Title :
Throughput performance of M-ary/SSMA slotted Aloha systems
Author :
Habuchi, Hiromasa ; Hagiwara, Makoto
Author_Institution :
Inf. Processing Center, Ibaraki Univ., Hitachi, Japan
Abstract :
An M-ary/spread spectrum multiple access (M-ary/SSMA) system can achieve higher data transmission rate and can improve the bit error rate under additive white Gaussian noise (AWGN). In this paper, the M-ary/SSMA slotted Aloha system, which combines the spread Aloha system with the M-ary/SSMA system, is discussed. In particular, the throughput performance in the presence of AWGN and Rayleigh fading is analyzed. Moreover, the M-ary/SSMA slotted Aloha systems are compared with the conventional direct-sequence/spread spectrum multiple access (DS/SSMA) slotted Aloha systems. Consequently, it is found that the maximum throughput of the M-ary/SSMA slotted Aloha system is higher than that-of the conventional DS/SSMA slotted Aloha system
Keywords :
AWGN; Rayleigh channels; access protocols; data communication; error statistics; land mobile radio; multi-access systems; multiuser channels; packet radio networks; radio receivers; spread spectrum communication; wireless LAN; AWGN; BER; DS/SSMA slotted Aloha systems; M-ary/SSMA slotted Aloha systems; RAKE receiver; Rayleigh fading; additive white Gaussian noise; bit error rate; data transmission rate; direct-sequence/spread spectrum multiple access; maximum throughput; mobile communication systems; multipath fading; spread Aloha system; spread spectrum multiple access; throughput performance; wireless LAN; wireless packet communications; AWGN; Additive white noise; Bit error rate; Fading; Gaussian noise; Performance analysis; Rayleigh channels; Spread spectrum communication; Throughput; Wireless LAN;
Conference_Titel :
Global Telecommunications Conference, 1998. GLOBECOM 1998. The Bridge to Global Integration. IEEE
Conference_Location :
Sydney,NSW
Print_ISBN :
0-7803-4984-9
DOI :
10.1109/GLOCOM.1998.775833
