Presentation 2002/6/20
A Study on Binary Spreading Sequences Suitable for Quasi-Synchronous CDMA with Multi-Code Transmission
Masato SAITO, Heiichi YAMAMOTO,
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Abstract(in English) Multi-code transmission is one of the schemes to achieve high data rate transmission in CDMA systems. However, it causes large amount of interference because multiple sequences are used at the same time. In this paper, we propose sequence sets of spreading sequences suitable for multi-code transmission in quasi-synchronous (QS) CDMA systems. Those sets are derived from Walsh-Hadamard sequences and have 0 even cross correlations among all sequences in the sets even in asynchronous transmission. The odd cross correlation properties are also better than conventional sequence sets in QS-CDMA systems. Even though all the sequences are used, only a little amount of degradation occurs in BER performance.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) quasi-synchronous CDMA / mutlicode transmission / spreading sequence / Walsh-Hadamard sequence / cross correlation
Paper # SAT2002-32
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Committee SAT
Conference Date 2002/6/20(1days)
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Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) A Study on Binary Spreading Sequences Suitable for Quasi-Synchronous CDMA with Multi-Code Transmission
Sub Title (in English)
Keyword(1) quasi-synchronous CDMA
Keyword(2) mutlicode transmission
Keyword(3) spreading sequence
Keyword(4) Walsh-Hadamard sequence
Keyword(5) cross correlation
1st Author's Name Masato SAITO
1st Author's Affiliation Graduate School of Science and Technlogoy, NAIST()
2nd Author's Name Heiichi YAMAMOTO
2nd Author's Affiliation Graduate School of Science and Technlogoy, NAIST
Date 2002/6/20
Paper # SAT2002-32
Volume (vol) vol.102
Number (no) 145
Page pp.pp.-
#Pages 4
Date of Issue