Codes for spread spectrum multiple access systems

A. G. Burr

doi:10.1109/ISSTA.1990.657737

Codes for spread spectrum multiple access systems

A. G. Burr^*

^*Corresponding author for this work

Electronic Engineering

Research output: Contribution to conference › Paper › peer-review

Abstract

This paper considers the choice of optimal codes for code division multiple access in direct sequence spread spectrum systems. In particular it questions the frequently-made assumption that codes with bounded maximum correlation, such as Gold codes and Kasami sequences, are always best in this application. The paper considers in addition to the maximum correlation the mean square correlation for various code sets, and shows that this parameter is nearly the same for all code sets considered. The performance of spread spectrum multiple access systems is then discussed, especially in terms of the signal to interference ratio, and it is shown, contrary to the original assumption, that for moderately large code lengths, the use of bounded correlation code sets does not give any increase in the maximum possible number of users.

Original language	English
Pages	109-115
Number of pages	7
DOIs	https://doi.org/10.1109/ISSTA.1990.657737
Publication status	Published - 1990
Event	1990 IEEE International Symposium on Spread Spectrum Techniques and Applications, ISSTA 1990 - London, United Kingdom Duration: 24 Sept 1990 → 26 Sept 1990

Conference

Conference	1990 IEEE International Symposium on Spread Spectrum Techniques and Applications, ISSTA 1990
Country/Territory	United Kingdom
City	London
Period	24/09/90 → 26/09/90

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© 1990 IEEE. All rights reserved.

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10.1109/ISSTA.1990.657737

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AB - This paper considers the choice of optimal codes for code division multiple access in direct sequence spread spectrum systems. In particular it questions the frequently-made assumption that codes with bounded maximum correlation, such as Gold codes and Kasami sequences, are always best in this application. The paper considers in addition to the maximum correlation the mean square correlation for various code sets, and shows that this parameter is nearly the same for all code sets considered. The performance of spread spectrum multiple access systems is then discussed, especially in terms of the signal to interference ratio, and it is shown, contrary to the original assumption, that for moderately large code lengths, the use of bounded correlation code sets does not give any increase in the maximum possible number of users.

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T2 - 1990 IEEE International Symposium on Spread Spectrum Techniques and Applications, ISSTA 1990

Y2 - 24 September 1990 through 26 September 1990

ER -

Codes for spread spectrum multiple access systems

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