Space diversity system
US4498885A · kind A · utility
10Cited by
3References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 11, 1983 |
| Grant date | Feb 12, 1985 |
| Priority date | — |
| Expiry date | Jul 11, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/06
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A space diversity system for transmitting digital microwaves is disclosed. Each of two antennas receives a direct wave and an interference wave. The output phase of one of the two antennas is controlled to combine an output thereof with that of the other antenna, so that the interference waves cancel each other and a vector sum of the direct waves is produced as a combined output. Even if the two antenna inputs are so much alike, the combined output level and thereby the signal-to-noise ratio is prevented from being lowered whereby error in identification is eliminated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.