Patent ID: 7916800

Claim:
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 comprising a first multi-carrier signal including a plurality of first multi-carrier pilot sub-carriers, and a second multi-carrier signal including a plurality of second multi-carrier pilot sub-carriers; the subscriber station selecting at least one group of the plurality of first multi-carrier pilot sub-carriers within 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; estimating the frequency offset based on a complex conjugate product between a linear combination of received pilot symbols of the at least one group of the plurality of sub-carriers of a first multi-carrier symbol of the pair of multi-carrier symbols and a linear combination of received pilot symbols of the at least one group of the plurality of sub-carriers of a second multi-carrier symbol of the pair of multi-carrier symbols.