Journal ArticleDOI
Survey of excitation signals for FFT based signal analyzers
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The properties of ten different excitation signals are studied to analyze their suitability as excitation signal for fast Fourier transform (FFT)-based signal and network analyzers and the flexibility to create a customized amplitude spectrum is investigated.Abstract:
The properties of ten different excitation signals are studied to analyze their suitability as excitation signals for fast Fourier transform (FFT)-based signal and network analyzers. Their influence on the measurement time, accuracy, and sensitivity to nonlinear distortions is described. The flexibility to create a customized amplitude spectrum is investigated. With this information it becomes possible to select the best excitation signal for many applications. >read more
Citations
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Proceedings ArticleDOI
Statistics of input signals for frequency domain identification of weakly nonlinear systems in communications
TL;DR: The main idea of the paper is to design the test signal so that it reproduces the statistical behaviour of typical input signals, and to retain the advantages of periodic test signals for FFT processing.
Proceedings ArticleDOI
Measuring Bode plots of switching power converters from a single simulation in the time domain: Application to a digital control implemented on an FPGA
TL;DR: In this article, the measurement of a Bode plot of a switching power converter from a single simulation in the time domain by means of a multisine signal is presented, which allows an important saving in simulation time compared to a single-tone injection approach.
Proceedings ArticleDOI
Probing signal design for seismic landmine detection
TL;DR: In this article, the design of time-domain signals for use as seismic excitations in a system that images buried landmines is addressed. But the design is constrained by the requirement that nonlinear effects be tolerable rather than imperceptible (i.e. that the nonlinearity be sufficiently weak that the system can be reasonably characterized as linear).
Journal ArticleDOI
Frequency response function measurement and parametric SISO system modelling of a gyro-stabilized infrared electro optic gimbal system
TL;DR: In this article, a single axis (inner azimuth gimbal) of a four-axis gyro-stabilized electro-optic (EO)-gimbal system is modelled through experimental investigation in the frequency domain, and the results of this investigation are presented.
Journal ArticleDOI
Sparse Green’s Functions Estimation Using Orthogonal Matching Pursuit: Application to Aeroacoustic Beamforming
TL;DR: A new methodology for the numerical estimation of the Green’s functions in complex external aeroacoustic configurations is presented.
References
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On the use of windows for harmonic analysis with the discrete Fourier transform
TL;DR: A comprehensive catalog of data windows along with their significant performance parameters from which the different windows can be compared is included, and an example demonstrates the use and value of windows to resolve closely spaced harmonic signals characterized by large differences in amplitude.
The fast Fourier Transform
TL;DR: A computer algorithm that computes the discrete Fourier transform much faster than other algorithms, is explained and examples and detailed procedures are provided to assist the reader in learning how to use the algorithm.
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Synthesis of low-peak-factor signals and binary sequences with low autocorrelation (Corresp.)
TL;DR: In this correspondence, a formula for the phase angles is derived that yields generally low peak factors, often comparable to that of a sinusoidal signal of equal power.
Journal ArticleDOI
Peak factor minimization using a time-frequency domain swapping algorithm
TL;DR: In this paper, an algorithm is presented to minimize the peaks in the time domain of bandlimited Fourier signals, which has the ability to compress signals effectively without disturbing their spectral magnitudes.