Title :
Coding for FFH-CDMA systems
Author :
de Deus, G.A. ; Portugheis, Jaime
Author_Institution :
DECOM, UNICAMP, Campinas, Brazil
Abstract :
This paper addresses the design of coded FFH-CDMA systems in a mobile radio environment. We show that hard limiting of detector outputs can significantly degrade the capacity of these systems. We also show that the main system design criterion is maximization of symbol Hamming distance. Analytical and simulation results corroborated the effectiveness of the proposed design criterion.
Keywords :
code division multiple access; encoding; frequency hop communication; land mobile radio; multiuser channels; code division multiple-access; coded FFH-CDMA systems; coding; detector output hard limiting; fast frequency-hopping; mobile radio; simulation results; symbol Hamming distance maximization; system capacity; system design criterion; Decoding; Degradation; Detectors; Fading; Frequency shift keying; Hamming distance; Land mobile radio; Machine vision; Maximum likelihood detection; Telephony;
Conference_Titel :
Information Theory, 2002. Proceedings. 2002 IEEE International Symposium on
Print_ISBN :
0-7803-7501-7
DOI :
10.1109/ISIT.2002.1023608
