Multi-antenna systems for the cdma2000® F-PDCH

Several multiple antenna technologies have been proposed in various forms to the 3GPP2 standards body for the 1xEV-DV (1x EVolution for Data and Voice) standard. While open loop transmit diversity has been standardized for the fundamental and supplemental channels, no multiple antenna scheme has been standardized for the packet data channel. Therefore, it is important to understand the performance benefits of multiple antennas for the forward packet data channel (F-PDCH) of 1xEV-DV. This document provides a comparison of several multiple antenna technologies from an information theory perspective and through link level simulations. In addition, the performance benefits of minimum mean squared error (MMSE) equalizers are discussed. It is shown that open loop diversity schemes provide marginal gain over single antenna systems, while closed loop diversity systems provide significant gains. Further, it is shown that MMSE equalizers provide significant gains for multi-path channels.