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Radar slow time-domain constant modulus signal design method based on similarity constraint

A design method and slow-time technology, applied in radio wave measurement systems, instruments, etc., to achieve high SNR, improve solution efficiency, and reduce computational complexity

Active Publication Date: 2017-08-04
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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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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  • Radar slow time-domain constant modulus signal design method based on similarity constraint
  • Radar slow time-domain constant modulus signal design method based on similarity constraint
  • Radar slow time-domain constant modulus signal design method 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 radar slow time emission signal design method in a color Gaussian environment, belongs to the field of radar signal processing, and specifically relates to a radar slow time-domain signal design method. In order to improve the detection performance of a moving target in the additive color Gaussian noise, the monostatic radar slow time signal design method with high efficiency and high performance is proposed through optimization of the SNR with the constant modulus and similarity constraint. The method includes: firstly establishing a monostatic radar system slow time signal model, deriving a target function and constructing an optimization problem, and finally solving the optimization problem. According to the method, by employing a sequence iteration algorithm, one element of a signal is optimized in each step of iteration, a high-dimensional optimization problem is converted to a plurality of one-dimensional optimization problems with closed-form solutions, the calculation complexity is greatly reduced, the solving efficiency is improved, and the SNR is high.

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 Applications(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