基于最小二乘法的MIMO雷达发射信号设计

针对MIMO雷达最小旁瓣方向图设计法在主瓣范围内有时会出现较大的波动,提出主瓣单调约束方向图设计法。在利用方向图设计法求得协方差矩阵的基础上,基于把发射波形看作伪随机信号的思想,提出了一种利用最小二乘法由协方差矩阵反推具体发射信号序列及其权值的算法。仿真结果表明,主瓣单调约束方向图设计法能有效抑制主瓣波动,有利于目标的探测;发射信号序列的方向图与由协方差矩阵得到的方向图相符,验证了该算法有效。

Transmitting Signal Design for MIMO Radar Based on Least Square Method

Abstract] An algorithm of beampattern design with monotonically constraint in mainlobe is proposed to solve the problem that Minimum sidelobe beampattern design fluctuates largely in mainlobe sometimes .Then, based on treating waveforms as pseudorandom signals, a method, using least square, for finding the transmitting signal sequences and their weights from the covariance matrix is proposed ,where the covariance matrix is got from beampattern design. Simulation results certify that the improved algorithm can restrain the fluctuation in mainlobe, and that the beampattern of transmitting signal sequences is closed to the beampattern of the covariance matrix, which certify the validity of the algorithm.