Patent ID: 7246011
Filing Date: 2007-07-17
Classification: G01S,H04B

Abstract:
1. A signal acquisition process comprising: a) calculating a first set of correlations between a segment of a satellite signal received over a first time period and a reference signal over a set of phase offset values and carrier frequency values; b) for each of the first set of correlations that exceeds a predetermined threshold value, identifying the carrier frequency value and the phase offset value associated with that correlation; c) calculating a second set of correlations between a segment of the satellite signal received over a second time period with the reference signal using the frequency values and the phase offset values identified from the first set of correlations; d) identifying the carrier frequency value and the phase associated with each of correlations that exceed the threshold value in the second set of correlations; and e) calculating a third set of correlations between a segment of the satellite signal received over a third time period with the reference signal using the set of carrier frequency values and the phase offset values associated with the first set of correlations and the carrier frequency values and the phase offset values identified from the second set of correlations.