A modified multitarget adaptive array algorithm for wireless CDMA system.
The paper presents a modified least squares despread respread multitarget constant modulus algorithm (LS-DRMTCMA). The cost function of the original algorithm was modified by the minimum bit error rate (MBER) criterion. The novel algorithm tries to optimize weight vectors by directly minimizing bit error rate (BER) of code division multiple access (CDMA) mobile communication system. In order to achieve adaptive update of weight vectors, a stochastic gradient adaptive algorithm was developed by a kernel density estimator of possibility density function based on samples. Simulation results showed that the modified algorithm remarkably improves the BER performance, capacity and near-far effect resistance of a given CDMA communication system.
Liu
Yun-hui
YH
Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200030, China. yhliu0819@hotmail.com.
Yang
Yu-hang
YH
D000465:Algorithms; D040421:Cell Phone; D003195:Computer Communication Networks; D003198:Computer Simulation; D016247:Information Storage and Retrieval / Q000379:methods*; D008962:Models, Theoretical