Diversity radio receiver automatic frequency control
US5321850A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1991 |
| Grant date | Jun 14, 1994 |
| Priority date | — |
| Expiry date | Oct 9, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/0851
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A radio-frequency receiver employing antenna diversity is provided with a plurality of antennas and a local oscillator. Individual error signals are derived from each of respective ones of signals received from the plurality of antennas. The error signals are thereafter combined in such a way as to arrive at a combined error signal having greater reliability than any one of the individual error signals taken alone. Finally, an automatic frequency control circuit is controlled using the combined error signal. Since the effect of fading on the input signal to the automatic frequency control circuit is reduced, performance of the automatic frequency control circuit is increased and the quality of radio reception is improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.