Adaptive detection scheme in accordance with channel condition for MIMO-OFDM system

Authors:
Hun-Hee Lee;Myung-Sun Baek;Hyoung-Kyu Song
Affiliations:
Sejong University, Seoul, South Korea;Sejong University, Seoul, South Korea;Sejong University, Sseoul, South Korea
Venue:
Proceedings of the 6th ACM international symposium on Mobility management and wireless access
Year:
2008

Citing 2
Cited 0

A QRD-M/Kalman filter-based detection and channel estimation algorithm for MIMO-OFDM systems

IEEE Transactions on Wireless Communications
Adaptive control of surviving symbol replica candidates in QRM-MLD for OFDM MIMO multiplexing

IEEE Journal on Selected Areas in Communications

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Abstract

This paper proposes a MIMO detection scheme reducing the computational complexity and providing comparable performance to the QRD-M detection scheme for MIMO-OFDM systems. The proposed scheme checks the channel condition per subcarrier and then selects detection scheme either ordered DFE scheme or adaptive QRD-M detection scheme according to that information. The post-detection SNR, which judges channel condition, depends on Moore-Penrose pseudo-inverse matrix G. The proposed scheme selects the ordered DFE detection scheme in case of good channel condition and the adaptive QRD-M detection scheme in case of bad channel condition. The adaptive QRD-M detection scheme selects the number of survival symbols M in accordance with the channel condition at the each layer. Compared with the QRD-M (M=16) detection scheme, the proposed detection scheme reduces the computational complexity about 67 percents and achieves similar performance.