Subcarrier injection system and method using adaptive level-shifted minimum shift keying
US5699433A · kind A · utility
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3References
12Claims
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Key dates
| Filing date | Mar 13, 1996 |
| Grant date | Dec 16, 1997 |
| Priority date | — |
| Expiry date | Mar 13, 2016 |
Classification
- Technology area (CPC —)General
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.