Maximum-Likelihood Receivers for FFH/BFSK Systems with Multitone Jamming over Frequency-Selective Rayleigh Fading Channels

• Main Authors: Tsan-Ming Wu, Po-Chin Hung
• Format: Conference Proceeding
• Language: English
• Subjects: Additive white noise; AWGN; Communication systems; Computer errors; Computer simulation; Fading; Frequency diversity; Jamming; Numerical analysis; Spread spectrum communication
• ISSN: 1550-3607; 1938-1883
• DOI: 10.1109/ICC.2007.139

In this paper, we have investigated the maximum-likelihood (ML) receivers for the fast frequency-hopped binary frequency-shift-keying (FFH/BFSK) spread-spectrum communications system with a worst case multitone jamming (MTJ) and additive white Gaussian noise (AWGN) over frequency-selective Rayleigh fading channels. Owing to the fact that the analysis of the natural logarithm of the modified Bessel function is intractable, two ML diversity-combining receivers, that are named as ML-A and ML-B receivers according to the different conditions of the approximation, have been analyzed theoretically based upon a correlated two-path frequency-selective channel model. The performance of these two receivers compared with that of other diversity-combining receivers in terms of the bit error rate(BER) has been scrutinized. Computer simulations confirm that our numerical analyses are valid. Furthermore, the ML-B receiver outperforms other receivers, while the ML-A receiver is only as good as the ML-B counterpart when the signal-to-jamming ratio (SJR) is greater than 24 dB.