A Noise-Predictive Partial Decision-Feedback Detection for MIMO Systems
Ni Xing①; Wang Xiao-xiang①;Du Juan①②
①School of Information Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China; ②Beijing Mobile Communication Co., Ltd., Beijing 100053, China
Abstract：The traditional Vertical-Bell Laboratory layered Space-Time(V-BLAST) systems adopt an Ordered Decision-Feedback(ODF) detection strategy, which can significantly outperform the liner detector, however, it increases the computational complexity. Based on the conception of segmented detection, an improved noise-predictive Partial Decision-Feedback(PDF)detector is proposed, it introduces the MMSE principle and divides the receive signals into two segments. Since only feeding back the decision once, the MMSE-PDF detector reduces complexity significantly compared to the conventional ODF detector. The simulation results show that in the condition of SUI-3 channel model, 2 transmission antennas and 4 receive antennas, in the level, compared with the complicated V-BLAST system, the novel receiver only suffers 0.6dB loss, however, it 10-4 has more or less 2~3 dB performance gains compared with the linear and other improved receiver based on the MMSE principle.
2008, Vol. 30 
