Trends in Modulation/Demodulation and Coding Techniques for Mobile Satellite Communications Systems

Norihiko MORINAGA  Shozo KOMAKI  Shinsuke HARA  

IEICE TRANSACTIONS on Communications   Vol.E74-B    No.8    pp.2211-2219
Publication Date: 1991/08/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section INVITED PAPER (Special Issue on Modulation and Coding for Mobile Satellite Communication System)

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With the rapid advance in satellite communications technologies, development of mobile satellite communications systems has been carried out in various countries. In a technical aspect to construct high-capacity and high-reliable mobile satellite communication networks, there are two main barriers to get over, i.e., bandwidth limitation and power limitation. In addition, another barrier associated with mobile motion is fading and shadowing. Digital modulation/demodulation and coding techniques, which are key technologies to get over these barriers, have been developed in fusion of advanced satellite communication techniques and specific techniques having grown in terrestrial mobile communication systems. This paper summarizes the mobile satellite channel characteristics and describes a trend of modulation/demodulation and coding techniques for mobile satellite communications systems.