15-5 21GHz帯高度衛星放送システムの検討 : デジタル変調方式と誤り訂正方式

抄録

Currently, the broadband FM is used for satellite broadcasting system in the 12 GHz band. For future 21 GHz band broadcasting systems, digital broadcasting will be expected because of the higher flexibility and compatibility with other digital media. The information bit rate will increase according to requirement of definition and channels. The 21 GHz band satellite broadcasting has degradation of performance due to rain. Therefore, we need to adopt modulation methods that has advantage to noise and efficiency of frequency bands. This paper describes consideration of QPSK using the convolutional coding and the trellis coded 8 PSK for digital satellite broadcasting system in 21 GHz band.