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一種TD-SCDMA載波頻偏與信道聯(lián)合估計算法

石璟,  張朝陽,  儲珊,  來萍,  仇佩亮

石璟, 張朝陽, 儲珊, 來萍, 仇佩亮. 一種TD-SCDMA載波頻偏與信道聯(lián)合估計算法[J]. 電子與信息學(xué)報, 2006, 28(11): 2099-2102.
引用本文: 石璟, 張朝陽, 儲珊, 來萍, 仇佩亮. 一種TD-SCDMA載波頻偏與信道聯(lián)合估計算法[J]. 電子與信息學(xué)報, 2006, 28(11): 2099-2102.
Shi Jing, Zhang Zhao-yang, Chu Shan, Lai Ping, Qiu Pei-liang. A Channel and Carrier Frequency Offset Joint Estimation Algorithm for TD-SCDMA[J]. Journal of Electronics & Information Technology, 2006, 28(11): 2099-2102.
Citation: Shi Jing, Zhang Zhao-yang, Chu Shan, Lai Ping, Qiu Pei-liang. A Channel and Carrier Frequency Offset Joint Estimation Algorithm for TD-SCDMA[J]. Journal of Electronics & Information Technology, 2006, 28(11): 2099-2102.

一種TD-SCDMA載波頻偏與信道聯(lián)合估計算法

A Channel and Carrier Frequency Offset Joint Estimation Algorithm for TD-SCDMA

  • 摘要: 通過分析時分同步碼分多址(TD-SCDMA)系統(tǒng)的載波頻偏和信道特性，提出一種頻偏與信道聯(lián)合估計算法。該算法通過對訓(xùn)練序列部分相關(guān)，然后做差分將頻偏和信道特性解耦，并通過逐次迭代最終精確估計出頻偏和信道參數(shù)。仿真結(jié)果表明，算法頻偏估計性能接近Cramr-Rao界，準(zhǔn)確度較高；全鏈路仿真誤碼率性能優(yōu)越，信道估計準(zhǔn)確。算法復(fù)雜度不高，實用性強(qiáng)，同樣適用于其它的TDD模式的CDMA系統(tǒng)。
    Abstract: An algorithm of channel and carrier frequency offset joint estimation is proposed in this paper with analyzing the characteristic of carrier frequency offset and wireless channel in Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) system. Frequency offset and channel parameters can be uncoupled by means of partly correlating the training sequence and calculating difference, then they are estimated accurately through iteration. Simulation results show that the proposed algorithm performs quite well in both frequency offset and channel estimation. The frequency offset estimation performance is closed to Cramr-Rao bound, and the link performance is good. The proposed method has low complexity and strong practicability. It can be used in other Time Division Duplex (TDD) CDMA systems.
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  • Mauss Oliver C, Classen Ferdinand, Meyr Heinrich. Carrier frequency recovery for a fully digital direct-sequence spread-spectrum receiver: A Comparison[A]. Vehicular Technology Conference [C]. Meadowlands Hilton, Secaucus, NJ, USA: IEEE, 1993: 392-395.[2]Morelli Michele. Frequency estimation for the downlink of the UMTS-TDD component. [J], IEEE Trans. on Wireless Comunications. 2002, 1(4): 554-557.[3][3] 3Gpp TS 25.221 v4.7.0(2002-12), Physical channels and mapping of transport channels onto physical channels (TDD) [S].[4][4] 3Gpp TS 25.945 v4.0.0 (2001-03), RF requirements for 1.28 Mcps UTRA TDD option [S].[5]李小文，李貴勇，陳賢亮等. TD-SCDMA第三代移動通信系統(tǒng)、信令及實現(xiàn)[M]. 北京: 人民郵電出版社, 2003: 128-129.[6][6] 3GPP TS 25.102 V4.7.0 (2002-12) UE Radio Transmission and Reception (TDD)[S].[7]Morelli Michele, Mengali Umberto. Carrier-frequency estimation for transmissions over selective channels [J].IEEE Trans. on Communications.2000, 48(9):1580-1589
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出版歷程
  • 收稿日期:  2005-02-28
  • 修回日期:  2005-11-24
  • 刊出日期:  2006-11-19

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