Multi-Carrier and Spread Spectrum Systems

Nowadays, multi-carrier transmission is considered to be an old concept. Its basic idea goes back to the mid 1960s. Nevertheless, behind any old technique there are always many simple and exciting ideas, the terrain for further developments of new efficient schemes. Our first experience with the simple and exciting idea of OFDM started in early 1991 with digital audio broadcasting (DAB). From 1992, our active participation in several research programmes on digital terrestrial TV broadcasting (DVB-T) gave us further opportunities to look at several aspects of the OFDM technique with its new advanced digital implementation possibilities. The experience gained from the joined specification of several OFDM-based demonstrators within the German HDTV-T and the EU-RACE dTTb research projects served as a basis for our commitment in 1995 to the final spe.

Từ khóa: Spread Spectrum Systems, Multi-Carrier Systems, multi-carrier transmission, kỹ thuật số, kỹ thuật truyền sóng, phát sóng truyền hình