Threshold performance of M -ary noncoherent frequency-shift keying in non-Gaussian noise
Andreas M. Maras, H.D. Davidson, A.G.J. Holt · Electronics Letters · 1986
An expression for the error probability of M-ary noncoherent frequency-shift keying (NCFSK) for locally optimum threshold detection in non-Gaussian noise, frequently encountered in practice, is derived, which demonstrates that a significant improvement in performance can be achieved when M is greater than two.