Pulse or digital communications – Equalizers – Automatic
Patent
1993-03-03
1995-05-23
Chin, Stephen
Pulse or digital communications
Equalizers
Automatic
375231, 333 28R, 3647242, H03H 730, H03H 740
Patent
active
054188172
ABSTRACT:
Adaptive equalization system for allowing the equalization of a base-band line of a DCE, includes an adaptive filter for adjusting its coefficients in accordance with an adaptive algorithm. The equalizer includes controls to work during a preliminary period, in an adaptive or non-adaptive mode according to the convergence of the recursive algorithm process. The algorithm is triggered depending on whether the equalized signal belongs to one of several predefined intervals of convergence. After this preliminary period, when the mean square of the residual error is considered small enough to ensure the convergence of the adaptive process, the algorithm is computed on a continuous mode.
REFERENCES:
patent: 4141072 (1979-02-01), Perreault
patent: 4475211 (1984-10-01), Mattis, Jr. et al.
patent: 4759036 (1988-07-01), Meyers
patent: 4989170 (1991-01-01), Batruni et al.
patent: 5159609 (1992-10-01), Palicot
patent: 5214670 (1993-05-01), Ballatore
"Synchronous and Fractionally-Spaced Blind Equalization in Dually-Polarized Digital Radio Links" by R. Raheli and G. Picchi, IEEE International Conference on Communications-ICC'91, Denver, Jun. 23-26, 1991, vol. 1, pp. 156-161.
"Stop-and-Go" Decision Directed Algorithm for Joint Blind Equalization and Carrier Recovery by G. Picchi and G. Prati, IEEE Global Telecommunications Conference, Houston, Tex., Dec. 1-4, 1986, Conference Record, vol. 3, pp. 1646-1651.
Chin Stephen
International Business Machines - Corporation
Le Amanda T.
Timar John J.
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