Abstract
Goldsmith and Varaiya derived the capacity of a single-user flat-fading channel with channel measurement information at the transmitter and receiver for various adaptive transmission policies. In this chapter, we first apply the general theory that they developed and present closed-form expressions for the capacity of Rayleigh fading channels under different adaptive transmission schemes with and without diversity combining. In particular, we consider three adaptation policies: optimum simultaneous power and rate adaptation, constant power with optimum rate adaptation, and channel inversion with fixed rate. We then investigate the impact of maximal-ratio diversity (MRC) on the Shannon capacity in conjunction with each of these adaptive transmission schemes.
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