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Title: Adaptive spatial-subcarrier trellis coded MQAM and power optimization for OFDM transmission
Authors: Wong, Kai-Kit
Lai, Sai Kit
Cheng, R. S-K
Letaief, K. B.
Murch, Ross David
Keywords: Coded modulation
Multiple antennas
Spatial-subcarrier channel
Issue Date: May-2000
Citation: VTC 2000 - Spring 2000 IEEE 51st Vehicular Technology Conference, Tokyo, Japan, 15-18 May 2000, vol. 3, p. 2049-2053
Abstract: 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.
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