Patent ID: 7797105
Filing Date: 2010-09-14
Classification: G01S

Abstract:
1. A method for acquisition in a satellite navigation system, comprising: providing a receiver, wherein the receiver comprises electronic hardware comprising at least a radio frequency downconverter, a tracker, and a tracking processor; receiving and amplifying radio navigation data embedded in noise, wherein receiving and amplifying are performed in the receiver; assigning a plurality of receiver channels of the tracker to search for a desired satellite, each receiver channel comprising a plurality of taps, said taps of each channel of the plurality spaced apart in time according to a desired chip spacing; extracting a range error measurement corresponding to each of said taps of the assigned plurality of channels, wherein extracting is performed by the tracking processor; extracting a velocity error measurement corresponding to each of said taps of the assigned plurality of channels, wherein extracting is performed by the tracking processor; identifying a designated tap corresponding to a maximum amplitude, wherein identifying is performed by the tracking processor, computing an offset corresponding to said designated tap, wherein computing is performed by the tracking processor; and computing a time bias based at least in part on said offset and a range residual corresponding to said designated tap, wherein computing is performed by the tracking processor.