A novel DOA algorithm for CDMA system
Jingyang Lu, Weiling Wu · 2004
Multiple access interference (MAI) is one of the key factors affecting the performance of DOA algorithm in code division multiple access (CDMA) system. In this paper, a space-time model is developed on CDMA system, based on the model an algorithm is proposed for estimating the direction of arrival (DOA) 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. The theory analysis and simulations prove the proposed algorithm get the square of spreading gain to suppress the effect of MAI.