You can find my resume and research statement
here
About
I am a postdoctoral scholar working under the mentorship of Prof. Prabal Dutta at Department of Electrical Engineering and Computer Sciences at University of California, Berkeley.
Research Interests:
My research interests centers around designing and tackling challenges of embedded -- sensing, communication and computation -- systems. I take an interdisciplinary approach of combining the concepts in communication, computer science and electronics to design embedded systems and applications. I enjoy working at their intersection.
In the recent few years, the focus of my research has been around designing sensing and communication systems that can operate at very low power which makes it possible to operate these systems on tiny batteries, or even without batteries on minuscle amounts ofenergy harvested from the ambient environment. E.g., As part of my postdoctoral work, I am working on designing low-power sensors to enable large scale data collection for future factores. The low-power may even enable these sensors to operate without batteries! Check this video (ABB produced video). You can also read more about me here , and in swedish here .
Prior Background:
Before joining UC Berkeley, I spent several years at Uppsala University, Sweden, where I also obtained my Ph.D degree. During my time at Uppsala University, I shephereded the move of the research group from classical wireless sensor networks towards emerging communication areas (Backscatter, LiFi, Tunnel Diodes).
Before joining Uppsala University, I worked at NXP Semiconductors, where I was responsible to design low-power wireless networking stack. I obtained a Bachelors degree in Information and Communication Technology, and during my studies, I primarily worked with Prof. Prabhat Ranjan, and I studied and developed interest in electronics, computer science, and communications, and designed wireless cameras to take images of tigers!
News
- [April 2021] I am serving on the program committee of the exciting new workshop "No Power and Low Power Internet-of-Things (LP-IoT 2021)" to be held together with ACM MobiCom 2021. Please consider submitting your work!
- [March 2021] I gave an invited talk at IMDEA Network Institute, Spain regarding tackling the energy asymmetry in wireless embedded systems
- [March 2021] I gave an invited talk at Imperial College London regarding tackling the energy asymmetry in wireless embedded systems
- [March 2021] I gave an invited talk at National University of Singapore regarding tackling the energy asymmetry in wireless embedded systems
- [March 2021] I gave an invited talk at ETH Zurich regarding tackling the energy asymmetry in wireless embedded systems
- [March 2021] I gave an invited talk at Aalto University regarding tackling the energy asymmetry in wireless embedded systems
- [December 2020] I am serving on the Program Committee of IEEE INFOCOM 2021 , IEEE ICDCS 2021 and IEEE DCOSS 2021. Please consider submitting your work!
- [November 2020] Together with colleagues at IMDEA Networks Institute, Spain we presented work to design battery-free platforms that use hybrid communication medium (RF-backscatter and LiFi) at European Researchers' Night 2020 and Science and Innovation Week 2020. Watch more about our exciting project in this video.
- [October 2020] I gave an invited talk ACM SIGMOBILE India Chapter regarding enabling widespread sustainable sensing. The announcement was distributed through official ACM handles.
- [September 2020] Our work to design low-power carrier emitters was accepted and presented at ACM MOBICOM 2020. This work was jointly done together with Lorenzo Corneo (Uppsala University). Find presentation video here .
- [August 2020] Excited to start new chapter in my career and start working as a Postdoctoral Scholar at University of California, Berkeley under the guidance of Prof. Prabal Dutta.
- [July 2020] I presented our to design hybrid light and RF backscatter systems at ACM MOBISYS 2020. This work done together with fantastic colleagues at IMDEA Networks Institute, Spain. You can find video presentation here .
- [June 2020] Extremely proud that Andreas Soleiman whom I have been mentoring for past several years has received Ph.D. admits from University of California@Berkeley, MIT (accepted), University of Washington@Seattle, Dartmouth and others!!
- [December 2019] Uppsala University Innovation appreciated our battery-free sensing work with Attractive Innovation Award and selected it among Top 15 projects from the University! Find the press release here
- [November 2019] I received the prestigious ABB Research Award 2019 for my doctoral dissertation and ongoing work to enable large-scale data collection in inudstries using battery-free sensors. You can read about the project here. This award includes the highest endowment offered by any company with value being 300,000 USD.
- [October 2019] I presented our work on using tunnel diodes for enhancing backscatter systems at ACM MOBICOM 2019@Mexico! Please find the presentation here.
Selected Publications
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Tunnel Emitter: Tunnel Diode based Low-Power Carrier Emitters for Backscatter Tags
Ambuj Varshney , Lorenzo Corneo
ACM MOBICOM 2020
Find the conference video presentation here!
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Two to Tango: Hybrid Light and Backscatter Networks for Next Billion Devices
Ander Galisteo* , Ambuj Varshney* , Domenico Giustiniano .
* Co-primary authors contributing equally to the work
ACM MOBISYS 2020
Find the conference video presentation here!
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TunnelScatter: Low Power Communication for Sensor Tags using Tunnel Diodes
Ambuj Varshney , Andreas Soleiman , Thiemo Voigt
ACM MOBICOM 2019
Find the conference video presentation here!
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Connecting Battery-free IoT Tags Using LED Bulbs
Domenico Giustiniano , Ambuj Varshney, Thiemo Voigt
ACM HOTNETS 18
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Demonstration: Towards Battery-free Radio Tomographic Imaging
Abdullah Hylamia, Ambuj Varshney , Andreas Soleiman, Panos Papadimitratos , Christian Rohner, Thiemo Voigt
Best Demonstration Award!!
ACM WISEC 2018
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Battery-free 802.15.4 Receiver
Carlos Perez Penichet, Claro Noda, Ambuj Varshney , Thiemo Voigt
ACM/IEEE IPSN 2018
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LoRea: A Backscatter architecture that achieves a long communication range
Ambuj Varshney , Oliver Harms, Carlos Penichet, Christian Rohner , Frederik Hermans, Thiemo Voigt
2019 ABB HvG Award Winner
ACM SENSYS 2017
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Battery-free Visible Light Sensing
Ambuj Varshney, Andreas Soleiman, Luca Mottola, Thiemo Voigt
Best Paper Award
ACM Student Research Competition Winner (Graduate, MobiCom) (Mentored student)
Google Faculty Research Award 2018 (PhD advisor)
ACM VLCS (Co-located with ACM MobiCom) 2017
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Towards wide-area backscatter networks
Ambuj Varshney , Carlos Perez Penichet, Christian Rohner, Thiemo Voigt
ACM HotWireless (Co-located with ACM MobiCom) 2017
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modBulb: A Modular Light Bulb for Visible Light Communication
Kasun Hewage, Ambuj Varshney , Abdalah Hilamia, Thiemo Voigt Thiemo Voigt
ACM VLCS (Co-located with ACM MobiCom) 2016
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Augmenting IoT Networks with Backscatter-Enabled Passive Sensor Tags
Carlos Perez Penichet, Frederik Hermans, Ambuj Varshney , Thiemo Voigt
ACM HotWireless (Co-located with ACM MobiCom) 2016
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Directional Transmissions and Receptions for High-throughput Bulk Forwarding in Wireless Sensor Networks
Ambuj Varshney , Luca Mottola, Mats Carlsson , Thiemo Voigt
ACM SENSYS 2015
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dRTI: Directional Radio Tomographic Imaging
Bo Wei , Ambuj Varshney , Wen Hu, Neal Patwari, Thiemo Voigt , Chun Tung Chou
ACM/IEEE IPSN 2015
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You can read more about my teaching activities here.