Patent ID: 9287921
Filing Date: 2016-03-15
CPC Classification: G01S,H04B

Claim Text:
1. A method for soft frame synchronization in a navigational receiver, the method comprising: computing a distance between bits of a sync pattern received by the navigational receiver and a known sync pattern; assigning a probability of detection value for the received sync pattern based on the distance; computing a confidence level for the received sync pattern using the probability of detection value; comparing the confidence level with a confidence threshold; if the confidence level is greater than or equal to the confidence threshold, updating the confidence level of the received sync pattern to generate a credibility of the sync pattern; and comparing the credibility of the received sync pattern with a predetermined credibility value and, if the credibility of the received sync pattern is greater than or equal to the predetermined credibility value, performing synchronization of the navigational receiver using the received sync pattern.