New studies about a high data rate HF parallel modem

This paper presents a new 9600 bps high data rate HF modem. This modem uses a coherent parallel modulation thanks to the addition in the waveform of known pilot tones, the channel as well as the the noise on each tone can be estimated during demodulation. The coding scheme uses the turbo-code principle. This new coherent parallel modem offers an interesting and extremely competitive solution for a high data rate HF modem in a frequency selective fading channel.