Method and apparatus for channel equalization

Details Method and apparatus for channel equalization Method and apparatus for channel equalization

1993-10-18

1996-01-02

Chin, Stephen

Pulse or digital communications

Equalizers

Automatic

375229, H03H 730

Patent

active

054815657

ABSTRACT:
An equalizer compensates for changing transmission characteristics of a communication channel by changing the number of prior symbols, and the value of coefficients that it uses to filter a received signal. The number of prior symbols, and the value of the coefficients are determined using a set of training symbols that are received from the communication channel.

REFERENCES:
patent: 5111481 (1992-05-01), Chen et al.
patent: 5175746 (1992-12-01), Inoue et al.
patent: 5268930 (1993-12-01), Sendyk et al.
European Search Report date Jan. 26, 1995, regarding EPO Application No. EP 94 30 7272.
"Fractionally Spaced Semi-Blind Decision Feedback Equalization of Wireless Channels" Publication date: May 23, 1993. Listed as particularly relevant if taken alone in the European Search Report regarding EP 94 30 7272.
EP-A-O 541 225 filed Sep. 9, 1992. Listed as particularly relevant if taken alone in the European Search Report regarding EP 94 30 7272.
"A Modular Approach to the Hardware Implementation of Digital Filters" Publication Date: Sep. 1976. Listed as technological background in European Search Report regarding EP 94 30 7272.
"Fractional Tap-Spacing Equalizer and Consequences for Clock Recovery in Data Modems" by G. Ungerboeck, IEEE Transactions on Communications, vol. COM-24, No. 8, Aug., 1976, pp. 856-864, New York, N.Y. 10017.

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