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US 2024/0356569 A1Published application
High efficiency non-pulse width modulation communications system and method
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorJack Yuen Dea
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Abstract
The system and method of the present invention provide power efficient, high fidelity non-PWM communications of audio signals for reception by a modulating AM receiver at various useful frequency bands, or loud speaker transmission using sound waves.
Claims17
A high fidelity non-pulse width modulation communications system for audio signal transmission, comprising:
- a radio frequency (RF) source for generating a carrier signal;
- a first switching amplifier configured to receive the carrier signal and generate an amplified carrier signal;
- a phase-shifter configured to receive the carrier signal and an input audio signal, the phase-shifter further configured to phase-shift the carrier signal by the audio signal;
- a second switching amplifier configured to amplify the audio phase-shifted carrier signal received from the phase-shifter;
- and
- a RF low pass filter configured to pass a combination of the amplified carrier signal and the audio phase-shifted carrier signal as an output audio modulated RF signal.
3 more elements
A method for transmitting a high fidelity non-pulse width audio modulated radio frequency (RF) signal, the method comprising:
- providing a high fidelity non-pulse width modulation communications system for audio signal transmission configured to receive an input audio signal and output the high fidelity non-pulse width modulated audio signal, the system comprising:
- a RF source for generating a carrier signal;
- a first switching amplifier configured to receive the carrier signal and generate an amplified carrier signal;
- a phase-shifter configured to receive the carrier signal and an input audio signal, the phase-shifter further configured to phase-shift the carrier signal by the audio signal, outputting an audio phase-shifted carrier signal;
- a second switching amplifier configured to amplify the audio phase-shifted carrier signal;
- a RF low pass filter configured to pass a combination of the amplified carrier signal and the audio phase-shifted carrier signal as an output audio modulated RF signal;
- and
- an antenna configured for transmitting the output audio modulated RF signal;
- amplifying the carrier signal to obtain an amplified carrier signal;
- phase-shifting the carrier signal to obtain a phase-shifted carrier signal;
- modulating the phase-shifted carrier signal with the input audio signal to obtain an input audio signal modulated phase-shifted carrier signal;
- amplifying the input audio signal modulated phase-shifted carrier signal to obtain an amplified input audio signal modulated phase-shifted carrier signal;
- combining the amplified carrier signal with the amplified input audio signal modulated phase-shifted carrier signal to obtain a net interference current that is an output audio modulated RF signal;
- and
- transmitting the output audio modulated RF signal.
12 more elements
Dependencies are inferred from the claim text.