Method for reducing scan time in a radio receiver
US6480709B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2001 |
| Grant date | Nov 12, 2002 |
| Priority date | — |
| Expiry date | Feb 24, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03J7/285
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A receiver (600) uses a scanning technique (100) to minimize scan time. An initial bandwidth setting is selected that covers multiple channel frequencies (106). A signal detection step (108) is performed looking for channel activity. As channel activity is detected, the bandwidth of a baseband filter (628) is narrowed (140, 146). The radio remains programmed to the same channel while the bandwidth is varied. Once the last signal detection with the narrowest possible bandwidth setting has been determined (144, 150, 152) the radio is programmed to that channel. Thus, more than one channel frequency is capable of being scanned without reprogramming the radio to a new channel for each scan.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.