Title :
Performance of BFSK FHMA systems with RTT side information over fading channels
Author :
Su, Ing-Jiunn ; Wu, Jingshown
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
fDate :
12/1/1999 12:00:00 AM
Abstract :
The performance of frequency-hopping multiple-access systems with side information and binary frequency-shift keying signaling is evaluated. The side information is generated by Viterbi´s ratio threshold test (RTT). Both synchronous and asynchronous hopping systems over fading channels are examined. The system with RTT side information performs significantly better than that with perfect side information or hard decision. Compared with hard decision, the RTT side information provides more than 20% improvement in capacity for Eb/N0 =10 dB over Rayleigh channels. Also, we find that the optimum threshold in the RTT scheme should be dynamically adjusted with the number of simultaneous users in the system
Keywords :
Rayleigh channels; Viterbi detection; channel capacity; frequency hop communication; frequency shift keying; multi-access systems; telecommunication signalling; BFSK FHMA systems; RTT detection scheme; RTT side information; Rayleigh channels; Viterbi ratio threshold test; asynchronous hopping systems; binary frequency-shift keying signaling; channel capacity; fading channels; frequency-hopping multiple-access systems; hard decision; optimum threshold; perfect side information; performance evaluation; synchronous hopping systems; AWGN; Envelope detectors; Fading; Frequency shift keying; Interference; Random variables; Rayleigh channels; Rician channels; Signal analysis; Testing;
Journal_Title :
Communications, IEEE Transactions on
