Results 211 to 220 of about 4,726 (246)

Compressive sensing and sub-Nyquist sampling

IEEE Instrumentation and Measurement Magazine, 2020
The Nyquist-Shannon sampling theorem states that if all that you know about a signal is that its highest frequency is no greater than B, then if you want to sample the signal without any loss of information, you must sample it at a rate that is greater than 2B.
Roi Arie, Avraham Brand, Shlomo Engelberg   +2 more
exaly   +2 more sources

Wideband Spectrum Sensing Based on Sub-Nyquist Sampling

IEEE Transactions on Signal Processing, 2013
In this paper, we consider the problem of locating multiple active spectrum subbands in a wide range of frequency bands. A major challenge associated with such wideband spectrum sensing is that it is either infeasible or too expensive to perform Nyquist sampling on the wideband signal.
Chia-Pang Yen, Xiaodong Wang
exaly   +2 more sources

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

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 Sampling for Target Detection in Clutter

2018 IEEE 10th Sensor Array and Multichannel Signal Processing Workshop (SAM), 2018
We analyze target detection for sub-Nyquist radar in an environment with clutter. The target is assumed to be a Gaussian point target and the clutter a stationary Gaussian random process. The optimal detector and detection probability under the Neyman-Pearson criterion is derived.
Yang Li 0047, Qian He 0002, Rick S. Blum, Kumar Vijay Mishra   +3 more
openaire   +1 more source

The algorithms of sub-Nyquist sampling on TV

Proceedings. IEEE Energy and Information Technologies in the Southeast', 2003
A component color TV signal called the TCM signal is proposed, and an algorithm of subsampling on the TCM signal is described. Results both from computer simulation and hardware display show that the picture quality of this method is satisfactory. A 3-D subsampling algorithm is proposed.
D. Xu, Z.-Y. Quan
openaire   +1 more source

Cyclostationary feature detection from sub-Nyquist samples

2011 4th IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP), 2011
Wideband spectrum sensing which requires detecting the presence or absence of signals in a wideband channel faces multiple practical issues. Current bandwidth limitations of state-of-the-art analog to digital converters require alternative approaches to be considered for wideband sensing.
Deborah Cohen, Eric Rebeiz, Varun Jain, Yonina C. Eldar, Danijela Cabric   +4 more
openaire   +1 more source

Aliasing-tolerant sub-Nyquist sampling of FRI signals

2013 IEEE International Conference on Communications (ICC), 2013
This paper addresses the sampling of Finite Rate of Innovation (FRI) signals and proposes new lower bounds for accurate reconstruction. Recently, the FRI approach has been established next to the Compressed Sensing framework to deal with signals which are sparse in their parametric description.
Andre Angierski, Volker Kühn 0001
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

A novel Sub-Nyquist sampling of sparse wideband signals

2013 IEEE International Conference on Acoustics, Speech and Signal Processing, 2013
We propose a Sub-Nyquist sampling scheme using only one mixer, one filter bank with M subfilters and M low rate ADCs. Compared to the MWC (Modulated Wideband Converter) system in [1], the proposed sampling system has several complexity advantages. First, due to the use of only one mixer, the hardware complexity for analog circuits is significantly ...
Chia-Hua Lin, Shang-Ho Tsai, Gene C. H. Chuang   +2 more
openaire   +1 more source