18-6 A Study on the Long Block-length Interleave Transmission Scheme (Part I) : The Concept of Long Block-Length Interleave and the Outline of a Prototype Apparatus

Abstract

The frequency band from 21.4GHz 22GHz is assigned to the 3rd region including Japan and will be available for broadcasting satellite services from the year 2007. This band has a transmission characteristic that transmitted signal is severely degradated by rain attenuation. Therefore, any countermeasure should be take into account to solve this problem. In this article, we propose new technique called "long block-length Interleave" which can improve servise availabirity with low efficiency loss. Some thechniques for realizing long block-length Interleave are also discussed. And finally the prototype apparatus is introduced here.