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Signal processing sample technique
In signal processing, undersampling or bandpass sampling is a technique where one samples a bandpass-filtered signal at a sample rate below its Nyquist
Undersampling
Statistical sampling techniques
frequently than undersampling, especially when the detailed data has yet to be collected by survey, interview or otherwise. Undersampling is employed much
Oversampling and undersampling in data analysis
Oversampling_and_undersampling_in_data_analysis
Statistical oversampling method
equivalently represented in the data with the minority class. Instead of undersampling the majority class, SMOTE oversamples the minority class. However, this
Synthetic minority oversampling technique
Synthetic_minority_oversampling_technique
Maximum frequency of non-aliased component upon sampling
produce the same set of samples as the actual sinusoid that was sampled. Undersampling of the sinusoid at 0.6 fs is what allows there to be a lower-frequency
Nyquist_frequency
Signal processing effect
f_{s}/2} , where f s {\textstyle f_{s}} is the sampling frequency (undersampling). This is because typical reconstruction methods use low frequency components
Aliasing
Measurement of a signal at discrete time intervals
bandpass signal is still uniquely represented and recoverable. Such undersampling is also known as bandpass sampling, harmonic sampling, IF sampling,
Sampling_(signal_processing)
Sufficiency theorem for reconstructing signals from samples
which H ( f ) {\displaystyle H(f)} is free to take intermediate values. Undersampling, which causes aliasing, is not in general a reversible operation. Theoretically
Nyquist–Shannon sampling theorem
Nyquist–Shannon_sampling_theorem
Interference pattern
checkered plane (the latter being a special case of aliasing, due to undersampling a fine regular pattern). This can be overcome in texture mapping through
Moiré_pattern
Process of varying one or more properties of a periodic waveform
(sometimes before or instead of the above point, for example by means of undersampling). Equalization filtering, for example, a matched filter, compensation
Signal_modulation
Astrophotography image processing method
forced to choose between properly sampling a small field of view and undersampling a larger field. This is a particular problem for the Hubble Space Telescope
Drizzle_(image_processing)
Resampling method
an anti-aliasing filter, and its design is discussed below. Also see undersampling for information about decimating bandpass functions and signals. When
Downsampling (signal processing)
Downsampling_(signal_processing)
Wave which propagates through a magnetic material
method, known as Super-Nyquist sampling MOKE (SNS-MOKE), relies on undersampling of the coherent spin wave with the laser pulses. Ferromagnetic (or antiferromagnetic)
Spin_wave
Implementation of an ambient occlusion illumination in computer graphics
occluding geometry that is not rasterized into the z-buffer and may produce undersampling-related artifacts. Screen space directional occlusion (SSDO) "What is
Screen space ambient occlusion
Screen_space_ambient_occlusion
System that converts an analog signal into a digital signal
simultaneous down-mixing of a band-limited high-frequency signal (see undersampling and frequency mixer). The alias is effectively the lower heterodyne
Analog-to-digital_converter
Data analysis technique
mathematical programming equations and analytical solutions. Oversampling and undersampling in data analysis Surrogate data Generative adversarial network Variational
Data_augmentation
0/1 USB Yes Yes Yes Elektor AVR SDR Kit and pre-built up to 1 MHz in undersampling ? up to 15 kS/s 0/1 UART via RS2-232 converter or USB bridge Yes Yes
List of software-defined radios
List_of_software-defined_radios
Information rate that can be transmitted over a given bandwidth
bandwidth W can be converted to an equivalent baseband signal (using undersampling or a superheterodyne receiver), with upper cut-off frequency W/2. If
Spectral_efficiency
Phenomenon in statistics
sampling scenarios and data-generating models, even in cases of severe undersampling. ... method is fully analytic and hence computationally inexpensive
Shrinkage_(statistics)
Species of Snake
records from some montane protected areas likely being a result of undersampling rather than its true absence. The species was recorded from Nicaragua
Cerrophidion_wilsoni
Sampling higher than the Nyquist rate
DAC. Oversampled binary image sensor Sample abundance Supersampling Undersampling While with N=256 there is an increase in dynamic range by 8 bits, and
Oversampling
Tool for digital signal processing
re-sampled at a reduced rate. The same result can sometimes be achieved by undersampling the bandpass subbands. Another application of filter banks is lossy
Filter_bank
Instrument for displaying time-varying signals
ResearchGate. Green, Leslie (June 21, 2001), "The alias theorems: practical undersampling for expert engineers", EDN, archived from the original on 20 June 2013
Oscilloscope
Medical intervention
smears are very sensitive and some negative biopsy results may represent undersampling of the lesion in the biopsy, so negative biopsy with positive cytology
Pap_test
Signals broadcast by GPS satellites
order. Note that aliasing is sometimes intentional (specifically, when undersampling is used) but filtering is still required to discard frequencies not
GPS_signals
Statistics and machine learning technique
Sundarkumar, G. Ganesh; Ravi, Vadlamani (January 2015). "A novel hybrid undersampling method for mining unbalanced datasets in banking and insurance". Engineering
Ensemble_learning
difficult to study because of an inability to recover live samples, undersampling of the hadal zone, and low population density. Microbial metabolism
Hadal zone microbial communities
Hadal_zone_microbial_communities
Overview of and topical guide to electrical engineering
Nyquist–Shannon sampling theorem Oversampling Sample and hold Sampling frequency Undersampling Upsampling Audio signal processing Audio noise reduction Speech processing
Outline of electrical engineering
Outline_of_electrical_engineering
List of definitions of terms and concepts used in electrical engineering and electronics
hearing. A portmanteau of the former description of 'ultrasonic sound' undersampling Sampling a signal at less than the Nyquist rate; can produce alias frequencies
Glossary of electrical and electronics engineering
Glossary_of_electrical_and_electronics_engineering
Type of visual artifact
image (Figs 6 and 7). It can be caused by non-linear gradients or by undersampling of the frequencies contained within the return signal. The sampling
MRI_artifact
Type of MRI
and continuous data acquisition, motion robustness, and tolerance to undersampling, with an iterative image reconstruction method based on the formulation
Real-time_MRI
Species of frogs
especially the Karpas Peninsula, but this lack of records is likely due to undersampling in the region. Subpopulations of the species are frequently found in
Pelophylax_cypriensis
Star in the constellation Norma
made a determination of the orbital eccentricity more difficult due to undersampling over part of the orbit, in combination with jitter. The authors chose
HD_142415
Species of spider
listed as Data Deficient due to its limited known distribution and undersampling. It is known from only two sites and more sampling is needed to determine
Ballomma_neethlingi
cases may be less lethal than feared, but more prevalent due to various undersampling errors.)[better source needed] "Cambodian study hints at subclinical
Human_mortality_from_H5N1
Gene that has limited phylogenetic distribution
genes. In some cases, a gene can be classified as an orphan gene due to undersampling of the existing genome space. While it is possible that homologues exist
Orphan_gene
Genus of ornithocheiroid pterosaur from the Late Cretaceous
fossil record caused a distorted image of the true situation through undersampling. To test this hypothesis, an effort was made to collect all pterosaurs
Tethydraco
Radar on the Mars Reconnaissance Orbiter
and digital gain control directly at RF, and the digitised using an undersampling technique at a rate of 26.6 MHz. A single digital signal processor provides
SHARAD
Analytical chemistry technique
mass spectrometers also restricts the collision rate, resulting in an undersampling. Sample preparation protocols represent sources of experimental bias
Quantitative_proteomics
Genus of jellyfishes
misidentifications. The range of the species could also be an underestimation due to undersampling and a lack of scientific study of the species. Chiropsoides buitendijki
Chiropsoides
Data structures used to track continuously moving geometric bodies
structure. However, such an approach is vulnerable to oversampling or undersampling, depending on what interval of time is used, and can also be wasteful
Kinetic_data_structure
expense of random sampling. This problem may be exacerbated by the undersampling inherent in shotgun proteomics. Cells containing the protein complement
Shotgun_proteomics
Species of fish
only a few kilometres from the Colombian border. This could represent undersampling in what is a remote part of the forest. This is a very small fish: even
Nannostomus_anduzei
Types of capacitor Ubiquitous computing Ultrasonic motor Ultrasonics Undersampling Underwriters Laboratories Unijunction transistor University College
Index of electrical engineering articles
Index_of_electrical_engineering_articles
Study of what affects viral life spans
epidemiological and evolutionary simulations appear robust to a large degree of undersampling or oversampling of a particular region. Further methodological progress
Viral_phylodynamics
Sound frequency changes responsible for perceptions of loudness, pitch and timbre
stochastic undersampling degrade the representation of the TFSn more than the representation of the ENVn. Both jittering and stochastic undersampling impair
Temporal envelope and fine structure
Temporal_envelope_and_fine_structure
spatial frequency components are sampled by noiselet encoding, the undersampling allows the reconstruction of the image with fewer measurements, in other
Noiselet
UNDERSAMPLING
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Boy/Male
Indian, Kannada, Marathi, Tamil
Ajay; God Shiva
Girl/Female
Muslim
Nice, Beautiful, Radiant
Surname or Lastname
English
English : topographic name from Old English brÄd ‘broad’ + weg ‘way’, ‘track’, or a habitational name from a place so named, notably Bradway in South Yorkshire. See also Broadway.
Boy/Male
Afghan, Arabic, Indian, Kannada, Muslim, Pashtun, Punjabi, Sikh, Sindhi, Tamil, Telugu
Prosperity; Wealth; Glory Destiny; Desire; Fortunate; Richness
Female
Spanish
Spanish form of Latin Clarissa, CLARISA means "fame."
Girl/Female
Australian, British, English
Charming
Girl/Female
Arabic, Muslim, Sindhi
Lights; Lamps
Boy/Male
Scottish
Waning.
Boy/Male
American, Anglo, British, English
Deer's Meadow
Boy/Male
Norse
God of weather.
UNDERSAMPLING
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