Patent ID: 7957475

Claim:
A Dual Carrier Modulation (DCM) demapper for two subcarriers comprising a first subcarrier and a second subcarrier, the DCM demapper comprising: a basic signal generation circuit which generates a plurality of basic signals using a received signal of the first subcarrier, channel information of the first subcarrier, a received signal of the second subcarrier, and channel information of the second subcarrier; a soft decision generation unit which generates a plurality of soft decisions using the plurality of basic signals; and a soft decision selection unit which selects a soft decision corresponding to each bit of the two subcarriers, among the generated plurality of soft decisions, wherein the basic signal generation unit generates a signal of a power difference between two channels, a first signal of a product of a conjugate of a channel gain of the first subcarrier and the received signal of the first subcarrier signal, and a second signal of a product of a conjugate of a channel gain of the second subcarrier and the received signal of the second subcarrier, and wherein the plurality of soft decisions comprise a first plurality of soft decisions and a second plurality of soft decisions, the soft decision generation unit comprises: a first soft decision generation unit which generates the first plurality of soft decisions using the signal of the power difference between the two channels and an in-phase component of the first signal and an in-phase component of the second signal; and a second soft decision generation unit which generates the second plurality of soft decisions using the signal of the power difference between the two channels and a quadrature-phase component of the first signal and a quadrature-phase component of the second signal.