The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 11, 1981
Filed:
Aug. 10, 1979
Giovanni Tamburelli, Turin, IT;
Abstract
An equalization system for eliminating precursor and postcursor interference effects from an incoming train of digital pulses comprises a cascade of decision stages interleaved with correction units emitting precursor-compensation signals to immediately following digital adders for algebraic combination with the incoming digital pulse train received thereby from a cascade of delay lines, the adders feeding the resulting precursor-compensated signals to respective decision stages. Postcursor compensation may be at least partially accomplished in a Viterbi or Ungerboeck receiver forming one of the decision stages or may be performed in an equalization cell having a correction unit transmitting postcursor-compensation signals to a digital adder inserted in the cascade of delay lines for substantially eliminating postcursor interference permanently. The cascade of decision stages may be preceded by a preshaping filter designed to reduce the amplitude of an incoming signal having a peak at an instant t(0) to a near-zero value at an instant t(0)+T, where T is the recurrence period of the incoming digital pulse train.