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Liu, W., K. Choi, and H. Liu, "Computationally Efficient Lattice Reduction Aided Detection for MIMO-OFDM Systems under Correlated Fading Channels", ETRI Journal, vol. 34, issue 4, pp. 503 - 510, 08/2012.
Choi, K., and H. Liu, "Polyphase Scrambled Walsh Codes for Zero-Correlation Zone Extension in QS-CDMA", IEEE Communications Letters, vol. 16, issue 4, pp. 429 - 431, 04/2012.
Choi, K., and H. Liu, "Power Allocation for Distributed Transmit Diversity with Feedback Loop Delay", IEEE Transactions on Communications, vol. 59, issue 1, pp. 52 - 58, 01/2011.
Liu, W., K. Choi, and H. Liu, "Complexity-Reduced Channel Matrix Inversion for MIMO Systems in Time-Varying Channels", 2010 IEEE 71st Vehicular Technology Conference, Taipei, Taiwan, IEEE, pp. 1 - 5, 05/2010.
Liu, W., K. Choi, and H. Liu, "Computationally efficient lattice reduction for MIMO-OFDM systems", 2010 IEEE 6th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob), Niagara Falls, NU, Canada, IEEE, pp. 264 - 267, 10/2010.
Choi, K., and H. Liu, "Quasi-Synchronous CDMA Using Properly Scrambled Walsh Codes as User-Spreading Sequences", IEEE Transactions on Vehicular Technology, vol. 59, issue 7, pp. 3609 - 3617, 09/2010.
Lim, D., K. Choi, and H. Liu, "Optimum Power Allocation for Distributed Antenna Systems with Large-scale Fading-only Feedback", 2009 Sixth International Conference on Information Technology: New Generations, Las Vegas, NV, IEEE, pp. 1158 - 1164, 04/2009.