NEC's traffic terminal equipment for the Intelsat TDMA system
Abstract
The components of the traffic terminal equipment (TTE) for the Intelsat TDMA system are discussed. The TTE consists of: (1) common TDMA terminal equipment (CTTE), (2) DSI equipment, and (3) an operation and maintenance center (OMC). The CTTE contains two BASIC CTTE controllers and two QPSK modems; their composition and functions are described. The DSI equipment contains numerous DSI/digital noninterpolation (DNI) units, which use four microprocessors and two types of speech detectors to provide dynamic signal mapping between incoming and outgoing channels and reliable speech detection. A description of the DSI/DNI units, the microprocessors, and speech detectors is presented. The OMC is the man-machine interface for all the TTE. The functions of the OMC, which is composed of a minicomputer system and a status, alarm control (SAC) panel, are explained.
- Publication:
-
International Journal of Satellite Communications
- Pub Date:
- June 1985
- Bibcode:
- 1985IJSC....3..101S
- Keywords:
-
- Communication Equipment;
- Digital Systems;
- Earth Terminals;
- Intelsat Satellites;
- Network Control;
- Time Division Multiple Access;
- Controllers;
- Data Transmission;
- Maintenance;
- Modems;
- Phase Shift Keying;
- Electronics and Electrical Engineering