Simulation of FEC/ARQ data transmission using stored land mobile satellite channels

The fading behaviour of the land mobile satellite channel has been recorded in different environments. The recordings are used as a basis for the simulation of data transmission schemes with ARQ. The influence of the main system parameters on the throughput of data transmission schemes with automatic repeat request (ARQ) is evaluated and discussed. There exist optimum values for the code rate of the data blocks, for the signalling rate, and for the data blocklength. Compared to ARQ schemes with pure error detection hybrid ARQ schemes with error correction are superior with respect to achieveable information rate and are able to work at lower link power. Overall, the results indicate that by using ARQ, a reliable telegraphy service via satellite can be established not only in open areas but also in cities.