钟控序列用作A-CDMA系统扩频码的研究

饶妮妮; 刘聪

钟控序列用作A-CDMA系统扩频码的研究

饶妮妮^①;刘聪,
刘聪

计量
- 文章访问数: 1911
- HTML全文浏览量: 81
- PDF下载量: 485
- 被引次数: 0
出版历程
- 收稿日期: 1900-01-01
- 修回日期: 1900-01-01
- 刊出日期: 2001-02-19

A CLASS OF CLOCK-CONTROLLED SPREADING SEQUENCES FOR A-CDMA SYSTEMS

Rao Nini^①;刘聪,
Liu Cong

摘要

摘要: 该文提出将钟控序列作为A-CDMA系统的一种新的和有潜在优势的扩频码。首先,基于一个A-CDMA模型,建立了平均误码率与PN(Pseudo Noise)序列互相关参数之间的关系。提出了PN序列用作A-CDMA扩频码应该具备的条件。接着,分析了钟控序列用作A-CDMA系统扩频码的可行性。最后,数值结果比较了m序列和钟控序列的互相关特性以及它们对应的平均误码率。在同时工作的用户数不多于75的情况下,证实了钟控序列作为扩频码的可行性。
- A-CDMA; 钟控序列; 互相关; 平均误码率
Abstract: In this paper, the clock-controlled sequence is presented as a potentially superior spreading code for A-CDMA systems. First, on the basis of an A-CDMA system modei, the relationship between the average bit error probability and the cross-correlation parameters of the PN (Pseudo Noise) sequences is established. The conditions, which the PN sequences as spreading codes should satisfy, are derived from the above relationship. Next, the feasibility of the clock-controlled sequences as the spreading codes for an A-CDMA system are analyzed systematically. Finally, the cross-correlation functions between m-sequence and clock-controlled sequence, as well as the average bit error probability (BEP) corresponding to both sequences under various user number, are compared in numerical results. The feasibility of the clock- controlled sequences as spreading codes is thus verified when U75.

HTML全文

参考文献(1)

M.B.Pursley, H. F. Roefs, Numerical aluation of correlation parameters for ptimal phases of binary shift-register sequences, IEEE Trans. On COM, 1979, COM-27(10),1597-1604.[2]R. Gold, Optimal binary sequences for pread spectrum multiplexing, IEEE Trans. On T,1967,IT-13(4),619-621. [3]A.H.Kemp,S.J.Shepherd,S.K.Barton,Multi-function coding and modulation for spread spectrum and CDMA with inherent security, In Communication Signal Processing and Coding Annual Conference, Sheffield,1996,233-241.[3]A.H.Kemp,S.J.Shepherd,S.K.Barton,Multi-function coding and modulation for spread spectrum and CDMA with inherent security, In Communication Signal Processing and Coding Annual Conference, Sheffield,1996,233-241.[4]Xu Duan Lin,Kyung Hi Chang,Optimal PN sequence design for quansisynchronous CDMA communication systems, IEEE Trans. On COM,1997,COM-45(2),221-226.[5]N.Suehiro,M.Hatori,Modulatable orthogonal sequences and their application to SSMA systems,IEEE Trans.on IT,1988,IT-34(1),93-100.[6]饶妮妮,龚耀寰,KMM钟控序列伪随机码特性分析,电子科技大学学报,1994,23(4),363-369.[7]胡健栋等,码分多址与个人通信,北京,人民邮电出版社,1996年10月,90-134.[8]M.B.Pursley,D.V.Sarwate,Error probabilities for direct sequence spread spectrum multiple access communication systems, IEEE Trans. On COM, 1982, COM-30(5),975-984.[9]C.G.Gunther,A generator of pseudo-random sequences with clock controlled linear feedback shift-registers, Advances in Cryptology of EUROCRYPT87, Extend Abstract, I-1-I-4.

施引文献

资源附件(0)

访问统计