Multiple narrow-band interferers in an FH-DPSK spread-spectrum communication system

An analysis of the effect of multiple narrow-band interfering signals on the probability of error in a frequency-hopped differential phase shift keyed (FH-DPSK) spread-spectrum communication system is given. A basic assumption in this analysis is that the sum of the outputs from an n-subchannel receiver can be modeled as a Gaussian random variable. Subject to this assumption, numerical evaluation of the probabilities of error for both nonfading and Rayleigh fading channels are presented. The results indicate that for n ≥ 32 adequate performance can be achieved even when each of the subchannels has an interfering signal present.