Method for detecting moving target on ground by utilizing bistatic radar based on MIMO (Multiple Input Multiple Output)

Abstract

The invention discloses a method for detecting a moving target on the ground by utilizing a bistatic radar based on MIMO (Multiple Input Multiple Output), mainly solving the problems that the traditional distance dependence compensating method has large calculating amount and the compensation can be carried out by needing knowing some radar parameters. The method comprises the realization steps of: (1) carrying out matched filtering on echo data of the radar by utilizing transmitted waveform; (2) eliminating a distance dependence characteristic of a clutter spectrum by utilizing a projection method; (3) evaluating a clutter wave covariance matrix by utilizing the data of which the distance dependence influence is eliminated; (4) obtaining an optimal weight vector according to a principle of space-time adaptive processing; and (5) weighting the data by utilizing the optimal weight, eliminating the background clutter wave and detecting a target signal. In the invention, the principle issimple; the calculation of eliminating the distance dependence by utilizing the projection method has low complexity; compared with a bistatic radar based on SISO (Single Input Multiple Output), the method disclosed by the invention has better ground moving target detecting performance; and the moving target on the ground can be detected under the condition of not knowing radar parameters.

Description

technical field [0001] The invention belongs to the technical field of radar, relates to multiple-input multiple-output MIMO and bistatic radar ground moving target detection, and can be used for bistatic ground ground moving target detection radar to eliminate ground clutter and separate target signals to be detected. Background technique [0002] In modern warfare, radar has become an essential military device. Many high-tech radars are developed to meet certain military applications, and ground moving target detection is an important application of radar. For airborne or spaceborne radar, since the radar is in the downward-looking working state, the echo inevitably contains a large number of strong ground clutter signals, and the clutter has a wide distribution range and high intensity. The speed relative to the carrier aircraft is different; at the same time, due to the movement of the radar platform, the clutter spectrum is greatly expanded, so that the target is often ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome above-mentioned deficiencies in prior art, propose a kind of ground moving target detection method based on MIMO bistatic radar, to abandon the dependence of bistatic ground moving target detection radar on the distance, reduce computational complexity, without When radar system parameters need to be estimated, space-time adaptive processing is used to eliminate ground clutter and detect target signals

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