Techniques for spectral efficiency enhancement in DVB-S2 system

U ovom radu analizirana je nova generacija sustava za satelitsku radiodifuziju digitalnog videosignala. DVB-S2 unaprjeCuje i proširuje mogućnosti dosadašnje DVB-S tehnologije, a bazira se na tri koncepta: prijenosna karakteristike vrlo blizu Shannonovog ogranicenja, potpuna fleksibilnost te prihvatljiva složenost prijamnika. Koristi nekoliko vrsta modulacijskih postupaka te napredne tehnike kanalnog kodiranja. Omogućava uporabu adaptivnog kodiranja i modulacije radi prilagodbe parametra modulacije i unutarnjeg kodiranja vrijednostima omjera nositelj/šum na mjestu prijama.In this project it has been analysed the new generation system for satellite digital video broadcasting. DVB-S2 facilitates and extends the existing DVB-S technology, which is based on three concepts: the transmission characteristics close to the Shannon's limit, complete flexibility and reasonable receiver complexity. It uses several types of modulation methods and advanced channel coding techniques. Allows the use of adaptive coding and modulation in order to adapt modulation and coding parameters to the value of a carrier/noise ratio on the receiving site