Lattice-Reduction Aided Signal Detection Method with Switching Detection Based on Channel Condition

Seung-Jin CHOI  Jong-Kwang KIM  Hyoung-Kyu SONG  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E100-A   No.11   pp.2539-2542
Publication Date: 2017/11/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E100.A.2539
Type of Manuscript: LETTER
Category: Communication Theory and Signals
MIMO-OFDM,  condition number,  lattice-reduction,  QRD-M,  minimum mean square error,  

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In this letter, a switching detection scheme based on a channel condition number for the MIMO-OFDM system is proposed. The switching algorithm operates by selecting one of three detection schemes of QRD-M, LR-aided MMSE-DFE, and LR-aided MMSE. The switching detection uses the threshold based on the switching algorithm according to the channel condition number. From the simulation results, the proposed detection scheme shows error detection performance and computational complexity in accordance with the threshold for switching detection.