Research on False Target Recognition Method Based on Distance-Speed Matching Characteristic

Abstract

To solve the problem of radar main lobe deception jamming, a false target recognition method based on distance-speed matching is proposed. Firstly, the difference between the real target and false target is analyzed in distance-speed matching feature. Then, based on radar echo points, the radial velocity and the doppler velocity are extracted utilizing least square fitting and three points interpolated DFT. Finally, according to target velocity difference probability distribution function, the threshold <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\lambda$</tex> is determined to distinguish real target and false target based on identification probability P <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">c</inf> and error probability P <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">e</inf> . The simulation results show that the algorithm can effectively identify false targets, and can obtain high recognition probability and low error probability under the condition of high speed estimation accuracy and large difference of false target speed.