Multiplexing two information sources over fading channels: a cross-layer design perspective
Signal Processing - Special section: Advances in signal processing-assisted cross-layer designs
Optimal training for time-selective wireless fading channels using cutoff rate
EURASIP Journal on Applied Signal Processing
The Adaptive PSAM Design in Cross-Layer
Wireless Personal Communications: An International Journal
Adaptive PSAM in SIMO systems with imperfect CSI in Rayleigh fading channels
Proceedings of the 2009 International Conference on Hybrid Information Technology
Optimizing antenna configuration for MIMO systems with imperfect channel estimation
IEEE Transactions on Wireless Communications
On the capacity and energy efficiency of training-based transmissions over fading channels
IEEE Transactions on Information Theory
A unified treatment of optimum pilot overhead in multipath fading channels
IEEE Transactions on Communications
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Enabling linear minimum-mean square error (LMMSE)-based estimation of random time-selective channels, pilot-symbol-assisted modulation (PSAM) has well-documented merits as a fading counter-measure boosting bit-error rate performance. We design average-rate optimal PSAM transmissions by maximizing a tight lower bound of the average channel capacity. Relying on a simple closed-form expression of this bound in terms of the LMMSE channel estimator variance, we obtain PSAM transmissions with optimal spacing of pilot symbols and optimal allocation of the transmit-power budget between pilot and information symbols. Equi-powered transmitted symbols, channels with special Doppler spectra, and analytical and simulation based comparisons of possible alternatives shed more light on information-theoretic aspects of PSAM-based transmissions.