Some experimental results on physical level protocol for computer network via Japanese communication satellite

Experimental results of the physical level protocol for a computer network consisting of the communication satellite 30/20 GHz band are described. The experiment employed a network configuration including a central large earth station and many associated small user stations sharing an SCPC channel by a TDMA-like multiple access method. Each small user station has an antenna measuring two meters in diameter. The channel data rate is 64 kbit/s with QPSK connected with error correction of rate 3/4 convolutional code. Experimental results are presented on the bit error rate vs. C/N, packet error rate vs. C/N, and burst synchronization characteristics.