REGULARIZED OPTIMUM BEAMFORMING FOR DOWNLINK CDMA SYSTEMS
Najib A. Odhah, Kamal Hassan Awadalla, Moawad Ibrahim Dessouky, Fathi E. Abd El‐Samie · Progress In Electromagnetics Research C · 2008
Abstract—In this paper, we propose an efficient receiver scheme to mitigate the effects of multiple access interference (MAI) and intersymbol interference (ISI) in downlink CDMA systems. This scheme comprises beamforming at the base station and a regularized zero forcing equalizer at the mobile unit. Beamforming is used to reduce the effect of the MAI. Then, a regularized zero forcing equalizer is used to reduce the effect of ISI and provide a better estimate of the data of interest. The performance of the proposed scheme is studied and compared with other traditional schemes. The simulation results show that the proposed scheme has a better performance than the other traditional schemes with a low degree of complexity at the mobile unit. 1.