Patent ID: 7994977
Filing Date: 2011-08-09
Classification: G01S

Abstract:
1. A global positioning system (GPS) and Galileo system device, comprising: an input sample memory for receipt of 4fo digital signal samples of a positioning signal in a first mode or 16fo digital signal samples from a digital mixer in a second mode; a carrier generator for generation a 1023 chip spreading code when 4fo digital signal samples of a GPS signals are received and 4092 chip spreading code when 16fo digital signal samples of a Galileo signal are received; a match filter configurable for at least a ½ chip and ¼ chip match filter that match the spreading code with the digital samples from the digital sample memory; a coherent memory to store the filtered data from the match filter; a non-coherent memory for storage of non-coherent data that results from application of a fast Fourier transform to the filtered data; and a peak detector that detects data peaks by sorting the non-coherent data in the non-coherent memory and storing the detected peaks in a peak memory, where the peaks indicate the presence of a signal from a satellite vehicle.