一级黄色片免费播放|中国黄色视频播放片|日本三级a|可以直接考播黄片影视免费一级毛片

高級(jí)搜索

留言板

尊敬的讀者、作者、審稿人, 關(guān)于本刊的投稿、審稿、編輯和出版的任何問(wèn)題, 您可以本頁(yè)添加留言。我們將盡快給您答復(fù)。謝謝您的支持!

姓名
郵箱
手機(jī)號(hào)碼
標(biāo)題
留言內(nèi)容
驗(yàn)證碼

大頻偏低信噪比條件下OFDM系統(tǒng)中的符號(hào)定時(shí)估計(jì)

劉德良,  王金龍

劉德良, 王金龍. 大頻偏低信噪比條件下OFDM系統(tǒng)中的符號(hào)定時(shí)估計(jì)[J]. 電子與信息學(xué)報(bào), 2006, 28(4): 693-697.
引用本文: 劉德良, 王金龍. 大頻偏低信噪比條件下OFDM系統(tǒng)中的符號(hào)定時(shí)估計(jì)[J]. 電子與信息學(xué)報(bào), 2006, 28(4): 693-697.
Liu De-liang, Wang Jin-long . Symbol Timing Estimation under Large Frequency Offset and Low Signal to Noise Ratio in OFDM Systems[J]. Journal of Electronics & Information Technology, 2006, 28(4): 693-697.
Citation: Liu De-liang, Wang Jin-long . Symbol Timing Estimation under Large Frequency Offset and Low Signal to Noise Ratio in OFDM Systems[J]. Journal of Electronics & Information Technology, 2006, 28(4): 693-697.

大頻偏低信噪比條件下OFDM系統(tǒng)中的符號(hào)定時(shí)估計(jì)

Symbol Timing Estimation under Large Frequency Offset and Low Signal to Noise Ratio in OFDM Systems

  • 摘要: 符號(hào)定時(shí)估計(jì)是OFDM系統(tǒng)中的關(guān)鍵問(wèn)題之一，該文就此問(wèn)題提出了一種新的基于訓(xùn)練符號(hào)的定時(shí)估計(jì)算法。研究表明，新算法的性能基本不受載波頻偏的影響，且具有很強(qiáng)的抗噪特性。通過(guò)采用這種算法可將定時(shí)誤差縮小到只有抽樣時(shí)間間隔的一半。并且，還可利用這個(gè)頻域訓(xùn)練符號(hào)來(lái)進(jìn)行載波頻偏的估計(jì)，從而只需一個(gè)訓(xùn)練符號(hào)就能完成符號(hào)定時(shí)和載波頻偏的聯(lián)合捕獲。
    Abstract: Symbol timing estimation is one of key problems in OFDM systems. In this paper a new symbol timing estimation algorithm based on a training symbol is proposed. The study shows that the new algorithm is not affected by carrier frequency offset basically, and has strong characteristic of resisting noise. Through adopting this algorithm the timing error is shortened to a half of the sample time interval. Furthermore the frequency-domain training symbol can be used to estimate carrier frequency offset, so only a training symbol is needed to complete joint acquisition of symbol timing and carrier frequency offset.
    • HTML全文
  • Choi Y S, Voltz P J, Cassara F A. ML estimation of carrier frequency offset for multicarrier signals in Rayleigh fading channels[J]. IEEE Trans. on Vehicular Technology, 2001, 50(2): 644655. .[2]van de Beek J J, B.orjesson P O. ML estimation of time and frequency offset in OFDM[J]. IEEE Trans. on Signal Processing, 1997, 45(7): 18001805. .[3]Schmidl T M, Cox D C. Robust frequency and timing synchronization for OFDM [J]. IEEE Trans. on Commun., 1997, 45(12): 16131621. .[4]Liu H, Tureli U. A high-efficiency carrier estimator for OFDM Communications. IEEE Communication Letters[J], 1998, 2(4): 104106. .[5]Han D S, Seo J H, Kim J J. Fast carrier frequency offsetcompensation in OFDM Systems[J]. IEEE Trans. on Consumer Electronics, 1999, 47(3): 364369.[6]Minn H. A simple and efficient timing offset estimation for OFDM systems[A]. Proceeding of the 51th IEEE Vehicular Technology Conference[C]. Tokyo, Japan, 2000, Vol.1: 51.55.[7]Kim Y H, Song I, Yoon S. An efficient frequency offset estimator for OFDM systems and its performance characteristics[J].IEEE Trans. on Vehicular Technology.2001, 50(5):1307-[8]馬章勇, 趙春明, 尤肖虎. 無(wú)線信道中OFDM系統(tǒng)時(shí)頻同步新算法. 通信學(xué)報(bào), 2003, 24(2): 7683. .[9]孫雪俊, 焦影, 曾虹虹. 一種新的MC-CDMA系統(tǒng)同步算法. 電子學(xué)報(bào), 2004, 29(12A): 19041907. .[10]Barbarossa S, Pompili M, Giannakis G B. Channel-independent synchronization of orthogonal frequency division access systems[J]. IEEE J. on SAC, 2002, 20(2): 474486.
  • 加載中
計(jì)量
  • 文章訪問(wèn)數(shù):  2222
  • HTML全文瀏覽量:  106
  • PDF下載量:  804
  • 被引次數(shù): 0
出版歷程
  • 收稿日期:  2004-08-01
  • 修回日期:  2005-05-07
  • 刊出日期:  2006-04-19

目錄

    /

    返回文章
    返回