| 摘要 |
An impluse response h<SUB>mn</SUB>(q) of each transmission path is estimated from N received signals r<SUB>m </SUB>(m=1, . . . , M) and a known signal (for a number of users equal to N, n=1, . . . , N). MxN matrix H (q) having h<SUB>mn</SUB>(q) as an element and a QxQ matrix H having H(q) as an element are determined (where Q represents a number of multipaths of each transmitted wave and q=0, . . . , Q-1). A soft decision value b'<SUB>n</SUB>(k) is determined from decoded lambda<SUB>2 </SUB>[b<SUB>n</SUB>(k)], and this is used to generate an interference component matrix B'(k) to generate an interference replica H.B'(k). The interference replica H.B'(k) is subtracted from a received matrix y(k) to determine y'(k). y(k) and H are used to determine an adaptive filter coefficient w<SUB>n</SUB>(k) to be applied to an n-th user in order to eliminate residual interference components in y'(k) according to the minimum mean square error criteria. y(k) is passed through w<SUB>n</SUB>(k) to provide a log-likelihood ratio as a received signal from the user n from which interferences are eliminated.
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