摘要
提出了一个直扩码分多址 (DS CDMA)通信系统的接收信号模型 ,并在此模型的基础上推导出一种适用于DS CDMA系统的DOA (DirectionsofArrival)算法 .算法利用期望用户的扩频序列与接收信号的信号子空间的关系 ,来估计信号的DOA .该算法突破了在传统的DOA算法中检测的DOA数要小于阵列的天线数的限制 。
A space time model is developed on a code division multiple access system, then based on the model an algorithm is proposed for estimating the directions of arrival (DOA's) of signals received from desired users. The relationship of the subspace of the received signal and the spreading code of the desired user is used to provide unique estimates even when the number of required DOA's exceeds the number of antenna array elements. This scenario is well known to cause conventional direction finding algorithms (such as MUSIC or ESPRIT) to fail, and the algorithm performs much better than those conventional direction finding algorithms.
出处
《山东大学学报（理学版）》
CAS
CSCD
北大核心
2003年第1期68-72,共5页
Journal of Shandong University(Natural Science)
基金
国家自然科学基金 (60 172 0 5 1)资助项目
