Patent ID: 8502732

Claim:
A computer-implemented method in a component of a wireless receiver comprising: receiving an acquisition assistance (AA) message comprising information indicative of a reference location and information defining a first Doppler search window; detecting a first Doppler frequency in a first signal received from a first space vehicle (SV) at the reference location; and determining a search range defining a range of frequencies to be searched for detecting a second Doppler frequency in a second signal received at the reference location from a second SV based, at least in part, on the detected first Doppler frequency, the information defining the first Doppler search window, and a second Doppler search window, wherein determining the search range includes determining the second Doppler search window based at least in part on an estimated azimuth angle to the first SV relative to the reference location and an estimated azimuth angle to the second SV relative to the reference location, and reducing the size of the search range by selecting the smaller of the first Doppler search window and the second Doppler search window to use as the search range.