NDLI: Minimum Cross Correlation Spreading Codes

Content Provider	Springer Nature Link
Author	Farraj, Abdallah K. Amayreh, Ahmad I.
Copyright Year	2008
Abstract	Multiple access interference (MAI) appears in Code Division Multiple Access (CDMA) systems when the communication channel is a multi-path channel and the spreading codes are not orthogonal. Orthogonality between spreading codes cannot be maintained at the CDMA receiver because the codes may be asynchronous due to channel delay and multi-path spread. The receiver cannot perfectly separate the different signals of the multiple access users, and the resultant MAI limits the capacity of CDMA systems. MAI is a function of the cross correlation property between used spreading codes. In this paper we focus on the cross correlation of the spreading codes, we propose a method to find spreading codes with minimum magnitude of cross correlation. Employing these codes will reduce the resultant MAI in the CDMA system; hence it will increase the system capacity. A great enhancement is shown by comparing found minimum cross correlation spreading codes (MCCSC) with Hadamard and Gold codes.
Starting Page	385
Ending Page	394
Page Count	10
File Format	PDF
ISSN	09296212
Journal	Wireless Personal Communications
Volume Number	48
Issue Number	3
e-ISSN	1572834X
Language	English
Publisher	Springer US
Publisher Date	2008-06-04
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cross correlation CDMA Multiple access interference Spreading codes Computer Communication Networks Signal, Image and Speech Processing Communications Engineering, Networks
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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