Patent ID: 8976844
Filing Date: 2015-03-10
Classification: G01S,H04B

Abstract:
1. A method for processing a non-coherent signal modulated by a plurality of codes, said method comprising: receiving the non-coherent signal at a receiver, wherein the non-coherent signal includes a global positioning system (GPS) signal; determining a timing of transitions between symbol states of the non-coherent signal using a numerical analysis of second difference of the non-coherent signal; identifying the symbol states based on a constellation chart for the non-coherent signal, wherein each signal state of the non-coherent signal is integrated using an integrate filter; and filtering the non-coherent signal based on a known chip rate of one of the plurality of codes to separate the one of the plurality of codes from the symbol states using a matched time window filter configured for the known chip rate of the one of the plurality of codes.