A Wireless Multimedia Communication System Using Hierarchical Modulation

Yasushi SAKAMOTO  Masakazu MORIMOTO  Minoru OKADA  Shozo KOMAKI  

IEICE TRANSACTIONS on Communications   Vol.E81-B    No.12    pp.2290-2295
Publication Date: 1998/12/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on the Latest Development of Telecommunication Research)
Category: Transmission and Modulation
mobile communication,  hierarchical modulation,   wireless agent,  

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This paper proposes a new wireless multimedia communication system based on hierarchical modulation, which gives unequal transmission reliability corresponding to the sensitivity to the transmission errors. In order to achieve high quality multimedia communication in a band-limited and time-variant fading channel, the proposed scheme changes the modulation scheme according to the contents of information. Numerical analysis shows that the proposed system is an effective high-quality and high-speed multimedia transmission technique in fading channel.