Authors: Ning Xie; Hui Wang
Addresses: College of Information Engineering, Shenzhen University, Shenzhen 518060, China; State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China. ' College of Information Engineering, Shenzhen University, Shenzhen 518060, China
Abstract: This paper presents a fast adaptive beamforming algorithm for CDMA wireless communications. The proposed algorithm is based on an array pattern synthesis technique and a simple Direction of Arrival (DOA) estimation method. The former is to minimise the weighted squared errors between the achieved pattern and a reference pattern. The latter is to estimate DOA roughly with simplicity. Although there are some tiny errors during DOA estimation, the proposed algorithm provides a well-satisfied SINR performance as well as a fast convergence rate compared with the conventional beamforming algorithms with a low complexity. Simulation results are presented in various signal environments to show the superior performance of the proposed algorithm.
Keywords: antenna arrays; adaptive beamforming; beam pattern synthesis; fast convergence rate; DOA estimation; direction of arrival; CDMA; wireless communications; simulation.
International Journal of Wireless and Mobile Computing, 2012 Vol.5 No.3, pp.221 - 227
Received: 19 Dec 2011
Accepted: 29 Dec 2011
Published online: 16 Jul 2012 *