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How to reduce the computation time and how to improve the quality of the clustering result are the two major research issues. Although several efficient and effective clustering algorithms have been presented, none of which is perfect. As such, an effective clustering algorithm, which is based on the prediction of searching information to determine the search directions at later iterations and employs...
Early power modeling and analysis using electronic system-level methodology enables designers to explore energy saving opportunities more efficiently at a higher abstraction level. However, power modeling for third party IPs are challenging due to the limited observability and unknown architecture details. To model the data dependency for blackbox IPs, several works rely on adopting Hamming distance...
This paper proposes a novel rotor position estimation algorithm for the vector control of the doubly-fed induction generators (DFIGs) in wind power applications. The proposed algorithm uses a sliding mode observer (SMO) to estimate the rotor position information from the stator currents. The estimated rotor position is then used for the position sensorless vector control of the DFIG. The proposed...
This paper proposes a novel rotor position estimation algorithm used for reference frame transformation in the direct power control (DPC) of a doubly-fed induction generator (DFIG) in wind power applications. The proposed algorithm can be used as a primary rotor position information provider to replace the rotor position sensor or a backup rotor position information provider during the malfunction...
Orthogonal frequency-division multiplexing (OFDM) is a popular transmission technology in cognitive radio (CR) networks, because the correlation of cyclic prefix (CP) in OFDM signals can be utilized to improve the reliability of spectrum sensing of secondary users (SUs). However, the optimal spectrum sensing over multipath fading channels remains an important and challenging issue. Therefore, this...
In this paper, we propose a low speed built-in-self-test (BIST) scheme for testing static parameters of high-speed digital-to-analog converter (DAC). Based on under-sampling technique, the DAC output signal is modulated into low speed pulse signal by pulse-width-modulation (PWM) with two sinusoidal carriers. The nonlinearity errors of DAC hence represents on duty ratio of converted pulse signal. In...
In this work, we propose a novel test scheme for high speed digital-to-analog converter (DAC) based on under -sampling technique. The under-sampling technique is constructed by a pulse-width-modulation (PWM) modulator. The DAC output signal is modulated through a low frequency sinusoidal carrier and converted to low speed pulse signal. The pulse width of low speed pulse signal can be measured using...
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