CN105116385B - A kind of method of generation FDA radar emission signals, device and FDA radars - Google Patents
A kind of method of generation FDA radar emission signals, device and FDA radars Download PDFInfo
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- CN105116385B CN105116385B CN201510586736.6A CN201510586736A CN105116385B CN 105116385 B CN105116385 B CN 105116385B CN 201510586736 A CN201510586736 A CN 201510586736A CN 105116385 B CN105116385 B CN 105116385B
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Abstract
The invention discloses a kind of method of generation FDA radar emission signals, device and FDA radars, array element of the FDA radars comprising multiple arrangements point-blank, the method includes：Setting reference frequency and frequency increment；Using reference frequency as the emission signal frequency of the array element positioned at middle position；According to reference frequency and frequency increment, the emission signal frequency of each array element for obtaining being turned left from the array element positioned at middle position according to the mode of linear increment；According to reference frequency and frequency increment, the emission signal frequency of each array element for obtaining being turned right from the array element positioned at middle position according to the mode of linear increment；FDA radar emission signals are obtained after transmission signal and superposition are produced in corresponding array element according to emission signal frequency.
Description
Technical field
The present invention relates to FDA Radar Technology field, more particularly to a kind of method, the device of generation FDA radar emission signals
And FDA radars.
Background technology
Frequency diversity array radar (FDA, Frequency Diverse Radar) is in the same time in different array elements
Transmission signal is applied with different difference on the frequencies, i.e.,：The centre frequency of the signal that each array element is launched is differed.These transmittings
The signal gone out spatially is overlapped mutually, and FDA radar beams can be made spatially to show some and added on angle position
By force, the characteristic that other weaken on angle position.
The arrangement mode of the array element of FDA radars can arrange point-blank, i.e., multiple array elements：In linear array mode
Arrangement.
Existing FDA radars linear array produce transmission signal when, by be located at one end first transmission signal of array element frequently
Rate is set as reference frequency f0, it is f from the emission signal frequency of the array element n-th array element successively to the right or to the left0+ n Δ f,
Δ f represents difference on the frequency, and Δ f is generally much less than f0.The transmission signal beam pattern of thus obtained FDA radars is as shown in figure 1, from figure
1 as can be seen that the position (red area in Fig. 1) that existing FDA radar emissions signal beam is strengthened is in banding, this pattern
Transmission signal wave beam determine FDA radars judge target distance and angle when interdependency occurs, i.e.,：If no
Know the size that angle is just unable to estimate out apart from size, equally, it is not known that the size of angle is also unable to estimate out the big of distance
It is small.Therefore, existing FDA radars are also needed to add a set of special method and asked solving the interdependency of distance and angle
Topic.
The content of the invention
It is an object of the invention to provide a kind of method of generation FDA radar emission signals, device and FDA radars, to solve
Certainly above-mentioned distance present in prior art and the complementary problem of angle.
An embodiment provides a kind of method of generation FDA radar emission signals, FDA radars include multiple
Arrangement array element point-blank, the method includes：Setting reference frequency and frequency increment；Using reference frequency as positioned at just
The emission signal frequency of the array element in centre position；According to reference frequency and frequency increment, according to the mode of linear increment obtain from
The emission signal frequency of each array element that the array element positioned at middle position is turned left；According to reference frequency and frequency increment, press
Mode according to linear increment obtains the emission signal frequency of each array element turned right from the array element positioned at middle position；According to
Emission signal frequency produces transmission signal in corresponding array element and obtains FDA radar emission signals after being superimposed.
An alternative embodiment of the invention provides a kind of device of generation FDA radar emission signals, and FDA radars are comprising more
Individual arrangement array element point-blank, also includes：Setting module, for setting reference frequency and frequency increment；Central array element
Emission signal frequency generation module, for using reference frequency as the emission signal frequency of the array element positioned at middle position；It is left
Array element emission signal frequency generation module, for according to reference frequency and frequency increment, according to the mode of linear increment obtain from
The emission signal frequency of each array element that the array element positioned at middle position is turned left；Right array element emission signal frequency produces mould
Block, for according to reference frequency and frequency increment, obtaining past from the array element positioned at middle position according to the mode of linear increment
The emission signal frequency of each right array element；And signal produce and laminating module, for according to emission signal frequency in phase
Transmission signal is produced in the array element answered and FDA radar emission signals is obtained after being superimposed.
Another bright embodiment of this law provides a kind of FDA radars, comprising multiple arrangement array element point-blank,
In array element, the emission signal frequency positioned at the array element of middle position is equal to reference frequency set in advance；From positioned at middle
The frequency of the transmission signal of each array element that the array element of position is turned left is successively on the basis of reference frequency according to set in advance
Frequency increment is incremented by；The frequency of the transmission signal of each array element turned right from the array element positioned at middle position is successively in base
It is incremented by according to frequency increment set in advance on quasi- frequency base.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, various other advantages and benefit is common for this area
Technical staff will be clear understanding.Accompanying drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention
Limitation.And in whole accompanying drawing, identical part is denoted by the same reference numerals.Wherein in the accompanying drawings, reference numeral
Alphabetic flag afterwards indicates multiple identical parts, when these parts are referred to, will omit its last alphabetic flag.Attached
In figure：
Fig. 1 is the launching beam schematic diagram that existing FDA radars are produced；
Fig. 2 is the flow chart of one embodiment of the method for generation FDA radar emission signals of the invention；
Fig. 3 is the schematic block diagram of device one embodiment of generation FDA radar emission signals of the invention；
Fig. 4 is the schematic diagram of one embodiment of FDA radars of the invention；
Fig. 5 is the schematic diagram of another embodiment of FDA radars of the invention；
Fig. 6 is the FDA radar emission signal beam figures that technical solution of the present invention is produced.
In the accompanying drawings, same or similar element is referred to using same or similar label.
Specific embodiment
Describe illustrative embodiments of the invention in detail referring now to accompanying drawing.It should be appreciated that shown in accompanying drawing and
What the implementation method of description was merely exemplary, it is intended that explaination principle of the invention and spirit, and not limit model of the invention
Enclose.
Generally, FDA radars can include multiple arrangements array element point-blank, and the spacing between array element can phase
Deng.
With reference to Fig. 2, Fig. 2 is the flow of one embodiment 200 of the method for generation FDA radar emission signals of the invention
Figure.Embodiment 200 shown in Fig. 2 can comprise the following steps 201 to 205.
In step 201.Setting reference frequency and frequency increment.
Generally, reference frequency f0Frequency increment Δ f can be much larger than.If for example, reference frequency is set into f0=
10GHz, then can be set to Δ f=5kHz by frequency increment.
In step 202., using reference frequency as the emission signal frequency of the array element positioned at middle position.
In one embodiment of the invention, if the array element in FDA radars is total for odd number (can be expressed as 2M+1
Individual, M is positive integer), then positioned at the array element only one of which of middle position, the array element is from the either end of linear array toward mediant
M+1.Therefore, it can for the centre frequency of the M+1 transmission signal of array element to be set to reference frequency f0.For example：
When the sum of array element is 13, the array element positioned at middle position is the 7th battle array from the either end of linear array toward mediant
Unit, then can be set to reference frequency f by the centre frequency of the 7th transmission signal of array element0。
In another embodiment of the present invention, if the array element in FDA radars is total for even number (can be expressed as 2N
Individual, N is positive integer), then the array element positioned at middle position can have two, and the two array elements are respectively the high order ends from linear array
Toward the n-th and N+1 of mediant.For example, when the sum of array element is 10, the array element positioned at middle position is from line
Any high order end of battle array, then can be by the transmission signal of the two array elements toward the 5th array element and the 6th array element of mediant
Frequency of heart is both configured to reference frequency f0。
In step 203, according to reference frequency and frequency increment, obtained from positioned at middle according to the mode of linear increment
The emission signal frequency of each array element that the array element of position is turned left.
In one embodiment of the invention, if the array element in FDA radars is total for odd number (can be expressed as 2M+1
Individual, M is positive integer), and these linear arrays are from left to right numbered from 1 to 2M+1 successively, then positioned at the battle array of middle position
Each array element that first (the M+1 array element) turns left be successively m-th, M-1 it is individual ..., the 1st.Transmitting in these array elements
It is f that the frequency of signal can set gradually according to the mode of linear increment0+Δf、f0+2Δf、…、f0+M·Δf。
In one embodiment of the invention, if the array element in FDA radars is total for even number (can be expressed as 2N
Individual, N is positive integer), and these linear arrays are from left to right numbered from 1 to 2N successively, then positioned at the array element of middle position
Each array element that (n-th array element) turns left is successively N-1, N-2 ..., the 1st.Transmitting letter in these array elements
Number frequency can be set gradually according to the mode of linear increment be f0+Δf、f0+2Δf、…、f0+(N-1)·Δf。
In step 204, according to reference frequency and frequency increment, obtained from positioned at middle according to the mode of linear increment
The emission signal frequency of each array element that the array element of position is turned right.
In one embodiment of the invention, if the array element in FDA radars is total for odd number (can be expressed as 2M+1
Individual, M is positive integer), and these linear arrays are from left to right numbered from 1 to 2M+1 successively, then positioned at the battle array of middle position
Each array element that first (the M+1 array element) turns right is successively M+2, M+3 ..., 2M+1 it is individual.In these array elements
It is f that the frequency of transmission signal can set gradually according to the mode of linear increment0+Δf、f0+2Δf、…、f0+M·Δf。
In one embodiment of the invention, if the array element in FDA radars is total for even number (can be expressed as 2N
Individual, N is positive integer), and these linear arrays are from left to right numbered from 1 to 2N successively, then positioned at the array element of middle position
Each array element that (the N+1 array element) turns right is successively N+2, N+3 ..., 2N.Transmitting in these array elements
It is f that the frequency of signal can set gradually according to the mode of linear increment0+Δf、f0+2Δf、…、f0+(N-1)·Δf。
In step 205, FDA is obtained after transmission signal and superposition being produced in corresponding array element according to emission signal frequency
Radar emission signal.
In one embodiment of the invention, the transmission signal of each array element that step 202 to 204 can be obtained
Centre frequency is applied in correspondence array element, and produces the formula of signal to be produced in each array element accordingly according to FDA radars array element
Transmission signal.These transmission signals can be obtained by FDA radar emission signals after being overlapped mutually.
So far the method for describing generation FDA radar emission signals according to embodiments of the present invention.
With reference to Fig. 6 and comparison diagram 1 as can be seen that produced by the method for generation FDA radar emission signals proposed by the present invention
FDA radar emission signals, with good point-type beam pattern, compared with existing signal beam have preferably fixed point sweep
Characteristic is retouched, the estimated accuracy of positioning is improved apart from dependence of angle therefore, it is possible to remove.Additionally, working as the inventive method application
When the FDA radars disposed, its hardware can not be changed, it is only necessary to which corresponding software section is upgraded.
It is similar with the method, present invention also offers the device of corresponding generation FDA radar emission signals.
Fig. 3 show the schematic block diagram of device one embodiment 300 of generation FDA radar emission signals of the invention.
FDA radars can include multiple arrangements array element point-blank, and the spacing between these array elements can be thought.
As shown in figure 3, device 300 can include：Setting module 301, for setting reference frequency and frequency increment；Center
Array element emission signal frequency generation module 302, for using reference frequency as the transmission signal of the array element positioned at middle position
Frequency；Left array element emission signal frequency generation module 303, for according to reference frequency and frequency increment, according to linear increment
Mode obtains the emission signal frequency of each array element turned left from the array element positioned at middle position；Right array element transmission signal is frequently
Rate generation module 304, for according to reference frequency and frequency increment, being obtained from positioned at center meta according to the mode of linear increment
The emission signal frequency of each array element that the array element put is turned right；And signal is produced and laminating module 305, for according to transmitting
Signal frequency produces transmission signal in corresponding array element and obtains FDA radar emission signals after being superimposed.
So far the device of generation FDA radar emission signals according to embodiments of the present invention is described.
With reference to Fig. 6 and comparison diagram 1 as can be seen that produced by the device of generation FDA radar emission signals proposed by the present invention
FDA radar emission signals, with good point-type beam pattern, compared with existing signal beam have preferably fixed point sweep
Characteristic is retouched, the estimated accuracy of positioning is improved apart from dependence of angle therefore, it is possible to remove.Additionally, working as apparatus of the present invention application
When the FDA radars disposed, its hardware can not be changed, it is only necessary to which corresponding software section is upgraded.
Present invention also offers a kind of FDA radars.
With reference to Fig. 4, Fig. 4 is the schematic diagram of one embodiment 400 of FDA radars of the invention.In the embodiment shown in Fig. 4
In, FDA radars 400 can include odd number arrangement array element A point-blank1、A2、…、AM-1、AM、AM+1、AM+2、
AM+3、…、A2M+1, the spacing between these array elements can be with equal.
In these array elements, positioned at the array element A of middle positionM+1Emission signal frequency can be equal to it is set in advance
Reference frequency f0。
From the array element A positioned at middle positionM+1The frequency of the transmission signal of each array element turned left can successively in base
Quasi- frequency f0On the basis of according to frequency increment Δ f set in advance be incremented by.I.e.：M-th array element AMTransmission signal centre frequency
F can be equal to0+ Δ f, the M-1 array element AM-1The centre frequency of transmission signal can be equal to f0+ 2 Δ f, the 1st array element A1's
The centre frequency of transmission signal can be equal to f0+M·Δf。
The frequency of the transmission signal of each array element turned right from the array element positioned at middle position can successively in benchmark
Frequency f0On the basis of according to frequency increment Δ f set in advance be incremented by.I.e.：The M+2 array element AM+2Transmission signal center
Frequency can be equal to f0+ Δ f, the M+3 array element AM+3The centre frequency of transmission signal can be equal to f0+ 2 Δ f, 2M+1
Array element A2M+1The centre frequency of transmission signal can be equal to f0+M·Δf。
With reference to Fig. 5, Fig. 5 is the schematic diagram of another embodiment 500 of FDA radars of the invention.In the implementation shown in Fig. 5
In example, FDA radars 500 can include even number arrangement array element A point-blank1、A2、…、AN-2、AN-1、AN、AN+1、
AN+2、AN+3、…、A2N, the spacing between these array elements can be with equal.
In these array elements, positioned at two array element A of middle positionNAnd AN+1Emission signal frequency can be equal to it is pre-
The reference frequency f for first setting0。
From the array element A positioned at middle positionNThe frequency of the transmission signal of each array element turned left can successively in base
Quasi- frequency f0On the basis of according to frequency increment Δ f set in advance be incremented by.I.e.：The N-1 array element AN-1Transmission signal in
Frequency of heart can be equal to f0+ Δ f, the N-2 array element AN-2The centre frequency of transmission signal can be equal to f0+ 2 Δ f, the 1st battle array
First A1The centre frequency of transmission signal can be equal to f0+(N-1)·Δf。
From the array element A positioned at middle positionN+1The frequency of the transmission signal of each array element turned right can successively in base
Quasi- frequency f0On the basis of according to frequency increment Δ f set in advance be incremented by.I.e.：The N+2 array element AN+2Transmission signal center
Frequency can be equal to f0+ Δ f, the N+3 array element AN+3The centre frequency of transmission signal can be equal to f0+ 2 Δ f, the 2N battle array
First A2NThe centre frequency of transmission signal can be equal to f0+(N-1)·Δf。
So far FDA radars according to embodiments of the present invention are described.
With reference to Fig. 6 and comparison diagram 1 as can be seen that FDA radars of the invention can be produced with good point-type beam pattern
The transmission signal of shape, has preferably fixed point scan characteristic, therefore, it is possible to remove apart from angle compared with existing signal beam
Dependence, improves the estimated accuracy of positioning.
Claims (3)
1. a kind of method of generation FDA radar emission signals, battle arrays of the FDA radars comprising multiple arrangements point-blank
Unit, it is characterized in that, including：
Setting reference frequency and frequency increment；
Using the reference frequency as the emission signal frequency of the array element positioned at middle position；
According to the reference frequency and the frequency increment, obtained from the battle array positioned at middle position according to the mode of linear increment
The emission signal frequency of each array element that unit turns left；
According to the reference frequency and the frequency increment, obtained from the battle array positioned at middle position according to the mode of linear increment
The emission signal frequency of each array element that unit turns right；And
FDA radar emissions letter is obtained after transmission signal and superposition are produced in corresponding array element according to the emission signal frequency
Number.
2. a kind of device of generation FDA radar emission signals, battle arrays of the FDA radars comprising multiple arrangements point-blank
Unit, it is characterized in that, including：
Setting module, for setting reference frequency and frequency increment；
Central array element emission signal frequency generation module, for using the reference frequency as the array element positioned at middle position
Emission signal frequency；
Left array element emission signal frequency generation module, for according to the reference frequency and the frequency increment, according to linearly passing
The mode of increasing obtains the emission signal frequency of each array element turned left from the array element positioned at middle position；
Right array element emission signal frequency generation module, for according to the reference frequency and the frequency increment, according to linearly passing
The mode of increasing obtains the emission signal frequency of each array element turned right from the array element positioned at middle position；And
Signal is produced and laminating module, for producing transmission signal in corresponding array element according to the emission signal frequency and folding
Plus after obtain FDA radar emission signals.
3. a kind of FDA radars, comprising multiple arrangement array elements point-blank, it is characterized in that：In the array element, positioned at center
Between position array element emission signal frequency be equal to reference frequency set in advance；Turned left from the array element positioned at middle position
The frequency of the transmission signal of each array element is incremented by the basis of the reference frequency according to frequency increment set in advance successively；
The frequency of the transmission signal of each array element turned right from the array element positioned at middle position is successively in the reference frequency
On the basis of according to frequency increment set in advance be incremented by.
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| US7319427B2 (en) * | 2005-01-12 | 2008-01-15 | The United States Of America As Represented By The Secretary Of The Air Force | Frequency diverse array with independent modulation of frequency, amplitude, and phase |
| US20090278732A1 (en) * | 2006-04-28 | 2009-11-12 | Paul Antonik | Method and apparatus for simultaneous synthetic aperture radar and moving target indication |
| CN103018737B (en) * | 2012-11-20 | 2014-07-30 | 电子科技大学 | Method for utilizing frequency distribution array (FDA) radar to estimate object distance and azimuthal angle and FDA radar |
| CN104297734B (en) * | 2014-10-20 | 2017-03-08 | 西安电子科技大学 | Deceiving interference suppressing method based on the MIMO radar of frequency diversity array |
| CN104635214B (en) * | 2015-02-12 | 2017-01-04 | 西安电子科技大学 | Air-borne Forward-looking frequency diversity array radar range ambiguity clutter suppression method |
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