摘要
针对多径效应,提出了一种相干源条件下MIMO雷达低仰角跟踪时波达方向估计的新方法.结合MIMO雷达的特点,考虑接收多径回波信号和发射多径信号,利用改进的只需一维搜索的最大似然算法对阵列接收数据进行了双端处理,即接收阵列处理和发射阵列处理.这相当于扩大了单端处理时的阵列孔径,不但提高了低信噪比下仰角分辨力和估计精度,还降低了计算量.
This paper proposes a new DOA （direction-of-arrival） estimation in low-angle tracking environment. For the MIMO radar, not only received multipath signals but also transmitted multipath signals should be considered due to the multipath effect. The proposed algorithm applies a double port signal processing to receivers and transmitters based on the improved Maximum Likelihood method which only needs one dimension search on space. This process can extend the array aperture respect to the case of single port array signal processing. Hence the new algorithm improves the resolution and accuracy of DOA estimation of the elevation at a low SNR and has low computational complexity.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
2008年第5期793-798,共6页
Journal of Xidian University
基金
国家部委科技重点实验室基金资助(9140C0105010704)
