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This paper presents the design procedure and implementation results for a 16 quadrature amplitude modulation (16-QAM) technique for satellite communications using an Altera digital signal processing (DSP) board. Using data pre-distortion by modifying the transmitted constellation, we can get a pure (undistorted) constellation at the output of the traveling wave tube (twt) amplifier. The results show that the symbol error rate (SER) performance can be improved significantly (about 5 dB) when data pre-

Author

Ion Capcanari

Language

EN