Title :
GPS Signal Acquisition Methods Using Sample-Based Shifting and FFT
Author :
Zhiguo, Chen ; Pei, Chen ; Chao, Han
Author_Institution :
Sch. of Astronaut., Beihang Univ., Beijing, China
Abstract :
This paper describes a GPS (Global Positioning System) signal acquisition method using sample-based shifting and FFT (Fast Fourier Transform). Before the digital IF (Intermediate Frequency) signal is processed with the correlation algorithm, an averaging algorithm is applied to reduce the FFT operation. The principle of sample-based shifting is presented and its influence on the maximum correlation value is also simulated and analyzed. The result of simulation indicates that this method can increase the maximum correlation value and reduce the number of correlation operations.
Keywords :
Global Positioning System; correlation methods; fast Fourier transforms; signal detection; signal sampling; FFT; GPS signal acquisition methods; correlation algorithm; digital IF signal; fast Fourier transform; global positioning system; intermediate frequency; sample-based shifting; Computational complexity; Correlation; Doppler effect; Global Positioning System; Simulation; Time frequency analysis; Acquisition; FFT; GPS Signal; sample-based shifting;
Conference_Titel :
Pervasive Computing Signal Processing and Applications (PCSPA), 2010 First International Conference on
Conference_Location :
Harbin
Print_ISBN :
978-1-4244-8043-2
Electronic_ISBN :
978-0-7695-4180-8
DOI :
10.1109/PCSPA.2010.248
