A Low Complexity QRD-M Algorithm with Reduced Search Path in MIMO-OFDM Systems
Jong-Kwang Kim, Chang-Hee Kang, Jae-Hyun Ro, Hyoung-Kyu Song
Signals and Telecommunication Journal, Vol. 6, No. 1, 2017.
DOI: 
Link: http://www.dline.info/stj/fulltext/v6n1/stjv6n1_1.pdf
Abstract:
The multi-input multi-output with orthogonal frequency division multiplexing (MIMO-OFDM) is developed in
order to improve data rate without any additional bandwidth. Many detection schemes have been developed in MIMOOFDM
systems. Among detection algorithms, QR decomposition with M algorithm (QRD-M) has excellent error performance.
However, the QRD-M has high complexity. In order to reduce the complexity, the low complexity QRD-M detection scheme is
proposed in this paper. The proposed scheme has the threshold in order to reduce tree search. Simulation results show that
the proposed scheme has similar error performance with the conventional QRD-M and has lower complexity than the
conventional QRD-M.