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, 2001
Filed:
May. 05, 1999
David B. Taubenheim, Boynton Beach, FL (US);
Brian T. Kelley, Delray Beach, FL (US);
David M. Johnson, Delray Beach, FL (US);
Motorola, Schaumburg, IL (US);
Abstract
A radio receiver circuit (,) is used for receiving a multi-level signal (,) that includes a plurality of symbols, wherein each level is representative of a symbol of data. Baseband samples are generated for each symbol, whereby each baseband sample has a phase and a signal level. The radio receiver circuit (,) measures the received signal environment. A digital circuit (,) selects a scan duration from a scan duration table (,) based on the measured signal environment and a combination of signal types used for classification of the received signal. The digital circuit tallies, by category, occurrences of the baseband samples, whereby each category is representative of one of a plurality of phases, and one of a plurality of signal level ranges. The digital circuit (,) selects a set of optimized thresholds from a table of predetermined, optimized thresholds (,), based on the measured signal environment and a combination of signal types, and correlates the tallies to at least one template, and classifies the multi-level signal according to the correlation results and the selected optimized thresholds.