基于交織技術(shù)的非對(duì)稱零相關(guān)區(qū)序列偶集構(gòu)造
doi: 10.11999/JEIT150030
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1.
(西藏大學(xué)工學(xué)院 拉薩 850000) ②(西藏大學(xué)藏文信息技術(shù)研究中心 拉薩 850000) ③(電子科技大學(xué)通信抗干擾技術(shù)國(guó)家級(jí)重點(diǎn)實(shí)驗(yàn)室 成都 611731)
國(guó)家自然科學(xué)基金(61261021, 61271172)和高等學(xué)校博士學(xué)科點(diǎn)專項(xiàng)(20120185110030, 20130185130002)
Design of Asymmetric Sequence Pairs Set with Zero-Correlation Zone Based on Interleaving Technique
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1.
(School of Engineering and Technology, Tibet University, Lhasa 850000, China)
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2.
(Research Center for Tibetan Information Technology, Tibet University, Lhasa 850000, China)
The National Natural Science Foundation of China (61261021, 61271172)
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摘要: 為了抑制或者消除準(zhǔn)同步碼分多址(QS-CDMA)通信系統(tǒng)的多址干擾(MAI)、多徑干擾(MI)以及鄰小區(qū)干擾,該文提出一類非對(duì)稱零相關(guān)區(qū)(A-ZCZ)序列偶集的構(gòu)造方法?;诮o定的最佳自相關(guān)序列偶,運(yùn)用交織操作,成功設(shè)計(jì)一類非對(duì)稱零相關(guān)區(qū)序列偶集。新集合的每個(gè)子集均是零相關(guān)區(qū)序列偶集,且不同子集的序列偶間的互相關(guān)函數(shù)(CCF)具有更大的零互相關(guān)區(qū)(ZCCZ)。同時(shí),該文提出的構(gòu)造方法可以根據(jù)系統(tǒng)要求靈活地選擇子集的零相關(guān)區(qū)寬度。
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關(guān)鍵詞:
- 準(zhǔn)同步碼分多址 /
- 零相關(guān)區(qū) /
- 非對(duì)稱零相關(guān)區(qū)序列偶 /
- 最佳自相關(guān)序列偶 /
- 交織技術(shù)
Abstract: In order to eliminate the Multiple Access Interference (MAI) and Multipath Interference (MI), and avoid inter-cell interference from adjacent cells in Quasi-Synchronous Code Division Multiple Access (QS-CDMA) system, one class of asymmetric sequences pairs with Zero-Correlation Zone (ZCZ) are proposed. Based on the interleaved technique, a new Asymmetric-ZCZ (A-ZCZ) sequence pair set can be generated from a given perfect auto-correlation sequence pair. The presented A-ZCZ sequence pairs contains of multiple subsets which are the traditional ZCZ sequence pairs. The Cross-Correlation Function (CCF) between any two sequence pairs of different subsets has a wider Zero-Cross-Correlation Zone (ZCCZ). As a benefit, the ZCZ length of A-ZCZ sequence pair set can be flexibly chosen according to the requirement of the system. -
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