FSK Demodulation in Wireless Charging Technology

Authore(s) : Gonugunta Harshavardhan Reddy1T. Praveen Kumar2M Dinesh Kumar3

Volume : v(8), Issue : 9, April - 2017

Abstract : Wireless charging is a technology that eliminates the need for physical wire connections to charge portable electronics like cell phones, earbuds, and accessories. The Wireless Power Consortium is an international group that supports wireless charging. In-band communication is used by the transmitter and receiver in wireless charging. AM modulation will be used by the receiver to communicate with the transmitter, and FSK modulation will be used  by  the  transmitter  to  communicate  with  the  receiver.  Communication  in  wireless charging technology is half-duplex type. To decode the data that the transmitter transmits, the receiver must implement FSK Demodulation. Due to the extremely small time difference between the carrier and modulator signals, standard FSK demodulation techniques using PPL-based or Filter-based methods will not work. In the document, FSK demodulation method is developed which can decode the data. It uses a sampler to output a sampled signal that has been through a low pass filter after sampling  the  FSK  signal.  This  is  sent to  a device that can  detect frequency  shifts,  the frequency shift detector.

Article: Download PDF Journal DOI : 292

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Article No : 21587

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References :

1]  FSK-based  Simultaneous  Wireless  Information  and  Power  Transfer  in  Inductively Coupled Resonant Circuits Exploiting Frequency Splitting Author: Peter A. Hoeher, Fellow, IEEE [2]  Introduction  to  In-band  Communication  of  Qi-based  Wireless  Power  Designs  and System-Level Challenges from Renesas [3] Dual Band Wireless Power and FSK Data Telemetry for Biomedical Implants Authors: L H Jung, P... More

1]  FSK-based  Simultaneous  Wireless  Information  and  Power  Transfer  in  Inductively Coupled Resonant Circuits Exploiting Frequency Splitting Author: Peter A. Hoeher, Fellow, IEEE [2]  Introduction  to  In-band  Communication  of  Qi-based  Wireless  Power  Designs  and System-Level Challenges from Renesas [3] Dual Band Wireless Power and FSK Data Telemetry for Biomedical Implants Authors: L H Jung, P Byrnes-preston, Roland Hessler, T Lehmann, G J Suaning, Nigel Lovell, [4]  FSK-Based  Simultaneous  Wireless  Information  and  Power  Transfer  in  Inductively Coupled Resonant Circuits Exploiting Frequency Splitting [5] Qi - mobile computing | Wireless Power Consortium [6] Inductive charging - Wikipedia [7] Wireless Power Charging Technologies - Advantages and How it Works (epectec.com) [8] Wireless Charging Technology of the Future and Its Applications (einfochips.com) [9] Inductive Charging: Definition & Tech - Infineon Technologies... Less