Browsing by Author "Lee, Y."

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Adaptive channel aided decision feedback equalisation for SISO and MIMO systems
(2006-10-01)
Lee, Y.
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Wu, W. -R.
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電信工程研究所
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Institute of Communications Engineering
Error propagation can seriously affect the performance of an adaptive decision feedback equaliser (DFE), especially when operated in time-varying channel environments. Error propagation not only affects DFE decisions, but also disturbs the DFE adaptation. The paper focuses on improving the robustness against error propagation for the least-mean-square (LMS) based minimum mean-squared-error DFE (MMSE-DFE). A specifically designed channel estimator is introduced to help the DFE adaptation in the decision-directed (DD) mode. Unlike the conventional DFE, the proposed adaptive channel-aided DFE (ACA-DFE) only adapts the feedforward filter with the LMS algorithm. The feedback filter, however, is obtained from the postcursors of the estimated channel convolved with the feedforward filter. As a result, the proposed ACA-DFE can reduce the error propagation effect and perform better than the conventional adaptive DFE. We also demonstrate that the ACA-DFE can be extended to multiple-input multiple-out (MIMO) systems improving the performance of the conventional MIMO DFE.
Low frequency noise characterization of CoFeB/MgO/CoFeB MTJ based perpendicular field sensor.
(2015)
Lee, Y.
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Das, B.
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Li, L.
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Suen, Y.
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Horng, L.
Who is the target population for shortening prehospital delay?
(2014-10-01)
Lee, Y.
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Yip, B.
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Wang, H.
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統計學研究所
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Institute of Statistics