Rajat Bhattacharjya

rajatb1 [at] uci [dot] edu

Hi! I am a PhD student at the University of California, Irvine in the Department of Computer Science. At UCI, I’m part of the Dutt Research Group, advised by Distinguished Prof. Nikil Dutt. I’m a full-stack computer systems researcher — spanning algorithms to architecture — with experience across diverse domains including embedded and cyber-physical systems, VLSI design, computer architecture, signal processing, machine learning, wireless communication, and biomedical systems.

My research focuses on designing intelligent, collaborative autonomous agents that embrace their physical embodiment—becoming aware of their goals, hardware constraints, and operating environment—while dynamically co-adapting across computational and communication layers, from embedded devices to programmable networks. I develop the underlying algorithms, architectures, and tools that enable such adaptive behavior, ensuring efficiency, resilience, and sustainability across the full system stack.

Previously, I worked as a Researcher at TCS Research in the Computing Systems Lab, where I focused on building energy-efficient systems for integrated sensing and communication (ISAC). Before that, I was a Software Engineer at Parallel Wireless, Inc., where I worked on 5G NR and 2G access stack development for 1.5 years.

I completed my undergraduate studies in the Department of Electronics and Communication Engineering at the Indian Institute of Information Technology Guwahati in May 2021. During my undergraduate studies, I worked on approximate computing and its various applications. In this period, I worked with Dr. Dip Sankar Banerjee, Dr. Soumyajit Poddar, Dr. Neeraj Goel, and Prof. Muhammad Shafique.

In case you want to know more about my research or want to collaborate with me, please feel free to send me an email.

Email  /  Google Scholar  /  Github  /  LinkedIn  /  ORCID  /  ResearchGate  /  Instagram

profile photo

News

  • [October 2025] ACCESS-AV is accepted at ACM TECS.
  • [April 2025] I am awarded the Bob and Barbara Kleist Endowed Graduate Fellowship for the year 2025 from UCI ICS.
  • [September 2024] I am awarded NSF travel grant for attending the ACM/IEEE Embedded Systems Week (ESWEEK) 2024.
  • [July 2024] Paper on Approximate Multiple Signal Classification accepted at ESWEEK-CASES as a Late Breaking Result paper.
  • [April 2024] I am awarded the ACM/IEEE DAC Young Fellowship for attending 61st DAC.
  • [December 2023] Semiconductor Engineering's Library features our paper Ellora in their weekly technical paper roundup.
  • [November 2023] Paper on design space exploration for generating low-power OFDM-based radar processors accepted at LASCAS 2024.
  • [November 2023] I was interviewed about my journey, spanning from my undergraduate days through my corporate experience, to ultimately securing admission for a CS PhD program in the USA.
  • [September 2023] Back to school. I am starting my PhD in Computer Science at UC Irvine! Wish me luck!
  • [March 2023] Paper on design space exploration for Low-Power Viterbi decoding using approximations accepted at the ACM GLSVLSI 2023.
  • [November 2022] I started working full-time at TCS Research as a Pre-doctoral Research Fellow.
  • [December 2021] We presented our poster on Approximate Communication for 5G and beyond at IEEE HiPC SRS 2021.
  • [November 2021] We presented our paper on efficient biomedical signal processing at IEEE EMBC 2021.
  • [June 2021] I started working as a Software Engineer at Parallel Wireless, Inc.
  • [May 2021] I graduated with a Bachelor of Technology in Electronics and Communication Engineering from the Indian Institute of Information Technology Guwahati with Department Rank 2 in the final year.
  • [September 2020] We won the Best Paper Award (2nd Place) at the ACM GLSVLSI 2020!
  • [December 2019] We won the Best Poster Award at the IEEE HiPC 2019!

Research

game

HYPERDOA: Robust and Efficient DoA Estimation using Hyperdimensional Computing
Rajat Bhattacharjya, Woohyeok Park, Arnab Sarkar, Hyunwoo Oh, Mohsen Imani, Nikil Dutt
Preprint - Under Review, October 2025

game

ACCESS-AV: Adaptive Communication-Computation Codesign for Sustainable Autonomous Vehicle Localization in Smart Factories
Rajat Bhattacharjya, Arnab Sarkar, Ish Kool, Sabur Baidya, Nikil Dutt
In The ACM Transactions on Embedded Computing Systems (TECS), October 2025

game

AAMLA: An Autonomous Agentic Framework for Memory-Aware LLM-Aided Hardware Generation
Rajat Bhattacharjya, Juhee Sung, Hangyeol Jung, Hyunwoo Oh, Arnab Sarkar, Mohsen Imani, Nikil Dutt
To appear at the 39th International Conference on VLSI Design and 25th International Conference on Embedded Systems (VLSID) 2026, Pune, India, Accepted, Oct. 2025

game

MUSIC-lite: Efficient MUSIC using Approximate Computing: An OFDM Radar Case Study
Rajat Bhattacharjya, Arnab Sarkar, Biswadip Maity, Nikil Dutt
In IEEE Embedded Systems Letters (Presented at ACM/IEEE Embedded Systems Week (ESWEEK)- International Conference on Compilers, Architectures, and Synthesis for Embedded Systems (CASES), Raleigh, NC, USA), September 2024

game

Ellora: Exploring Low-Power OFDM-based Radar Processors using Approximate Computing
Rajat Bhattacharjya, Alish Kanani, A Anil Kumar, Manoj Nambiar, M Girish Chandra, Rekha Singhal
In the Proceedings of the 15th IEEE Latin American Symposium on Circuits and Systems (LASCAS), Punta Del Este, Uruguay, February 2024 [Featured on Semiconductor Engineering's Library]

game

Locate: Low-Power Viterbi Decoder Exploration using Approximate Adders
Rajat Bhattacharjya, Biswadip Maity, Nikil Dutt
In the Proceedings of the 33rd ACM Great Lakes Symposium on VLSI (GLSVLSI), Knoxville, TN, USA, June 2023

game

Approximating Communication Systems: Reality or Fantasy?
Ish Kool, Alish Kanani, Rajat Bhattacharjya
28th IEEE International Conference on High Performance Computing, Data, and Analytics (HiPC)- Student Research Symposium, Bangalore, India (Virtual Event), 2021

game

ApproxBioWear: Approximating Additions for Efficient Biomedical Wearable Computing at the Edge
Alish Kanani, Rajat Bhattacharjya, Dip Sankar Banerjee
43rd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), Guadalajara, Mexico (Virtual Event), 2021

game

ACLA: An Approximate Carry-Lookahead Adder with Intelligent Carry Judgement and Correction
Shobhit Belwal, Rajat Bhattacharjya, Kaustav Goswami, Dip Sankar Banerjee
22nd IEEE International Symposium on Quality Electronic Design (ISQED), Santa Clara, California, USA (Virtual Event), 2021 -  (Code)

game

SEAMBA: A Semi-Approximate Multiplier using Block-Based Approach and Rounding
Arnab Sarkar, Rajat Bhattacharjya, Ashish Goswami, Soumyajit Poddar
The IEEE International Symposium on Devices, Circuits and Systems (ISDCS), Higashi-Hiroshima, Japan (Virtual Event), 2021

game

Disruptive Factors Influencing Women's Education during COVID-19
Rajat Bhattacharjya, Shivika Agrawal, L David Lal
International Conference on Women Empowerment in Science and Technology (ICWEST), Warangal, India (Virtual Event), 2021

game

An Approximate Carry Estimating Simultaneous Adder with Rectification
Rajat Bhattacharjya*, Vishesh Mishra*, Saurabh Singh, Kaustav Goswami, Dip Sankar Banerjee
In the Proceedings of the 30th ACM Great Lakes Symposium on VLSI (GLSVLSI), Beijing, China (Virtual Event), 2020 [Best Paper Award (2nd Place)]
(* Equal contribution)

game

ReARM: A Reconfigurable Approximate Rounding-Based Multiplier for Image Processing
Rajat Bhattacharjya, Alish Kanani, Neeraj Goel
In the Proceedings of the 24th IEEE International Symposium on VLSI Design and Test (VDAT), Bhubaneswar, India (Virtual Event), 2020

game

ACEP: An Accuracy-Configurable Carry Estimating Parallel Adder
Rajat Bhattacharjya, Vishesh Mishra, Saurabh Singh, Kaustav Goswami
26th IEEE International Conference on High Performance Computing, Data, and Analytics (HiPC)- Student Research Symposium, Hyderabad, India, 2019 [Best Poster Award]

Teaching

game

CS147/244P
IoT Software and Systems - Teaching Assistant (Fall 2025)

CS154
Computer Design Lab - Teaching Assistant (Spring 2025)

CS250B
Modern Computer Systems - Teaching Assistant (Winter 2025)

ICS51
Introduction to Computer Organization - Teaching Assistant (Fall 2024)

CS125
Next Generation Search Systems - Teaching Assistant (Winter 2024)

CS250P
Computer Systems Architecture - Teaching Assistant (Fall 2023)
University of California, Irvine

game

CS101 Computer Programming - Teaching Assistant (Monsoon semester 2018)
Indian Institute of Information Technology Guwahati

Service

Miscellaneous

  • Apart from science and technology, I appreciate good art and music. I take particular interest in avant-garde works.
  • I am also an avid quizzer, debater and singer and have won accolades nationally.
  • I love travelling to places and absorbing various cultures. Also, I love playing badminton.
  • The places Haflong and Guwahati are dear to me. I spent my entire childhood and teenage life in these two places.

Last updated: Oct. 2025.
Inspired by his template.