›› 2014, Vol. 34 ›› Issue (4): 66-.doi: 10.3780/j.issn.1000.758X.2014.04.010
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SU Yue, WANG Jian-Hui
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Online:
Abstract: ToimprovetheimplementationflexibilityofGNSSweaksignalacquisitioninthehighdynamicenvironments,anacquisitionalgorithmincludingtwostagefastFouriertransform(FFT)wasdeveloped.Inthefirststage,theshortcoherentintegrationtimewasemployedtodividetheDopplerfrequencyrangeintoseveralsub-rangescalledcoarseDopplerfrequencybins.Inthesecondstage,thefineDopplerfrequencysearchingwascompletedbasedontheoutputofthefirststageFFT.ThepresentedmethodcanreducethenumberofFFTpointsandtheimplementationcomplexity.Besides,thepipelineprocessingwasusedinthefirststageFFT,whichcouldincreasetheefficiencyofhardwaresource.ThesimulationresultsshowthatthepresentedmethodcanacquireweakGNSSsignalscorrectlyinhighdynamicscenarios.
Key words: WeakGNSSsignal, Navigationsignalacquisition, FastFouriertransform, Dopplerfrequency, Globalnavigationsatellitesystem
SU Yue, WANG Jian-Hui. WeakGNSSSignalsAcquisitionAlgorithmUsingTwo-stageFFT[J]. , 2014, 34(4): 66-.
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URL: http://journal26.magtechjournal.com/kjkxjs/EN/10.3780/j.issn.1000.758X.2014.04.010
http://journal26.magtechjournal.com/kjkxjs/EN/Y2014/V34/I4/66