MIMO DETECTION CONTROL APPARATUS AND MIMO DETECTION CONTROL METHOD

摘要

A MIMO detection control (multiple selection) apparatus and a MIMO detection control method wherein the arithmetic amount of MIMO detection process is reduced. In this apparatus, a number-of-matrix-conditions calculating part calculates the number of conditions of M new channel matrixes (Hi) made by sequentially removing the i-th column from channel estimation matrixes (H) each having M columns. A minimum number-of-conditions matrix selecting part selects, based on the number of conditions of the M channel matrixes (Hi), a channel matrix (Hi)(i=I, where I is a constant) having the minimum number of conditions. A transport signal estimation generating part selects, based on the I-th column of the channel matrix (HI) and that of the channel estimation matrix (H), K estimations (sI(j)) of the I-th transport signal (where 1 ≤ j ≤ K). A transport signal combining part detects, based on the I-th column of the channel matrix (HI) and that of the channel estimation matrix (H), M - 1 remaining transport signals other than the I-th transport signal, and further combines these M - 1 remaining transport signals with the estimations (sI(j)) to constitute K sets of estimation candidates, which each comprise M transport signals, for a transport signal vector (s). A likelihood comparing part selects, as an output, from among the K sets of estimation candidates, one set having the largest likelihood.