Performance over cascaded and band-limited nonlinear satellite channels in the presence of interference
Abstract
A comprehensive computer simulation study has been conducted to evaluate QPSK transmission performance for the nonlinear channel Intelsat V and VI type satellite communications systems. It includes all of the expected impairment mechanisms. Initially, various candidate pulse shaping filters were evaluated, which led to the verification of the suitability (channel bit error rate (BER) and high-power amplifier (HPA) spectrum spreading) of several optimum filter configurations. Two of these configurations have been recommended by other studies for Intelsat use. Using optimum filter choices, the study was then extended to determine performance sensitivity to bit rate reduction, HPA and satellite TWTA operating points, the presence or absence of co-channel interference, and the degree of up-link desired channel signal fading. Finally, a limited system channel configuration study was conducted and performance comparisons made using both computer software simulation and laboratory hardware simulation analysis techniques to verify and calibrate the software results.
- Publication:
-
ICC 1981; International Conference on Communications, Volume 3
- Pub Date:
- 1981
- Bibcode:
- 1981icc.....3...47C
- Keywords:
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- Computerized Simulation;
- Intelsat Satellites;
- Multichannel Communication;
- Nonlinear Systems;
- Phase Shift Keying;
- Transmission Efficiency;
- Cascade Control;
- Computer Programs;
- Performance Prediction;
- Power Amplifiers;
- Signal Fading;
- Traveling Wave Amplifiers;
- Uplinking;
- Communications and Radar