Title :
New studies about a high data rate HF parallel modem
Author :
Coutolleau, Mare ; Vila, Pierre ; Merel, Dominque ; Pirez, Didier ; Mouy, Benoit
Author_Institution :
Thomson-CSF Commun., Gennevilliers, France
Abstract :
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
Keywords :
demodulation; fading channels; modems; modulation coding; noise; quadrature amplitude modulation; quadrature phase shift keying; radio equipment; turbo codes; 9600 bit/s; QAM; QPSK; coding; coherent parallel modem; coherent parallel modulation; demodulation; frequency selective fading channel; high data rate HF parallel modem; modulation coding; noise; pilot tones; recursive systematic code; turbo-code; waveform; Absorption; Bit rate; Demodulation; Fading; Frequency shift keying; Hafnium; History; Intersymbol interference; Modems; Turbo codes;
Conference_Titel :
Military Communications Conference, 1998. MILCOM 98. Proceedings., IEEE
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-4506-1
DOI :
10.1109/MILCOM.1998.722157
