Double Space-Time Transmit Diversity with Subgroup Rate Control for UMTS: Throughput Analysis

摘要

This paper deals with a detailed throughput analysis of the DSTTD-SGRC (Double Space-Time Transmit Diversity with Sub-Group Rate Control) proposal which is under consideration for the MIMO extension of UMTS. We examine different receiver structures for DSTTD-SGRC and compare them to the HSDPA SISO (Single-Input Single-Output) and the HSDPA STTD (Space-Time Transmit Diversity) transmission scheme, which was already standardized in the 3GPP. Furthermore, a Linear Minimum Mean Squared Error (LMMSE) receiver avoiding the usual matrix inversion, is derived. The output of our simulations are throughput curves that take, beside to the MIMO receiver, the coding and also the Hybrid Automatic Retransmission Request (HARQ) into consideration.