DocumentCode :
1217153
Title :
The AN/GSC-10 (KATHRYN) Variable Rate Data Modem for HF Radio
Author :
Zimmerman, Mark S. ; Kirsch, Alan L.
Author_Institution :
General Atronics Corp., Philadelphia, Pa.
Volume :
15
Issue :
2
fYear :
1967
fDate :
4/1/1967 12:00:00 AM
Firstpage :
197
Lastpage :
204
Abstract :
The AN/GSC-10 (KATHRYN) is a new modem equipment for digital data transmission on HF radio circuits. Its unique modulation technique provides a wide range of signal redundancy and data rate to allow optimum performance over the correspondingly wide range of propagation conditions characteristic of HF radio. Efficient detection is achieved at all levels of redundancy by utilizing a fully coherent correlation detection technique. The detector is a continually self-adjusting matched filter to the timevarying ionospheric transfer function. The fine grain propagation data derived for detection allow continuous observation of parameters such as multipath delay and coherence time. As a variable data rate modem with channel measurement capabilities, it can serve in future fully adaptive communication nets.
Keywords :
Adaptive systems; Correlation detection; Data terminals; Data transmission systems; Digital signals; Diversity reception; Electronic equipment; High frequency; Matched filters; Modems; Modulation; Phase modulation; Circuits; Coherence; Data communication; Delay effects; Detectors; Hafnium; Matched filters; Modems; Propagation delay; Transfer functions;
fLanguage :
English
Journal_Title :
Communication Technology, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9332
Type :
jour
DOI :
10.1109/TCOM.1967.1089577
Filename :
1089577
Link To Document :
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