US 2002/0160719 A1 · Method and apparatus for searching a gated pilot

Abstract

Techniques to search for a gated pilot reference in a wireless communication system. In one method, an overall code space in which the pilot may be found is partitioned into a number of groups of code sets, with each code set representative of all possible chip offsets of a specific PN sequence. The groups are ordered based on the likelihood of detecting the pilot in each of the groups. The groups of code sets are then used to search for the pilot, one group at a time, starting with the group most likely to result in successful pilot acquisition and ending with the group least likely to result in successful pilot acquisition. The search is terminated upon successful acquisition. The pilot search may be performed using detect, dwell, and pull-in substages. The detect substage for one group may be performed in parallel with the pull-in substage for another group.

Claims29

Dependent claims

A method of acquiring a gated pilot signal in an expanded PN space split into a plurality of N non-overlapping groups of specific pilot offsets, wherein the N groups are defined such that when PN_INC=max, a search of only a first of the N groups is necessary for acquisition of the gated pilot signal, while when PN_INC<max, a search of N or fewer groups is necessary for acquisition of the gated pilot signal, the method comprising:

if PN_INC=max, searching the first group to identify the gated pilot signal;
if PN_INC<max, searching at least the first group to identify the gated pilot signal, but fewer than N groups;
and
identifying the gated pilot signal from the searched groups.

1 more element

Dependencies are inferred from the claim text.

Method and apparatus for searching a gated pilot

Life of this patent

Method and apparatus for searching a gated pilot

Life of this patent

Abstract

Claims29