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A Design Method of Radar Slow Time Domain Constant Modulus Signal Based on Similarity Constraint

A design method and slow time technology, applied in the field of moving target detection and radar slow time domain signal design, to achieve the effect of improving solution efficiency, high SNR, and reducing computational complexity

Active Publication Date: 2020-01-10
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that in order to improve the performance of moving target detection under additive color Gaussian noise, a monostatic radar with high efficiency and high performance slow time is proposed by optimizing SNR with constant modulus and similarity constraints Signal Design Method

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  • A Design Method of Radar Slow Time Domain Constant Modulus Signal Based on Similarity Constraint
  • A Design Method of Radar Slow Time Domain Constant Modulus Signal Based on Similarity Constraint
  • A Design Method of Radar Slow Time Domain Constant Modulus Signal Based on Similarity Constraint

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Embodiment Construction

[0033] combined with figure 1 , the specific implementation steps of the present invention are described as follows:

[0034] 1. Establish a monostatic radar system model

[0035] Considering that the monostatic radar transmits N pulses within a correlation processing interval (CPI), and at the receiving end, the matched filtering and peak sampling are completed for each pulse within its corresponding pulse repetition period (PRT), then the obtained observation vector is

[0036] x=αs⊙p(f d )+v

[0037] Among them α is the parameter that expresses target radar cross section area (RCS), s=[s 1 ,s 2 ,...,s N ] T is the slow-time signal emitted by the N×1-dimensional radar, s n is the nth element in s, [·] T Indicates the transposition operator, ⊙ is the Hadamard product,

[0038] p(f d )=[1,exp(j2πf d ),...,exp(j2πf d (N-1))] T is the target frequency steering vector, exp(·) is an exponential function, f d is the target normalized Doppler, v is a 0-mean additive co...

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Abstract

The invention discloses a design method of a radar slow-time transmission signal in a color-Gaussian environment, belongs to the field of radar signal processing, and particularly relates to a design method of a radar slow-time domain signal. In order to improve the performance of moving target detection under additive chromatic Gaussian noise, a slow-time signal design method for monostatic radar with high efficiency and high performance is proposed by optimizing the SNR under constant modulus and similarity constraints. The idea of ​​realizing the present invention is to first establish a slow-time signal model of a monostatic radar system, derive an objective function and construct an optimization problem, and finally solve the optimization problem. The method of the invention adopts the algorithm of sequence iteration, optimizes one element of the signal in each step of iteration, and then converts a high-dimensional optimization problem into a plurality of one-dimensional optimization problems with closed-form solutions, which greatly reduces the computational complexity and improves the solution efficiency while having high SNR.

Description

technical field [0001] The invention belongs to the field of radar signal processing, and in particular relates to a radar slow time domain signal design method, which is applicable to the moving target detection of single base radar in the Gaussian color environment. Background technique [0002] Radar slow time-domain signal design technology is a transmitting-end technology. This technology can suppress interference and improve the detection ability of moving targets by optimizing the matching of waveforms with moving targets and mismatching with the environment. It has broad application value in the field of radar signal detection. The detection of moving targets in the color-Gaussian environment is a common problem in radar signal detection. In order to improve the detection performance of the radar under this interference, the second-order statistical characteristics of the color-Gaussian are usually used to design the radar transmission signal to obtain the maximum out...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/40G01S7/41
CPCG01S7/40G01S7/418
Inventor 崔国龙余显祥付月卢术平张天贤孔令讲易伟杨晓波
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA