Results 221 to 230 of about 4,726 (246)

Cyclic spectrum reconstruction from sub-Nyquist samples

2014 IEEE Global Communications Conference, 2014
Communication signals are often cyclostationary, that is they have statistical characteristics that vary periodically in time. In the frequency domain, this translates into correlation between spectral components of the signal. As a result, the cyclic spectrum, a characteristic function of the second-order moment of such signals, exhibits spectral ...
Deborah Cohen, Yonina C. Eldar
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Sub-Nyquist sampling of OFDM signals for cognitive radios

2014 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2014
We investigate sampling and detection of orthogonal frequency-division multiplexing (OFDM) signals with unknown carriers at sub-Nyquist rates. Efficient acquisition and processing of such broadcast signals is a challenge but constitutes a crucial part of enabling cognitive radios.
Tom Zahavy, Oran Shayer, Deborah Cohen, Alex Tolmachev, Yonina C. Eldar   +4 more
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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. >
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Active spectrum sensing with sequential sub-Nyquist sampling

2017 51st Asilomar Conference on Signals, Systems, and Computers, 2017
In this paper we propose a new receiver architecture for optimum active sequential sensing via sub-Nyquist sampling. The sensing strategy we propose is formulated as a sequential utility optimization problem, where the chosen utility functions strikes the desired balance between exploration and exploitation, typical in most spectrum sensing problem. To
Lorenzo Ferrari, Anna Scaglione
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A General Sub-Nyquist Sampling System for Pulse Streams

Circuits, Systems, and Signal Processing, 2019
The recent finite rate of innovation (FRI) framework has shown that pulse streams can be sampled at the rate of innovation and recovered from a set of Fourier coefficients. However, due to the individual variation of the pulse frequency spectrum, previous FRI sampling systems vary owing to different pulse shapes. In this paper, we propose a general sub-
Guoxing Huang, Ning Fu, Liyan Qiao
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A Sub-Nyquist Rate Sampling Receiver Exploiting Compressive Sensing

IEEE Transactions on Circuits and Systems I: Regular Papers, 2011
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Xi Chen, Zhuizhuan Yu, Sebastian Hoyos, Brian M. Sadler, José Silva-Martínez   +4 more
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An examination of the effects of sub-Nyquist sampling on SNR

SPIE Proceedings, 2012
Traditional compression involves sampling a signal at the Nyquist rate, then reducing the signal to its essential components via some transformation. By taking advantage of any sparsity inherent in the signal, compressed sensing attempts to reduce the necessary sampling rate by combining these two steps. Currently, compressive sampling operators are
Bruce Pollock, Nathan A. Goodman
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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
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Nonuniform compressive sampling at sub-Nyquist rates

2012 IEEE 11th International Conference on Signal Processing, 2012
A nonuniform compressive sampling digital signal processing method and its application in the frequency detection studied in this paper. The fundamental principle of nonuniform compressive sampling is explored, the nonuniform compressive sampling has being able to suppress the aliasing.
Xiaodong Zhang, Anmin Wang
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Sub-Nyquist Sampling of Single Tone Signal

2020 21st International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices (EDM), 2020
This paper demonstrates a method of single tone frequency measurement through preliminary amplitude predistortion in the two equalizers with opposite slope of transfer coefficients and a consequent sub-sampling. Theory of the method is discussed. Operability of the method in a several Nyquist zones successfully demonstrated experimentally.
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