An Improved Low Complexity Detection Scheme in MIMO-OFDM Systems

Jang-Kyun AHN
Hyun-Woo JANG
Hyoung-Kyu SONG

IEICE TRANSACTIONS on Information and Systems   Vol.E97-D    No.5    pp.1336-1339
Publication Date: 2014/05/01
Online ISSN: 1745-1361
DOI: 10.1587/transinf.E97.D.1336
Type of Manuscript: LETTER
Category: Fundamentals of Information Systems
MIMO-OFDM,  lattice reduction aided detection,  V-BLAST,  

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Although the QR decomposition M algorithm (QRD-M) detection reduces the complexity and achieves near-optimal detection performance, its complexity is still very high. In the proposed scheme, the received symbols through bad channel conditions are arranged in reverse order due to the performance of a system depending on the detection capability of the first layer. Simulation results show that the proposed scheme provides almost the same performance as the QRD-M. Moreover, the complexity is about 33.6% of the QRD-M for a bit error rate (BER) with 4×4 multi input multi output (MIMO) system.