Subchip multipath time-delay estimation algorithm for GPS signals

被引：0
|
作者：
Mo J.-W. [1 ]
Ouyang S. [2 ]
Xiao H.-L. [2 ]
机构：
[1] School of Electronics and Engineering, Xidian Univ.
[2] Coll. of Information and Communication, Guilin Univ. of Electronics and Technology
来源：
Xi Tong Gong Cheng Yu Dian Zi Ji Shu/Systems Engineering and Electronics | 2010年 / 32卷 / 09期
关键词：
Constrained condition; Global position system (GPS); Incremental Wiener filter; Multipath time delay (MTD) estimation;
D O I：
10.3969/j.issn.1001-506X.2010.09.02
中图分类号：
学科分类号：
摘要：
To solve the estimation problem of multipath time delay (MTD) which is less than a C/A code chip in the GPS system, a new algorithm of MTD estimation based on constrained incremental Wiener filter is proposed. By utilizing the time-delay priori estimation of GPS C/A codes, the support interval and magnitude constraints are applied to the time-delay estimation and attenuation coefficient estimation in multipath impulse channels, respectively. The subchip MTD can be estimated through an iteration process of the incremental Wiener filter under the constraint conditions. Theoretical analysis and numerical simulation results show that the proposed algorithm has a low temporal and spatial complexity, fast convergence, and high resolution with low SNR.
引用
收藏
页码：1799 / 1802
页数：3
相关论文
共 12 条
  • [1] 30, 2, pp. 148-153, (2009)
  • [2] 28, 5, pp. 1094-1099, (2007)
  • [3] Wang F., Wang S., Liu Y., Time-delay estimation based on quaternion theory, Systems Engineering and Electronics, 31, 1, pp. 25-28, (2009)
  • [4] 37, 3, pp. 500-505, (2009)
  • [5] Sahmoudi M., Amin M.G., Fast iterative maximum-likelihood algorithm (FIMLA) for multipath mitigation in the next generation of GNSS receivers, IEEE Trans. on Wireless Communications, 7, 1, pp. 4362-4374, (2008)
  • [6] Korkmaz S., van der Veen A.J., Time delay estimation in dense multipath with matched subspace filters, Proc. of Positioning, Navigation and Communication, pp. 79-87, (2008)
  • [7] Liu W., Qiu T., Hu T., Robust high resolution multipath time delay estimation method, Systems Engineering and Electronics, 30, 1, pp. 41-45, (2008)
  • [8] 26, 9, pp. 1345-1350, (2004)
  • [9] 22, 5, pp. 581-585, (2004)
  • [10] Lohan E.S., Hamila R., Lakhzouri A., Et al., Highly efficient techniques for mitigating the effects of multipath propagation in DS-CDMA delay estimation, IEEE Trans. on Wireless Communications, 4, 1, pp. 149-162, (2005)
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