000201747 001__ 201747
000201747 005__ 20190812205807.0
000201747 037__ $$aCONF
000201747 245__ $$aAn Efficient Time-frequency Algorithm for the Weak Signal Acquisition of Modernized GNSS Signals
000201747 269__ $$a2014
000201747 260__ $$c2014
000201747 336__ $$aConference Papers
000201747 520__ $$aThe new GPS/Galileo/Compass signals use much longer code lengths and higher code frequencies than the GPS L1 C/A signal. As a result, they can provide improved ranging and anti-jamming performances. Unfortunately, their acquisition complexity is significantly higher, especially in the high sensitivity or weak signal acquisition context. Acquisition of very weak signals requires long integration times, but the integration time is often limited because of the code phase shifting induced in the receiver by an unmatched code frequency. Therefore, for the purpose of minimizing the acquisition time, a new algorithm that we named “slope parallel frequency and code searching (SPFCS)”, has been developed and is presented in this paper. This algorithm combines the parallel frequency searching and parallel code phase searching together in a novel way, and satisfies the requirements for providing standalone high sensitivity (i.e., without any network or additional sensors’ assistance). In order to assess its performance, we consider in this paper the acquisition of the GPS L5 pilot signal. Our simulation results indicate that the proposed algorithm can successfully acquire, without assistance, L5 signals as low as 15 dB-Hz with 35 kHz Doppler shifts, and a computational burden over 2 to 4 times smaller at 15 dB-Hz and 18 dB-Hz, respectively, as compared to the traditional parallel code phase search (PCS) or double block zero padding (DBZP) methods.
000201747 6531_ $$aTime-frequency Algorithm
000201747 6531_ $$aWeak Signal Acquisition
000201747 6531_ $$aModernized GNSS Signals
000201747 700__ $$0247570$$g240335$$aWang, Yanguang
000201747 700__ $$0247569$$g240329$$aTian, Jia
000201747 700__ $$0243685$$g191998$$aLeclère, Jérôme
000201747 700__ $$0243672$$g190010$$aBotteron, Cyril
000201747 700__ $$0247214$$g230886$$aCapuano, Vincenzo
000201747 700__ $$0243688$$g152066$$aFarine, Pierre-André
000201747 7112_ $$dSeptember 8-12,2014$$cTampa, Florida, USA$$aION GNSS+ 2014
000201747 773__ $$tProceedings of the 27th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2014)
000201747 8564_ $$zPostprint$$yPostprint$$uhttps://infoscience.epfl.ch/record/201747/files/An%20Efficient%20Time-frequency%20Algorithm%20for%20Weak%20Signal%20Acquisition%20of%20Modernized%20GNSS%20Signals%20-%20Infoscience%20%20version.pdf$$s976579
000201747 909C0 $$xU11964$$pESPLAB$$0252263
000201747 909CO $$ooai:infoscience.tind.io:201747$$qGLOBAL_SET$$pconf$$pSTI
000201747 917Z8 $$x240335
000201747 917Z8 $$x240335
000201747 917Z8 $$x191998
000201747 917Z8 $$x191998
000201747 917Z8 $$x191998
000201747 937__ $$aEPFL-CONF-201747
000201747 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000201747 980__ $$aCONF