scholarly journals Bayesian Time Delay Estimation of GNSS Signals in Dynamic Multipath Environments

2008 ◽  
Vol 2008 ◽  
pp. 1-11 ◽  
Author(s):  
Michael Lentmaier ◽  
Bernhard Krach ◽  
Patrick Robertson
Keyword(s):  
Estimation Algorithm ◽  
Time Delay Estimation ◽  
Delay Estimation ◽  
Multipath Mitigation ◽  
Movement Model ◽  
Efficient Integration ◽  
Tracking Loops ◽  
Dynamic Channel ◽  
Navigation Signals ◽  
Sequential Bayesian Estimation

A sequential Bayesian estimation algorithm for multipath mitigation is presented, with an underlying movement model that is especially designed for dynamic channel scenarios. In order to facilitate efficient integration into receiver tracking loops, it builds upon complexity reduction concepts that previously have been applied within maximum likelihood (ML) estimators. To demonstrate its capabilities under different GNSS signal conditions, simulation results are presented for both BPSK-modulated and BOC-(1,1) modulated navigation signals.

The Algorithm of Acoustic Location for Boiler Tube Leakage

2010 ◽  
Vol 97-101 ◽  
pp. 3024-3027
Author(s):  
Peng Tong ◽  
Lian Suo An ◽  
Gen Shan Jiang ◽  
Yu Qing Wang
Keyword(s):  
Time Delay ◽  
Cross Correlation ◽  
Accurate Result ◽  
Correlation Method ◽  
Estimation Algorithm ◽  
Time Delay Estimation ◽  
Delay Estimation ◽  
Value Of Time ◽  
Noise Power ◽  
Boiler Tube

The time delay estimation algorithm based on generalized cross correlation, can suppress the noise power effectively. More accurate result can be gotten by this method of time delay estimation. It is proved by simulation and experimentation that the estimated value of time delay given by generalized cross correlation method is more accurate than which is given by basic correlation method when the signal and noise ratio is stationary, thus the location result based on the time delay is more accurate.

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