Title :
Adaptive HF for voice and data
Author :
Schilling, D.L. ; Apelewicz, T. ; Lomp, G. ; Pavelchek, A.
Author_Institution :
Dept. of Electr. Eng., City Coll., City Univ. of New York, NY, USA
Abstract :
Summary form only given. The authors describe an adaptive HF system for voice and video. The system uses information obtained from a link quality analysis and/or ionospheric soundings to determine the appropriate link and frequency over which to communicate. In addition, the system can be frequency hopped, thereby reducing the probability of being jammed. The improved performance obtained using frequency-agile modulation techniques was measured, and it is shown that the FH (frequency hopping) modem described is capable of achieving low error rates at low signal-to-noise ratio and with narrow bandwidth
Keywords :
data communication systems; frequency agility; radiocommunication; visual communication; voice communication; adaptive HF system; frequency hopping modem; frequency-agile modulation techniques; ionospheric soundings; link quality analysis; low error rates; low signal-to-noise ratio; narrow bandwidth; voice/data; voice/video; Adaptive systems; Error analysis; Frequency measurement; Frequency modulation; Hafnium; Information analysis; Jamming; Modems; Signal to noise ratio; Spread spectrum communication;
Conference_Titel :
Military Communications Conference, 1989. MILCOM '89. Conference Record. Bridging the Gap. Interoperability, Survivability, Security., 1989 IEEE
Conference_Location :
Boston, MA
DOI :
10.1109/MILCOM.1989.104041
