Edward W. Jang

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—The implementation of Decision Feedback Equalization-based receivers for MIMO systems that employ Hybrid ARQ (HARQ) is considered. It is shown how the theory of MIMO Decision Feedback Equalization can be applied to derive optimal DFE architectures for the case of MIMO HARQ. Incremental structures are proposed that reduce the implementation complexity of(More)
—This paper proposes a new combining scheme for multiple-input multiple-output (MIMO) systems with hybrid automatic-repeat-request (HARQ). The proposed combining scheme is proved to have the optimal decoding performance. Furthermore, the proposed combining scheme is shown to have low memory requirement and reduced complexity compared to other optimal(More)
— In this paper, we consider single user throughput optimization problem for continuous flat fading channels of multiple-input multiple-output (MIMO) system. It is known that channel state information (CSI) at the transmitter enables significantly higher data rate for MIMO system compared to single-input single-output (SISO) system case. One of the widely(More)
— This paper proposes to use flexible adaptive-modulation-and-coding (AMC) tables in a wireless network. To support the flexibility of AMC tables, a low-complexity AMC table optimization algorithm is also proposed. The proposed algorithm iteratively optimizes the switching levels of an AMC table according to channel environments, and has fast convergence(More)
— This paper proposes the opportunistic power allocation (OPA) scheme for random beamforming with a limited feedback rate. Without the channel state information, the proposed scheme allocates different amounts of power to different beams. Various low-complexity search algorithms for the proposed OPA scheme are also proposed to find the optimal power(More)
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