Signal Processing & Artificial-intelligence Laboratory

Publications

Preprint/under review

  1. J. H. Yoo, S. H. Park, and J. W. Choi, "ScarfNet: Multi-scale features with deeply fused and redistributed semantics for enhanced object detection", https://arxiv.org/abs/1908.00328.
  2. J. H. Yoo, S. H. Lim, and J. W. Choi, "Estimation of dynamically varying support of sparse signals via sequential Monte-Carlo method," submitted to IEEE Trans. Signal Processing.
  3. S. H. Lim, J. Bae, S. Kim, B. Shim, and J. W. Choi, "Efficient beam training and channel estimation for millimeter wave communications under mobility," submitted to IEEE Trans. Communications. [pdf]

International Journals / Highlighted Conference Papers

2019

  1. S. A. Irtaza, S. H. Lim, and J. W. Choi, "Greedy data-aided active user detection for massive machine type communications," accepted for IEEE Wireless Communications Letter, vol 8, no. 4, pp. 1224-1227, Aug. 2019. [pdf]
  2. J. Lee and J. W. Choi, "May I cut into your lane?: A policy network to learn interactive lane change behavior for autonomous driving," accepted for International Conference on Intelligent Transportation System (ITSC) 2019.
  3. [C] Y. Kim, J. Kim, J. Koh, and J. W. Choi, "Enhanced object detection in bird’s eye view using 3D global context inferred from Lidar point data" accepted for IEEE Intelligent Vehicles Symposium (IV) 2019.


2018

  1. [C] J. Kim, J. Koh, Y. Kim, J. Choi, Y. Hwang, and J. W. Choi, "Robust deep multi-modal learning based on gated information fusion network," Asian Conference on Computer Vision (ACCV) 2018. [pdf]
  2. [C] S.H. Park, B. Kim, C. M. Kang, C. C. Chung, and J. W. Choi, "Sequence-to-sequence prediction of vehicle trajectory via LSTM encoder-decoder architecture," IEEE Intelligent Vehicles Symposium (IV) 2018. (among 5% selected as single track oral presentation). [pdf]
  3. [C] J. Kim, J. Choi, Y. Kim, J. Koh, C. C. Chung, and J. W. Choi, "Robust camera lidar sensor fusion via deep gated fusion network," IEEE Intelligent Vehicles Symposium (IV) 2018. (among 5% selected as single track oral presentation). [pdf]

2017

  1. S. Park, J. W. Choi, J. Seol and B. Shim, "Expectation-maximization based channel estimation for multi-user MIMO systems," IEEE Trans. Communications, vol. 65, no. 6, pp. 2397-2410, June 2017. [pdf]
  2. J. W. Choi, B. Shim, Y. Ding, B. Rao, and D. I. Kim, "Compressed sensing for wireless communications: useful tips and tricks," IEEE Communications Surveys and Tutorials, vol. 19, no. 3, pp. 1527-1550, Thirdquarter 2017. [pdf]
  3. J. W. Choi and B. Shim, "Detection of large-scale wireless systems via sparse error recovery," IEEE Trans. Signal Processing, vol. 65, no. 22, pp. 6038-6052, Nov. 2017. [pdf]
  4. I. Chang, S. Park and J. W. Choi, "Energy-efficient arithmetic units via voltage over-scaling with bit exact timing error cancellation," Circuits, Systems and Signal processing, vol. 36, no. 11, pp. 4309-4325, Nov. 2017. [pdf]
  5. S. Chang, H. Park, J. W. Choi, J. Choi, "Source transmission with unequal frequency reuses in MIMO cellular networks," IEEE Trans. Communications, vol. 65, no. 10, pp. 4188-4204, Oct. 2017. [pdf]
  6. J. H. Lee, J. Kim, B. Kim. D. Yoon, J. W. Choi, "Robust blind modulation classification technique for fading channels via deep neural network," Entropy, 19(9), 2017 [pdf]
  7. J. Suhanya, J. W. Choi, and S. Kim, "Robust beam-tracking for mmWave communications," IEEE Communications Letter, vol. 21, no. 12, pp. 2654-2657, Dec. 2017. [pdf]
  8. [C] J. Yoo, S. Kim, B. Shim, and J. W. Choi, "Sampling-based tracking of time-varying channels for millimeter wave-band communications," International Conference on Communication (ICC) May 2017. [pdf]
  9. [C] B. Kim, C. M. Kang, C. C. Chung, S. H. Lee, and J. W. Choi, "Vehicle trajectory prediction over occupancy grid map via recurrent neural network," International Conference on Intelligent Transportation System (ITSC) 2017 Workshop. [pdf]
  10. [C] H. Chae, C. M. Kang, C. C. Chung, and J. W. Choi, "Autonomous braking system via deep reinforcement learning," International Conference on Intelligent Transportation System (ITSC) 2017. [pdf]

2016

  1. J. Lee, J. W. Choi, and B. Shim, "Sparse signal recovery via tree search matching pursuit," Journal of Communication and Networks, vol. 18, no. 5, pp. 699-712, Nov. 2016. [pdf]
  2. [C] S. Ka, T. H. Kim, J. Y. Ha, S. H. Lim, S. C. Shin, J. W. Choi, C. Kwak, and S. Choi, "Near-ultrasound communication model design for TV's 2nd screen services," MOBICOM 2016 (Accept ratio = 14.16% = 32/226) [pdf]
  3. [C] B. Kim, J. Kim. H. Chae, D. Yoon, and J. W. Choi, "Deep neural network-based automatic modulation classification technique," ICTC 2016. [pdf]

2015

  1. J. W. Choi and B. Shim, "Statistical recovery of simultaneously sparse time-varying signals from multiple measurement vectors," IEEE Trans. Signal Processing, vol. 63, no. 22, pp. 6136-6148, Nov. 2015. [pdf]
  2. J. W. Choi, B. Lee, and B. Shim, "Iterative group detection and decoding for large MIMO systems", Journal of Communication and Networks, vol 17, no. 6, Dec. 2015. [pdf]
  3. S. Park, B. Shim, and J. W. Choi, "Iterative channel estimation using virtual pilot signals for MIMO-OFDM systems," IEEE Trans. Signal Processing, vol 63, no. 12, pp. 3032-3045, June 2015. [pdf]
  4. J. W. Choi, B. Shim, and S. Chang, "Downlink pilot reduction for massive MIMO systems via compressed sensing," IEEE Communications Letter, vol. 19, no. 11, pp. 1889-1892, Nov. 2015. [pdf]
  5. C. Kim, J. Kim, and J. W. Choi, "LQ-servo design with reduced order observer for two-wheeled self-balancing robot based on HIL simulations," International Journal of Control and Automation, vol. 8, no. 12, pp. 13-26, August 2015. [pdf]
  6. [Conference] H. Lee, T. H. Kim, J. W. Choi, and S. Choi, "Chirp signal-based aerial acoustic communication for smart devices," INFOCOM 2015, (Acceptance ratio 19% = 316/1640) [pdf]

Prior to 2015

  1. K. Kim, J. W. Choi, S. S. Kozat, and A. C. Singer, "Low complexity turbo equalization: a clustering approach," IEEE Communication Letters, vol. 18, pp. 1063-1066, June 2014. [pdf]
  2. J. W. Choi, B. Shim, and A. C. Singer, "Efficient soft-input soft-output tree detection via an improved path metric," IEEE Trans Information Theory, vol. 58, pp. 1518-1533, March 2012. [pdf]
  3. B. Shim, J. W. Choi, and I. Kang, "Towards the performance of ML and the complexity of MMSE - A hybrid approach for multiuser detection," IEEE Trans Wireless Communications, vol. 11, pp. 2508-2519, July 2012.
  4. H. Wan, R. Chen, J. W. Choi, A. C. Singer, J. C. Preisig, and B. Farhang-Boroujeny, "Markov chain monte carlo detection for frequency-selective channels using list channel estimates," IEEE Journal on Selected Topics on Signal Processing, vol. 5, pp. 1537-1547, Dec. 2011.
  5. J. W. Choi, T. J. Riedl, K. Kim, A. C. Singer, and J. C. Preisig, "Adaptive linear turbo equalization over doubly selective channels," IEEE Journal of Oceanic Engineering, vol. 36, pp. 473-489, Oct. 2011.
  6. J. W, Choi, B. Shim, Andrew C. Singer, and N. I Cho, "A low complexity near-ML decoding via reduced dimension maximum likelihood search," IEEE Trans Signal Processing, vol. 58, pp. 1780-1794, March 2010.
  7. J. W. Choi, A. C. Singer, J. W. Lee, and N. I. Cho, "Improved linear soft-input soft-output detection via soft feedback successive interference cancellation," IEEE Trans. Communications., vol. 58, pp. 986-996, March 2010.
  8. J. W. Choi, B. Shim, A. C. Singer, and N. I. Cho, "Low-power filtering via minimum power soft error cancellation," IEEE Trans. Signal Processing, vol. 55, pp. 5084-5096, Oct. 2007.
  9. J. W. Choi and N. I. Cho, "Suppression of narrow-band interference in DS-spread spectrum systems using adaptive IIR notch filter," Signal Processing, vol 82, pp. 2003-2013, Dec. 2002.

International Conferences

  1. S. H. Lim, J. H. Lim, S. Kim, and J. W. Choi, "Greedy recovery of sparse signals with dynamically varying support," accepted for EUSIPCO 2018.
  2. J. Bae, S. H. Lim, J. H. Yoo, B. Shim, and J. W. Choi, "Dedicated beam-based channel training technique for millimeter-wave communications with high mobility", accepted for EUSIPCO 2018.
  3. J. Bae, S. H. Lim, J. H. Yoo, and J. W. Choi, "New beam tracking technique for millimeter wave communications," arXiv. [pdf]
  4. H. Ji, J. W. Choi, and B. Shim, "Channel sparsification beamforming for Internet of Things systems", accepted for ICC 2017.
  5. J. Yoo, J. Bae, S. Lim, S. Kim, B. Shim, and J. W. Choi, "Sampling-based tracking of time varying channels for millimeter wave-band communications," accepted for ICC 2017.
  6. B. Kim, J. Kim. H. Chae, D. Yoon, and J. W. Choi, "Deep neural network-based automatic modulation classification technique," ICTC 2016.
  7. J. Yoo, A. I. Syed, B. Shim, and J. W. Choi, "Kalman-based time-varying sparse channel estimation," ICCS 2016.
  8. S. Park, J. W. Choi, J. Seol, and B. Shim, "Virtual pilot-based channel estimation and multiuser detection for multiuser MIMO in LTE-Advanced," VTC 2016-fall, Montreal Canada.
  9. S. Ka, T. H. Kim, J. Y. Ha, S. H. Lim, S. C. Shin, J. W. Choi, C. Kwak, and S. Choi, "Near-ultrasound communication model design for TV's 2nd screen services," accepted for Mobicom 2016 (Accept ratio = 14.16% = 32/226)
  10. J. W. Choi and B. Shim, "Compressed sensing-based pilot reduction technique for massive MIMO systems," Information Theory and Appliation (ITA), Feb 2015.
  11. H. Lee, T. H. Kim, J. W. Choi, and S. Choi, "Chirp signal-based aerial acoustic communication for smart devices," accepted for INFOCOM 2015, Hong Kong (Acceptance ratio - 19% = 316/1640)
  12. J. W. Choi and B. Shim, "New approach for massive MIMO detection via sparse error recovery," IEEE Proc. Globecom pp. 3754-3759, Dec. 2014.
  13. J. W. Choi, B. Lee, B. Shim, and I. Kang, "Low complexity soft-input soft-output group detection for massive MIMO systems," Proc. of IEEE international conference on communications (ICC) 2013.
  14. J. W. Choi, B. Lee, I. Kang, and B. Shim, "Low complexity detection and precoding for massive MIMO systems," Proc. of IEEE wireless communications and networking conference (WCNC) 2013.
  15. J. W. Choi, B. Shim, and A. C. Singer, "Linear estimate-based look-ahead path metric for efficient soft-input soft-output tree detection," Information Theory Proceedings (ISIT), 2010, pp. 804-808.
  16. J. W. Choi, B. Shim, and A. C. Singer, “On the improved path metric for soft-input soft-output tree detection," Information Theory and Application Workshop (ITA), 2010, pp. 1-5. (Nominated as one of three excellent candidates seeking academic positions in UIUC)
  17. H. Wan, R. Chen, J. W. Choi, A. C. Singer, J. C. Preisig, and B. Farhang-Boroujeny, “Stochastic expectation maximization algorithm for long-memory fast-fading channels,” Global Telecommunications Conference (Globecom), 2010, pp. 1-5.
  18. J. W. Choi, T. Riedl, E. Daly, K. Kim, A. C. Singer, and J. Preisig, “Adaptive linear turbo equalization of large delay spread time-varying channel responses,” Sensor Array and Multichannel Signal Processing Workshop (SAM), 2010, pp. 77-80.
  19. A. C. Singer, A. J. Bean, and J. W. Choi, “Mutual information and time interleaved analog to digital converters,” IEEE Workshop on Information Theory and its Application (ITA), Jan. 2010, pp. 1-5.
  20. T. Riedl, A. C. Singer, and J. W. Choi, “Learning in Gaussian Markov random fields,” Acoustics Speech and Signal Processing (ICASSP), 2010, pp. 3070-3073.
  21. K. Kim, J. W. Choi, A. C. Singer, K. Kim, “A new adaptive turbo equalizer with soft information classification,” Acoustics Speech and Signal Processing (ICASSP), 2010, pp. 3206-3209.
  22. H. Wan, R. Chen, J. W. Choi, A. C. Singer, J. Preisig, and B. Farhang-Boroujeny, “Markov chain Monte Carlo detection for underwater acoustic channels,” Information Theory and Application Workshop (ITA), 2010, pp. 1-5.
  23. J. W. Choi, B. Shim, J. K. Nelson, and A. C. Singer, “Efficient soft-input soft-output MIMO detector via improved M-algorithm,” IEEE International Conference on Communications (ICC), 2010, pp. 1-5.
  24. J. W. Choi, T. J. Riedl, K. Kim, A. C. Singer, and J. C. Preisig, “Practical application of turbo equalization to underwater acoustic communications,” Wireless Communication Systems (ISWCS), 2010, pp. 601-605. ICASSP 2010.
  25. T. Riedl, J. W. Choi, and A. C. Singer, “Channel estimation by inference on Gaussian Markov random fields,” Signals, Systems and Computers Asilomar Conference, Nov. 2009, pp. 1007-1011.
  26. J. W. Choi, B. Shim, and A. C. Singer, “Near-ML detection over a reduced dimension hypersphere,” Global Telecommunications Conference (Globecom) Dec. 2009, pp. 1-6.
  27. T. J. Riedl, J. W. Choi, and A. C. Singer, “Channel estimation by inference on Gaussian Markov random fields,” Signals, Systems and Computers Asilomar Conference, Nov. 2009, pp. 620-624.
  28. J. W. Choi, K. Kim, T. J. Riedl, and A. C. Singer, “Iterative estimation of sparse and doubly-selective multi-input multi-output (MIMO) channel,” Signals, Systems and Computers Asilomar Conference, Nov. 2009, pp. 620-624.
  29. B. Shim, J. W. Choi, I. Kang, “Towards the performance of ML and the complexity of MMSE - A Hybrid approach,” Global Telecommunications Conference (Globecom), Nov. 2008, pp. 1-5.
  30. J. W. Choi, R. J. Drost, A. C. Singer, and J. C. Preisig, “Iterative multi-channel equalization and decoding for high frequency underwater acoustic communications,” IEEE Sensor Array and Multichannel Signal Processing Workshop (SAM), July 2008, pp. 127-130.
  31. J. W. Choi, B. Shim, A. C. Singer, and N. I. Cho, “A low-complexity near-ML decoding technique via reduced dimension list stack algorithm (RD-LSA),” IEEE Sensor Array and Multi-channel Signal Processing Workshop (SAM) 2008, July 2008, pp. 41-44.
  32. J. W. Choi, A. C. Singer, J. W. Lee, and N. I. Cho, “An improved soft feedback V-BLAST detection technique for TURBO-MIMO systems,” IEEE International Conference on Acoustics, Speech and Signal Processing Conference (ICASSP), March 2008, pp. 3181-3184.
  33. J. W. Choi, A. C. Singer, and N. I. Cho, “Low-power adaptive FIR equalizer via soft error cancellation,” IEEE International Conference on Acoustics, Speech and Signal Processing Conference (ICASSP), May 2006, pp. 14-19.
  34. J. W. Choi, B. Shim, A. C. Singer, N. I. Cho, “Energy-efficient digital filtering using ML-based error correction (ML-EC) technique,” IEEE International Conference on Acoustics, Speech and Signal Processing Conference (ICASSP), Mar. 2005, pp. 18-23.
  35. J. W. Choi and N. I. Cho, “Narrow-band interference suppression in direct sequence spread spectrum systems using a lattice IIR notch filter,” IEEE International Conference on Acoustics, Speech and Signal Processing Conference (ICASSP), May 2001, pp. 2237-2240.