LS序列部分相关特性研究及其应用
doi: 10.3724/SP.J.1146.2007.01647
The Research and Application of Partial Correlation Property of LS Sequences
-
摘要: 该文研究了部分相关广义正交序列及N倍时延部分长度D0正交序列，重点对LS (Loosely Synchronized )序列的部分相关特性进行了分析。分析结果表明，LS序列具有4倍时延1/2序列长度部分相关正交特性，经过变换，可构造出基于4倍时延1/2序列长度的部分长度自互补序列和偶时延部分长度互互补序列。在此基础上，该文提出了一种将N倍时延部分长度D0正交序列应用于同步CDMA(Code Division Multiple Access)系统中的方案，可以消除系统的多址干扰。Abstract: In this paper, the generalized orthogonal sequences and N-shift partial length D0 orthogonal sequences with partial correlations are investigated. In particular, the partial correlation properties of Loosely Synchronized (LS) sequences are analyzed in details. The results show that LS sequences have partial correlation orthogonal property at 4-shift with half length, which can be utilized to construct partial length auto-complementary sequences and even-shift partial length cross-complementary sequences. Multiple-access interference can be eliminated in synchronous Code Division Multiple Access(CDMA) systems if the N-shift partial length D0 sequences are adopted.
-
Fan P Z and Darnell M. Sequence Design forCommunications Applications. RSP.[J].John Wiley Sons Ltd,London. ISBN 0-471-96557-x.1996,:-[2]Zhou Z C and Tang X H. A new class of sequences with zerocorrelation zone based on interleaved perfect sequences.Information Theory Workshop, ITW06 Cheng du, IEEEpress, 2006: 548-551.[3]Tang X H and Mow W H. Design of spreading codes forquasi-synchronous CDMA with inter-cell interference. IEEEJournal on Selected Areas in Communications. 2006, 24(1):84-93.[4]Li D B. The perspectives of large area synchronous CDMAtechnology for the fourth-generation mobile radio. IEEECommun. Mag., 2003, 41(3): 114-118.[5]Li D B. A method for spread spectrum multiple access codingwith zero correlation window. Eur. Patent, EP 1257077, Nov.2002.[6]Taki Y, Miyakawa H, and Hatori M, et al.. Even-shiftorthogonal sequences. IEEE Trans. on Inform. Theory, 1969,l(15): 295-300.[7]Paterson K G and Lothian J G. Bounds on partialcorrelations of sequences[J].IEEE Trans. on InformationTheory.1998, 44(3):1164-1175[8]Feng Lifang and Fan Pingzhi. Generalized bounds on partialaperiodic correlation of complex roots of unity sequences.International Conference on sequence design and theirapplications, Bengjing, China, 2006: 342-350.[9]Feng Lifang, Fan Pingzhi, and Suehiro Naoki. Generalizedbounds on the partial periodic correlation of complex roots ofunity sequence set. the Second International Workshop onSequence Design and Its Applications in Communications(IWSDA), Shimonoseki, Yamaguchi, Japan, 2005: 7-10. -
计量
- 文章访问数: 3389
- HTML全文浏览量: 91
- PDF下载量: 707
- 被引次数: 0
下载:
