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发射分集多输入多输出(MIMO)雷达利用分布式发射阵列对目标回波去相干,然后利用集中式接收阵列直接使用接收到的目标回波(不分离各发射阵元的信号)进行多目标角度估计.文中分别在Swerling I和II目标模型下,分析了目标回波之间的相关性.通过分析得到:(1)在Swerling II模型下,目标回波不相关(2)在Swerling I模型下,要使目标回波的相关性随着发射阵元数的增加而降低,发射阵元增加前后的信号归一化协方差矩阵要满足一定关系,文中给出了这个关系最后目标回波相关性和角度估计性能的计算机仿真验证了理论分析的正确性.
Transmit diversity MIMO (Multiple Input Multiple Output) radar uses a distributed transmit array to de-coherently target echoes and then uses the centralized receive array to directly use the received target echoes (signals that do not separate the individual transmit elements) for multiple target angles , The correlation between the target echoes is analyzed under the Swerling I and II target models respectively, and the results show that: (1) the target echoes are uncorrelated under the Swerling II model; (2) under the Swerling I model , So that the correlation of the target echoes decreases with the increase of the number of transmitting elements and the normalized covariance matrix of signals before and after the increase of transmitting elements must satisfy a certain relationship. And computer simulation of angle estimation performance verify the correctness of theoretical analysis.