Channel prediction for adaptive coded modulation in Rayleigh fading

Adaptive coded modulation (ACM) is a spectrally efficient wireless transmission scheme when the transmitter has perfect channel knowledge. We analyze how the performance of ACM schemes deteriorate when only partial channel state information (CSI) is available due to imperfect channel prediction. The results hold for Rayleigh fading, constant transmit power, perfect coherent detection in the receiver, an arbitrary number of independent receive antenna branches, maximum ratio combining (MRC), and any linear fading predictor based on periodically transmitted pilot symbols.