Rotated TCM systems with dual transmit and multiple receive antennas on Nakagami fading channels

This paper analyzes the bit-error rate performance of a dual transmission-multiple reception antenna system in conjunction with a rotated trellis-coded modulation scheme over Nakagami fading channels. A simple way to combine the exact calculation of the pairwise error event probability with the transfer function bounding techniques is described. This approach allows us to evaluate an extremely tight theoretical upper bound on the average bit-error probability. The parameters which dominate the performance of these transmission schemes on fading channels are extracted from this evaluation. Optimum adaptive and fixed-phase rotations have been calculated, showing that most of the power efficiency obtained by using the optimum adaptive-phase rotation can be retained by using the optimum fixed-phase rotation.