Patent ID: 7961801

Claim:
An apparatus for transmitter identification information signal detection, suitable for an orthogonal frequency division modulation (OFDM) system and receiving a transmitter identification information signal, comprising: a correlator for conducting a cross-correlation calculation on the transmitter identification information signal and a phase reference symbol to obtain a present cross-correlation result, wherein the correlator conducts a cross-correlation calculation on the transmitter identification information signal and the phase reference symbol of every two adjacent sub-carriers; an accumulator for summing the present cross-correlation result and last (m−1) cross-correlation results obtained by respectively conducting cross-correlation calculations on the previous corresponding transmitter identification information signals and the phase reference symbols so as to obtain an accumulated cross-correlation result, wherein m is the number of the transmitter identification information signals required for obtaining the accumulated cross-correlation result; a selector for finding out a plurality of indices corresponding to a plurality of maximal values in the accumulated cross-correlation result; and a calculation unit for calculating a present main identifier and a present sub-identifier of the transmitter identification information signal according to the plurality of indices.