Variable coded MFSK signaling in an adaptive wideband high-thruput HF/MBC system

The author analyzes a channel adaptive high-throughput interference-resistant combined HF/MBC (meteorburst communications) system using novel techniques to counter time-varying path losses, Doppler spread, and multipath spread. Some of the techniques used are coded MFSK signaling, adaptivity, frequency stepping, high suppression, and resolution adaptive filtering. For simplicity, block orthogonal and dual-k convolution codes are considered. For a 24 kbit/s midlatitude and transauroral link and a 1 Mbit/s meteorburst link, the emitter power requirements are shown to decrease substantially by increasing the value of M as path losses increase. The bandwidth or power requirements are further shown to decrease by the use of variable coded MFSK signaling. The historical background of high-throughput meteorburst communications since 1979 is reviewed