Subcarrier injection system and method using adaptive level-shifted minimum shift keying
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United States of America
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Dec 16, 1997
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app pub date -
Mar 13, 1996
filing date -
Mar 13, 1996
priority date (Note) -
Withdrawn
status (Latency Note)
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Abstract
A system for transmitting a main channel signal, a first subcarrier signal, and a second subcarrier signal includes a control signal generator for producing a control signal in response to the amplitude of the main channel signal and the first subcarrier signal, a modulator coupled to the control signal generator and generating the second subcarrier signal, a voltage controlled amplifier for providing the second subcarrier signal at an injection level that varies with the control signal, and a transmitter for transmitting the second subcarrier signal at the varying injection level.
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