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:
Mar. 06, 1984
Filed:
Dec. 29, 1980
Robert C Davis, Indialantic, FL (US);
Gautam H Thaker, Melbourne, FL (US);
Harris Corporation, Melbourne, FL (US);
Abstract
Equalizers are commonly used in digital data signaling systems to reduce the effects of intersymbol interference on a signal received over a transmission channel. However, conventional equalizers are relatively slow due to their use of multipliers. Also, generally such equalizers are limited to providing a linear response to the received input signal samples. Accordingly, to provide a high-speed equalizer which is capable of both linear and nonlinear response, a transmission channel signal containing intersymbol interference is passed through a delay means which provides sequential Q-bit samples of said transmission channel signal. These Q-bit samples are then applied to a weighting means which includes a memory having stored equalizing weighting values which are accessed in accordance with the Q-bit samples to provide predetermined weighted output words in response to the Q-bit samples. These output words can be either linear or nonlinear with respect to the Q-bit samples. This technique serves to reduce intersymbol interference in the received signal thereby equalizing this signal. Also, since no multipliers are necessary, the equalizing operation can be carried out at a very high speed.