Imperial College London
Alternate

DrShaojunFeng

Faculty of Engineering, Department of Civil and Environmental Engineering

Honorary Principal Research Fellow
 
 
 
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Contact

 

s.feng

 
 
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Location

 

618Skempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Wang:2014:10.1007/s10291-013-0325-9,
author = {Wang, X and Ji, X and Feng, S},
doi = {10.1007/s10291-013-0325-9},
journal = {GPS Solutions},
pages = {243--252},
title = {A scheme for weak GPS signal acquisition aided by SINS information},
url = {http://dx.doi.org/10.1007/s10291-013-0325-9},
volume = {18},
year = {2014}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - In order to enhance the acquisition performance of global positioning system (GPS) receivers in weak signal conditions, a high-sensitivity acquisition scheme aided by strapdown inertial navigation system (SINS) information is proposed. The carrier Doppler shift and Doppler rate are pre-estimated with SINS aiding and GPS ephemeris, so that the frequency search space is reduced, and the dynamic effect on the acquisition sensitivity is mitigated effectively. Meanwhile, to eliminate the signal-to-noise ratio gain attenuation caused by data bit transitions, an optimal estimation of the unknown data bits is implemented with the Viterbi algorithm. A differential correction method is then utilized to improve the acquisition accuracy of Doppler shift and therefore to meet the requirement of carrier-tracking loop initialization. Finally, the reacquisition experiments of weak GPS signals are implemented in short signal blockage situations. The simulation results show that the proposed scheme can significantly improve the acquisition accuracy and sensitivity and shorten the reacquisition time. © 2013 Springer-Verlag Berlin Heidelberg.
AU  - Wang,X
AU  - Ji,X
AU  - Feng,S
DO  - 10.1007/s10291-013-0325-9
EP  - 252
PY  - 2014///
SN  - 1080-5370
SP  - 243
TI  - A scheme for weak GPS signal acquisition aided by SINS information
T2  - GPS Solutions
UR  - http://dx.doi.org/10.1007/s10291-013-0325-9
UR  - http://hdl.handle.net/10044/1/53918
VL  - 18
ER  -
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