Title :
Extension of the data capacity of the European D2-MAC direct broadcasting satellite system
Author :
Gross, B. ; Zschunke, W.
Author_Institution :
Inst. for Telecommun., Tech. Univ., Darmstadt, Germany
Abstract :
Two methods for inserting an additional data signal into the standard D2-MAC (multiplexed analog components) signal are presented. Specifically, two methods for doubling the data rate-one using FDM and the other TDM-are proposed and investigated by computer simulation. These two proposals are compatible with the existing D2-MAC system if-in the case of FDM (frequency division multiplexing) the ADS (additional data signal) is sufficiently suppressed by a 5 MHz lowpass filter in the receiver or-in the case of TDM (time division multiplexing)-the receive filter has a bandwidth of 10.125 MHz. In the latter case this is not a stringent requirement for compatibility if the ADS is inserted with sufficiently low amplitude
Keywords :
direct broadcasting by satellite; frequency division multiplexing; television broadcasting; television standards; time division multiplexing; 10.125 MHz; 5 MHz; European D2-MAC direct broadcasting satellite system; FDM; TDM; additional data signal; data capacity; frequency division multiplexing; lowpass filter; multiplexed analog components; receive filter; time division multiplexing; Artificial satellites; Bandwidth; Bit rate; Clocks; Europe; Frequency division multiplexing; Frequency modulation; HDTV; Satellite broadcasting; TV;
Conference_Titel :
Telecommunications Symposium, 1990. ITS '90 Symposium Record., SBT/IEEE International
Conference_Location :
Rio de Janeiro
DOI :
10.1109/ITS.1990.175632
