Symbol-based processing with balanced subcarrier performance for MIMO-OFDM systems

Authors:
Yinman Lee;Yun-Jung Hsieh;Hong-Wei Shieh
Affiliations:
Graduate Institute of Communication Engineering, National Chi Nan University, Taiwan, R.O.C.;Graduate Institute of Communication Engineering, National Chi Nan University, Taiwan, R.O.C.;Graduate Institute of Communication Engineering, National Chi Nan University, Taiwan, R.O.C.
Venue:
IEEE Communications Letters
Year:
2009

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Abstract

Recently, symbol-based beamforming/combining has been introduced for OFDM systems with multiple transmit and receive antennas [1]. Despite the complexity reduction, the resultant SNR values of different subcarriers are often not balanced, and it limits the system performance. In this letter, we propose to use the max-min criterion to overcome the problem. Simulation results show that the error-rate performance of the proposed symbol-based processing scheme can be improved as compared with that of the conventional one.