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:
Jul. 08, 2008
Filed:
Oct. 01, 2004
John Robert Wiss, Carlsbad, CA (US);
Timothy Lyle Blalock, Encinitas, CA (US);
John Robert Wiss, Carlsbad, CA (US);
Timothy Lyle Blalock, Encinitas, CA (US);
L-3 Communications Titan Corporation, San Diego, CA (US);
Abstract
The signal-to-noise ratio of a demodulated received signal is estimated by measuring the error vector magnitude (EVM) of the demodulated signal; and processing the measured EVM in combination with a correction term to estimate the signal-to-noise ratio of the demodulated signal. The correction term is a polynomial function of the measured EVM. The signal-to-noise ratio is estimated in accordance with the formula: wherein {circumflex over (μ)}is the measured EVM based on the mean of a Rayleigh density of EVM measurements; and C is the correction term.