Interval modulation (IM) of a sinusoidal carrier.

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Author
Kilborn, Edgar Leslie Jr.
Date
1976-12Advisor
Myers, Glen A.
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Show full item recordAbstract
Interval Modulation (IM) of a sinusoidal carrier is a
modulation technique unlike AM, FM, or PM. IM conveys the
information of a message waveform by modulating an interval
between bursts of a sinusoidal carrier. IM is accomplished
by sampling the message waveform, producing a delay proportional
to the amplitude of the sampled message waveform
and, upon the completion of the delay, initiating a burst
of a fixed number of full cycles of a sinusoidal carrier.
With the completion of the burst, another sample of the
message waveform is taken and the sequence of events repeats
Because the length of a burst is fixed and because the
delay between bursts is dependent upon the sampled value
of the message waveform, the IM signal is non-periodic.
An analysis is made of the IM signal modulated by a constant
voltage modulating waveform and by general modulating
waveforms. Descriptions are given for the circuits used
in generation and detection of the IM signal. IM signal
parameters are also considered for use with message
waveforms in the audio frequency range.
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.Collections
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