DocumentCode :
3358519
Title :
Adaptive DSP-based MFSK modems for HF aeromobile channels
Author :
Darnell, M. ; Honary, B. ; Clark, P.D.J. ; Horley, N. ; Maundrell, M. ; Vongas, G.
Author_Institution :
Hull Univ., UK
fYear :
1992
fDate :
11-14 Oct 1992
Firstpage :
1086
Abstract :
An adaptive digital-signal-processing (DSP)-based MFSK modem using the PICCOLO modulation scheme has been developed, primarily as a research platform for the investigation of adaptive HF radio modems. The authors describe several important design features of the implementation, including a novel data-derived synchronization scheme. The modem exhibits a far greater degree of responsiveness to both user requirements and channel state than previous implementations. Of particular interest are the efficient memory shadowing technique used in the tone synthesis, the ability to vary the number of samples/symbol, the frequency offset correction method, and the modulation-derived synchronization (MDS) embedded synchronization technique which eliminates the need for any specific synchronization overheads. The use of the model in a semiorthogonal MFSK mode is also discussed
Keywords :
adaptive filters; digital filters; digital signal processing chips; frequency shift keying; mobile radio systems; modems; synchronisation; HF aeromobile channels; MFSK modems; PICCOLO modulation; adaptive HF radio modems; adaptive digital-signal-processing; data-derived synchronization; embedded synchronization; frequency offset correction; memory shadowing; modulation-derived synchronization; semiorthogonal MFSK mode; tone synthesis; Bandwidth; Channel coding; Demodulation; Digital signal processing; Hafnium; Modems; Signal resolution; Signal to noise ratio; Table lookup; Throughput;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Military Communications Conference, 1992. MILCOM '92, Conference Record. Communications - Fusing Command, Control and Intelligence., IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-0585-X
Type :
conf
DOI :
10.1109/MILCOM.1992.244118
Filename :
244118
Link To Document :
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