ディジタル衛星放送用QPSK復調器の検討 : コンシューマエレクトロニクス,放送方式,放送現業

抄録

We developed a prototype QPSK demodulator for digital DBS receivers. It uses a digital AFC and a digital PLL for fast and stable carrier recovery. Experimental results showed the sufficient performance of the demodulator even under the severe condition of ±2.4MHz frequency offset. In addition, a computer simulation showed that the hardware can be downsized effectively using an approximation of Taylor expansion.