Polyphase Scrambled Walsh Codes for Zero-Correlation Zone Extension in QS-CDMA

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dc.creator	Choi, Kwonhue
dc.creator	Liu, Huaping
dc.date.accessioned	2012-10-19T23:45:40Z
dc.date.available	2012-10-19T23:45:40Z
dc.date.issued	2012-04
dc.identifier.citation	Kwonhue Choi, & Huaping Liu. (2012). Polyphase scrambled walsh codes for zero-correlation zone extension in QS-CDMA. IEEE Communications Letters, 16(4), 429-431. doi: 10.1109/LCOMM.2011.112311.111380	en_US
dc.identifier.uri	http://hdl.handle.net/1957/34546
dc.description	This is the author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by IEEE-Institute of Electrical and Electronics Engineers and can be found at: http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=4234. ©2012 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.	en_US
dc.description.abstract	Polyphase complex scrambling patterns are designed to extend the zero-correlation zone (ZCZ) of a family of user spreading sequences, called properly scrambled Walsh-Hadamard (PSW) codes, recently proposed for quasi-synchronous (QS) code-division multiple-access systems. The merits of the binary (ZCZ equals 2) and quadri-phase (ZCZ equals 4) PSW codes over the existing QS spreading codes are still retained in the proposed polyphase PSW codes. Scrambling patterns for the case of ZCZ of 8 are derived first. Then, the scrambling pattern design rules are generalized for greater ZCZs and a structured procedure to generate polyphase PSW codes for any ZCZ is developed. Finally, the cross-correlation properties of the proposed spreading codes are evaluated.	en_US
dc.description.sponsorship	This research was cosponsored by the Ministry of Knowledge Economy, Korea, under the Information Technology Research Center support program supervised by the National IT Industry Promotion Agency (NIPA-2011-C1090-1131-0009) and Basic Science Research Program through the National Research Foundation funded by the Ministry of Education, Science and Technology, Korea (2008-0088286).	en_US
dc.language.iso	en_US	en_US
dc.publisher	IEEE-Institute of Electrical and Electronics Engineers	en_US
dc.relation.ispartofseries	IEEE Communications Letters	en_US
dc.relation.ispartofseries	Vol. 16 no. 4	en_US
dc.subject	Quasi-synchronous CDMA	en_US
dc.subject	orthogonal spreading codes	en_US
dc.subject	zero-correlation zone (ZCZ)	en_US
dc.subject	scrambling.	en_US
dc.title	Polyphase Scrambled Walsh Codes for Zero-Correlation Zone Extension in QS-CDMA	en_US
dc.type	Article	en_US
dc.description.peerreview	yes	en_US
dc.identifier.doi	10.1109/LCOMM.2011.112311.111380