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:
Dec. 03, 1991
Filed:
Dec. 21, 1989
Taruna Tjahjadi, Duluth, GA (US);
Hayes Microcomputer Products, Inc., Norcross, GA (US);
Abstract
A DSP receiver for a fast turnaround modem, particularly suited for a half duplex fast turnaround modem which prevents destruction of communication channel related adaptive equalizer parameters upon loss of carrier. Upon detection of carrier loss, after sufficient time has been allowed for the last informational data bits to pass through the receiver's adaptive equalizer, the output of the equalizer's FIR filter delay line is looped back, via a multiplexer, to the input of the equalizer so that communications channel related samples are continuously provided to the equalizer to maintain the parameters at values based on the receiver's actual experience with data transmitted through the communications channel to which it is connected. A delay timer responsive to the loss of carrier signal will terminate updating of the adaptive equalizer parameters a predetermined time after loss of carrier. Alternately, detection of a standard end of data flag in the data stream will also terminate parameter update.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile