In order to make the analytical evaluation of portable radio link performance tractable while avoiding lengthy simulations, Intersymbol interference and cochannel Interference are often modelled as non-fading, gaussian noise. This paper investigates the viability of such an approach for wide-band channels where equalization and space diversity are used to combat interference and signal fading. Comparisons of results obtained using such an assumption of interference with those of a simulation-based approach indicate that as long as the number of cochannel Interferers is smaller than the space diversity order, the variance of the gaussian interfering symbols can be adjusted to provide a reasonable estimate of performance over error rates of interest.

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Journal IEEE Transactions on Communications
Despins, C.L. (Charles L.), Falconer, D.D, & Mahmoud, S.A. (1994). Impact of a Non-Fading Gaussian Characterization of Interference on Portable Radio Link Analysis. IEEE Transactions on Communications, 42(234), 396–402. doi:10.1109/TCOMM.1994.577066