A single-channel-per-carrier terminal for satellite communications
Abstract
An FM single-channel-per-carrier (SCPC) system is presented which offers a simple design approach capable of providing toll quality performance while reducing earth terminal cost and complexity. FM SCPC has economic and applications advantages over digital systems for the transmission of voice in satellite systems. These include lower cost, less bandwidth and/or lower satellite EIRPs. These advantages can be traded off to give more channels to a given satellite or permits use of lower G/T earth stations in a satellite system. The system described utilizes voice operated carriers, syllabic compandors, preemphasis, and special precautions taken to reduce noise contributors such as FM noise, intermodulation noise, VF circuit noise and power supply pickup. An equipment description is included explaining the electrical design considerations and physical characteristics of the terminal. Telegraph and data applications are discussed.
- Publication:
-
11th International Conference on Communications, Volume 1
- Pub Date:
- 1975
- Bibcode:
- 1975comm....1...12V
- Keywords:
-
- Channel Capacity;
- Communication Satellites;
- Frequency Modulation;
- Satellite Transmission;
- Voice Communication;
- Channels (Data Transmission);
- Data Processing Terminals;
- Echo Suppressors;
- Intermodulation;
- Multichannel Communication;
- Systems Engineering;
- Telegraph Systems;
- Communications and Radar