MIMO NLMS-ZF data detection approach for WCDMA based HSDPA systems

Abstract

This paper details the nontrivial extension of the novel Normalized Least Mean Square Zero Forcing (NLMS-ZF) data detection algorithm from Single Input Single Output (SISO) to Multiple Inputs Multiple Outputs (MIMO) for the High Speed Data Packet Access (HSDPA) enabled Wideband Code Division Multiple Access (WCDMA) system. The MIMO NLMS-ZF algorithm which utilizes channel state information has had limited success due to difficulty in obtaining both simplicity and a rigorous solution. Even so, with only an approximate solution, it still performs better than the NLMS data detection algorithm for fast-varying channels.