Direct conversion FSK receiver using frequency tracking filters
US5451899A · kind A · utility
113Cited by
5References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 8, 1994 |
| Grant date | Sep 19, 1995 |
| Priority date | — |
| Expiry date | Sep 8, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/1525
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In a direct conversion receiver in which received radio frequency signals are mixed with quadrature local oscillator signals in I and Q channels, the output signals from the mixers are applied to a phase detector by way of respective frequency tracking filters to reduce the noise bandwidth and improve the sensitivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.