Realization of Acquisition and Tracking Algorithms based on GPS Single Frequency Software Receiver
Ao Sun · Gnss World of China · 2011
With the simple analysis of the GPS receiver's architecture and software definition radio,acquisition and tracking algorithms for a single frequency GPS software receiver were studied,also a prototype that runs on PC was developed based on MATLAB platform.A parallel code phase search acquisition algorithm based on FFT was used to capture the satellite signals,and early-later code tracking loop and Costas phase lock loop were used to track code phase and Doppler frequency shift,respectively.Based on GPS intermediate frequency domain real data,the analysis and verification of signal acquisition and track algorithms were given.Experiments show that the simulated GPS single frequency software receiver has fundamental functions of baseband signal processing.