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

Title
Polyphase Scrambled Walsh Codes for Zero-Correlation Zone Extension in QS-CDMA
Author(s)
최권휴후아핑[후아핑]
Keywords
SEQUENCES
Issue Date
201204
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Citation
IEEE COMMUNICATIONS LETTERS, v.16, no.4, pp.429 - 431
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.
URI
http://hdl.handle.net/YU.REPOSITORY/28590http://dx.doi.org/10.1109/LCOMM.2011.112311.111380
ISSN
1089-7798
Appears in Collections:
공과대학 > 모바일정보통신공학과 > Articles
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