衛星通信のための多レベル符号化変調を用いたCODECと多シンボル差動検波の研究

概要

論文の詳細を見る
One of the key technologies for realizing high data rate (HDR) satellite is to design efficient HDR codec. Earlier we proposed a concatenated codec based on multilevel codes and have shown that using multidimensional features, the codec reliably supports data rate of 155.52 Mbit/s (STM-1)over a 72 MHz transponder. At high data rate, carrier acquisition and tracking in the receiver is extremely difficult if not impossible. For a solution differential detection can be applied. However, it suffers performance penalty when compared to ideal coherent detection. For a power limited system such loss can not be tolerated. In multiple-symbol differential detection has been proposed for some performance complexity tradeoff. In this paper we evaluate the performance of the HDR codec with multiple-symbol differential detection and show that only a slight increase in the length of the observation interval causes performance improvement.
1997-08-13