System for controlling signal level at both ends of a transmission link, based upon a detected value
US5678198A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 1995 |
| Grant date | Oct 14, 1997 |
| Priority date | — |
| Expiry date | May 15, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/0298
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention is directed to a dynamic range enhancing system for increasing the dynamic range of a transmission link, characterized as either an analog or digital link. The system includes a pre-processing unit, provided at a first location, that receives, as input, a transmit signal, and a post-processing unit, provided at a second location, remote from the first location, that receives, as input, a signal transmitted over the transmission link. The pre-processing unit includes a first signal level adjusting device for adjusting a signal level of the transmit signal to be transmitted over the transmission link and a control signal maybe provided for controlling the post-processing unit, and the post-processing unit includes a second signal level adjusting device for adjusting a signal level of the adjusted transmit signal transmitted over said transmission link. The transmit signal and the control signal maybe combined and transmitted over the transmission link together so as to eliminate synchronization problems. In this arrangement the overall system gain remains substantially constant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.