Multiuser Detection for DS/CDMA Systems with Adative Antenna Array

초록

Recently, the study on adaptive antenna array systems has been investigated to combat multiple access interference for CDMA systems. Adaptive antenn array can cancel out undesired signal using beamforming. However, if there interfefing signals from undesired users with the same arrival angle as that of a desired user, an adaptive antenna array cannot suppress it. This paper proposes an adaptive antenna array including a multiuser detection unit to cancel out remaining interference at the same beamforming region(arrival angel). The performance analysis of the proposed system is developed for rfequency selective Rayleigh fading channels. Simulation results show that the proposed system provides a significantly enhanced performance.