Channel-Adaptive Detection Scheme Based on Threshold in MIMO-OFDM Systems

Seung-Jun YU  Jang-Kyun AHN  Hyoung-Kyu SONG  

IEICE TRANSACTIONS on Information and Systems   Vol.E97-D   No.6   pp.1644-1647
Publication Date: 2014/06/01
Online ISSN: 1745-1361
DOI: 10.1587/transinf.E97.D.1644
Type of Manuscript: LETTER
Category: Fundamentals of Information Systems
V-BLAST,  QRD-M,  MIMO-OFDM,  condition number,  

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In this letter, an improved channel-adaptive detection scheme based on condition number combined with a QRD-M and CLLL algorithms is presented for MIMO-OFDM systems. The proposed scheme estimates the channel state by using the condition number and then the number of layers for the QRD-M is changed according to the condition number of channel. After the number of layers is determined, the proposed scheme performs the combined QRD-M and CLLL. Simulation results show that the BER curves of the proposed scheme and QRD-M using CLLL have similar performance. However, the complexity of the proposed scheme is about 27% less than QRD-M detection using CLLL.