Results 241 to 250 of about 19,817 (256)

Sub-Nyquist Sampling of Multiple Sinusoids

IEEE Signal Processing Letters, 2018
In this letter, we propose new sub-Nyquist sampling schemes for multiple sinusoids, which require fewer number of samples than previous works. Since it is impossible to resolve the frequency ambiguity using a single sub-Nyquist sample sequence, an additional sampling channel is used to determine the correct frequencies. First, a time-staggered sampling
Ning Fu, Guoxing Huang, Le Zheng, Xiaodong Wang   +3 more
openaire   +1 more source

Antialiasing Encoder Interface With Sub-Nyquist Sampling

IEEE Transactions on Instrumentation and Measurement, 2006
A technique is presented for reconstructing absolute position or angle from time-sampled outputs of incremental encoders. Unlike existing techniques, the new method is able to track analog quadrature outputs with frequency contents higher than the Nyquist frequency.
Zachary D. Buckner, Michael L. Reed, James H. Aylor   +2 more
openaire   +1 more source

Sub-Nyquist Interferometry -- Review and Status

Workshop on Optical Fabrication and Testing, 1987
Sub-Nyquist interferometry (SNI) is a new method of data analysis for phase-shifting interferometry (PSI) that greatly extends the measurement range of an interferometer for a given amount of data.1 This paper reviews the concept and principles of SNI, and details the progress towards a practical implementation of the technique.
openaire   +1 more source

Sub-Nyquist sampling achieves optimal rate-distortion

2015 IEEE Information Theory Workshop (ITW), 2015
The minimal sampling frequency required to achieve the rate-distortion function of a Gaussian stationary process is analyzed. Although the Nyquist rate is the minimal sampling frequency that allows perfect reconstruction of a bandlimited signal from its samples, relaxing perfect reconstruction to a prescribed distortion may allow a lower sampling ...
Alon Kipnis, Andrea J. Goldsmith, Yonina C. Eldar   +2 more
openaire   +1 more source

Sub-Nyquist Interferometry: Results And Implementation Issues

SPIE Proceedings, 1990
Phase-shifting interferometry (PSI) is the generally accepted technique for data acquisition and computer analysis of interferometric patterns. General purpose instruments that use this technique for the measurement of spheres and flats are available from a number of vendors.
Russell J. Palum, John E. Greivenkamp
openaire   +1 more source

Sub-Nyquist Bandpass Sampling

2023 25th International Conference on Digital Signal Processing and its Applications (DSPA), 2023
Vladislav Lesnikov, Tatyana Naumovich, Alexander Chastikov, Dmitriy Dubovcev   +3 more
openaire   +1 more source

Decentralized regression with asynchronous sub-Nyquist sampling

2014 48th Asilomar Conference on Signals, Systems and Computers, 2014
When capturing data on a sensor field to uncover its latent structure, there are often nuisance parameters in the observation model that turn even linear regression problems into non-convex optimizations. One common case is the lack of common timing source in ADCs, therefore samplings are done with time offsets.
Hoi-To Wai, Anna Scaglione
openaire   +1 more source

Sub-Nyquist sampling of NTSC video

IEEE 1988 International Conference on Consumer Electronics Digest of Technical Papers., 2003
For deghosting purposes, both the in-phase and quadrature parts of the vestigial sideband TV signal are needed. This new scheme can reduce the sampling rate to lower than the Nyquist rate of either part. It comprises sampling rate reduction and complex signal processing for signal recovery. >
openaire   +1 more source

Sub-nyquist audio fingerprinting for music recognition

2010 2nd Computer Science and Electronic Engineering Conference (CEEC), 2010
In recent years, Compressive Sampling (CS), a new research topic in signal processing, has piqued interest of a wide range of researchers in different fields. In this paper, we present a sub-Nyquist Audio Fingerprinting (AF) system for music recognition, which utilizes CS theory to generate a compact audio fingerpint, and to achieve significant ...
Chang, Kaichun K., Pissis, Solon P., Jang, Jyh-Shing R., Iliopoulos, C.S.   +3 more
openaire   +2 more sources

Signal Sensing with Sub-Nyquist Cyclic Feature

2016
Compressive sensing can be applied to reconstruct the signal with far fewer measurements than what is usually considered necessary. While in many scenarios, such as spectrum detection and modulation recognition, we only expect to acquire useful characteristics rather than the original signals.
Sese Wang, Zhuo Sun, Weichen Zhao, Xuantong Chen, Haiwen Luo   +4 more
openaire   +1 more source