index

Research

  • Distributed Storage System

    Distributed storage system is a network of storage nodes to store data reliably over a long period of time. We focus on network coding for distributed storage, considering bandwidth efficiency, latency and security issues. [4-7]



  • Artificial Intelligence

    We focus on developing clustered neural network with an external memory for high speed/adaptive meta learning. Both theoretical and experimental analyses are ongoing.




  • 3D NAND Flash

    Recently, 3D NAND flash has been introduced to replace 2D NAND flash. We investigate equalization techniques and error-correction coding algorithms to reduce the error rate of 3D NAND flash.



  • 5G Communications

    Pilot Reuse Strategies in Massive MIMO Systems. We proposed pilot reuse methods which effectively mitigate pilot contamination and increase the net throughput. [1,11]



    New Waveform Design for 5G low-latency Communications. We investigate ways of improving OFDM by combining windowing and filtering. [2]



  • System Error-Correction Codes (ECCs)

    Error-correction codes (ECCs) for storage applications are under study with a particular focus on the tradeoffs and efficient allocation of resources throughout the system. [3, 8-10, 12]





  • References

    [1] J. Sohn, S. W. Yoon and J. Moon, "Pilot Reuse Strategy Maximizing the Weighted-Sum-Rate in Massive MIMO Systems," IEEE Journal on Selected Areas in Communications, vol. 35, no. 8, pp. 1728-1740, Aug. 2017.
    [2] D.-J. Han, J. Moon, D. Kim, S.-Y. Chung and Y. Lee, "Combined Subband-Subcarrier Spectral Shaping in Multi-Carrier Modulation under the Excess Frame Length Constraint," IEEE Journal on Selected Areas in Communications, vol. 35, no. 6, pp. 1339-1352, June 2017.
    [3] S. W. Yoon and J. Moon, "Low-Complexity Concatenated Polar Codes with Excellent Scaling Behavior," 2017 IEEE International Conference on Communications (ICC) Workshop on Channel Coding for 5G and Future Networks, May. 2017.
    [4] H. Park and J. Moon, "Improving Read Access Time of High-Performance Solid-State Drives via Layered Coding Schemes," 2017 IEEE International Conference on Communications (ICC), May. 2017.
    [5] J. Sohn, B. Choi, S. W. Yoon and J. Moon, "Capacity of Clustered Distributed Storage," 2017 IEEE International Conference on Communications (ICC), May. 2017 (won the Best Paper Award of the conference).
    [6] B. Choi, J. Sohn, S. W. Yoon and J. Moon, "Secure Clustered Distributed Storage Against Eavesdroppers," 2017 IEEE International Conference on Communications (ICC), May. 2017.
    [7] D. Lee, H. Park and J. Moon, "Reducing repair-bandwidth using codes based on factor graphs," 2016 IEEE International Conference on Communications (ICC), Kuala Lumpur, May. 2016.
    [8] S. Kang, J. Moon, J. Ha and J. Shin, "Breaking the Trapping Sets in LDPC Codes: Check Node Removal and Collaborative Decoding," in IEEE Transactions on Communications, Jan. 2016.
    [9] J. Oh, J. Ha, H. Park and J. Moon, "RS-LDPC Concatenated Coding for the Modern Tape Storage Channel," in IEEE Transactions on Communications, Jan. 2016.
    [10] S. W. Yoon and J. Moon, "Two-Dimensional Error-Pattern-Correcting Codes," in IEEE Transactions on Communications, Aug. 2015.
    [11] J. Y. Sohn, S. W. Yoon and J. Moon, "When pilots should not be reused across interfering cells in massive MIMO," 2015 IEEE International Conference on Communication Workshop (ICCW), London, 2015 (won the Qualcomm Innovation Award in 2015).
    [12] G. Yu and J. Moon, "Concatenated Raptor Codes in NAND Flash Memory," in IEEE Journal on Selected Areas in Comm., May 2014.


  • Copyright ⓒ Communication and Storage Laboratory, 2017
    School of Electrical Engineering, Korea Advanced Institute of Science and Technology
    291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea

    KAIST