Ambuj VARSHNEY
Assistant Professor- University of California, Berkeley, USA (Postdoctoral Scholar) (2020 - 2022)
- Uppsala University, Sweden (PhD)
Ambuj Varshney's interests span circuits, devices, software, networking stacks, and applications, focusing on wireless embedded systems. A key focus of his research group (WEISER) is tackling the embedded systems' energy challenge to allow for embedded system's ubiquitous and sustainable deployment. He has received numerous awards and serves on many major scientific conferences' organizing and program committees.
RESEARCH AREAS
RESEARCH INTERESTS
Wireless Communication
Internet of Things
Embedded Systems
Mobile Computing
RESEARCH PROJECTS
Tackling Energy-Efficient Reception Challenge for Next Billion IoT Devices
The proposal addresses the energy challenge in IoT by designing energy-efficient receivers with tunnel diodes and LiFi or visible light communication, to enable sustainable, battery-free IoT devices.
RESEARCH GROUPS
Wireless, Embedded, Intelligence, Sensing, and Emerging Technologies in Real-world(WEISER)
We enjoy building systems. This involves embedded platform design, programming, networking, and real-world deployments of embedded systems. The required skill set ranges from chip fabrication and programming microcontrollers to developing networking and wireless protocols, distributed computing concepts, machine learning frameworks, and prototyping applications for various scenarios.
TEACHING INNOVATIONS
SELECTED PUBLICATIONS
- 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
- TunnelSense: Low-power, Non-Contact Sensing using Tunnel Diodes. In IEEE RFID 2024
- TunnelLiFi: Bringing LiFi to Commodity Internet of Things Devices. In ACM HotMobile 2023
AWARDS & HONOURS
Mentor to Winner of Student Research Competition: MobiCom 2017 (Graduate), MobiCom 2023 (Undergraduate)
Best Paper Award ACM VLCS (co-located with Mobicom) 2017
ACM WiSec Best Demonstration Award 2018
ABB Research Award in Honour of Honor of Hubertus von Grunberg (Doctoral dissertation) (Endowment of 300,000 USD) 2019
VINNOVA (Swedish Innovation Agency) Breakthrough Ideas 2019 (with grant of 50k USD)
University of California, Berkeley FORM+FUND Fellow 2021
Part of Jury for Selection of ABB Research Award in Honour of Hubertus von Grunberg 2022
ACM MOBISYS Best Demonstration Award 2023
Google Research Scholar Program Award 2024
ACM/IEEE IPSN Best Demonstration Runner-Up 2024
COURSES TAUGHT
CS4222
Wireless Networking
CS5272
Embedded Software Design
CS5422
Wireless Networking