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The power line interference (PLI) reduction for ECG signals is a challenging task for its time-varying amplitude and time-varying frequency within the spectrum range of ECG signals. Most existing Least Squared-based methods such as Extended Kalman filter to estimate PLI from noisy ECG are vulnerable to the QRS pulses, especially for lower noisy-to-signal ratio ECG. This study proposes a robust tracking...
Characteristic points (CPs) detection is still an open problem for the automatic analysis of electrocardiogram (ECG). Past Kalman Filter-Based efforts to extract CPs rely on a locally linearized approximation of the nonlinear ECG dynamical model and fail to detect all CPs accurately for strong noisy ECG. In this study, an improved particle filters-based algorithm is developed to track the dynamical...
In passive bistatic radar system, both detection and joint estimation of time delay and Doppler shift of target are based on the cross-ambiguity function (CAF) between direct-path signals and target echoes. However, the drawback of this approach is the excessive processing load which is caused by the fast Fourier transforms (FFT) for long input samples. Since the interested frequencies of target often...
The communications are interrupted by the hidden terminals in the traditional MAC protocols when the nodes?? power is asymmetric in WSN networks. On the basis of S-MAC the improved protocol is proposed. Node judges whether the power asymmetric nodes are occurred in the vicinity of it according to the link state with neighborhood nodes. Then neighborhood nodes broadcast bandwidth reservation (BRES)...
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