Novel Photonic Analog-to-Digital Converter Architecture for Precise Localization of Ultra-Wide Band Radio Transmitters

Llorente, Roberto; Morant, María; Amiot, Nicolas; Uguen, Bernard

doi:10.1109/jsac.2011.110619

Cited by 10 publications

(4 citation statements)

References 8 publications

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“…Several photonic approaches to AOA measurement or location detection have been demonstrated . A fiber‐connected ultrawideband (UWB) sensing network for high‐resolution localization, for example, was demonstrated based on optical time‐division multiplexing (OTDM) .…”

Section: Photonic Measurement Of Angle‐of‐arrivalmentioning

confidence: 99%

Photonics for microwave measurements

Zou

Lü

Pan

et al. 2016

Laser & Photonics Reviews

304

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As an emerging topic, photonic-assisted microwave measurements with distinct features such as wide frequency coverage, large instantaneous bandwidth, low frequencydependent loss, and immunity to electromagnetic interference, have been extensively studied recently. In this article, we provide a comprehensive overview of the latest advances in photonic microwave measurements, including microwave spectrum analysis, instantaneous frequency measurement, microwave channelization, Doppler frequency-shift measurement, angle-of-arrival detection, time-frequency analysis, compressive sensing, and phase-noise measurement. A photonic microwave radar, as a functional measurement system, is also reviewed. The performance of the photonic measurement solutions is evaluated and compared with the electronic solutions. Future prospects using photonic integrated circuits and software-defined architectures to further improve the measurement performance are also discussed.

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Section: Photonic Measurement Of Angle‐of‐arrivalmentioning

confidence: 99%

Photonics for microwave measurements

Zou

Lü

Pan

et al. 2016

Laser & Photonics Reviews

304

View full text Add to dashboard Cite

show abstract

“…The wideband signal acquisition, such as wideband radars, electronic monitor, high-speed optical and wireless communications, requires high performance analog-todigital conversion (ADC) [1][2][3]. However, limited by the inherent aperture jitter of sampling clock and comparator ambiguity, it is a big challenge for the current electronic ADCs to digitize analog signals with a sampling rate over tens of gigahertz while keeping high resolution [4].…”

Section: Introductionmentioning

confidence: 99%

A Photonic Digitization Scheme With Enhanced Bit Resolution Based on Hierarchical Quantization

et al. 2020

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The major limitation of the photonic digitization schemes based on the phase-shifting of modulation transfer function lies in its relatively low bit resolution, which is log2(2N), where N is the number of optical channels or modulators. In this paper, we propose a novel photonic digitization scheme based on hierarchical quantization, which could greatly improve the system resolution with a relatively simple configuration. It is shown that 6N quantization levels, can be realized by using only three Mach-Zehnder modulators (MZMs) and a hierarchical quantization module (HQM) in the proposed scheme. By adjusting the fine quantization module inside HQM, the system resolution can be enhanced greatly. A proof-of-concept experiment is implemented, which fully verifies the correctness of the approach. Since simpler configuration and higher resolution are achieved, the proposed scheme provides a promising solution for high-performance photonic analog-to-digital conversion.INDEX TERMS analog-to-digital conversion, hierarchical quantization, ENOB.

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“…Digitization of wideband signals is essential for a wide range of applications, such as advanced radar systems, electronic monitor, real-time signal processing and spread spectrum communications [1]- [3]. Limited by the inherent aperture jitter of sampling clock and comparator ambiguity, it is very hard to digitize the analog signals with wide bandwidth (i.e., over several tens of GHz) while keeping high resolution by using conventional electronic devices [4].…”

Section: Introductionmentioning

confidence: 99%

Photonic Digitization With Differential Encoding Based on Orthogonal Vector Superposition

et al. 2019

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In this paper a novel photonic digitization scheme with differential encoding based on orthogonal vector superposition (OVS) is proposed and demonstrated. A phase modulator (PM) and two delay-line interferometers (DLIs) with π/2 difference in bias phase are employed to generate two orthogonal modulated signals. By adjusting and combining the intensity of two orthogonal signals with an OVS module, the desired phase shifts among different transfer functions can be obtained. The proposed scheme can differentially encode the input signal with enhanced bit resolution. Compared with the existing photonic digitization schemes based on modulators, this scheme features its simple configuration, because only a single PM, two DLIs and an OVS module are required; moreover, since the desired phase shifts of transfer functions are realized by attenuating the signal intensities, the proposed scheme can effectively alleviate the problem of phase bias drift induced by modulators. Proof-of-concept experiments of 3-and 4-bit photonic digitization systems based on OVS are successfully carried out, which demonstrate the feasibility of the approach.

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Novel Photonic Analog-to-Digital Converter Architecture for Precise Localization of Ultra-Wide Band Radio Transmitters

Abstract: International audienc

Cited by 10 publications

References 8 publications

Photonics for microwave measurements

Photonics for microwave measurements

A Photonic Digitization Scheme With Enhanced Bit Resolution Based on Hierarchical Quantization

Photonic Digitization With Differential Encoding Based on Orthogonal Vector Superposition

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