DocumentCode :
2591011
Title :
Performance improvement of spread ALOHA systems using single code
Author :
Achi, H. ; Hellany, A. ; Nagrial, M.
Author_Institution :
Sch. of Electr. Eng., Univ. of Western Sydney, Sydney, NSW
fYear :
2007
fDate :
18-20 Nov. 2007
Firstpage :
1
Lastpage :
4
Abstract :
Spread ALOHA as an advanced multiple access technique has shown several advantages over existing conventional and spread spectrum based wireless systems. Spread ALOHA is currently recognised as a simplified wireless multiple access system which provides a higher bandwidth and may accommodate high number of users. Over the last decade, several models have been developed to predict and estimate the performance of Spread ALOHA. Various combinations of protocols have been employed to enhance performance. This paper investigates the employment of a unique spreading code in conjunction with Spread ALOHA as opposed to the common method of employing distinct spreading codes for all users on the communication channel. In this paper we have modeled and simulated a Single Code Spread ALOHA (SCSA) system together with a conventional CDMA ALOHA system in order to analyse and compare the performance of both systems. Two types of PN codes were used in the simulation models, namely m-sequence and Gold codes. The simulation results showed comparable performance of both systems, and verified the suitability of m-sequence for SCSA and Gold codes for CDMA respectively.
Keywords :
code division multiple access; codes; m-sequences; spread spectrum communication; CDMA ALOHA system; Gold codes; m-sequence codes; single code spread ALOHA system; wireless multiple access system; Access protocols; Analytical models; Bandwidth; Communication channels; Employment; Gold; Multiaccess communication; Performance analysis; Predictive models; Spread spectrum communication; ALOHA; CDMA; Correlation; Probability of bit error; SCSA; SNR;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
High Capacity Optical Networks and Enabling Technologies, 2007. HONET 2007. International Symposium on
Conference_Location :
Dubai
Print_ISBN :
978-1-4244-1828-2
Electronic_ISBN :
978-1-4244-1829-9
Type :
conf
DOI :
10.1109/HONET.2007.4600268
Filename :
4600268
Link To Document :
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