Abstract :
Lee (see ibid., vol.39, p.187, no.8, 1990) proposed a very simple and elegant model for estimating the capacity of slowly fading channels. A small error in his paper, however, has led to an inexact picture. We correct that inaccuracy. As a consequence, the loss in capacity of a Rayleigh fading channel with respect to the additive white Gaussian noise (AWGN) channel turns out to be negligible for all values of the signal-to-noise ratio that are of interest. Furthermore, we extend the analytical results to the situation with M-branch diversity and Ricean fading channels. The lower moments of the associated distributions, i.e., of the /spl chi//sup 2/-distribution (Nakagami with integer m-parameter) and Rice distribution agree when the parameters of the distribution are suitably chosen. With that choice of parameters, the capacities of the M-branch diversity and of the Ricean fading channel become almost identical.
Keywords :
Gaussian channels; Rayleigh channels; Rician channels; channel capacity; diversity reception; parameter estimation; statistical analysis; AWGN channel; M-branch diversity; Nakagami distribution; Rayleigh fading channel; Rayleigh fading environment; Rice distribution; Ricean fading channel; additive white Gaussian noise; analytical results; channel capacity estimation; integer m-parameter; lower moments; parameters; signal-to-noise ratio; slowly fading channels; AWGN channels; Additive white noise; Capacity planning; Channel capacity; Equations; Fading; Gaussian noise; Network address translation; Rayleigh channels; Signal to noise ratio;
