2010年所提出查表法相差編碼在QAM可改善錯誤效能。本篇論文以此為基礎，將其運用在合作式無線系統的二種架構，架構一使用放大後傳送，在此架構下將16APSK查表法之相差編碼和16APSK傳統相差編碼比較；架構二使用分散式相差時空調變，在此架構下使用空時碼查表法之相差編碼，可避免以往相差時空調變星座圖擴展的問題，在查表法之相差編碼和架構二的比較分為放大後傳送、解碼後傳送二種方式來比較，最後把架構一和架構二在相同情況下做比較。 Differential encoding by a table was proposed in 2010 years. Using it can effectively improve error performance in the QAM. This paper as a basis, it uses two kinds of architecture in cooperative wireless systems. First one using the amplified-and -forward transmission, in this framework will compare 16APSK differential encoding by a table with the traditional 16APSK differential encoding . Second uses distributed differential space-time modulation. In this architecture using differential space-time modulation by a table to avoid the expansion of the constellation of the transmitted signals. The differential encoding by a table compare with architecture second is divided into amplified-and-forward and decoded-and-forward two ways. Finally put two architectures in the same case for comparison.
