Title :
A novel time spread mechanism to combat flat fading
Author :
Davies, E.T.J. ; Linde, L.P.
Author_Institution :
Dept. of Electr. & Electron. Eng., Pretoria Univ., South Africa
Abstract :
In this paper, a novel time spreading (TS) method is introduced for combating the deleterious effects of frequency non-selective (flat) fading channels. It is shown how this new spreading technique is able to reconcile two conflicting objectives which were identified in Wornell (1996), where a different time-spreading mechanism was introduced. The proposed technique provides significant performance gains over conventional quadrature phase-shift keying (QPSK) modulation under certain fading channel conditions
Keywords :
fading; interference suppression; time-domain analysis; time-varying channels; flat fading; frequency nonselective fading channels; performance gains; time spread mechanism; AWGN; Bandwidth; Buffer storage; Correlators; Fading; Modems; Quadrature phase shift keying; Signal sampling; Spread spectrum communication; Transmitters;
Conference_Titel :
Communications and Signal Processing, 1997. COMSIG '97., Proceedings of the 1997 South African Symposium on
Conference_Location :
Grahamstown
Print_ISBN :
0-7803-4173-2
DOI :
10.1109/COMSIG.1997.629982
