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Cognitive MTD radar waveform design method

A technology of radar waveform and radar echo, which is applied in the direction of radio wave measurement system, instrument, etc., can solve the problems such as complex solution and difficulty in real-time processing

Active Publication Date: 2016-03-30
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

Due to the complexity of solving the problem, it is difficult to achieve real-time processing

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  • Cognitive MTD radar waveform design method
  • Cognitive MTD radar waveform design method
  • Cognitive MTD radar waveform design method

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[0053] The present invention provides a method for recognizing MTD radar waveform design. In order to make the purpose, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific implementations described here are only used to explain the present invention, not to limit the present invention.

[0054] All steps and conclusions of the present invention are verified correctly in Matlab, and the present invention will be further explained below in conjunction with the accompanying drawings.

[0055] In this embodiment, it is assumed that what the receiving end receives is Gaussian white noise, its covariance matrix is ​​M, and the variance σ of the noise is n 2 = 0.01. The received clutter is characterized by the Gaussian spectrum of the clutter, and the value of each element in the clutter covariance matrix ...

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Abstract

The invention provides a cognitive MTD radar waveform design method comprising the following steps: (1) first, establishing an MTD radar echo signal model in a signal-related clutter environment, and putting forward a model of a waveform optimization problem based on the signal-clutter-noise ratio (SCNR) maximization criterion; (2) then, carrying out coding design, and converting the non-convex optimization model into a convex optimization model; (3) further getting a simplified model through the assumption on the environment, namely, under white noise; and (4) finally, solving the model by use of an optimal coding method based on simple gradient. According to the invention, the signal-clutter-noise ratio SCNR non-convex optimization problem is converted into an easy-to-process convex optimization problem; the model is solved by use of the optimal coding method based on simple gradient, so that the echo SCNR can be effectively improved through slow time-domain coding; and the method has the characteristics of less computation and good real-time performance.

Description

technical field [0001] The invention relates to a slow-time waveform coding design method for a cognitive moving target detection radar, and belongs to the field of cognitive radar waveform design. Background technique [0002] The cognitive MTD radar system can change the transmission waveform in real time through continuous interaction with the environment, so as to achieve optimal matching with the environment. The realization of cognitive radar includes four key technologies: scene perception and description, waveform optimization technology, adaptive mechanism, autonomous operation and management. Among them, the waveform optimization technology is based on the radar echo and prior knowledge, etc., to design the optimal transmission waveform, which directly affects the performance of the cognitive radar. [0003] The design of waveform optimization is to maximize the performance of the system under certain system constraints. For cognitive MTD radar, under the conditi...

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Application Information

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IPC IPC(8): G01S7/32
CPCG01S7/32
Inventor 张劲东史常丽邱晓燕唐笑为
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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