Patent ID: 8532027

Claim:
A method for obtaining a cell identifier in an orthogonal frequency-division multiple access (OFDMA) transmission, comprising: receiving a signal sample at a processor, wherein the signal sample comprises a primary synchronization signal (PSS) and a secondary synchronization signal (SSS); correlating at the processor each of a set of first known symbols with the PSS to generate a plurality of correlation “P” values; correlating at the processor each of a set of second known symbols with the SSS to generate a plurality of correlation “S” values; selecting at the processor a number “n” of “i” candidate phase rotations “exp(j*θ i )”, where n>1; determining at the processor a correlation “C” value for each combination of the plurality of P values with the plurality of S values at each selected candidate phase rotation, for each combination of P and S values, selecting at the processor a maximum C value “Cmax” from among the determined C values, where Cmax is equal to max n i = 1 ⁢ { abs ⁡ ( P * exp ⁡ ( j * θ i ) + S ) } ; and determining at the processor the cell identifier based at least in part on the first and second known symbols correlated with the PSS and the SSS to generate the combination of P and S values resulting in the selected C max having a maximum correlation energy.