Title :
Adaptive hybrid DS/SFH spread-spectrum multiple access communications
Author :
Eldahab, M. Abou ; Nassar, M.A. ; Fouad, M. ; El Monem Mokhtar, A.
Abstract :
The performance of coherent reception in asynchronous hybrid-direct/slow-frequency-hopped spread-spectrum multiple-access communications system operating through lognormal shadowing is investigated. System with BPSK and GMSK modulations and demodulations, as well as systems with adaptive filter (DFE) equalizer are examined and their probability of error is evaluated. Comparison of hybrid systems without and with adaptive equalizer using BPSK and GMSK modulation technique shows a considerable improvement in the performance of the system with adaptive equalizer and GMSK modulation outperform the BPSK modulation.
Keywords :
adaptive equalisers; adaptive filters; decision feedback equalisers; error statistics; fading channels; frequency hop communication; minimum shift keying; phase shift keying; spread spectrum communication; BPSK; DFE; GMSK; SSMA; adaptive equalizer; adaptive hybrid DS/SFH spread-spectrum; adaptive transversal filter; demodulation; error probability; lognormal shadowing; slow frequency-hopped communications; spread-spectrum multiple access communications; Adaptive equalizers; Adaptive filters; Binary phase shift keying; Decision feedback equalizers; Demodulation; Fading; Frequency; Radio transmitters; Shadow mapping; Spread spectrum communication;
Conference_Titel :
Radio Science Conference, 2002. (NRSC 2002). Proceedings of the Nineteenth National
Print_ISBN :
977-5031-72-9
DOI :
10.1109/NRSC.2002.1022646
