Implementation of Code and Carrier Tracking Loops for Software GPS Receivers
GPS is playing in very important role in the people’s modern mobile societies. Software approach is very flexible rather than the traditional hardware receivers. The soft-GPS receiver includes two portions: hardware and software. In hardware portion, an antenna, filter, down-converter from RF (Radio Frequency) to IF (Intermediate Frequency) and an ADC (Analog-to-Digital Converter) are included. In software portion, signal processing such as acquisition, tracking and navigation that runs on general purpose processor is included. The GPS signal is taken from N-FUELS (FUll Educational Library of Signals for Navigation) signal simulator.