Performance Enhancement of FEC Code For DVB-T2 System by Using Rotated Constellations

This paper deals with the rotated constellations technique's performance, which results in additional diversity to enhance Bit Interleaved Coding and Modulation (BICM) in various fading channel environments that improve the overall Digital Video Broadcasting Terrestrial Second Generation (DVB-T2) gain. The rotated constellation's performance gain has been analyzed by comparing each case of using a non-rotated constellation. In this comparison, three constellation types have been used: QPSK, 16-QAM, and 64-QAM, with all available six code rates supported by the DVB-T2 system. The simulation has been performed in MATLAB version R2020b under various fading channels such as Gaussian, Ricean, Rayleigh, and 0 dB Echo to illustrate the effectiveness of the described technique. Finally, obtained results show an outstanding improvement in DVB-T2 performance when employing rotated constellation in terrible fading environments by choosing a particular parameters configuration.