Patent ID: 8385446

Claim:
An apparatus for detecting signals in a wireless communication system of a Single-Carrier (SC) transmission scheme, the apparatus comprising: at least two antennas configured to receive signals; at least two Orthogonal Frequency Division Multiplexing (OFDM) demodulators configured to convert the signals received through the respective antennas into frequency domain signals; at least two subcarrier mappers configured to confirm signals mapped to frequency domain subcarriers allocated to the respective antennas in the frequency domain signals received from the respective OFDM demodulators; at least two OFDM modulators configured to convert the signals received from the respective subcarrier mappers into time domain signals; and a detector comprising: a channel estimator configured to estimate a channel through the time domain signals; a set constructor configured to construct at least one set for candidate transmission symbols that the transmit end can transmit on the basis of the channel estimated in the channel estimator; a trellis constructor configured to construct trellises of the candidate transmission symbols receivable from the transmit end depending on multipath fading, using the at least one set; and a selector configured to select as a symbol for a receive signal, a trellis whose error with the receive signal is least among the trellises constructed in the trellis constructor, wherein the detector is configured to detect receive signals through Maximum Likelihood (ML) detection using the set.