Patent ID: 9571210
Date: 2017-02-14
CPC Classifications: H03D,H04B

Claim:
1. A signal processing device, comprising: a modulation generating unit configured to generate a positive threshold value and a negative threshold value based on an amplitude shift keying (ASK)-modulated carrier signal; a positive detecting unit configured to compare voltage the ASK-modulated carrier signal with the generated positive threshold value, and detect a first value of the voltage which is higher than the positive threshold value as a positive amplitude fluctuation portion; a negative detecting unit configured to compare the voltage of the ASK-modulated carrier signal with the generated negative threshold value, and detect a second value of the voltage which is lower than the negative threshold value as a negative amplitude fluctuation portion; and an adding unit configured to add the positive amplitude fluctuation portion and the negative amplitude fluctuation portion of the voltage of the ASK-modulated carrier signal.