Dual Branch CDMA Receivers for Downlink Data Communications in Mimo-Hsdpa

This paper introduces two kinds of receivers, chip-level receivers and symbol-level receivers with Grake receivers. We propose an adaptive finger selection scheme of symbol- level receivers and it reduces almost a half of original complexity. When channel paths are dense, for symbol-level receivers with non-ideal channel estimation, we develop a receive scheme which combines channel estimation and receive finger selection. It increases system reliability effectively. We introduce serial interference cancellation (SIC) and soft-decision SIC to suppress multiple antennas interference. At the same time, it refers that soft-decision is necessary for V-BLAST structure of multiple antennas multiplexing. At last, simulation results prove the conclusion valid in this paper.