| 摘要 |
<p>PHF 80-537 27-04-1981 Adaptive system in a digital data receiver providing compensation for amplitude and phase distortions introduced by a 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 which supplies a signal vector Xk, a transversal filter having N weighting coefficients, followed by a decision circuit and further a summing circuit and a multiplying circuit. To determine the N coefficients iteratively the system comprises a circuit for determining an estimated matrix Ak of the autocorrelation matrix A of the signal vectors Xk, a circuit for approximating Ak by a circulant matrix Rk, a circuit for calculating the diagonal matrix Gk whose diagonal elements are the eigenvalues of Rk, a number of calculating circuits and a circuit for up-dating the vector Ck which represents the N weighting coefficients of the filter at the instant to + kT. Use: adaptive equalizers in data modems Reference: Fig. 5</p> |
