Patent ID: 7313191

Claim:
A receiver device in a multicarrier communication system, which transmits data individually via a plurality of subchannels, the receiver device comprising: a correlator that computes correlations between two reference signals and a reception signal of a target subchannel respectively, the reference signals being generated on the basis of combinations of crosstalk coefficients that express crosstalk from another subchannel; a soft judgment target signal creation portion with a hierarchical structure rendered by forming a level- 0 cell such that a level- 0 soft judgment target signal is produced using two correlation signals inputted from the correlator and the soft judgment target signal is corrected by means of a soft judgment value of another subchannel excluding the target subchannel, forming a level- 1 cell such that a level- 1 soft judgment target signal is produced using a soft judgment target signals respectively inputted from each of two sets of level- 0 cells and the soft judgment target signal is corrected by means of a soft judgment value of another subchannel excluding the target subchannel and, subsequently, similarly, forming a level (N+1) cell by using two sets of level-N cells; and a judgment unit that outputs a soft judgment value of the target subchannel by using the soft judgment target signal outputted by the level (N+1) cell and judges the reception signal of the target subchannel on the basis of the soft judgment value.