针对电子侦察系统中多径效应导致雷达辐射源信号参数测量性能下降问题,提出了一种基于稀疏重构理论的雷达多径信号参数估计方法。该方法首先建立了多径信号的传输模型,然后分析了多径信号稀疏表示的可行性,着重论述了基于稀疏分解和信号重构的多径分量参数估计方法,最后进行了仿真实验。实验结果验证了文中方法的有效性,与传统方法相比,该方法具有较高的估算精度和较高的时延分辨率,文中的参数估计模型适用于各种调制信号。

Aiming at the influence of the multipath effect on the measurement of the emitter parameter in electronic reconnaissance system, a new parameter estimation method of multipath radar signal based on sparse reconstruction theory is proposed. Firstly the model of multipath transmission of radar signal is constructed. Then the feasibility of sparse representation for multipath signal is analyzed, and the sparse representation and signal reconstruction algorithm for multipath parameter estimation are discussed. Finally simulation experiment is carried out. Simulation results validate the validity of the proposed method. Comparing with the traditional method, this method has higher estimation accuracy and higher time-delay resolution, and the parameter estimation model in this paper is insensitive for modulation signals changed.

TN971

国家自然科学基金资助项目(61976113)