Patent ID: 7106810

Claim:
A demodulator circuit, wherein the demodulator circuit receives and demodulates a multi-carrier modulated (MCM) signal, and wherein the MCM signal comprises a plurality of carriers, comprising: (a) a de-mapping device, adapted to receive the MCM signal, wherein the demapping device generates decision data, comprising: (1) a channel state information (CSI) calculation device adapted to receive the MCM signal, wherein the CSI calculation device determines CSI for each carrier of the plurality of carriers and outputs an information signal comprising information regarding CSI for each carrier; and (2) a de-mapper adapted to receive the MCM signal and the information signal, operatively connected to the CSI calculation device, wherein the de-mapper uses the information signal to de-map the MCM signal, and wherein the de-mapper generates and outputs a decision data signal comprising decision data, the decision data including: a first type decision data based only on the MCM signal when the channel state information for a respective signal carrier indicates that a channel associated with the respective signal carrier is relatively good; and a second type decision data affected by the channel state information when the channel state information for the respective signal carrier indicates that the channel associated with the respective signal carrier is relatively bad; and (b) a decoder, operatively connected to the de-mapping device, wherein the decoder decodes the decision data signal.