Synthesis method of mimo radar transmission waveform based on coordinate descent algorithm

A technology of transmitting waveform and coordinate drop, applied in the field of radar, it can solve the problems of unable to generate constant modulus transmit waveform, unable to achieve anti-jamming, ignoring anti-jamming conditions, etc.

Active Publication Date: 2020-02-07
XIDIAN UNIV
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Problems solved by technology

The disadvantage of this method is that the SDR model only approximates the desired transmission pattern with the least squares criterion, ignoring the anti-jamming conditions, so the transmitted waveform synthesized by the SDR model cannot realize the anti-jamming function
The disadvantage of this method is that in the actual operation of the radar, in order to ensure the maximum working efficiency of the transmit power amplifier of each array element, the transmit waveform must have a constant mode characteristic, and this method cannot generate a constant mode transmit waveform

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  • Synthesis method of mimo radar transmission waveform based on coordinate descent algorithm
  • Synthesis method of mimo radar transmission waveform based on coordinate descent algorithm
  • Synthesis method of mimo radar transmission waveform based on coordinate descent algorithm

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] Refer to attached figure 1 , the concrete steps of the present invention are described as follows:

[0033] Step 1. Construct the steering vector in the interference airspace.

[0034] Substitute the azimuth angle of the opponent's interference source into the interference steering vector formula to obtain the interference airspace steering vector.

[0035] The described interference steering vector formula is as follows:

[0036]

[0037] Among them, a(θ k ) represents the azimuth angle θ of the opponent’s kth interference source k The steering vector in the interference space at , the value range of k is [1,K], K represents the total number of interference sources, exp represents the exponential operation with a natural constant as the base, j represents the symbol of the imaginary unit, π represents the pi, · represents the phase Multiplication operat...

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Abstract

The invention discloses a synthetic method for an MIMO (Multiple Input Multiple Output) radar transmitted waveform based on a coordinate descent algorithm. The invention mainly aims at solving the problems that the transmitted waveform synthesized in the prior art does not have an anti-jamming function or a constant modulus characteristic. The synthetic method comprises the following specific steps: firstly, constructing a jamming airspace steering vector; secondly, constructing an emission signal covariance matrix; thirdly, synthesizing an MIMO constant modulus transmitted waveform matrix; fourthly, revising elements in the MIMO constant modulus transmitted waveform matrix by adopting a coordinate descent algorithm for a following formula; fifthly, taking the elements in each line in theMIMO constant modulus transmitted waveform matrix as a transmitted waveform of each array element of radar. The synthetic method for the MIMO radar transmitted waveform based on the coordinate descentalgorithm, disclosed by the invention, has the advantage that the MIMO radar transmitted waveform with the anti-jamming function and the constant modulus characteristic can be synthesized.

Description

technical field [0001] The present invention belongs to the field of radar technology, and further relates to a method for synthesizing a multiple-input multiple-output (MIMO) radar transmission waveform based on a coordinate descent algorithm in the field of cognitive radar technology. The invention can quickly synthesize the MIMO radar transmitting waveform matrix with anti-jamming function according to the position information of the interference source of the other party and the position information of the radar detection target. Background technique [0002] The widespread application of digital components in radar systems produces MIMO radars. Different from traditional phased array radars, MIMO radar array elements can emit different signals. It is this waveform diversity capability that makes MIMO radars different from traditional phased array radars. Compared with, it has more advantages. MIMO radars can be divided into distributed MIMO radars and centralized MIMO ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/36G01S7/42
CPCG01S7/36G01S7/42
Inventor 纠博郑浩刘宏伟周生华
Owner XIDIAN UNIV
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