Multiple user digital receiver apparatus and method with combined multiple frequency channels
US5278837A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 29, 1992 |
| Grant date | Jan 11, 1994 |
| Priority date | — |
| Expiry date | Jun 29, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B28/00
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A digital receiver apparatus and method, designed for multiple simultaneous users, digitizes a received analog RF signal and performs multiple frequency translations of the signal so that desired stations are grouped into a common frequency band separate from the remaining stations. This frequency band is then isolated, and the individual selected stations are digitally separated, demodulated and processed to provide multiple simultaneous outputs. The frequency translations are preferably performed initially on a time multiplexed basis. Isolated station separation is performed either by time multiplexing, or by the use of multiple phase or tan locked loops.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.