Nonlinear amplitude detector
US4298942A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 19, 1979 |
| Grant date | Nov 3, 1981 |
| Priority date | — |
| Expiry date | Dec 19, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F17/10
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.