Aalborg Universitet
... filter plays an important role. Even though this topic has already been widely studied, there are many optimizations and problems to be solved, like how to design a filter for grid-connected converters in distributed generation system in order to get a lower loss and higher efficiency? How to solve ...
... filter plays an important role. Even though this topic has already been widely studied, there are many optimizations and problems to be solved, like how to design a filter for grid-connected converters in distributed generation system in order to get a lower loss and higher efficiency? How to solve ...
NVIS - Raynet HF
... NVIS – For the Radio Amateur In practice, 7 Mhz (40m) usually ‘highest’ band 3.5 MHz (80m) next lowest 1.81 MHz (160m, ‘Topband’) the lowest 80m and 160m strongly affected during the day by absorption from the D-layer, plus noise at night and varying times of the year Hence the need for a ‘mid ...
... NVIS – For the Radio Amateur In practice, 7 Mhz (40m) usually ‘highest’ band 3.5 MHz (80m) next lowest 1.81 MHz (160m, ‘Topband’) the lowest 80m and 160m strongly affected during the day by absorption from the D-layer, plus noise at night and varying times of the year Hence the need for a ‘mid ...
Modular Oscilloscopes vs. Digitizers Technical Article
... include add, subtract, multiply, FFT, derivative, integral, histogram, limit testing, mask testing, waveform parameter trending and calculation of 40+ parameters related to waveform behavior. On-board waveform math and analysis in modular oscilloscopes removes the need to transfer large amount of wa ...
... include add, subtract, multiply, FFT, derivative, integral, histogram, limit testing, mask testing, waveform parameter trending and calculation of 40+ parameters related to waveform behavior. On-board waveform math and analysis in modular oscilloscopes removes the need to transfer large amount of wa ...
[Downstream Baseline Proposal Text – to be included in P802.3bn...
... All active subcarriers with the exception of pilots are transmitted with the same average power. Pilots are transmitted boosted by a factor of 2 in amplitude (approximately 6 dB). ...
... All active subcarriers with the exception of pilots are transmitted with the same average power. Pilots are transmitted boosted by a factor of 2 in amplitude (approximately 6 dB). ...
Harmonic Analysis of A DFIG for Wind Energy Conversion System
... rotor circuit injection. Section IV presents the harmonic analysis of a DFIG under unbalanced stator condition. Three case studies, namely, (i) non-sinusoidal rotor injection, (ii) an isolated unbalanced load and (iii) grid-connected operation. are given in Section V. The analysis along with experim ...
... rotor circuit injection. Section IV presents the harmonic analysis of a DFIG under unbalanced stator condition. Three case studies, namely, (i) non-sinusoidal rotor injection, (ii) an isolated unbalanced load and (iii) grid-connected operation. are given in Section V. The analysis along with experim ...
Measuring Parasitic Capacitance and Inductance Using TDR
... Why would anyone use TDR to measure an inductance or capacitance when there are many inductance-capacitanceresistance (LCR) meters available that have excellent resolution and are easy to use? First of all, TDR allows measurements to be made on devices or structures as they reside in the circuit. Wh ...
... Why would anyone use TDR to measure an inductance or capacitance when there are many inductance-capacitanceresistance (LCR) meters available that have excellent resolution and are easy to use? First of all, TDR allows measurements to be made on devices or structures as they reside in the circuit. Wh ...
Chirp spectrum
The spectrum of a chirp pulse describes its characteristics in terms of its frequency components. This frequency-domain representation is an alternative to the more familiar time-domain waveform, and the two versions are mathematically related by the Fourier transform. The spectrum is of particular interest when pulses are subject to signal processing. For example, when a chirp pulse is compressed by its matched filter, the resulting waveform contains not only a main narrow pulse but, also, a variety of unwanted artifacts many of which are directly attributable to features in the chirp's spectral characteristics. The simplest way to derive the spectrum of a chirp, now computers are widely available, is to sample the time-domain waveform at a frequency well above the Nyquist limit and call up an FFT algorithm to obtain the desired result. As this approach was not an option for the early designers, they resorted to analytic analysis, where possible, or to graphical or approximation methods, otherwise. These early methods still remain helpful, however, as they give additional insight into the behavior and properties of chirps.