Patent attributes
Receiving-apparatus employed in MIMO-system includes space-filtering-unit configured to separate receive-signals to signal of first-data-sequence and signal of second-data-sequence on basis of estimation result, provisional-decoding-unit configured to LDPC-decode signal of first-data-sequence and signal of second-data-sequence with check-matrices which is modified in different-forms by fundamental-row-operation from each other, to obtain provisional-likelihood-ratio for first-data-sequence and second-data-sequence, provisional-output-unit configured to output provisional-first-data-sequence and provisional-second-data-sequence on the basis of provisional-likelihood-ratio for first-data-sequence and second-data-sequence respectively, replica-signal-generation-unit configured to generate replica-signal, on basis of provisional-first-data-sequence and provisional-second-data-sequence and estimation-result of propagation-path-estimation-unit, soft-decision-outputting-unit configured to obtain receive-likelihood-values of first-data-sequence and second-data-sequence, on basis of residual-signal obtained by subtracting replica-signal from receive-signals, actual-decoding-unit configured to LDPC-decode receive-likelihood-values, by using the check-matrices, to obtain likelihood-ratio of first-data-sequence and likelihood-ratio of second-data-sequence, and actual-output-unit configured to obtain first-data-sequence and second-data-sequence on the basis of likelihood-ratio of first-data-sequence generated by the actual-decoding-unit and likelihood-ratio of second-data-sequence to hard-decision.
