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Voltage and current waveforms produced by several power systems are often characterized by a wide spectrum that contains numerous components, namely the fundamental, harmonics, and interharmonics. They can be properly analyzed through discrete Fourier transform (DFT)-based methods only if they remain stationary in time; in fact, in the presence of nonstationary components, DFT-based approaches do...
In this paper we performed assessment of both wavelet and SVD based techniques and proposed a hybrid method by combining wavelet and SVD for the filtering of noise in harmonics. In the first step of the algorithm, wavelet denoising is applied to the noisy signal as pre-processing (gross filtering) step. Singular value decomposition is then applied to a data matrix formed from the denoised signal....
A high intercept points, cost-effective, and power-efficient switching FET double balanced mixer (DBM) is reported. The Switching FET DBM demonstrated in this work offers input intercept points (IIP3) and conversion loss typically 44 dBm and 8.5 dB respectively with 15 dBm LO power for the frequency band (RF: 900-2150 MHz, LO: 850-1950 MHz, IF: 50-200 MHz). The measured interport isolation is typically...
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