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. Author manuscript; available in PMC: 2012 Oct 1.
Published in final edited form as: Biomed Signal Process Control. 2011 Oct 1;6(4):356–363. doi: 10.1016/j.bspc.2011.05.007

Fig. 1.

Fig. 1

Data were encoded in the carrier by amplitude shift keying (ASK), with pulse width modulation (PWM) encoding of bits. The carrier was fully modulated, with a duty cycle of 30% to represent a 1, and 50% to represent a 0.