NDLI: A hybrid voice/data modulation for the vhf aeronautical channels

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A hybrid voice/data modulation for the vhf aeronautical channels

Content Provider	NASA Technical Reports Server (NTRS)
Author	Akos, Dennis M.
Copyright Year	1993
Description	A method of improving the spectral efficiency of the existing Very High Frequency (VHF) Amplitude Modulation (AM) voice communication channels is proposed. The technique is to phase modulate the existing voice amplitude modulated carrier with digital data. This allows the transmission of digital information over an existing AM voice channel with no change to the existing AM signal format. There is no modification to the existing AM receiver to demodulate the voice signal and an additional receiver module can be added for processing of the digital data. The existing VHF AM transmitter requires only a slight modification for the addition of the digital data signal. The past work in the area is summarized and presented together with an improved system design and the proposed implementation.
File Size	618742
Page Count	14
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19930013378
Archival Resource Key	ark:/13960/t1xd5t52m
Language	English
Publisher Date	1993-02-01
Access Restriction	Open
Subject Keyword	Communications And Radar Frequency Modulation Transmitters Receivers Data Transmission Very High Frequencies Amplitude Modulation Digital Data Demodulation Voice Communication Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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