Quadbit kernel function algorithm and receiver
US6690315B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2003 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Jan 31, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/021
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A Fourier transformation system usable for example in an electronic warfare radio receiver for analyzing spectral content of multiple transmitter-sourced brief duration incoming signals for characteristics including frequency component and frequency component amplitude content. The Fourier transformation system includes a plurality of approximated Kernel function values disposed at a plurality of locations about a real-imaginary coordinate axis origin and displaced from the origin by magnitudes having real and imaginary component lengths of unity and powers of two. Multiplication involving a power of two component during a Fourier transformation are achieved in a simple manner commensurate with a multiplication by unity in complexity but involving a binary number shift multiplication operation in lieu of a full fledged digital multiplication. Signal results comparisons with more simplified and more complex Kernel function approximations are also included.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.