Patent ID: 7657230
Filing Date: 2010-02-02
Classification: G01S,H04L

Abstract:
1. A method of detecting an interfering multi-path condition comprising: determining two or more parameters of a pulse of a correlation function derived from a received signal, wherein the correlation function is determined by fitting correlation samples based on the received signal to a predetermined function to determine coefficients of the predetermined function, the parameters comprising a peak parameter for a peak of the correlation function and an adjacent parameter for a specified time offset from the peak of the correlation function, wherein the correlation function is capable of being used in determining a position of a receiver that received the signal; determining an interpolation offset based on the peak of the correlation function and a sampled peak; determining parameters of a non-interfering hypothesis based on the interpolation offset; determining if a ratio of the peak parameter and adjacent parameter is inconsistent with the non-interfering hypothesis; and detecting an interfering multi-path condition in the received signal if the ratio is determined to be inconsistent with the non-interfering hypothesis.