Research Summary

My current research is focused on hardware accelerated training for deep learning. The goal of this research is to speed training to enable network architecture search and learning on edge devices. Much of my previous research concerned digital communictation theory, including coding, modulation, and adaptive receiver processing. In many cases, I follow-up research in algorithm development by collaboratiing to consider digital hardware implementation.

USC Hardware Accelerated Learning (HAL) Research Group

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Publications

Below are some selected publications and patents.

Google Scholar Page

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Selected Recent Publications

• Hassan Hamad, Abhinav Kumar Thakur, Nijil Kolleri, Sujith Pulikodan, Keith Chugg:
  FIRE: A Dataset for Financial Relation Extraction
  Findings of the Association for Computational Linguistics: NAACL, 2024.

• Daniel Beauchamp, Keith M. Chugg:
  Analysis and Calibration for Wideband Times-2 Interleaved Current-Steering DACs
  IEEE Transactions on Circuits and Systems I (regular papers), 2022.

• Mengkun Ji, Keith M. Chugg,:
  Analysis of the Average Sampling Frequency for Level Crossing Analog-to-Digital Converters
  IEEE Conference on Military Communications (MILCOM), November 2021.

• S. Dey, S. Babakniya, S. Kanala, M. Paolieri, L. Golubchik, P.A. Beerel, K.M. Chugg,:
  Deep-n-Cheap: An Automated Efficient and Extensible Search Framework for Cost-Effective Deep Learning
  SN Computer Science, 2021

• Arnab Sanyal, Peter Beerel, Keith M. Chugg:
  Neural Network Training with Approximate Logarithmic Computations
  IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), 2020.

• Souvik Kundu, Mahdi Nazemi, Massoud Pedram, Keith M. Chugg, Peter Beerel:
  Pre-defined Sparsity for Low-Complexity Convolutional Neural Networks
  IEEE Transactions on Computers, 2020.

• Sourya Dey, Kuan-Wen Huang, Peter A. Beerel, Keith M. Chugg:
  Pre-Defined Sparse Neural Networks with Hardware Acceleration
  IEEE Journal on Emerging and Selected Topics in Circuits and Systems (JETCAS), 2019

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Iterative and Adaptive Detection/Decoding/Processing (Selected Publications)

• K. M. Chugg, A. Anastasopoulos, X. Chen:
  Iterative Detection: Adaptivity, Complexity Reduction, and Applications
  Kluwer Academic Publishing, 2001 (book)

• A. Anastasopoulos, K. M. Chugg:
  Adaptive soft-input soft-output algorithms for iterative detection with parametric uncertainty
  IEEE Transactions on Communications, 2000

• K. M. Chugg, A. Polydoros:
  MLSE for an unknown channel, Part I. Optimality considerations
  IEEE Transactions on Communications, 1996

• K. M. Chugg, M. Zhu:
  A new approach to rapid PN code acquisition using iterative message passing techniques
  IEEE Transactions on Communications, 2005

• A. Anastasopoulos, K. M. Chugg:
  Adaptive iterative detection for phase tracking in turbo-coded systems
  IEEE Transactions on Communications, 2001

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Error Correction Coding (Selected Publications)

• K. M. Chugg Chugg, P. Thiennviboon, G. Dimou, P. Gray, J. Melzer:
  A New class of turbo-like codes with universally good performance and high-speed decoding
  IEEE Military Communications Conference (MILCOM), 2005 (hardware curves)

• T. R. Halford, K. M. Chugg:
  The extraction and complexity limits of graphical models for linear codes
  IEEE Transactions on Information Theory, 2008

• T. R. Halford, K. M. Chugg:
  Random redundant iterative soft-in soft-out decoding
  IEEE Transactions on Communications, 2008

• M. Zhu, K. M. Chugg:
  Bounds on the expansion properties of Tanner graphs
  IEEE Transactions on Information Theory, 2007

• T. R. Halford, M. T. Urie, K. M. Chugg:
  Conditionally cycle-free graphical models for coset codes
  IEEE Transactions on Information Theory, 2012

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Wireless Networking (Selected Publications)

• T. R. Halford, K. M. Chugg:
  Barrage relay networks
  Information Theory and Applications Workshop (ITA), 2010

• A. Blair, T. Brown, K. M. Chugg, M. Johnson:
  Tactical mobile mesh network system design
  IEEE Military Communications Conference (MILCOM), 2007

• T. R. Halford, K. M. Chugg:
  The stability of multihop transport with autonomous cooperation
  IEEE Military Communications Conference (MILCOM), 2011

• H. Qiu, K. Wang, K. Psounis, G. Caire, and K. M. Chugg:
  High-rate Wi-Fi broadcasting in crowded scenarios via lightweight coordination of multiple access points
  ACM MobiHoc Conference, 2016

• T.R. Halford, T. Courtade, K.M. Chugg, X. Li, G. Thatte:
  Energy-efficient group key agreement for wireless networks
  IEEE Transactions on Wireless Communications, 2015

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Digital Hardware Architectures (Selected Publications)

• J. Cromwell, G. Paparisto, and K. M. Chugg:
  On the design and hardware demonstration of a robust, high-speed frequency-hopped radio for severe battlefield channels
  IEEE Military Communications Conference (MILCOM), 2002

• P. A. Beerel, K. M. Chugg:
  A low latency SISO with application to broadband turbo decoding
  IEEE Journal of Selected Areas in Communications (JSAC), 2001

• O. W. Yeung, K. M. Chugg:
  An Iterative Algorithm and Low Complexity Hardware Architecture for Fast Acquisition of PN Codes in UWB Systems
  Springer J. VLSI Signal Processing (special issue on Ultrawideband Systems), 2006

• P. A. Beerel, K. M. Chugg, G. Dimou, P. Golani, M. Prakash:
  Ansychronous logic implementation of tree-structured SISOs
  IEEE Information Theory Workshop (ITW), 2007

• S. Singh, P. Thiennviboon, R. Ozdag, S. Tugsinavisut, R. Chokkalingam, P. A. Beerel, and K. M. Chugg:
  Algorithm and circuit co-design for a low-power sequential decoder
  Asilomar Conference on Signals, Systems, and Computers, 1999

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Selected Patents

• K. M. Chugg, M. Johnson:
  Method and System for Cooperative Communication with Minimal Coordination
  US Patent 8,576,946. Filed Oct. 6, 2007, issued Nov. 5, 2013.

• K. M. Chugg, P. K. Gray, G. Dimou, P. Thiennviboon:
  Method and apparatus for communications using turbo like codes
  US Patent 7,958,425. Filed Feb. 16, 2005, issued June 7, 2011.

• P. A. Beerel, K. M. Chugg, G. Dimou, P. Thiennviboon:
  Reduced-latency soft-in/soft-out module
  US Patent 7,197,691, filed June 24, 2004, awarded March 27, 2007.

• K. M. Chugg, A. Anastasopoulos:
  Adaptive iterative detection
  US Patent 77,092,457, filed Jan. 18, 2001, awarded Aug. 22, 2006.

• K. M. Chugg, O. W. Yeung:
  Pseudo Noise Sequence Acquisition in Spread Spectrum Systems
  US Patent 8,069,015, Filed April 20, 2007 issued Nov 29, 2011.