Spectrally efficient and high capacity acknowledgement radio paging system
US5625880A · kind A · utility
70Cited by
14References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1994 |
| Grant date | Apr 29, 1997 |
| Priority date | — |
| Expiry date | Aug 1, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S5/12
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An improved radio paging system providing automatic acknowledgment of message delivery, including a base station with spatially directive reception means and a pager capable of transmitting acknowledgment signals. The spatially directive reception means at the base station enhances the reception quality of the acknowledgment signals transmitted by the pager over that obtainable with conventional omnidirectional reception means, thereby compensating for the disparity in the base station and pager transmission powers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.