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UKSim 2009: 11th International Conference on Computer Modelling and Simulation
A Novel Threshold Setting Method for FFT-based GPS Acquisition
March 25-March 27
ISBN: 978-0-7695-3593-7
| ASCII Text | x | ||
| X.L. Cao, R.Z. Mu, Y.P. Yan, "A Novel Threshold Setting Method for FFT-based GPS Acquisition," Computer Modeling and Simulation, International Conference on, pp. 497-501, UKSim 2009: 11th International Conference on Computer Modelling and Simulation, 2009. | |||
| BibTex | x | ||
| @article{ 10.1109/UKSIM.2009.72, author = {X.L. Cao and R.Z. Mu and Y.P. Yan}, title = {A Novel Threshold Setting Method for FFT-based GPS Acquisition}, journal ={Computer Modeling and Simulation, International Conference on}, volume = {0}, year = {2009}, isbn = {978-0-7695-3593-7}, pages = {497-501}, doi = {http://doi.ieeecomputersociety.org/10.1109/UKSIM.2009.72}, publisher = {IEEE Computer Society}, address = {Los Alamitos, CA, USA}, } | |||
| RefWorks Procite/RefMan/Endnote | x | ||
| TY - CONF JO - Computer Modeling and Simulation, International Conference on TI - A Novel Threshold Setting Method for FFT-based GPS Acquisition SN - 978-0-7695-3593-7 SP497 EP501 A1 - X.L. Cao, A1 - R.Z. Mu, A1 - Y.P. Yan, PY - 2009 KW - acquisition KW - FFT KW - GPS KW - PMF KW - threshold VL - 0 JA - Computer Modeling and Simulation, International Conference on ER - | |||
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/UKSIM.2009.72
A FFT-based partial matched filter (PMF) acquisition threshold setting method for fast GPS acquisition is presented. Normal distribution and numerical fitting technique instead of real decision variable (DV) distribution are used in derivation to approximate the threshold expression, and the modification method for the threshold expression is also presented. The threshold expression is based on the individual FFT Doppler bin false alarm probability rather than the convention whole detector false alarm probability. The proposed threshold expression can be adjusted according to the false alarm probability, the noncoherent accumulation (NCA) length and the estimated noise variance. Additionally, how to select the optimal FFT point number is discussed. Furthermore we discuss the implementation of zero-padding FFT with its advantage and limitation. The performance is superior compared to the reference method in terms of signal-to-noise ratio (SNR) when detection and false alarm probabilities are used as measurement criteria.
Index Terms:
acquisition, FFT, GPS, PMF, threshold
Citation:
X.L. Cao, R.Z. Mu, Y.P. Yan, "A Novel Threshold Setting Method for FFT-based GPS Acquisition," uksim, pp.497-501, UKSim 2009: 11th International Conference on Computer Modelling and Simulation, 2009
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