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鐘控序列用作A-CDMA系統(tǒng)擴(kuò)頻碼的研究

饒妮妮,  劉聰

饒妮妮, 劉聰. 鐘控序列用作A-CDMA系統(tǒng)擴(kuò)頻碼的研究[J]. 電子與信息學(xué)報(bào), 2001, 23(2): 112-117.
引用本文: 饒妮妮, 劉聰. 鐘控序列用作A-CDMA系統(tǒng)擴(kuò)頻碼的研究[J]. 電子與信息學(xué)報(bào), 2001, 23(2): 112-117.
Rao Nini, Liu Cong. A CLASS OF CLOCK-CONTROLLED SPREADING SEQUENCES FOR A-CDMA SYSTEMS[J]. Journal of Electronics & Information Technology, 2001, 23(2): 112-117.
Citation: Rao Nini, Liu Cong. A CLASS OF CLOCK-CONTROLLED SPREADING SEQUENCES FOR A-CDMA SYSTEMS[J]. Journal of Electronics & Information Technology, 2001, 23(2): 112-117.

鐘控序列用作A-CDMA系統(tǒng)擴(kuò)頻碼的研究

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

  • 摘要: 該文提出將鐘控序列作為A-CDMA系統(tǒng)的一種新的和有潛在優(yōu)勢的擴(kuò)頻碼。首先,基于一個(gè)A-CDMA模型,建立了平均誤碼率與PN(Pseudo Noise)序列互相關(guān)參數(shù)之間的關(guān)系。提出了PN序列用作A-CDMA擴(kuò)頻碼應(yīng)該具備的條件。接著,分析了鐘控序列用作A-CDMA系統(tǒng)擴(kuò)頻碼的可行性。最后,數(shù)值結(jié)果比較了m序列和鐘控序列的互相關(guān)特性以及它們對應(yīng)的平均誤碼率。在同時(shí)工作的用戶數(shù)不多于75的情況下,證實(shí)了鐘控序列作為擴(kuò)頻碼的可行性。
    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.
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  • 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]饒妮妮,龔耀寰,KMM鐘控序列偽隨機(jī)碼特性分析,電子科技大學(xué)學(xué)報(bào),1994,23(4),363-369.[7]胡健棟等,碼分多址與個(gè)人通信,北京,人民郵電出版社,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.
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出版歷程
  • 收稿日期:  1900-01-01
  • 修回日期:  1900-01-01
  • 刊出日期:  2001-02-19

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