A new baseband linearizer for more efficient utilization of earth station amplifiers used for QPSK transmission
Abstract
The principles and applications of a new baseband linearizer are described. It is demonstrated that, with the use of this linearizer, significant improvements in the effective radiated power of the earth station high-power amplifier can be attained. In a particular example, the characteristics of the recommended INTELSAT V satellite simulator model are used. For the 120 Mbit/s QPSK transmission system operating in a complex interference environment, it is shown that with the new linearizer the earth station high-power amplifier may be operated almost in full saturation while meeting the current INTELSAT requirements. This is a significant improvement in power utilization efficiency. Similar improvements could be obtained for small digital single-channel-per-carrier earth stations.
- Publication:
-
IEEE Journal on Selected Areas in Communications
- Pub Date:
- January 1983
- Bibcode:
- 1983IJSAC...1...46G
- Keywords:
-
- Ground Stations;
- Intelsat Satellites;
- Linear Amplifiers;
- Microwave Amplifiers;
- Phase Shift Keying;
- Power Amplifiers;
- Amplifier Design;
- Computerized Simulation;
- Data Transmission;
- Digital Systems;
- Earth Terminals;
- Performance Prediction;
- Power Efficiency;
- Quadratures;
- Satellite Transmission;
- Single Channel Per Carrier Transmission;
- Systems Simulation;
- Communications and Radar