Patent ID: 8014472

Claim:
A method comprising: receiving a plurality of symbols; observing a plurality of data samples in adjacent symbols; and calculating, in a calculator, an estimate of an integer portion of a carrier frequency offset based on a cyclic shift and a phase shift of the data samples between symbols, wherein calculating the estimate comprises calculating sum values corresponding to respective symbol indices, wherein each of the sum values is based on a summation of max values that correspond to respective data subcarrier indices, the max values being based on a maximum of (i) an absolute value of a real component of a base value and (ii) an absolute value of an imaginary component of the base value, wherein the base value is based on a multiplication of e −j2πnα and at least one of the data samples, wherein n is a symbol index of the symbol indices, and wherein α is a cyclic prefix width ratio, wherein the symbols comprise Orthogonal Frequency Division Multiplexing (OFDM) symbols, and the plurality of data samples correspond to a plurality of data subcarriers in the OFDM symbols.