Title :
Theoretical analysis of M-ary/SSMA systems utilizing multicarrier techniques
Author :
Habuchi, Hiromasa ; Arai, Tsuyoshi
Author_Institution :
Dept. of Comput. & Inf. Sci., Ibaraki Univ., Hitachi, Japan
Abstract :
In this paper, M-ary spread spectrum multiple access (M-ary/SSMA) communication systems utilizing multicarrier techniques are evaluated by theoretical analysis. The multiple access capability of the multicarrier M-ary/SS system is evaluated by theoretical analysis in the presence of frequency selective fading and partial band interference. Moreover, the multicarrier M-ary/SS system is compared with the multicarrier direct-sequence spread-spectrum (multicarrier DS/SS) system. As a result, the BER of the multicarrier M-ary/SSMA system is better than that of the multicarrier DS/SSMA system when the number of users is small and Eb/N0 is low. The BER of the multicarrier M-ary/SSMA system can he improved by increasing the number of carriers. Moreover the multicarrier M-ary/SSMA system is superior to the single carrier M-ary/SSMA system using a RAKE receiver in the presence of narrowband interference
Keywords :
Gaussian channels; Rayleigh channels; error statistics; fading; interference (signal); modulation; multi-access systems; spread spectrum communication; AWGN channel; BER; M-ary spread spectrum multiple access; M-ary/SSMA systems; RAKE receiver; SSMA; carrier numbers; frequency selective fading; multicarrier techniques; narrowband interference; partial band interference; users number; AWGN; Bandwidth; Bit error rate; Communication systems; Fading; Interference; Multiaccess communication; Multipath channels; Narrowband; Spread spectrum communication;
Conference_Titel :
Information, Communications and Signal Processing, 1997. ICICS., Proceedings of 1997 International Conference on
Print_ISBN :
0-7803-3676-3
DOI :
10.1109/ICICS.1997.647062
