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Adaptive spatial-subcarrier trellis coded MQAM and power optimization for OFDM transmission

Authors Wong, Kaikit
Lai, Saikit
Cheng, Roger Shu Kwan View this author's profile
Letaief, Khaled Ben View this author's profile
Murch, Ross David View this author's profile
Issue Date 2000
Summary Recently, space-time coding or coded modulation has demonstrated that significant increases-in system capacity and performance can be achieved by incorporating multiple antennas at the transmitter and (optional) multiple antennas at the receiver. In this paper, we propose an adaptive spatial-subcarrier trellis coded modulation using MQAM for orthogonal frequency division multiplexing (OFDM) transmission by using instantaneous channel state information and employing multiple antennas at both the transmitter and the receiver. In particular, our objective is to minimize the total transmit power required for each OFDM transmission, by optimizing the power allocation, code rate and modulation scheme in each spatial-subcarrier channel, while maintaining a given data rate and bit error probability. To illustrate the potential of our proposed system, Monte Carlo simulation results are provided.
ISBN 0-7803-5718-3
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Language English
Format Conference paper
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