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Bandwidth extension of a constrained loudspeaker system is regularly achieved employing nonlinear bass synthesis. The method operates on the doctrine of the missing fundamental whereby humans infer the presence of a fundamental tone when presented with a signal consisting of higher harmonics of said tone. Nonlinear devices and phase vocoders are commonly used for signal generation; both exhibiting...
This paper advances a novel method for power quality detection by using fast lifting wavelet transform and utilizing the reconstructed signal to compensate for the harmonics. After the disturbed signal is decomposed to many sub-bands in frequency domain, the disturbing time and level can be identified and the disturbed signal can be compensated by the reconstructed signal. In this paper, the theory...
Models for power system components are important nor only for calculating power quality indexes but also for understanding the propagation characteristics of the disturbances. There are several types of power quality disturbances. The disturbances are typically classified according to their duration and frequency content. The voltage sags, for example, cause reduction on RMS, values for a few cycles...
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