H - Electricity – 04 – L
Patent
H - Electricity
04
L
340/72
H04L 1/00 (2006.01) H04L 25/03 (2006.01)
Patent
CA 1175522
PHF 80-536 18 21-04-1981 ABSTRACT "An adaptive system in a digital data receiver providing compensation for amplitude and phase distortions introduced by the data transmission channel" 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 com- prises 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 R, a circuit (6) for calculating a vector whose components are the eigenvalues of R, a circuit (7) for estimating a vector V which expresses the correlation between the output signals of the channel (1) and the decision circuit (3), calculating circuits (8) and (9), and a circuit (10) for evaluating a vector CR which represents an approximation of the vector of the N optimum weighting coefficients of the filter. Use: adaptive data modems Reference: Fig. 5
377093
N.v. Philips Gloeilampenfabrieken
Van Steinburg C.e.
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