Channel Compensation for SFBC-OFDM Systems in Broadband Wireless Channels
نویسندگان
چکیده
In this paper, we consider orthogonal space-frequency transmit diversity schemes for OFDM systems in broadband wireless channels. We propose a compensation method to prevent error floor caused by unequal subchannels in the space-frequency block coded OFDM systems for 2 and 3 transmit antennas while providing diversity gain. We will show that for 2 antennas case, the proposed compensation method gives the zero forcing solution. We compare the proposed method with the space-time block coded OFDM systems with respect to broadband wireless channel specifications. We also show that channel compensation method can be performed after channel estimation using a Kalman filter.
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