Adaptive PSAM in SIMO Systems with Imperfect CSI in Rayleigh Fading Channels

摘要

In this paper we provide an adaptive modulation approach that use adaptive pilot symbols in single input multiple output systems to maximize the spectral efficiency. The maximization is performed in the presence of imperfect channel state information at the transmitter. Also for reduce the computational complexity we propose a new method based on the curve fitting to find optimum power allocation on symbols. Numerical results show the accuracy of our new method and demonstrate that our adaptive system outperforms other traditional systems that use of non-adaptive pilot symbols with single antenna based on spectral efficiency performance measure.