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

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  • 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.
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  • 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
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  • 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).
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  • description.provenance : Made available in DSpace on 2012-10-19T23:45:40Z (GMT). No. of bitstreams: 1 LiuHuapingElectricalEngineeringComputerSciencePolyphaseScrambledWalsh.pdf: 222785 bytes, checksum: 9d8ac1b9d43e2d81bf0c5c48ba69accd (MD5) Previous issue date: 2012-04
  • description.provenance : Submitted by Deanne Bruner (deanne.bruner@oregonstate.edu) on 2012-10-19T23:00:15Z No. of bitstreams: 1 LiuHuapingElectricalEngineeringComputerSciencePolyphaseScrambledWalsh.pdf: 222785 bytes, checksum: 9d8ac1b9d43e2d81bf0c5c48ba69accd (MD5)
  • description.provenance : Approved for entry into archive by Deanne Bruner(deanne.bruner@oregonstate.edu) on 2012-10-19T23:45:40Z (GMT) No. of bitstreams: 1 LiuHuapingElectricalEngineeringComputerSciencePolyphaseScrambledWalsh.pdf: 222785 bytes, checksum: 9d8ac1b9d43e2d81bf0c5c48ba69accd (MD5)

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