Patent ID: 7596190
Filing Date: 2009-09-29
Classification: G01S,H04B,H04L

Abstract:
1. A method of signal reception to compensate for Doppler code shift comprising: receiving, by a receiver, an estimated code Doppler shift factor associated with a received signal; modifying information indicative of the received signal using correction information based on the estimated code Doppler shift factor to generate corrected received signal information; correlating the corrected received signal information with a generated code sequence to produce a correlation output; integrating the correlation output over an integration period to generate an output integration and compensated composite profile information indicative of a correlation strength as a function of code phase difference between the corrected received signal information and the generated code sequence; determining first peak position correction information indicative of a code phase difference corresponding to a maximum correlation power amount, the determining comprising interpolating between integrated peaks of the output integration; determining a peak drift correction in a code phase dimension using the correction information; and modifying the first peak position information based on the peak drift correction to determine second peak position information.