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  • signals
  • The second-generation instruments (the R&S FSE family) made it possible for the first time to perform modulation analysis of digitally-modulated signals. (microwavejournal.com)
  • One dimensional signals are expressed in terms of a single domain while multidimensional signals are represented in wave vector and frequency spectrum. (wikipedia.org)
  • In the recent past, a number of methods have been suggested to design models with finite parameters to estimate the power spectrum of multidimensional signals. (wikipedia.org)
  • In this article, we will be looking into the basics of methods used to estimate the power spectrum of multidimensional signals. (wikipedia.org)
  • It is also used in compression and coding of audio and video signals, beam forming and direction finding in radars, Seismic data estimation and processing, array of sensors and antennas and vibrational analysis. (wikipedia.org)
  • When it comes to multidimensional signals, there are two main approaches: use a bank of filters or estimate the parameters of the random process in order to estimate the power spectrum. (wikipedia.org)
  • power
  • Power spectrum analysis of heart rate variability in human cardiac transplant recipients. (ahajournals.org)
  • Heart rate power spectra were calculated from eighty-four 256-second recordings and compared with those taken from six normal subjects. (ahajournals.org)
  • When the power spectra of those patients whose endomyocardial biopsies showed evidence of myocardial rejection were compared with those from patients who were found to be free of rejection, a significant difference was found in log total power (-0.602 +/- 0.090 [0.vs. -0.909 +/- 0.136 [0. p less than 0.02). (ahajournals.org)
  • Power spectrum analysis of heart rate fluctuations provides a quantitative noninvasive means of assessing the functioning of the short-term cardiovascular control systems. (sciencemag.org)
  • It is a technique to estimate the power spectrum of a single dimensional or a multidimensional signal as it cannot be calculated accurately. (wikipedia.org)
  • His doctoral dissertation established mathematical models for the signal-to-noise properties (specifically, the modulation transfer function, noise-power spectrum, and detective quantum efficiency) of flat-panel x-ray detectors. (wikipedia.org)
  • In time series analysis, Bartlett's method (also known as the method of averaged periodograms), is used for estimating power spectra. (wikipedia.org)
  • analyzers
  • The company now offers 33 different spectrum analyzers, ranging from portable, battery-operated instruments for the field, to comprehensive microwave signal analyzers for characterizing the performance of wireless systems. (microwavejournal.com)
  • There are various types of spectrum analyzers ranging from large and expensive bench-top units to portable ("field units") and PC-based analyzers. (wikipedia.org)
  • Because portability is a decisive factor in conducting wireless site surveys, PC-based spectrum analyzers in CardBus and USB form factors are widely used today. (wikipedia.org)
  • approaches
  • Most existing spectrum-based approaches rely on similarity measures to locate faulty software units by identifying the units that most resemble the spectra error outcomes [ 9 - 15 ]. (hindawi.com)
  • main
  • When Wi-Spy is plugged in, a live spectrum picture is displayed on the Channels and Spectrum pane of the main CommView for WiFi window, as shown below. (tamos.com)
  • The spectrum pane can be detached from the main application window and displayed as a separate floating window. (tamos.com)
  • Channels and Spectrum item in the main application menu. (tamos.com)
  • Definition
  • Since the definition of the spectrum does not mention any properties of B(X) except those that any such algebra has, the notion of a spectrum may be generalised to this context by using the same definition verbatim. (wikipedia.org)
  • measurement
  • MS2034A/MS2036A light weight (4 kg), three-plus hour battery life, and advanced measurement and analysis capability make it well suited for a variety of field applications. (anritsu.com)
  • signal
  • He developed early models for the signal and noise performance of flat-panel detectors and later extended such analysis to dual-energy imaging and 3D imaging performance in cone-beam CT. (wikipedia.org)