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:
Nov. 03, 1981
Filed:
Dec. 19, 1979
Henry E Lee, Columbia, MD (US);
Abstract
A nonlinear amplitude detector generates signal amplitude from the signal's inphase and quadrature components based on a Binomial series expansion. The amplitude detector significantly reduces the processing requirement from an ideal square root operation and yet provides much improved error performance over a conventionally used linear amplitude detector. In operation, the inphase and quadrature signal components are compared for relative magnitude and the smaller magnitude signal component is squared and divided by the large magnitude signal component. The quotient from this operation is multiplied by a coefficient that is selected to provide desired amplitude error deviation characteristics. Signal amplitude is then determined by summing this product with the larger magnitude signal component.