hat
Pou pwoteksyon senbòl, se yon kòd blòk Reed-Salomon ki itilize, ak pou pwoteksyon ti jan, se yon kòd revolusyonèl ak pousantaj kòd diferan travay. Modulation (C) OFDM se karakterize pa fyabilite segondè kont entè-senbòl entèferans (ISI), ki ta menase siyal la resevwa ak ogmante pousantaj erè yo akòz resepsyon an multipath. Dijital difize nan pi wo a mansyone nòm yo ka fèt nan sa yo rele sèl frekans rezo SFN (Single Frekans Rezo). Resepsyon nan siyal plis reta soti nan transmeteur plizyè k ap travay nan rezo a frekans yon sèl ka itilize menm pou amelyorasyon nan efikasite nan pouvwa nan transmeteur.
eng
For symbol protection,a block Reed-Solomon code is used, and for bit protection, a convolutional code with different code rates is employed. Modulation (C)OFDM is characterized by high robustness against inter-symbol interference (ISI), which would threaten the received signal and increase their error rates due to the multipath reception. Digital broadcasting in the above mentioned standards can be performed in so-called single frequency network SFN (Single Frequency Network). Reception of more delayed signals from several transmitters working in the single frequency network can be utilized even for improvement of the power efficiency of transmitters.