A FLEXIBLE TRANSMISSION TECHNIQUE FOR THE SATELLITE ISDB SYSTEM

A new transmission technique which can achieve suitable quality and re liability for satellite ISDB (Integrated Services Digital Broadcasting ) is introduced, The transmission system for satellite ISDB must have high spectrum efficiency, continuous service availability and also sup erior flexibility in its transmission scheme, This paper first studies appropriate transmission schemes, taking account of the 12 GHz band D BS (Direct Broadcasting Satellite) system, Then, employing a hierarchi cal transmission technique and a newly proposed TMCC (Transmission and Multiplexing Configuration Control) signal, it describes the requirem ents for satellite ISDB, The hierarchical transmission extends the ser vice availability under heavy rainfall conditions, The TMCC signal can change the transmission configuration depending on the program conten t and the weather conditions, In addition, a generalized method for th e design of transmission configurations for satellite ISDB is presente d.