651 67055


Assistant Professor

  • B.Tech (Information and Communication Technology, DA-IICT, India, 2011)
  • Ph.D. (Computer Science, Uppsala University, Sweden, 2018)
  • Postdoctoral scholar (Uppsala University, Sweden, 2018-2020)
  • Postdoctoral scholar (University of California, Berkeley, 2020-2022)

Professor Ambuj Varshney is an Assistant Professor at the School of Computing at the National University of Singapore, where he works in the fields of embedded systems, wireless, and mobile computing. Before joining the National University of Singapore, he was a postdoctoral scholar at the University of California, Berkeley's - Department of Electrical Engineering and Computer Sciences (EECS). He has also been a visiting researcher at the Royal Institute of Technology (KTH) in Sweden. Professor. Varshney received his Ph.D. from Uppsala University, Sweden, even before he worked as an engineer at NXP Semiconductors. Professor Varshney has made significant contributions to the field of embedded systems, with a particular focus on addressing the problem of energy asymmetry among components. This issue is one of the biggest barriers to the widespread deployment of the Internet of Things. He has developed low-power wireless transmitters with exceptional range and low power consumption. His research has been recognized with numerous awards and accolades, including the 2019 ABB Research Award in honour of Hubertus von Gruenberg. His students have also had notable successes, including a win at the ACM Student Research Competition at ACM MobiCom 2017. In addition to his research, Varshney has served as a jury member, program committee member, and in various organizational roles for scientific events.



  • Wireless Communication

  • Internet of Things

  • Embedded Systems

  • Mobile Computing





  • Securing Battery-free Backscatter Tags through Fingerprinting. In ACM HOTNETS 2021
  • PassiveLiFi: Rethinking LiFi for Low-Power and Long Range RF Backscatter. In ACM MOBICOM 2021
  • Tunnel emitter: tunnel diode based low-power carrier emitters for backscatter tags. In ACM MOBICOM 2020
  • Two to Tango: Hybrid Light and Backscatter Networks for Next Billion Devices. In ACM MOBISYS 2020
  • TunnelScatter: Low Power Communication for Sensor Tags using Tunnel Diodes. In ACM MOBICOM 2019
  • Connecting Battery-free IoT Tags Using LED Bulbs. In ACM HOTNETS 2018
  • LoRea: A Backscatter Architecture that Achieves a Long Communication Range. In ACM SENSYS 2017
  • Judo: addressing the energy asymmetry of wireless embedded systems through tunnel diode based wireless transmitters, ACM MOBISYS 2022


  • ABB Research Award in Honour of Honor of Hubertus von Grünberg (Doctoral dissertation) 2019

  • ACM WiSec Best Demonstration Award 2018

  • Best Paper Award ACM VLCS (co-located with Mobicom) 2017

  • Part of Jury of ABB Research Award in Honour of Hubertus von Grünberg 2022

  • Winner ACM Student Research Competition at MOBICOM (Graduate) (Mentor) 2017

  • Among Top 15 innovative projects of Uppsala University 2019

  • University of California, Berkeley FORM+FUND Fellow 2021

  • VINNOVA (Swedish Innovation Agency) Breakthrough Ideas 2019 (with grant of 50k USD)

  • ABB Research Award in Honour of Honor of Hubertus von Grünberg (Grant 300k$) 2019


Wireless Networking
Embedded Software Design
Wireless Networking