The performance of frequency-hop spread-spectrum multiple-access networks u
sing orthogonal M-ary frequency-shift keying modulation with noncoherent de
tection is analyzed under tone jamming, Rayleigh fading, and additive white
Gaussian noise. A simple Gaussian model is derived for the multiple-access
interference giving accurate fit to the simulation results,vith appropriat
ely chosen correction terms. This approximation is then used to analyze the
performance of the network under additional tone jamming, Both cases when
the jamming tones fade and when they do not are considered.