Optimized Processing in IMU-Aided GPS Signal Tracking

A GPS signal tracking method utilizing optimized processing in inertial measurement unit (IMU) aided GPS receiver is studied. In order to enhance the sensitivity of baseband processing, low-cost inertial sensors are applied in the GPS and strapdown inertial navigation system (SINS) integration commo...

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Bibliographic Details
Published inApplied Mechanics and Materials Vol. 157-158; pp. 62 - 65
Main Authors Hao, Yong, Guo, Li Shu, Zhao, Lin
Format Journal Article
LanguageEnglish
Published Zurich Trans Tech Publications Ltd 27.02.2012
Subjects
IMU
Signal Tracking
Doppler Frequency Shift
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Summary:A GPS signal tracking method utilizing optimized processing in inertial measurement unit (IMU) aided GPS receiver is studied. In order to enhance the sensitivity of baseband processing, low-cost inertial sensors are applied in the GPS and strapdown inertial navigation system (SINS) integration commonly, where the estimation accuracy of Doppler frequency would influence the whole performance of the tracking loops. Stochastic errors of carrier Doppler estimation caused by inertial sensors and local oscillators are corrected utilizing auto regressive moving average (ARMA) method in this paper. And then the accuracy Doppler information is used to correct the local code phase and local carrier frequency to further determine the search space of frequency domain which is unlike to the design of traditional aided loop. Simulation results indicate that the bandwidth of carrier loop and code loop could be decreased significantly in high dynamic environment.
Bibliography:Selected, peer reviewed papers from the 2011 International Conference on Mechatronics and Applied Mechanics (ICMAM 2011), December 27-28, 2011, Hong Kong
ISBN:3037853808
9783037853801
ISSN:1660-9336
1662-7482
1662-7482
DOI:10.4028/www.scientific.net/AMM.157-158.62