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Volume 25 Issue 11
Nov.  2003
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Shen Jianfeng, Wang Zongxin . A toa estimation method with high resolution[J]. Journal of Electronics & Information Technology, 2003, 25(11): 1463-1468.
Citation: Shen Jianfeng, Wang Zongxin . A toa estimation method with high resolution[J]. Journal of Electronics & Information Technology, 2003, 25(11): 1463-1468.

A toa estimation method with high resolution

  • Received Date: 2002-05-27
  • Rev Recd Date: 2002-10-23
  • Publish Date: 2003-11-19
  • A Time-Of-Arrival(TOA) estimation method for CDMA system with high reso-lution is proposed. The integrate-dump circuits are used to sample the received signals while the sampling rate is not raised, then the Discrete-Fourier-Transform(DFT) is used to transform the discrete signals to frequency domain. Based upon the CDMA signal model, the multipath channel model and the discrete frequency spectrum of the known spreading codes, the integer part of TOA with multiples of a chip interval is estimated. Then least square method in discrete frequency domain is used to estimate the remainder fractional part of TOA. This method has the high resolution with low operation volume while the sampling rate is not high, so it is an effective and high precise TOA estimation method.
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  • A.J. Viterbi, CDMA: Principles of Spread Spectrum Communication[M], Baltimore, MD, US:Addison-Wesley Publishing Company, 1995, Chapter 3, 4.[2]T.S. Rappaport, Wireless Communication Principles and Practice[M], New Jersey, US: Prentice Hall, 1996, Chapter 6.[3]张贤达,保铮,通信信号处理[M],北京,国防工业出版社,2000,第5,13章.[4]G. Turin, Introduction to spread-spectrum antimultipath techniques and their application to urban digital radio[J], Proc. IEEE, 1980, 68(3), 328-353.[5]P. Goud, A. Sesay, M. Fattouche, A spread spectrum radio location technique and its application to cellular radio[A], Proc. IEEE Pacific Rim Conference on Communications, Computers and Signal Processing[C], Victoria, BC: ACM Press, May 1991, 661-664.[6]J. Reed, K. Krizman, B. Woerner, T. S. Rappaport, An overview of the challenges and progress in meeting the E-911 requirement for location service[J], IEEE Communications Magazine, 1998,36(4), 30-37.[7]C. Knapp, G. Carter, The generalized correlation method for estimation of time delay[J], IEEE Trans. on Acoustics, Speech, and Signal Processing, 1976, 24(8), 320-327.[8]G. C. Carter, Time delay estimation for passive sonar signal processing[J], IEEE Trans. on Acoustics, Speech, and Signal Processing, 1982, 29(3), 463-470.[9]王昕,王宗欣,用扩展Kalman滤波器计算多径下两路间时延[Jl,复旦学报(自然科学版),2000,39(2),193-200.[10]S. E. Bensley, B. Aazhang, Subspace-based channel estimation for code division multiple access communication systems[J], IEEE Trans. on Comm., 1996, 44(8), 1009-1020.[11]M. Max, A. Leshem, Joint estimation of time delays and directions of arrival of multiple reflections of a known signal[J], IEEE Trans. on Signal Proces., 1997, 45(10), 2477-2484.
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