the device of generation FDA radar emission signal that the present invention proposes produces, there is good point-type beam pattern, there is scan characteristic of better fixing a point compared with existing signal beam, therefore, it is possible to remove distance dependence of angle, improve the estimated accuracy of location.In addition, when apparatus of the present invention being applied to the FDA radar disposed, its hardware can not be changed, only needing to upgrade to corresponding software section.
Present invention also offers a kind of FDA radar.
It is the schematic diagram of an embodiment 400 of FDA radar of the present invention with reference to figure 4, Fig. 4.In the embodiment shown in fig. 4, FDA radar 400 can comprise odd number arrangement array element A point-blank
1, A
2..., A
m-1, A
m, A
m+1, A
m+2, A
m+3..., A
2M+1, the spacing between these array elements can be equal.
In these array elements, be positioned at the array element A of position, middle
m+1emission signal frequency can equal the reference frequency f that presets
0.
From the array element A being positioned at position, middle
m+1the frequency transmitted of each array element of turning left can successively at reference frequency f
0basis increases progressively according to the frequency increment Δ f preset.That is: M array element A
mthe centre frequency transmitted can equal f
0+ Δ f, M-1 array element A
m-1the centre frequency transmitted can equal f
0+ 2 Δ f, the 1st array element A
1the centre frequency transmitted can equal f
0+ M Δ f.
The frequency transmitted of each array element of turning right from the array element being positioned at position, middle can successively at reference frequency f
0basis on increase progressively according to the frequency increment Δ f preset.That is: M+2 array element A
m+2the centre frequency transmitted can equal f
0+ Δ f, M+3 array element A
m+3the centre frequency transmitted can equal f
0+ 2 Δ f, 2M+1 array element A
2M+1the centre frequency transmitted can equal f
0+ M Δ f.
It is the schematic diagram of another embodiment 500 of FDA radar of the present invention with reference to figure 5, Fig. 5.In the embodiment shown in fig. 5, FDA radar 500 can comprise even number arrangement array element A point-blank
1, A
2..., A
n-2, A
n-1, A
n, A
n+1, A
n+2, A
n+3..., A
2N, the spacing between these array elements can be equal.
In these array elements, be positioned at two array element A of position, middle
nand A
n+1emission signal frequency can equal the reference frequency f that presets
0.
From the array element A being positioned at position, middle
nthe frequency transmitted of each array element of turning left can successively at reference frequency f
0basis on increase progressively according to the frequency increment Δ f preset.That is: N-1 array element A
n-1the centre frequency transmitted can equal f
0+ Δ f, N-2 array element A
n-2the centre frequency transmitted can equal f
0+ 2 Δ f, the 1st array element A
1the centre frequency transmitted can equal f
0+ (N-1) Δ f.
From the array element A being positioned at position, middle
n+1the frequency transmitted of each array element of turning right can successively at reference frequency f
0basis increases progressively according to the frequency increment Δ f preset.That is: N+2 array element A
n+2the centre frequency transmitted can equal f
0+ Δ f, N+3 array element A
n+3the centre frequency transmitted can equal f
0+ 2 Δ f, 2N array element A
2Nthe centre frequency transmitted can equal f
0+ (N-1) Δ f.
To the FDA radar that described herein according to the embodiment of the present invention.
Can find out with reference to figure 6 comparison diagram 1, FDA radar of the present invention can produce has transmitting of good point-type beam pattern, there is scan characteristic of better fixing a point compared with existing signal beam, therefore, it is possible to remove distance dependence of angle, improve the estimated accuracy of location.
Claims (3)
1. produce a method for FDA radar emission signal, described FDA radar comprises multiple arrangement array element point-blank, it is characterized in that, comprising:
Setting reference frequency and frequency increment;
Using described reference frequency as the emission signal frequency of array element being positioned at position, middle;
According to described reference frequency and described frequency increment, obtain the emission signal frequency of each array element of turning left from the array element being positioned at position, middle according to the mode of linear increment;
According to described reference frequency and described frequency increment, obtain the emission signal frequency of each array element of turning right from the array element being positioned at position, middle according to the mode of linear increment; And
Produce in corresponding array element according to described emission signal frequency and transmit and obtain FDA radar emission signal after superposing.
2. produce a device for FDA radar emission signal, described FDA radar comprises multiple arrangement array element point-blank, it is characterized in that, comprising:
Setting module, for setting reference frequency and frequency increment;
Central authorities' array element emission signal frequency generation module, for using described reference frequency as the emission signal frequency of array element being positioned at position, middle;
Left array element emission signal frequency generation module, for according to described reference frequency and described frequency increment, obtains the emission signal frequency of each array element of turning left from the array element being positioned at position, middle according to the mode of linear increment;
Right array element emission signal frequency generation module, for according to described reference frequency and described frequency increment, obtains the emission signal frequency of each array element of turning right from the array element being positioned at position, middle according to the mode of linear increment; And
Signal produces and laminating module, transmits for producing in corresponding array element according to described emission signal frequency and obtains FDA radar emission signal after superposing.
3. a FDA radar, comprise multiple arrangement array element point-blank, it is characterized in that: in described array element, the emission signal frequency being positioned at the array element of position, middle equals the reference frequency preset; The frequency transmitted of each array element of turning left from the array element being positioned at position, middle increases progressively according to the frequency increment preset successively on described reference frequency basis; The frequency transmitted of each array element of turning right from the described array element being positioned at position, middle increases progressively according to the frequency increment preset successively on described reference frequency basis.
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|---|---|---|---|
| CN201510586736.6A CN105116385B (en) | 2015-09-14 | 2015-09-14 | A kind of method of generation FDA radar emission signals, device and FDA radars |
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|---|---|---|---|
| CN201510586736.6A CN105116385B (en) | 2015-09-14 | 2015-09-14 | A kind of method of generation FDA radar emission signals, device and FDA radars |
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| CN105116385B CN105116385B (en) | 2017-06-20 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060152403A1 (en) * | 2005-01-12 | 2006-07-13 | Wicks Michael C | Method and apparatus for a frequency diverse array |
| US20090278732A1 (en) * | 2006-04-28 | 2009-11-12 | Paul Antonik | Method and apparatus for simultaneous synthetic aperture radar and moving target indication |
| CN103018737A (en) * | 2012-11-20 | 2013-04-03 | 电子科技大学 | Method for utilizing frequency distribution array (FDA) radar to estimate object distance and azimuthal angle and FDA radar |
| CN104297734A (en) * | 2014-10-20 | 2015-01-21 | 西安电子科技大学 | Deception interference rejection method for MIMO radar based on frequency diversity array |
| CN104635214A (en) * | 2015-02-12 | 2015-05-20 | 西安电子科技大学 | Airborne forward-looking frequency diversity array radar distance fuzzy clutter suppression method |
-
2015
- 2015-09-14 CN CN201510586736.6A patent/CN105116385B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060152403A1 (en) * | 2005-01-12 | 2006-07-13 | Wicks Michael C | Method and apparatus for a frequency diverse array |
| US20090278732A1 (en) * | 2006-04-28 | 2009-11-12 | Paul Antonik | Method and apparatus for simultaneous synthetic aperture radar and moving target indication |
| CN103018737A (en) * | 2012-11-20 | 2013-04-03 | 电子科技大学 | Method for utilizing frequency distribution array (FDA) radar to estimate object distance and azimuthal angle and FDA radar |
| CN104297734A (en) * | 2014-10-20 | 2015-01-21 | 西安电子科技大学 | Deception interference rejection method for MIMO radar based on frequency diversity array |
| CN104635214A (en) * | 2015-02-12 | 2015-05-20 | 西安电子科技大学 | Airborne forward-looking frequency diversity array radar distance fuzzy clutter suppression method |
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