Link adaptation of MIMO-OFDM transmission exploiting the Rician channel K-factor

Authors:
Kun-Yi Lin;Rong-Terng Juang;Hsin-Piao Lin;Wen-Jun Shyu;Pangan Ting
Affiliations:
National Taipei University of Technology, Taipei, Taiwan;Industrial Technology Research Institute, Hsinchu,Taiwan;National Taipei University of Technology, Taipei, Taiwan;National Taipei University of Technology, Taipei, Taiwan;Industrial Technology Research Institute, Hsinchu,Taiwan
Venue:
MWS'09 Proceedings of the 2009 IEEE conference on Mobile WiMAX
Year:
2009

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Abstract

This paper presents a link adaptation scheme for the MIMO-OFDM system to achieve high spectral efficiency in a required BER performance. The modulation order and MIMO transmission mode are selected via a look-up table according to the SNR and Rician channel K-factor instead of the channel relative condition number. The BER and spectral efficiency performance of the MIMO-OFDM system is evaluated by simulation. Result shows that the spectral efficiency can be achieved up to 9bps/Hz under Rician channel K-factor of 3.3dB when SNR is 30dB. The spectral efficiency is higher under low K- factor Rician channel than in high K-factor one. The throughput of the proposed adaptive MIMO-OFDM system considers both K-factor of the Rician channel and SNR can be achieved up to 80Mbps higher than the method without considering the Rician channel K-factor.