Title :
(L,K) CDMA/aloha multiple-access system
Author :
Alrumaih, Rumaih M. ; Alsugair, Abdulaziz A.
Author_Institution :
King Abdulaziz City for Sci. & Technol., Riyadh, Saudi Arabia
fDate :
29 Jun-4 Jul 1997
Abstract :
The performance of the noisy slotted aloha random-access system in combination with L-out-of-K (L,K) code division multiple-access (CDMA) is discussed. A model is formulated based on the philosophy that collisions among few users are handled by the CDMA codes and collisions among many users are resolved by the aloha system. We show that for a lower signal-to-noise ratio (SNR), the hybrid system performs better than the conventional aloha scheme. Also, smaller (L,K) CDMA codes give superior results over larger codes
Keywords :
access protocols; code division multiple access; noise; random processes; (L,K) CDMA/aloha multiple-access system; CDMA codes; L-out-of-K code division multiple-access; collisions; hybrid system; noisy slotted aloha random-access system; performance; signal-to-noise ratio; Additive white noise; Bandwidth; Channel capacity; Cities and towns; Feedback; Gaussian noise; Multiaccess communication; Signal resolution; Signal to noise ratio; Throughput;
Conference_Titel :
Information Theory. 1997. Proceedings., 1997 IEEE International Symposium on
Conference_Location :
Ulm
Print_ISBN :
0-7803-3956-8
DOI :
10.1109/ISIT.1997.612968
