Fluctuations of MIMO Wireless Channels

Multiple-input multiple-output (MIMO) communication technology has the potential to resolve the bottleneck in traffic capacity for future wireless networks. Applying MIMO techniques to mobile communication systems, the problem of channel fading between the transmitters and receivers, which results in received signal strength fluctuations, is inevitable. This book provides some analytical methodologies to investigate the variation of MIMO channels, based on some mathematical results of Brownian motion. In particular, accurate analytical approximations for the level crossing rate (LCR) and average fade duration (AFD) of the several MIMO channel metrics are derived. Also, the temporal behavior of MIMO channels is studied via Markov model constructions. In addition, the instantaneous signal to interference plus noise ratio (SINR) of eigenmode transmission with a feedback time delay is analyzed. Finally, the fluctuation of the channel in the frequency domain is examined due to its practical importance in orthogonal frequency division multiplexing (OFDM) systems.