Title :
Performance evaluation of a coded cellular SSMA system
Author :
Van Rooyen, P.G.W. ; Kunicki, J.S.
Author_Institution :
Alcatel Altech Telecoms, Boksburg, South Africa
Abstract :
This paper investigates the performance and capacity of a cellular direct sequence spread spectrum multiple access (DS/SSMA) system. As modulation scheme coherent PSK and DPSK is assumed when the signal is corrupted by AWGN and inter user interference (IUI). Strong emphasis is placed on the performance and capacity improvements due to convolutional coding when hard decision decoding is employed. It is shown that the capacity of a SSMA system is very poor when an uncoded, non-cellular system is considered. When speech is transmitted in a coded cellular SSMA system it is shown that an increase of ten times is possible over existing TDMA systems
Keywords :
Gaussian noise; cellular radio; channel capacity; code division multiple access; convolutional codes; decoding; differential phase shift keying; phase shift keying; pseudonoise codes; radiofrequency interference; spread spectrum communication; white noise; AWGN; DS/SSMA system; coded cellular SSMA system; coherent DPSK; coherent PSK; convolutional coding; hard decision decoding; inter-user interference; performance evaluation; speech transmission; system capacity; uncoded non-cellular system; AWGN; Convolution; Convolutional codes; Decoding; Differential quadrature phase shift keying; Interference; Phase shift keying; Speech; Spread spectrum communication; Time division multiple access;
Conference_Titel :
Communications and Signal Processing, 1994. COMSIG-94., Proceedings of the 1994 IEEE South African Symposium on
Conference_Location :
Stellenbosch
Print_ISBN :
0-7803-1998-2
DOI :
10.1109/COMSIG.1994.512351
