应用于CDMA系统的迭代DOA估计算法

提出一种应用于CDMA系统的高分辨率迭代DOA估计算法,这种算法利用迭代逐步从空间谱中移出被检测出的信号,然后从残留空间谱进一步搜寻信号.算法对信号的相关性没有做任何假设,所以在相干多径环境中不需要进行运算量很大的特征值分解或空间平滑.实验证明这种方法的性能优于MUSIC算法或MVM算法.

High-Resolution Iterative DOA Algorithm for CDMA System

An iterative high-resolution DOA algorithm is proposed for applications of multipath direction finding in W-CDMA Space-Time receiver structures, employing adaptive antenna arrays. The algorithm iteratively removes detected signals from the received data, then searches the residue spatial spectrum for further signals. Each stage of the algorithm is based on the robust Conventional Beamformer. The algorithm makes no assumptions about signal correlation, hence does not require any computationally expensive eigen decomposition or spatial smoothing in coherent multipath scenarios. Results are presented illustrating high-resolution at significantly lower SNR levels than those obtained by classical DOA algorithms such as MUSIC and MVM.