基于区域多帧联合处理的LFMCW雷达强散射源环境下微弱目标回波信号特征增强技术

在强散射干扰源存在的条件下，线性调频连续波(linear frequency modulated continuous wave, LFMCW)雷达回波在距离维呈现回波信号频谱扩散现象，给雷达微弱目标检测带来严重的技术挑战. 基于对检测目标中心区域多个相邻雷达波束回波数据各分量之间的相关性分析，提出基于区域多帧联合处理的LFMCW雷达强散射源环境下微弱目标特征增强技术，通过加权补偿，利用来自目标附近扫描区域的多帧数据进行多帧联合处理，增强微弱目标回波信号特征，提升微弱目标的检测能力. 通过某型异物检测雷达实测数据分析结果，验证了该方法能够有效处理强散射源存在条件下的微弱目标检测问题.

The weak target enhancement based on the local multi-frame joint procession in the presence of strong scattering sources for LFMCW radar

In the presence of the strong scattering sources,the spectrum has spread throughout the frequency domain of the return signal,resulting in the challenge of detecting weak target for the linear frequency modulated continuous wave(LFWCW)radar system.Based on the relevance analysis among the multi-frame difference-frequency signals derived from the neighboring region of target direction,the weak target feature enhancement technology based on the multi-frame processing jointly is proposed through weighting method of compensation in range dimension.Then,the multi-frame joint procession is carried out to promote the detecting capability for the weak target with return signal feature enhancement.Finally,the analysis results of experimental data from a foreign matter detection radar shows that the clutter suppression can be effectively conducted by the proposed algorithm.