Bounds on Aperiodic Autocorrelation and Crosscorrelation of Binary LCZ/ZCZ Sequences(Spread Spectrum Technologies and Applications)
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概要
- 論文の詳細を見る
In order to eliminate the co-channel and multi-path interference of quasi-synchronous code division multiple access (QS-CDMA) systems, spreading sequences with low or zero correlation zone (LCZ or ZCZ) can be used. The significance of LCZ/ZCZ to QS-CDMA systems is that, even there are relative delays between the transmitted spreading sequences due to the inaccurate access synchronization and the multipath propagation, the orthogonality (or quasi-orthogonality) between the transmitted signals can still be maintained, as long as the relative delay does not exceed certain limit. In this paper, several lower bounds on the aperiodic autocorrelation and crosscorrelation of binary LCZ/ZCZ sequence set with respect to the family size, sequence length and the aperiodic low or zero correlation zone, are derived. The results show that the new bounds are tighter than previous bounds for the LCZ/ZCZ sequences.
- 社団法人電子情報通信学会の論文
- 2005-12-01
著者
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SUEHIRO Naoki
Graduate School of Systems and Information Engineering, University of Tsukuba
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Fan Pingzhi
Institute Of Mobile Communications Southwest Jiatong University
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Peng Daiyuan
Institute Of Mobile Communications Southwest Jiaotong University
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Suehiro N
Univ. Tsukuba Tsukuba‐shi Jpn
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Suehiro Naoki
Graduate School Of Systems & Information Engineering University Of Tsukuba
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Suehiro Naoki
Graduate School Of Information And System Engineering University Of Tsukuba
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FAN Pingzhi
IMC, Southwest Jiao Tong University
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Fan Pingzhi
Southwest Jiaotong Univ. Sichuan Chn
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Fan Pingzhi
Institute Of Mobile Communications Southwest Jiaotong University
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