Hybrid Data Transmission Technique for Multimedia Satellite Broadcasting

Masatoshi HAMADA
Fumiyuki ADACHI

IEICE TRANSACTIONS on Communications   Vol.E85-B    No.8    pp.1463-1468
Publication Date: 2002/08/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Outstanding Papers from APCC 2001)
satellite broadcasting,  data transmission,  multimedia communication,  

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A hybrid data transmission technique for multimedia satellite broadcasting is proposed. The main-channel data and sub-channel data are simultaneously transmitted using QPSK modulation and 2ASK modulation, respectively, but the latter modulation timing is offset by half the main-channel QPSK symbol length in time. The BER performance in a Gaussian channel, the transmission bandwidth, and the transmit power peak factor are theoretically analyzed for various impulse responses of the sub-channel transmit filter. It is found that the use of the sub-channel transmit filter having a sine impulse response minimizes the sub-channel BER while keeping the transmission bandwidth and the transmit power peak factor lower than those of CAPSK transmission.