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 10-4has more or less 2~3 dB performance gains compared with the linear and other improved receiver based on the MMSE principle.