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PhD candidate
Uppsala University
Sweden


ambuj.varshney@it.uu.se

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I am a fifth-year PhD student at Uppsala University, Sweden. My advisors are Professor Thiemo Voigt (SICS and Uppsala University, Sweden) and Professor Luca Mottola (Politecnico Di Milano, Italy and SICS, Sweden). I am part of the Uppsala Networked Objects (UNO) research group. I also actively collaborate with Networked Embedded Systems (NES) group at Swedish Institute for Computer Sciences (SICS).

My research interests are in designing sensing and communication mechanisms for low-power systems. To that end, I had developed the first sensor testbed equipped with electronically steerable directional antennas (IPSN 2015, SENSYS 2015). For the past two years, I have been fascinated with ultra-low power sensing and communication. My present focus is to devise mechanisms based on visible light and backscatter communication to enable new battery-free applications! For example, one of my recent research effort demonstrates a architecture that achieved the highest demonstrated range with backscatter communication (SENSYS 2017, HOTWIRELESS 2017). We achieved a range of 3.4 kilometers, while only consuming 70 microwatts to transmit at the backscatter tag.

I also enjoy teaching, and I am fortunate that even during my short time as a PhD student, I was given opportunity to mentor several brilliant students. Three (out of five) of these students secured PhD positions after finishing their thesis, and one won the first prize in graduate category at ACM Student Research Competition (held at ACM MOBICOM 2017).

Before starting to work as a PhD student, I graduated with Bachelors in Information and Communication Technology (equivalent major: Computer science, minor: Electronics and Communication) in 2011. As an undergraduate, and later as a research engineer, I worked with Professor Prabhat Ranjan and developed wireless sensor nodes for wildlife monitoring and seismic detection, here (1,2,3) are some the pictures of the node that I designed! I also worked for a short duration as a software engineer at NXP Semiconductors before embarking on the PhD journey.