Research Interests
　

[1] Wireless Systems : IEEE802.16e (voting member), IEEE802.11n and 3GPP/3GPP2 LTE

[2] PHY

    [2-1] Multiple Access : OFDM/A, CDMA, TDMA, FDMA, SDMA

    [2-2] Space Time Coding : Orthogonal/orthonormal STBC, STTC, FDFR STC.

    [2-3] Spatial Multiplexing : Advanced Decoding Structures (A-ML, sphere, SIC w/ modified LLR)

    [2-4] Hybrid : Grouping

    [2-5] Beamforming : Coherent/Noncoherent BF, Coordinated BF

    [2-6] Precoding : w/ Limited Feedback

    [2-7] Adaptive MIMO

    [2-8] PAPR Reduction (especially for analog channel)

    [2-9] Opportunistic Feedback (for MU-MIMO, Clustered OFDM Systems)

     ...

[3] MAC

    [3-1] Resource Allocation : Congestion control, Handover (inter-systems), Traffic control

    [3-2] Schedulers

    [3-3] Flow-level Analysis

[4] Capacity

    [4-1] Multiple Access/Broadcast Channel

    [4-2] Relay Channel

    [4-3] BC w/ Partial CSI

    [4-4] Interference Channel

    [4-5] Cognitive Radios

[5] Mathematics

    [5-1] Matrix Analysis

    [5-2] Abstract Algebra

    [5-3] Analytical Approach  asymptotic extraction techniques)

    [5-4] Grassmann Subspace Packing (structured tight frames)

    [5-5] Graph Theory (ex. balanced partitioning)

    [5-6] Convex Optimization (nonlinear programming)

    [5-7] Game Theory (Nash equilibrium, Pareto Optimal)

    [5-8] Numerical Analysis (ex. finite element method (FEM), method of moment (MoM), finite difference time domain (FDTD))

[6] Physics

    [6-1] Optoelectronics (LED, Laser Diode)

    [6-2] Solid State Physics (IV, III-V)

    [6-3] Quantum Electronics

    [6-4] Applied Electromagnetics (active/passive antenna, monoblock duplexer)

[7] Human Networks

    [7-1] Love

    [7-2] Marriage

    [7-3] Union