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Research
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. Over the past decade, my research has been focussed 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 novel embedded systems and applications. I enjoy working at the intersection of these areas.
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 .
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 as a software engineer 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
- [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!
- [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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[MOBICOM] Tunnel Emitter: Tunnel Diode based Low-Power Carrier Emitters for Backscatter Tags
[pdf]
Ambuj Varshney , Lorenzo Corneo
The 26th Annual International Conference on Mobile Computing and Networking (ACM MOBICOM 2020)
Find the conference video presentation here!
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[MOBISYS] Two to Tango: Hybrid Light and Backscatter Networks for Next Billion Devices
[pdf]
Ander Galisteo* , Ambuj Varshney* , Domenico Giustiniano .
* Co-primary authors contributing equally to the work
The 18th ACM International Conference on Mobile Systems, Applications, and Services (ACM MOBISYS 2020)
Find the conference video presentation here!
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[MOBICOM] TunnelScatter: Low Power Communication for Sensor Tags using Tunnel Diodes
[pdf]
Ambuj Varshney , Andreas Soleiman , Thiemo Voigt
The 25th Annual International Conference on Mobile Computing and Networking (ACM MOBICOM 2019)
Find the conference video presentation here!
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[HOTNETS] Connecting Battery-free IoT Tags Using LED Bulbs
[pdf]
Domenico Giustiniano , Ambuj Varshney, Thiemo Voigt
The 17th ACM Workshop on Hot Topics in Networks (ACM HOTNETS 18).
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[WISEC] Demonstration: Towards Battery-free Radio Tomographic Imaging
[pdf]
Abdullah Hylamia, Ambuj Varshney , Andreas Soleiman, Panos Papadimitratos , Christian Rohner, Thiemo Voigt
The 11th ACM Conference on Security and Privacy in Wireless and Mobile Networks (ACM WiSec 2018)
Best Demonstration Award
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[IPSN] Battery-free 802.15.4 Receiver
[pdf]
Carlos Perez Penichet, Claro Noda, Ambuj Varshney , Thiemo Voigt
The International Conference on Information Processing in Sensor Networks (ACM/IEEE IPSN 2018)
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[SENSYS] LoRea: A Backscatter architecture that achieves a long communication range
[pdf]
Ambuj Varshney , Oliver Harms, Carlos Penichet, Christian Rohner , Frederik Hermans, Thiemo Voigt
The 15th ACM Conference on Embedded Networked Sensor Systems (ACM SENSYS 2017)
2019 ABB HvG Award Winner
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[VLCS] Battery-free Visible Light Sensing
[pdf]
Ambuj Varshney, Andreas Soleiman, Luca Mottola, Thiemo Voigt
In ACM VLCS (Co-located with ACM MobiCom) 2017
Best Paper Award
ACM Student Research Competition Winner (Graduate, MobiCom)
Google Faculty Research Award 2018
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[HOTWIRELESS] Towards wide-area backscatter networks
[pdf]
Ambuj Varshney , Carlos Perez Penichet, Christian Rohner, Thiemo Voigt
ACM HotWireless (Co-located with ACM MobiCom) 2017
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[VLCS] modBulb: A Modular Light Bulb for Visible Light Communication
[pdf]
Kasun Hewage, Ambuj Varshney , Abdalah Hilamia, Thiemo Voigt Thiemo Voigt
ACM VLCS (Co-located with ACM MobiCom) 2016
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[HOTWIRELESS] Augmenting IoT Networks with Backscatter-Enabled Passive Sensor Tags
[pdf]
Carlos Perez Penichet, Frederik Hermans, Ambuj Varshney , Thiemo Voigt
ACM HotWireless (Co-located with ACM MobiCom) 2016
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[SENSYS] Directional Transmissions and Receptions for High-throughput Bulk Forwarding in Wireless Sensor Networks
[pdf]
Ambuj Varshney , Luca Mottola, Mats Carlsson , Thiemo Voigt
The 13th ACM Conference on Embedded Networked Sensor Systems (ACM SENSYS 2015)
Find the conference video presentation here!
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[IPSN] dRTI: Directional Radio Tomographic Imaging
[pdf]
Bo Wei , Ambuj Varshney , Wen Hu, Neal Patwari, Thiemo Voigt , Chun Tung Chou
The International Conference on Information Processing in Sensor Networks (ACM/IEEE IPSN 2015)
You can read more about my teaching activities here.