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Performance study of a maximum-likelihood receiver for FFH/BFSK systems with multitone jamming

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3 Author(s)
K. C. Teh ; Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore ; A. C. Kot ; K. H. Li

We derive the optimum structure of a maximum-likelihood (ML) receiver for a fast frequency-hopped binary frequency-shift-keying (FFH/BFSK) spread-spectrum (SS) communication system operating in the presence of multitone jamming (MTJ) and additive white Gaussian noise (AWGN). It is shown that the side information of noise variance, signal tone amplitude, and multiple interfering tone amplitude at each hop, as well as the computation of nonlinear modified Bessel function are required to implement the optimum ML receiver. We have also derived and analyzed two suboptimum receivers-namely, the ML-I and ML-II receivers-for large and small signal-to-noise ratio (SNR), respectively. Performance comparisons among various receivers show that the ML receiver gives the best performance, while the ML-I and ML-II receivers also outperform the other existing methods under both high and low SNR conditions

Published in:

IEEE Transactions on Communications  (Volume:47 ,  Issue: 5 )