Efficient realization of random demodulator-based analog to information converters

Massoud, Yehia; Smaili, Sami; Singal, Vikas

doi:10.1109/biocas.2011.6107745

Cited by 14 publications

(4 citation statements)

References 7 publications

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“…The term δα I is a noise term and the reconstruction error is related to the value of this term. Namely, if the signalα is the reconstructed signal from the measurements y, then the error in reconstructionα − α S satisfies α − α S ≤ε (8) whereε = δα I ∞ is the maximum entry in the vector δα I .…”

Section: Theoretical Foundationsmentioning

confidence: 99%

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A Multi-Channel Random Demodulation Reconfigurable Receiver

Smaili

Massoud

2014

IEEE Wireless Commun. Lett.

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In this letter, we propose a new approach to reconfigurable receivers using random acquisition techniques. Random projections have been widely used within the context of compressive sensing for sub-Nyquist signal acquisition. In the system we propose, we design the random sensing signals so as to filter undesired components in the signal and result in measurements equivalent to those obtained had the signal been filtered prior to acquisition. Because the random signals are digitally generated, the system is reconfigurable; the signal's components to be filtered can be changed by changing the digitally generated random signals. The system digitizes the measurements at a rate proportional to the desired bandwidth only, not the total signal bandwidth.

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Section: Theoretical Foundationsmentioning

confidence: 99%

“…The measurements are obtained by projecting this signal on a set of random signals, p i (t), that are digitally generated from discrete-time random sequences p i [n]. The ith measurement is given by [8] y…”

Section: A Signal Model and System Representationmentioning

confidence: 99%

A Multi-Channel Random Demodulation Reconfigurable Receiver

Smaili

Massoud

2014

IEEE Wireless Commun. Lett.

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“…That's why, the proposed W-MMA expresses the large optical absorption window which cover the entire visible and short IRwavelengths. [91][92][93][94][95][96][97][98][99][100][101][102][103][104][105][106][107][108][109][110]. The angular robustness is the key and important feature of any meta-device.…”

Section: Simulation Study and Analysismentioning

confidence: 99%

Tungsten Supported Plasmonic Nanoscale Absorber for Solar Thermal Photovoltaics Applications

Rana¹,

Khan²,

Batool³

et al. 2022

Preprint

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Current and modern photovoltaics energy systems require miniaturized, ultrathin, compact and high efficiency absorbing and optical devices. So, by keeping these challenges in mind and inspired by the artificially engineered materials, called metamaterials, a high bandwidth optical nanostructured based absorbing device is presented in this report. The design geometry of the proposed nano-absorber comprises an array of nano-circular antennas, etched on a dielectric spacer, aluminium nitride (AlN) which is coated by a thick reflecting layer of silver from the backside. Surprisingly, the design absorber offers high absorption value of above 90% across the large operational wavelengths starting from 400 to 1500 nm. The constituting nano-antennas induces plasmonic resonance features, which enables the localized surface plasmon and results in an enhanced absorption. The nanoscale absorber is also investigated under the excitation of polarization and oblique incident angles of the incoming optical light. Finally, the plasmonic metal, tungsten (W) offers high melting point so that it can sustain under the high-energy photon particles. As compared to previous published work related to plasmonic absorbers, this work provide ultra-compact geometry, easily manufactured design, super bandwidth and polarization insensitivity. So, this can be used for the applications of thermophotovoltaics and energy harvesting etc.

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“…Recent developments in the theory of compressive sampling has lead to the emergence of new radio receivers that can digitize signals at sampling rates below the Shannon-Nyquist limit thus reducing the rates at which analog-todigital converters (ADC) in radio receivers operate [2]- [11]. Such a reduction in the sampling rates of ADCs has two major implications: it causes the power consumption of ADCs to drop tremendously and it reduces the amount of data by reducing the number of acquired samples, both becoming increasingly critical requirements in such systems as biomedical systems, mobile devices, sensor networks, among others [12]- [15].…”

Section: Introductionmentioning

confidence: 99%

A wide band reconfigurable radio using compressive sensing

Smaili

Massoud

2012

WAMICON 2012 IEEE Wireless &Amp; Microwave Technology Conference

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The tremendous advancement in communications technology and its use in a wide range of applications have increased the importance of high bandwidth reconfigurable receivers that can monitor a large bandwidth and be reconfigured to receive signals within a specific subband. Because of the stringent power and size requirements in most applications for communications systems, it is important to achieve such high surveillance bandwidth and reconfigurability with the minimum possible power consumption and hardware components. In this paper we propose a high bandwidth radio receiver based on the newly emerging theory of compressive sensing. The proposed receiver can reconstruct signals in a specific sub-band within a wide surveillance band using an analog-to-digital converter running at a rate comparable to the sub-band bandwidth, and much less than the surveillance bandwidth. The desired band to be reconstructed can be changed in software thus eliminating the use of many bandpass filters.

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Efficient realization of random demodulator-based analog to information converters

Cited by 14 publications

References 7 publications

A Multi-Channel Random Demodulation Reconfigurable Receiver

A Multi-Channel Random Demodulation Reconfigurable Receiver

Tungsten Supported Plasmonic Nanoscale Absorber for Solar Thermal Photovoltaics Applications

A wide band reconfigurable radio using compressive sensing

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