Method and apparatus for determining a quality level of an analog signal in a radio communication system
US5603088A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1995 |
| Grant date | Feb 11, 1997 |
| Priority date | — |
| Expiry date | Feb 28, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B17/309
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A radio transmitter (103) transmits a cycle (320) including a digital portion (330) generated by frequency modulating a radio carrier with a digital signal and an analog portion (440) generated by amplitude modulating a radio carrier with an analog signal. A selective call radio (106) frequency demodulates the digital signal; amplitude demodulates the analog signal; decodes a message address (510); generates a quality signal indication (643) while a quality assessment signal (420) is being received; processes an information signal (550) in response to a message received signal (641); records at least one measurement of the quality assessment signal (420) during the quality signal indication (643); determines a signal quality level of the information signal (550) from the at least one measurement of the quality assessment signal (420); and generates a sensible alert in response to the signal quality level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.