Young-Chai Ko

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Young-Chai Ko

Professor

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1999 …2025

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  • 2013

    Filter design of interference alignment scheme with limited feedback for two-cell interfering MIMO-MAC

    Kim, M. J., Ko, Y. C. & Lee, H. H., 2013, 2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2013. p. 1201-1206 6 p. 6666321. (IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    3 Citations (Scopus)

  • Optimal sounding signal design based on MMSE criterion in OFDM system

    Jo, J. H., Jo, K. T., Ko, Y. C. & Choi, S., 2013, 2013 International Conference on ICT Convergence: "Future Creative Convergence Technologies for New ICT Ecosystems", ICTC 2013. IEEE Computer Society, p. 583-584 2 p. 6675425. (International Conference on ICT Convergence).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • 2012

    Inter-cell interference cancelation schemes using alternate relay transmission

    Kwon, J. W., Park, S. H. & Ko, Y. C., 2012, IEEE 75th Vehicular Technology Conference, VTC Spring 2012 - Proceedings. 6240305. (IEEE Vehicular Technology Conference).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Interference alignment with random vector quantization for MIMO interference channels

    Lee, H. H. & Ko, Y. C., 2012, 2012 IEEE Vehicular Technology Conference, VTC Fall 2012 - Proceedings. 6399166. (IEEE Vehicular Technology Conference).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    16 Citations (Scopus)

  • Linear transceiver design based on interference alignment for MIMO heterogeneous networks

    Lee, H. H. & Ko, Y. C., 2012, 2012 IEEE 23rd International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2012. p. 1645-1650 6 p. 6362612. (IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    10 Citations (Scopus)

  • On the achievable degrees of freedom of alternate MIMO relaying with multiple AF relays

    Park, K. H., Alouini, M. S., Park, S. H. & Ko, Y. C., 2012, 3rd International Conference on Communications and Networking, ComNet 2012. 6217739. (3rd International Conference on Communications and Networking, ComNet 2012).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    5 Citations (Scopus)

  • Outage probability of an amplify-and-forward relaying system in an interference-limited Weibull fading environment

    Choi, K. S., Lee, H. H. & Ko, Y. C., 2012, 2012 IEEE International Conference on Wireless Information Technology and Systems, ICWITS 2012. 6417723. (2012 IEEE International Conference on Wireless Information Technology and Systems, ICWITS 2012).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    4 Citations (Scopus)

  • Outage probability of decode-and-forward relaying system with Weibull distributed multiple co-channel interferences

    Choi, K. S., Lee, H. H. & Ko, Y. C., 2012, 2012 IEEE Globecom Workshops, GC Wkshps 2012. p. 122-127 6 p. 6477556. (2012 IEEE Globecom Workshops, GC Wkshps 2012).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    3 Citations (Scopus)

  • Transceiver design based on interference alignment for MIMO interfering broadcast channels

    Lee, H. H., Kim, M. J. & Ko, Y. C., 2012, 2012 IEEE Global Communications Conference, GLOBECOM 2012. p. 5044-5049 6 p. 6503920. (Proceedings - IEEE Global Communications Conference, GLOBECOM).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    11 Citations (Scopus)
  • 2011

    A novel PAPR reduction scheme with low complexity in time domain for OFDM system

    Eom, S. S. & Ko, Y. C., 2011, 2011 IEEE International Conference on Communications, ICC 2011. 5962969. (IEEE International Conference on Communications).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • A novel power and offset allocation method for spatial multiplexing MIMO Systems in optical wireless channels

    Park, K. H., Ko, Y. C. & Alouini, M. S., 2011, 2011 IEEE GLOBECOM Workshops, GC Wkshps 2011. p. 823-827 5 p. 6162569. (2011 IEEE GLOBECOM Workshops, GC Wkshps 2011).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    7 Citations (Scopus)

  • Cooperative joint precoding for relay enhanced cellular system over Nakagami-m fading channels

    Kwon, J. W., Park, K. H., Ko, Y. C. & Yang, H. C., 2011, 2011 IEEE 7th International Conference on Wireless and Mobile Computing, Networking and Communications, WiMob'2011. p. 208-213 6 p. 6085402. (International Conference on Wireless and Mobile Computing, Networking and Communications).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Coordinated multi-cell MU-MIMO downlink transmission with adaptive beam deactivation

    Lee, J. H., Ko, Y. C., Choi, S., Yang, H. C. & Kim, S., 2011, 2011 IEEE 7th International Conference on Wireless and Mobile Computing, Networking and Communications, WiMob'2011. p. 199-203 5 p. 6085404. (International Conference on Wireless and Mobile Computing, Networking and Communications).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    1 Citation (Scopus)

  • Interference alignment for degrees of freedom improvement in 3-relay half-duplex systems

    Park, S. H., Ko, Y. C., Park, K. H. & Alouini, M. S., 2011, ICICS 2011 - 8th International Conference on Information, Communications and Signal Processing. 6173521. (ICICS 2011 - 8th International Conference on Information, Communications and Signal Processing).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • K-user MIMO X network system with perfect interference alignment

    Park, S. H. & Ko, Y. C., 2011, 2011 IEEE International Conference on Communications, ICC 2011. 5962832. (IEEE International Conference on Communications).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    10 Citations (Scopus)

  • Low complexity symbol-wise beamforming for MIMO-OFDM systems

    Lee, H. H., Park, K. H., Yang, H. C. & Ko, Y. C., 2011, 2011 IEEE Global Telecommunications Conference, GLOBECOM 2011. 6133725. (GLOBECOM - IEEE Global Telecommunications Conference).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    3 Citations (Scopus)

  • Novel node pair selection algorithms for sum-rate enhancement in MIMO interference channel

    Kim, M. J., Lee, H. H., Ko, Y. C. & Park, S., 2011, ICICS 2011 - 8th International Conference on Information, Communications and Signal Processing. 6174247. (ICICS 2011 - 8th International Conference on Information, Communications and Signal Processing).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    1 Citation (Scopus)

  • On the power and offset allocation for rate adaptation of spatial multiplexing in optical wireless MIMO channels

    Park, K. H., Ko, Y. C. & Alouini, M. S., 2011, IWCMC 2011 - 7th International Wireless Communications and Mobile Computing Conference. p. 141-146 6 p. 5982521. (IWCMC 2011 - 7th International Wireless Communications and Mobile Computing Conference).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    6 Citations (Scopus)

  • Symbol-wise beamforming with limited feedback for MIMO-OFDM systems

    Lee, H. H. & Ko, Y. C., 2011, 2011 IEEE 73rd Vehicular Technology Conference, VTC2011-Spring - Proceedings. 5956650. (IEEE Vehicular Technology Conference).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    1 Citation (Scopus)
  • 2010

    Adaptive multiuser MIMO transmission in wireless systems with cooperating cells

    Lee, J. H., Ko, Y. C. & Yang, H. C., 2010, 2010 IEEE 6th International Conference on Wireless and Mobile Computing, Networking and Communications, WiMob'2010. p. 386-391 6 p. 5645037. (2010 IEEE 6th International Conference on Wireless and Mobile Computing, Networking and Communications, WiMob'2010).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Discrete-rate adaptation schemes in multi-channel systems with finite-length buffer

    Lee, S. D., Won, J. J., Park, K. H. & Ko, Y. C., 2010, ICT 2010: 2010 17th International Conference on Telecommunications. p. 171-176 6 p. 5478644. (ICT 2010: 2010 17th International Conference on Telecommunications).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Efficient codebook-based symbol-wise beamforming for millimeter-wave WPAN system

    Lee, H. H. & Ko, Y. C., 2010, Proc. 2010 ACM Int.Workshop on mmWave Communications: From Circuits to Networks, mmCom '10, Co-located with MobiCom'10 and 11th ACM Int. Symp. on Mobile Ad Hoc Networking and Computing, MobiHoc'10. Association for Computing Machinery, p. 21-25 5 p. (Proceedings of the Annual International Conference on Mobile Computing and Networking, MOBICOM).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    1 Citation (Scopus)

  • Low complexity MIMO beamforming scheme for millimeter-wave wireless personal area network

    Lee, H. H., Jeon, T. & Ko, Y. C., 2010, EuCAP 2010 - The 4th European Conference on Antennas and Propagation. 5505336. (EuCAP 2010 - The 4th European Conference on Antennas and Propagation).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    2 Citations (Scopus)

  • Maximizing the spectral efficiency of amplify-and-forward relaying systems over Nakagami-m fading

    Kwon, J. W., Hwang, K. S., Ko, Y. C. & Yang, H. C., 2010, 2010 IEEE 72nd Vehicular Technology Conference Fall, VTC2010-Fall - Proceedings. 5594310. (IEEE Vehicular Technology Conference).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • On the diversity enhancement and power balancing of per-subcarrier antenna selection in OFDM systems

    Park, K. H., Ko, Y. C. & Alouini, M. S., 2010, 2010 IEEE 72nd Vehicular Technology Conference Fall, VTC2010-Fall - Proceedings. 5594473. (IEEE Vehicular Technology Conference).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • On the spectral efficiency of amplify-and-forward relay systems with adaptive M-QAM

    Kwon, J. W., Ko, Y. C. & Yang, H. C., 2010, 2010 IEEE International Conference on Wireless Information Technology and Systems, ICWITS 2010. 5612253. (2010 IEEE International Conference on Wireless Information Technology and Systems, ICWITS 2010).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • RF beamforming considering RF characteristics in MIMO system

    Jo, K. T., Ko, Y. C. & Yang, H. C., 2010, 2010 International Conference on Information and Communication Technology Convergence, ICTC 2010. p. 403-408 6 p. 5674816. (2010 International Conference on Information and Communication Technology Convergence, ICTC 2010).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    1 Citation (Scopus)
  • 2009

    Accurate approximations and asymptotic results for the sum-rate of random beamforming for multi-antenna gaussian broadcast channels

    Park, K. H. & Ko, Y. C., 2009, VTC Spring 2009 - IEEE 69th Vehicular Technology Conference. 5073356. (IEEE Vehicular Technology Conference).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    10 Citations (Scopus)

  • Channel allocation and rate adaptation for relayed transmission over correlated fading channels

    Hwang, K. S., Hossain, M. J., Ko, Y. C. & Alouini, M. S., 2009, 2009 IEEE 20th Personal, Indoor and Mobile Radio Communications Symposium, PIMRC 2009. Institute of Electrical and Electronics Engineers Inc., p. 1477-1481 5 p. 5450001. (IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    2 Citations (Scopus)

  • Hybrid M-QAM with adaptive modulation and selection combining in MIMO systems

    Lee, S. D. & Ko, Y. C., 2009, Communications Infrastructure: Systems and Applications in Europe - First International ICST Conference, EuropeComm 2009, Revised Selected Papers. p. 91-100 10 p. (Lecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering; vol. 16 LNICST).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Low complexity cooperative communication with switched relay selection and adaptive modulation

    Hwang, K. S., Ko, Y. C. & Alouini, M. S., 2009, VTC Spring 2009 - IEEE 69th Vehicular Technology Conference. 5073652. (IEEE Vehicular Technology Conference).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    6 Citations (Scopus)

  • Low complexity coordinated beamforming in 2-user MIMO systems

    Park, K. H., Ko, Y. C., Alouini, M. S. & Kim, J. S., 2009, Proceedings - 2009 IEEE International Conference on Communications, ICC 2009. Institute of Electrical and Electronics Engineers Inc., 5199150. (IEEE International Conference on Communications).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    4 Citations (Scopus)

  • Low complexity transmit antenna selection with power balancing in OFDM systems

    Park, K. H., Ko, Y. C. & Alouini, M. S., 2009, 2009 IEEE 10th Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2009. p. 359-363 5 p. 5161807. (IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Multiple-antenna post low noise amplifier RF combining

    Jo, K. T., Ko, Y. C., Park, C. G. & Park, J. S., 2009, 2009 IEEE Globecom Workshops, Gc Workshops 2009. 5360684. (2009 IEEE Globecom Workshops, Gc Workshops 2009).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    7 Citations (Scopus)

  • Performance analysis of two-way amplify and forward relaying with adaptive modulation

    Hwang, K. S., Ko, Y. C. & Alouini, M. S., 2009, 2009 IEEE 20th Personal, Indoor and Mobile Radio Communications Symposium, PIMRC 2009. Institute of Electrical and Electronics Engineers Inc., p. 2340-2344 5 p. 5450002. (IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    2 Citations (Scopus)

  • Performance bounds for two-way amplify-and-forward relaying based on relay path selection

    Hwang, K. S., Ko, Y. C. & Alouini, M. S., 2009, VTC Spring 2009 - IEEE 69th Vehicular Technology Conference. 5073783. (IEEE Vehicular Technology Conference).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    71 Citations (Scopus)

  • Physical layer certification system of power line communication Korea standard

    Eom, S., Oh, H. M., Jeon, T., Kim, Y., Lee, J. J., Choi, S. & Ko, Y. C., 2009, 2009 IEEE International Symposium on Power Line Communications and its Applications, ISPLC 2009. p. 325-330 6 p. 4913451. (2009 IEEE International Symposium on Power Line Communications and its Applications, ISPLC 2009).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    1 Citation (Scopus)

  • Two-hop MIMO relaying systems using random unitary beamforming in Gaussian broadcast channels

    Kim, D. H., Lee, J. H. & Ko, Y. C., 2009, Proceedings - 2009 1st International Conference on Advances in Satellite and Space Communications, SPACOMM 2009. p. 69-73 5 p. 5194588. (Proceedings - 2009 1st International Conference on Advances in Satellite and Space Communications, SPACOMM 2009).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    1 Citation (Scopus)

  • Two-way amplify and forward relaying with adaptive modulation

    Hwang, K. S., Ko, Y. C. & Alouini, M. S., 2009, Proceedings of the 2009 ACM International Wireless Communications and Mobile Computing Conference, IWCMC 2009. Association for Computing Machinery (ACM), p. 1370-1374 5 p. (Proceedings of the 2009 ACM International Wireless Communications and Mobile Computing, Connecting the World Wirelessly, IWCMC 2009).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    2 Citations (Scopus)

  • Variable threshold M-QAM with feedback delay over Nakagami-m fading channels

    Lee, S. D. & Ko, Y. C., 2009, Proceedings of the 2009 IEEE 70th Vehicular Technology Conference Fall, VTC 2009 Fall. 5378871. (IEEE Vehicular Technology Conference).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • 2008

    Adaptive antenna scaling for multi-user MIMO downlink zero-forcing transmissions with finite rate feedback

    Park, K. H., Ko, Y. C., Yang, H. C. & Kim, J. S., 2008, WCNC 2008 - IEEE Wireless Communications and Networking Conference, Conference Proceedings. Institute of Electrical and Electronics Engineers Inc., p. 661-665 5 p. 4489153. (IEEE Wireless Communications and Networking Conference, WCNC).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Exact performance analysis of joint adaptive modulation and power loading transmission in multi-channel system

    Lee, S. D. & Ko, Y. C., 2008, WCNC 2008 - IEEE Wireless Communications and Networking Conference, Conference Proceedings. Institute of Electrical and Electronics Engineers Inc., p. 1097-1102 6 p. 4489229. (IEEE Wireless Communications and Networking Conference, WCNC).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    2 Citations (Scopus)

  • Exact sum-rate analysis of MIMO broadcast channels with random unitary beamforming based on quantized sinr feedback

    Yang, H. C., Lu, P., Sung, H. K. & Ko, Y. C., 2008, ICC 2008 - IEEE International Conference on Communications, Proceedings. p. 3669-3673 5 p. 4533726. (IEEE International Conference on Communications).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    9 Citations (Scopus)

  • Joint selection combining and power loading transmission with adaptive M-QAM in multi-channel system

    Lee, S. D. & Ko, Y. C., 2008, 2nd International Conference on Signal Processing and Communication Systems, ICSPCS 2008 - Proceedings. 4813655. (2nd International Conference on Signal Processing and Communication Systems, ICSPCS 2008 - Proceedings).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Outage probability of cooperative diversity systems with opportunistic relaying based on decode-and-forward transmission

    Hwang, K. S., Ko, Y. C. & Alouini, M. S., 2008, 2008 IEEE 67th Vehicular Technology Conference-Spring, VTC. p. 1102-1107 6 p. 4525790. (IEEE Vehicular Technology Conference).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Performance analysis of incremental relaying transmission with adaptive QAM over Nakagami-m fading channels

    Hwang, K. S., Ko, Y. C. & Alouini, M. S., 2008, IWCMC 2008 - International Wireless Communications and Mobile Computing Conference. p. 458-463 6 p. 4599979. (IWCMC 2008 - International Wireless Communications and Mobile Computing Conference).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    6 Citations (Scopus)

  • Performance analysis of incremental relaying with relay selection and adaptive modulation over non-identically distributed cooperative paths

    Hwang, K. S., Ko, Y. C. & Alouini, M. S., 2008, Proceedings - 2008 IEEE International Symposium on Information Theory, ISIT 2008. p. 2678-2682 5 p. 4595478. (IEEE International Symposium on Information Theory - Proceedings).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    13 Citations (Scopus)

  • Performance analysis of opportunistic incremental relaying with adaptive modulation over cooperative networks

    Hwang, K. S., Ko, Y. C. & Alouini, M. S., 2008, 3rd International Symposium on Wireless Pervasive Computing, ISWPC 2008, Proceedings. p. 586-590 5 p. 4556276. (3rd International Symposium on Wireless Pervasive Computing, ISWPC 2008, Proceedings).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    14 Citations (Scopus)

  • Performance enhancement of random unitary beamforming based multiuser MIMO systems with optimum combining

    Lu, P., Yang, H. C. & Ko, Y. C., 2008, 2008 IEEE Global Telecommunications Conference, GLOBECOM 2008. p. 4447-4451 5 p. 4698628. (GLOBECOM - IEEE Global Telecommunications Conference).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

  • Performance improvement of transmit beamforming MISO system using optimum codebook indexing over feedback error channel

    Lee, J. & Ko, Y. C., 2008, Proceedings - 2008 IEEE International Symposium on Information Theory, ISIT 2008. p. 2558-2562 5 p. 4595453. (IEEE International Symposium on Information Theory - Proceedings).

    Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

    5 Citations (Scopus)