Sampling function type equalizer

Details Sampling function type equalizer Sampling function type equalizer

1979-07-27

1981-10-06

Gruber, Felix D.

Pulse or digital communications

Repeaters

Testing

333 28R, 375 11, 364724, 364728, H04B 304, H03H 2100, G06F 1534

Patent

active

042939526

ABSTRACT:
In a sampling function type equalizer having a transversal filter with a plurality of potentiometers, the tap weights of the transversal filter are adjusted according to the desired values of the amplitude-frequency characteristics A.sub.p (n), and the delay-frequency characteristics .tau..sub.p (n). The first multiplication of A.sub.p (n) and the predetermined discrete function in addition to the second multiplication of said .tau..sub.p (n) and said predetermined discrete function, are performed. Also, the Bessel function is provided according to the product of the second multiplication. The first convolution integration is performed for the product of the first multiplication, the second convolution integration is performed for the output of the Bessel function, and the third convolution integration is performed between the results of said first and the second convolution integrations. The result of the third convolution integration provides the tap weights of the potentiometers of the transversal filter.

REFERENCES:
patent: 4006352 (1977-02-01), Sato
patent: 4027258 (1977-05-01), Perreault
patent: 4041418 (1977-08-01), Koeth
patent: 4071827 (1978-01-01), Kolke et al.
patent: 4097807 (1978-06-01), Fujimura
patent: 4145747 (1979-03-01), Sakaki et al.
patent: 4196405 (1980-04-01), Le Dily
Cho: Mean-Squared-Error Equalization Using Manually Adjusted Equalizers, Bell System Technical Journal, vol. 53 No. 3 May-Jun. 1974.

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