基于交替投影的MIMO雷达波形设计

MIMO radar waveform design based on alternating projection

针对基于最大化互信息(或最小均方误差)准则所提方法只得到理论上最优多输入多输出雷达波形,而无法产生可发射波形的问题,基于交替投影方法,提出一种新的可发射波形设计算法。该算法得到的可发射波形渐进逼近基于最大化互信息(或最小均方误差)准则得到的理论最优波形,且迭代的每一步都具有闭式解,因而可获得高效求解。仿真结果表明,相比较已提出的可发射波形设计方法,所提算法具有较好的最优波形逼近性能。

Since the previously-proposed method based on the criterion of maximum mutual information（MMI）or minimum mean-square error（MMSE） can acquire the theoretical optimum multiple-input and multiple-output（MIMO） radar waveform,but can＇t generate the transmitting waveform,a new transmitting waveform design algorithm based on alternating projection method is put forward. The transmitting waveform obtained by the proposed algorithm is gradually approximate to the theoretic optimum waveform acquired by means of MMI or MMSE criterion. The closed-form solution existing in each step of iteration can be solved effectively. The simulation results show that,in comparison with the previously-proposed transmitting waveform design method,the algorithm has better performance to approximate the optimal waveform.