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:
Apr. 25, 2006
Filed:
Oct. 24, 2001
Lawrence J. Malone, Carlsbad, CA (US);
Aaron D. Lamb, San Diego, CA (US);
Lawrence J. Malone, Carlsbad, CA (US);
Aaron D. Lamb, San Diego, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A signal detection circuit for receiving a digital baseband signal comprising an amplitude modulated symbol stream of Logic 0 symbols and Logic 1 symbols, each of the Logic 0 and Logic 1 symbols comprising S sequential samples, wherein the amplitude modulated symbol stream contains a preamble of N known symbols preceding a plurality of user data symbols. The signal detection circuit comprises: A) a signal mean determination circuit that receives G samples from the digital baseband signal and determines an amplitude mean value associated with the amplitude modulated symbol stream; and B) a correlation circuit that detects the preamble.