Browsing by Author "Chiu, Rong-Dong"

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A BAN System for Realtime ECG Monitoring: from Wired to Wireless Measurements
(2011)
Chiu, Rong-Dong
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Wu, Sau-Hsuan
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電信工程研究所
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Institute of Communications Engineering
A body area network is developed for a 3-Lead wireless electrocardiography (ECG) monitoring system. To measure the 3-Lead ECG signals without using wires for electrodes to connect to a common ground, we study a new ECG sensing method that directly and synchronously measures the voltage differences across the nearby electrodes of distributed ECG leads. To verify the effectiveness of the proposed method, the qualities of the ECG signals acquired from various placements and distances between the electrodes are compared with the ones obtained with the standard wired ECG measurement method. The highest correlation coefficient between the wired and wireless ones is shown by experiments to be as high as 0.946. And the separation between the two electrodes of an ECG lead can be drastically reduced to around 10cm which is about the size of a medium adhesive tape. This shows that a 3-Lead wireless ECG monitoring system is in fact feasible. More advanced approaches may be developed based on the results obtained herein to further construct a 12-Lead wireless ECG system.
Low-Complexity Soft-Output Sphere Decoding with Modified Repeated Tree Search Strategy
(2013-01-01)
Shieh, Shin-Lin
;
Chiu, Rong-Dong
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Feng, Shih-Lun
;
Chen, Po-Ning
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交大名義發表
Many solutions for detecting signals transmitted over flat-faded multiple input multiple output (MIMO) channels have been proposed, e.g., the zero-forcing (ZF), minimum mean squared error (MMSE), sphere decoding (SD) algorithms, to name a few. These approaches however suffer from either unsatisfactory performance or high complexity. In this paper, we focus on the soft-output SD algorithm and propose a modification on the repeated tree search (RTS) strategy. It is shown that our modification can maintain a fixed upper limit in decoding complexity and results in a good performance-complexity tradeoff.