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Volume 26 Issue 9
Sep.  2004
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Wang Wei, Xiong Jin-yu, Zhu Zhong-liang. Time Delay Estimation of Multipath in CDMA Chip[J]. Journal of Electronics & Information Technology, 2004, 26(9): 1345-1350.
Citation: Wang Wei, Xiong Jin-yu, Zhu Zhong-liang. Time Delay Estimation of Multipath in CDMA Chip[J]. Journal of Electronics & Information Technology, 2004, 26(9): 1345-1350.

Time Delay Estimation of Multipath in CDMA Chip

  • Received Date: 2003-05-18
  • Rev Recd Date: 2003-09-08
  • Publish Date: 2004-09-19
  • An effective algorithm is proposed to estimate multipath time delays in a CDMA chip under low SNR environment. Firstly, a power delay profile of multipath is constructed which can restrain effect of noise. Then the estimation algorithm that has super resolution is deduced based on the function. A detailed estimation process and analysis of the performance of this approach are given. Finally, comparsion and performance simulation demonstrate that the method can effectively estimate the delay of multipath in a CDMA chip under low SNR environment.
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  • Reed J H, et al.. An overview of the challenges and progress in meeting the E-911 requirement for location service. IEEE Communications Magzine, 1998, 36(4): 30-37. [2]Caffery J, Stuber G L. Overview of radiolocation in CDMA cellular systems. IEEE Communications Magazine, 1998, 36(4): 38-45. [3]Schmidt R O. Multiple emitter location and signal parameter estimation. IEEE Trans. on Antennas and Propagation, 1986, AP-34(3): 276-280. [4]Saarnissari H. TLS-ESPRIT in a time delay estimation. Proc. of IEEE VTC, Phoenix, USA,1997, vol.3: 1619-1623. [5]Pallas M-A, Jourdain G. Active high resolution time delay estimation for large BT signals. IEEE Trans. on Signal Processing, 1991, SP-39(4): 781-788. [6]邱天爽,王宏禹.一种基于最大熵谱估计的高分辨率时间延迟估计方法.电子科学学刊,1997,19(2):269-273. [7]Manickam T G, Vaccaro R J, Tufts D W. A least-squares algorithm for multipath time-delay estimation. IEEE Trans. on Signal Processing, 1994, 42(11): 3229-3233.[8]Yousef N, Jalloul L, Sayed A. Robust time and amplitude estimation for CDMA location finding systems. IEEE Proceeding of VTC, Amsterdam, Sept. 1999, vol.4: 2163-2167.
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