Receiver noise reduction with expanding gated pulses
US6788923B2 · kind B2 · utility
12Cited by
6References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 15, 2001 |
| Grant date | Sep 7, 2004 |
| Priority date | — |
| Expiry date | May 10, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/345
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A noise reducer generates a gate signal by detecting noise in a demodulated signal, and changes the lengths the gate pulses indicating the presence of noise according to the electric-field strength of a radio signal from which the demodulated signal has been obtained. The demodulated signal is modified during intervals indicated by the gate pulses, to reduce the noise. The amount of change of the gate-pulse lengths is preferably increased as the electric-field strength decreases. Noise can then be removed satisfactorily under even weak electric-field conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.