| 摘要 |
An adaptive system in a digital data receiver providing compensation for amplitude and phase distortions introduced by the data transmission channel comprises, at the output of the transmission channel (1) which produces a signal vector Xk, a transversal filter (2) with N weighting coefficients, followed by a decision circuit (3). For the direct determination of the N coefficients, the system comprises a circuit (4) for estimating the autocorrelation matrix A of the vectors Xk, a circuit (5) for approximating the estimated matrix by a circulant matrix Re+L, a circuit (6) for calculating a vector whose components are the eigenvalues of Re, a circuit (7) for estimating a vector V which expresses the correlation between the output siganls of the channel (1) and the decision circuit (3), calculating circuits (8) and (9), and a circuit (10) for estimating a vector CR which represents an approximation of the vector of the N optimum weighting coefficients of the filter. |
