Results 21 to 30 of about 19,817 (256)
Distortion-Rate Function of Sub-Nyquist Sampled Gaussian Sources [PDF]
, 2015 The amount of information lost in sub-Nyquist sampling of a continuous-time Gaussian stationary process is quantified. We consider a combined source coding and sub-Nyquist reconstruction problem in which the input to the encoder is a noisy sub-Nyquist ...
Eldar, Yonina C. +3 more
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Channel Capacity under General Nonuniform Sampling [PDF]
, 2012 This paper develops the fundamental capacity limits of a sampled analog channel under a sub-Nyquist sampling rate constraint. In particular, we derive the capacity of sampled analog channels over a general class of time-preserving sampling methods ...
Chen, Yuxin +2 more
core +1 more source
Clutter Removal in Sub-Nyquist Radar [PDF]
IEEE Signal Processing Letters, 2015 Recently, a new approach to sub-Nyquist sampling and processing in pulse-Doppler radar was introduced, based on the Xampling approach to reduced-rate sampling combined with Doppler focusing performed on the low-rate samples. This method imposes no restrictions on the transmitter, reduces both the sam- pling and processing rates and exhibits linear ...
Yonina C. Eldar, Roei Levi, Aharon Cohen
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A Sub-Nyquist Uniform Linear Array Receiver Design
IEEE Access, 2021 A design of sub-Nyquist uniform linear array receiver with different sampling rates is proposed, investigated, and reported in this paper. The proposed architecture increases functionality of conventional linear array receiver with modest modifications ...
Chi-Hao Cheng
doaj +1 more source
Random sub-Nyquist polarimetric modulator [PDF]
Applied Optics, 2016 We show that it is possible to measure polarization with a polarimeter that gets rid of the seeing while still measuring at a frequency well below that of the seeing. We study a standard polarimeter made of two retarders and a beamsplitter. The retarders are modulated at $\sim 500$ Hz, a frequency comparable to that of the variations of the refraction ...
openaire +3 more sources
High-speed, sub-Nyquist interferometry
Optics Express, 2011 The velocity measurement limit in dynamic interferometry is vNyq, the velocity at which the interferogram is sampled at the Nyquist limit. We show that vNyq can be exceeded by assuming continuity of the surface motion and unwrapping the velocity modulo 2vNyq.
Tao, Wu +2 more
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Tensor Completion From Regular Sub-Nyquist Samples
IEEE Transactions on Signal Processing, 2020 Signal sampling and reconstruction is a fundamental engineering task at the heart of signal processing. The celebrated Shannon-Nyquist theorem guarantees perfect signal reconstruction from uniform samples, obtained at a rate twice the maximum frequency present in the signal.
Charilaos I. Kanatsoulis +3 more
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IEEE Photonics Journal, 2018 Delay-division-multiplexing (DDM) involves the use of signal preprocessing for the detection of data via sub-Nyquist analog-to-digital sampling, based on preallocated relative sampling delays among optical network users (ONUs) in an orthogonal frequency ...
Jhih-Hao Hsu +7 more
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Assessment of sub-Nyquist deterministic and random data sampling techniques for operational modal analysis [PDF]
, 2016 This paper assesses numerically the potential of two different spectral estimation approaches supporting non-uniform in time data sampling at sub-Nyquist average rates (i.e., below the Nyquist frequency) to reduce data transmission payloads in wireless ...
Agathoklis Giaralis +11 more
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Low Complexity Sub-Nyquist Wideband Spectrum Sensing for Cognitive Radio
IEEE Access, 2018 In order to provide more available spectrum and quickly switchover, wideband spectrum sensing (WSS) is desirable for cognitive radio. Sub-Nyquist sampling is crucial for WSS to reduce energy and computational costs, while the existing algorithms based on
Jian Yang, Min Jia, Xuemai Gu, Qing Guo
doaj +1 more source