Patent ID: 7813437
Filing Date: 2010-10-12
Classification: H04L

Abstract:
1. A method of estimating frequency offset at a subscriber station, comprising: the subscriber station receiving a composite signal, the composite signal comprising multi-carrier signals transmitted from a plurality of base stations; the subscriber station selecting a subset of the plurality of base stations; the subscriber station selecting at least one pair of multi-carrier symbols of the composite signal, the at least one pair of multi-carrier symbols each comprising a plurality of pilot sub-carriers; the subscriber station selecting a subset of the plurality of pilot sub-carriers of the at least one pair of multi-carrier symbols based on transmit pilot symbols of the pilot sub-carriers of the multi-carrier signals transmitted by the subset of the plurality of base stations; and estimating the frequency offset based on a conjugate product between received symbols across at least one pair of multi-carrier symbols of each of the pilot sub-carriers of the selected subset of the plurality of pilot sub-carriers.