Date of Publication :31st December 2017

Abstract: The extension of second generation Digital Video Broadcasting (DVB-S2X) standard for the satellite broadcasting and unicasting that performs non-linear distortion cancellation for the application at the user terminal based on QPSK and 32-APSK is designed using low complexity equalizer in satellite forward link. The system is designed using MATLAB communication toolbox and built-in Simulink of version 17. The channel is designed using non-linear characteristics of TWTA, filter responses of input-multiplexing (IMUX) and output-multiplexing (OMUX) at the satellite transponder and the introduction of phase noise at the user terminal mainly focused for the applications like High Throughput-Satellite (HTS) systems. The requirements of satellite communication can make 32-APSK more suitable modulation scheme than QPSK with high quality end-to-end-transmission. Their performance is analyzed through a constellation diagram. These advances enable the shift towards more bandwidth-demanding applications and services, the adaptation to traffic demand across the coverage area, and the decrease of the cost per transmitted bit.

Reference :