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. 23, 1999
Filed:
Jan. 29, 1997
Michael Parr, San Diego, CA (US);
Jim Hobza, Carlsbad, CA (US);
Hughes Electronics Corporation, El Segundo, CA (US);
Abstract
A system for symbol timing maintenance in a communications receiver, in one embodiment, employs a receive channel, including a demodulator and an analog-to-digital converter for generating a plurality of samples; a symbol timing statistic generator for generating a symbol timing statistic in response to a portion of the plurality of samples; a noise estimator for generating an estimate of a noise level in response to the plurality of samples; a reception interval determiner for determining a reception interval; and a control loop for generating a signal indicative of symbol timing error. In an alternative embodiment, the system may, in addition to or instead of the noise estimator, and reception interval determiner, employ a bandwidth tuner for tuning a bandwidth of the control loop in response to the signal indicative of the symbol timing error having been generated.