Results 21 to 30 of about 292,061 (298)
A hardware prototype of sub‐Nyquist radar with unknown pulses
Electronics Letters, 2021 In a conventional radar system, the hardware cost increases with the sampling rate of the receiver. Sub‐Nyquist radar systems operate at lower sampling rates and hence reduce the hardware cost and complexity. A sub‐Nyquist radar system uses the knowledge
Satish Mulleti +3 more
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Wideband spectrum sensing based on modulated wideband converter with nested array
IET Communications, 2021 Several spectrum sensing systems based on sub‐Nyquist sampling have been extensively studied to deal with difficulties of traditional wideband spectrum sensing in cognitive radio (CR) networks.
Qiuyue Li, Zhi Li, Jian Li
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Deep Unfolded Recovery of Sub-Nyquist Sampled Ultrasound Images
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2021 The most common technique for generating B-mode ultrasound (US) images is delay and sum (DAS) beamforming, where the signals received at the transducer array are sampled before an appropriate delay is applied. This necessitates sampling rates exceeding the Nyquist rate and the use of a large number of antenna elements to ensure sufficient image quality.
Alon Mamistvalov, Yonina C. Eldar
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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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Sub-Nyquist Sampling in Shift-Invariant Spaces
2020 28th European Signal Processing Conference (EUSIPCO), 2021 We introduce a novel framework for acquisition of analog signals by combining compressive sensing (CS) and the shift-invariant (SI) reconstruction procedure. We reinterpret the random demodulator as a system that acquires a linear combination of the samples in the conventional SI setting with the box function as the sampling kernel.
Vlašić, Tin, Seršić, Damir
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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
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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
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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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High-Fidelity Compressive Heart Rate Tracking
IEEE Access, 2023 Recently, photoplethysmography sensors in smart watches have been frequently used to monitor heart rate. Because a photoplethysmography sensor flashes light on the skin and measures the reflected light, the rate of flashing and sampling is directly ...
Seungyoon Nam +2 more
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IEEE Access, 2020 In recent years, wideband spectrum sensing combined with sub-Nyquist sampling and compressed sensing technology in the field of cognitive radio has received widespread attention.
Jiai He, Wei Chen, Lu Jia, Tong Wang
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