sub-Nyquist sampling

sub-Nyquist sampling

[¦səb ′nī‚kwist ‚sam·pliŋ]
(communications)
Any technique of sampling an analog signal at a rate lower than the Nyquist rate in such a way as to preserve signal content without aliasing distortion.
In particular, the sampling of television signals at a rate lower than the Nyquist rate and at an odd multiple of the frame rate, so that the aliasing components are placed into periodically spaced voids in the television spectrum where they can be removed by a comb filter at the receiver.
Mentioned in ?
References in periodicals archive ?
Yen, C.-P., Tsai, Y., y Wang, X., Wideband Spectrum Sensing Based on Sub-Nyquist Sampling, doi: 10.1109/TSP.2013.2251342, IEEE Transactions on Signal Processing, 61(12), 3028- 3040 (2013)
Compressed sampling (i.e., combined sampling with compression operations) as the efficient method to achieve real-time spectrum estimation at a sub-Nyquist sampling rate has attracted substantial research efforts, which is motivated by the fact that there are plenty of temporarily unemployed spectrum holes in the wideband scenario.
The CS theory states that [r.sup.j.sub.t] can be accurately reconstructed by using a sub-Nyquist sampling rate; that is, [f.sub.s] < 2([f.sub.u] - [f.sub.d]).
Sadle, "Cyclic Feature Detection With Sub-Nyquist Sampling for Wideband Spectrum Sensing," IEEE Journal of Selected Topics in Signal Processing, vol.6, no.
To achieve our overreaching goal we focus on three interconnected objectives -- developing the 1) theory 2) hardware and 3) applications of sub-Nyquist sampling.Our methodology ties together two areas on the frontier of signal processing: compressed sensing (CS), focused on finite length vectors, and analog sampling.
Eldar, "From theory to practice: sub-Nyquist sampling of sparse wideband analog signals," IEEE Journal on Selected Topics in Signal Processing, vol.
Subsequently, the analog to digital converter (ADC) with a Nyquist sampling rate is changed into an analog to information (A2I) converter with a sub-Nyquist sampling rate by a switch.
Sadler, Cyclic feature detection with sub-Nyquist sampling for wideband spectrum sensing, IEEE Journal of Selected Topics in Signal Processing, vol.
An alternative Xampling method uses the Sum of Sincs filter, following by uniform sampling of the output with sub-Nyquist sampling rate as described in [11].
Compressed sensing (CS) allows sensing of sparse signals at sub-Nyquist sampling rates, and their reliable signal recovery via computationally efficient algorithms [8-10].
Li, "Deception jamming method for ISAR based on sub-Nyquist sampling technology," ICSP'2010 Proceedings, 2023-2026, 2010.
It has been explored for a wide range of applications, such as: medical imaging [15-18], radar imaging [19-26], sub-Nyquist sampling systems [27, 28], channel coding [29, 30], single-pixel cameras [31], and etc..