基于分数阶Fourier变换的阵列雷达运动目标检测算法

A array radar target detection algorithm based on fractional fourier transform

旁瓣对消技术是一种广泛应用于阵列雷达中的空域滤波技术,在理想干扰背景下有良好的抑制干扰的性能.然而在非理想干扰背景下,其抑制干扰的性能将急剧下降.此时若沿用匹配滤波器进行检波,由于信干比的不足,会影响对信号的检测和参数估计.本文作者提出在空域滤波后利用分数阶Fourier变换进行检波的方法,能一定程度地提高信干比.计算机仿真表明了该方法的有效性.

Sidelobe cancellation technology is a spatial filtering technology which widely used in array radar. It can perfectly restrain interference under ideal interference. However, in the context of non-ideal interference, interference suppression performance of its sharp decline. At this point, if matched filter detector in use, due to lack of SIR will affect the signal detection and parameter estimation. In this paper, the authors proposal to use fractional fourier transform detection methods after the use of spatial filtering which can increase the SIR, and through theoretical and simulation prove the effectiveness of the method.