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Expressions are found for the probability of error of a slow frequency-hopped spread-spectrum (FHSS) M-ary frequency shift keyed (FSK) multiple-access system in the presence of slow-nonselective Rayleigh or "single-term" Rician fading. The analysis is general enough for the consideration of the near/far problem under the specified channel conditions. Comparisons are made between the error expressions developed here and previously published [2] upper bounds. It is found, under certain conditions, that the previous upper bounds on the probability of error may exceed the true probability of error by an order of magnitude.

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