Research

I am currently interested in the following areas of research:

• Wireless Networks: How can we communicate useful information using radio transmissions, in the most efficient form, and using the simplest mechanisms?
• Wireless Sensing: How can we identify and track changes in our physical environment by observing it from afar?
• Time Synchronization: How do we get many entities to agree on what the time is and have them work together? I look at what can we do with cutting-edge devices that keep very precise time. Further, I also study what we can do with very inexpensive devices that keep inaccurate time.
• Embedded Systems: How can we design and use tiny computers that can be a part of us and our environment?

Publications

Thesis

The thesis for my PhD in Electrical and Computer Engineering at CMU can be found here. A quick explanation of my work is coming soon.

Conferences

• Charm: Exploiting Geographical Diversity Through Coherent Combining in Low-Power Wide-Area Networks
  [slides] [pdf]
  Adwait Dongare, Revathy Narayanan, Akshay Gadre, Anh Luong, Artur Balanuta, Swarun Kumar, Bob Iannucci, and Anthony Rowe.
  In the International Conference on Information Processing in Sensor Networks (IPSN), 2018 at Porto, Portugal

  We design a system for LoRa low-power wide-area networks, that combines weak radio transmissions at multiple gateway receivers and coherently combines the signals to decode the underlying data. This system improves the coverage of the network and allows wireless devices to communicate at higher data rates, which results in more battery life.
  Won the best paper award at IPSN 2018

• Pulsar: A Wireless Propagation-Aware Clock Synchronization Platform
  [slides] [pdf]
  Adwait Dongare, Patrick Lazik, Niranjini Rajagopal and Anthony Rowe
  In Real-Time and Embedded Technology and Applications Symposium (RTAS), 2017 at Pittsburgh, Pennsylvania, USA

  We design and evaluate a wireless clock synchronization system called Pulsar that achieves better than 5 nanosecond accuracy using a combination of an ultra-wideband (UWB) radio and a chip-scale atomic clock (CSAC). We expect it to have direct applications in next-generation wireless systems that target high scalability.
  Won the best presentation award at RTAS 2017

• Timeline: An Operating System Abstraction for Time-Aware Applications
  [pdf] [link]
  Fatima Anwar, Sandeep D’souza, Andrew Symington, Adwait Dongare, Ragunathan Rajkumar, Anthony Rowe, and Mani Srivastava.
  In Real-Time Systems Symposium (RTSS), 2016 at Porto, Portugal, pp. 191-202. IEEE, 2016

  We introduce the Timeline abstraction to Linux to simplify device synchronization and development of real-time applications.

Workshops

• OpenChirp: A Low-Power Wide-Area Networking Architecture
  [slides] [pdf]
  Adwait Dongare, Craig Hesling, Khushboo Bhatia, Artur Balanuta, Ricardo Lopes Pereira, Bob Iannucci and Anthony Rowe
  In First International Workshop on Smart Edge Computing and Networking (SmartEdge), 2017 IEEE at Kona, Hawaii, USA

  We describe the architecture of a Low-Power Wide Area Network (LPWAN) named OpenChirp and the early experience in deploying it around CMU and Pittsburgh.

Demos

• Demo Abstract: The OpenChirp Low-Power Wide-Area Network and Ecosystem [link]
  Adwait Dongare, Anh Luong, Artur Balanuta, Craig Hesling, Khushboo Bhatia, Bob Iannucci, Swarun Kumar, and Anthony Rowe
  In Proceedings of the 17th ACM/IEEE International Conference on Information Processing in Sensor Networks, pp. 138-139. IEEE Press, 2018.

• Demo Abstract: Propagation-Aware Time Synchronization for Indoor Applications
  [link]
  Adwait Dongare, and Anthony Rowe.
  In Proceedings of the 14th ACM Conference on Embedded Network Sensor Systems at Stanford, California, USA, pp. 292-293. ACM, 2016