Patent ID: 7376196

Claim:
A receiving apparatus in a multicarrier communication system for transmitting data independently via a plurality of subchannels, characterized by comprising: soft-decision target value output means for adjusting and outputting a soft-decision target value, which is the difference between the probability that data received from a subchannel of interest is one of two values and the probability that the data is the other of the two values, using soft-decision target values that have entered from receivers on other subchannels; and a decision unit for rendering a decision on receive data based upon said soft-decision target value that has been adjusted; wherein said soft-decision target value output means includes: means for calculating a soft-decision target value, which is the difference between the probability that data received from a subchannel of interest is one of two values and the probability that the data is the other of the two values; and soft-decision target value adjusting means for performing a non-linear operation using degrees of coupling with other subchannels and soft-decision target values that have entered from receivers on said other subchannels, and adjusting the soft-decision target value on said subchannel of interest subchannel by subchannel based upon results of said non-linear operation.