Adaptive equalization system and method for equalizing a signal

Details Adaptive equalization system and method for equalizing a signal Adaptive equalization system and method for equalizing a signal

1991-10-10

1993-05-11

Chin, Stephen

Pulse or digital communications

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Testing

3647242, H03H 730

Patent

active

052107744

ABSTRACT:
An adaptive equalization system for allowing the equalization of a base-band line of a DCE within a predetermined range, includes an adaptive equalizer for continuously adapting its coefficients in accordance with a predetermined adaptive algorithm. The equalizer includes storage for a plurality of sets of initial coefficients for the equalization process corresponding to a plurality of telecommunication line characteristics and circuits for estimating the energy of the received signal. From the estimation of the energy of the signal on the line, there is derived one set among the plurality of sets of initial coefficients which are then used for setting the equalization before initiating the convergence process. An efficient and very simple equalization process is therefore provided which is ensured to converge whatever the characteristics of the line within the considered range.

REFERENCES:
patent: 4621366 (1986-11-01), Cain et al.
patent: 4979184 (1990-12-01), Bottoms et al.
patent: 5031193 (1991-07-01), Atkinson et al.
Patent Abstracts of Japan, vol. 15, No. 40 (E-1028) (4568) Jan. 30, 1991, and JP-A-2 277 323 (Hitachi) Nov. 13, 1990.
Patent Abstracts of Japan, vol. 11, No. 61 (E483) (2508) Feb. 25, 1987 and JP-A-61 220 547 (Fujitsu) Sep. 30, 1986.
IEEE International Conference on Communications, Toronto, Jun. 22-25, 1986, vol. 3, 1986, New York, pp. 1466-1471, Baccetti et al., "Full Digital Adaptive Equalization in 64QAM Radio Systems".

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