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異步移動(dòng)通信系統(tǒng)中激活用戶及其定時(shí)的聯(lián)合估計(jì)

方洋旺 焦李成 潘進(jìn) 孫紹剛

方洋旺, 焦李成, 潘進(jìn), 孫紹剛. 異步移動(dòng)通信系統(tǒng)中激活用戶及其定時(shí)的聯(lián)合估計(jì)[J]. 電子與信息學(xué)報(bào), 2002, 24(6): 735-743.
引用本文: 方洋旺, 焦李成, 潘進(jìn), 孫紹剛. 異步移動(dòng)通信系統(tǒng)中激活用戶及其定時(shí)的聯(lián)合估計(jì)[J]. 電子與信息學(xué)報(bào), 2002, 24(6): 735-743.
Fang Yangwang, Jiao Licheng, Pan Jin, Sun Shaogang . Joint estimation of active users and their timing in asynchronous CDMA systems[J]. Journal of Electronics & Information Technology, 2002, 24(6): 735-743.
Citation: Fang Yangwang, Jiao Licheng, Pan Jin, Sun Shaogang . Joint estimation of active users and their timing in asynchronous CDMA systems[J]. Journal of Electronics & Information Technology, 2002, 24(6): 735-743.

異步移動(dòng)通信系統(tǒng)中激活用戶及其定時(shí)的聯(lián)合估計(jì)

Joint estimation of active users and their timing in asynchronous CDMA systems

  • 摘要: 該文討論了異步CDMA系統(tǒng)的激活用戶數(shù)、激活用戶及其定時(shí)的聯(lián)合估計(jì)問(wèn)題。在僅知道小區(qū)內(nèi)所有注冊(cè)用戶特征序列的情況下,針對(duì)過(guò)采樣接收信號(hào)模型,應(yīng)用子空間方法來(lái)辨識(shí)激活用戶數(shù)、激活用戶并同時(shí)捕捉它們的定時(shí)。然后,分析了所提算法的特性,此方法不需要訓(xùn)練序列,理論分析與大量的仿真結(jié)果表明,此算法簡(jiǎn)單,性能優(yōu)越,能抗遠(yuǎn)近效應(yīng),最后,它還表明當(dāng)對(duì)接收信號(hào)進(jìn)行過(guò)采樣時(shí),上述算法性能有明顯的改善。
  • S. Verdu, Minimum probability of error for asynchronous Gaussian multiple-access channels, IEEE Trans. on IT, 1986, IT-32(1), 85-96.[2]M. Honig, U. Madhow, Blind adaptive multiuser detection, IEEE Trans. on IT, 1995, 41(4),944-960.[3]Xiaodong Wang, H. V. Poor, Space-time multiuser detection in multipath CDMA channels, IEEE Trans. on SP, 1999, 47(9), 2356-2374.[4]Xiaodong Wang, H. V. Poor, Blind multiuser detection: a subspace approach, IEEE Trans. on IT, 1998, 44(2), 677-690.[5]S. Ulakus, R. D. Yates, A blind adaptive decorrelating detector for CDMA systems, IEEE J. on Selected Areas in Comm., 1998, 16(8), 1530-1541.[6]Huiping Liu, Z. Siveski, Differentially coherent decorrelating detector for CDMA single-path timevarying Rayleigh fading channels, IEEE Trans. on Comm. 1999, 47(4), 590 597.[7]U. Madhow, Blind adaptive interference suppression for the near-far resistant acquisition and demodulation of direct-sequence CDMA signals, IEEE Trans. on SP, 1997, 45(1),124-136.[8]U. Madhow, MMSE interference suppression for timing acquisition and demodulation in directsequence CDMA systems, IEEE Trans. on Comm., 1998, 46(8), 1065-1075.[9]R.F. Smith, S. L. Miller, Acquisition performance of an adaptive receiver for DS-CDMA, IEEE Trans. on Comm., 1999, 47(9), 1416-1424.[10]A.N. Barbosa, S. L. Miller, Adaptive detection of DS/CDMA signals in fading channels, IEEE Trans. on Comm., 1998, 46(1), 115-124.[11]Weichiang Wu, Kwangcheng Chen, Identification of active users in synchronous CDMA multiuser detection, IEEE J. on Select. Areas Comm., 1998, 16(9), 1723-1735.[12]Kemin Li, Hui Liu, Joint channel and carrier offset estimation in CDMA communications, IEEE Trans. on SP, 1999, 47(7), 1811-1822.
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  • 收稿日期:  2000-10-08
  • 修回日期:  2001-03-27
  • 刊出日期:  2002-06-19

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