Pulse or digital communications – Repeaters – Testing
Patent
1990-09-20
1992-12-29
Chin, Stephen
Pulse or digital communications
Repeaters
Testing
333 18, 36472419, H03H 730
Patent
active
051757451
ABSTRACT:
A system of the transversal type automatic equalizer with a tap coefficient protection in which an inter-symbol interference is prevented. The system includes a summing unit for summing all of the tap powers detected by tap power detecting unit, and a determination unit for comparing the sum produced by the summing unit with a predetermined threshold value, and for producing the output determination of normal when the sum is not more than the threshold value and producing the output determination of abnormal tap coefficient growth when the sum is more than the threshold value.
REFERENCES:
patent: 4097807 (1978-06-01), Fujimura
patent: 4237554 (1980-12-01), Gitlin et al.
patent: 4243959 (1981-01-01), Duttweiler
patent: 4334313 (1982-06-01), Gitlin et al.
patent: 4376308 (1983-03-01), McNair
patent: 4384355 (1983-05-01), Werner
R. D. Gitlin et al., "The Tap-Leakage Algorithm: An Algorithm for the Stable Operation of a Digitally Implemented, Fractionally Spaced Adaptive Equalizer", The Bell System Technical Journal, vol. 61, No. 8, pp. 1817 to 1839.
R. D. Gitlin et al., "Fractionally-Spaced Equalization: An Improved Digital Transversal Equalizer", The Bell System Technical Journal, vol. 60, No. 2, pp. 275 to 296.
Kaku Takashi
Kishimoto Hiroki
Chin Stephen
Fujitsu Limited
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