System and method for demodulating frequency shift keying signal
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United States of America Patent
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Apr 28, 2020
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N/A
app pub date -
Jun 25, 2019
filing date -
Mar 11, 2019
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Abstract
A system and a method for demodulating a frequency shift keying signal are provided. The system includes a power transmitter and a power receiver. The power transmitter generates a frequency shift keying signal including a power signal and a power modulation instruction message. The power receiver detects a non-modulation period of the power signal within a waiting time, and then modulates a frequency of the power signal according to the power modulation instruction message to generate a pulse width modulated signal. The power receiver then calculates a full period of the pulse width modulated signal and then subtracts the non-modulation period from the full period of the pulse width modulated signal to obtain an undemodulated signal.
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