On the TOA Estimation for UWB Ranging in Complex Confined Area

Chehri, Abdellah; Fortier, Paul; Tardif, Pierre-Martin

doi:10.1109/issse.2007.4294530

Cited by 16 publications

(6 citation statements)

References 10 publications

(8 reference statements)

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“…Therefore, the complexity of the time delay estimator in the optimal receiver is very difficult. However, more practical time delay estimation algorithms have recently been proposed, the most often used is based on an energy detection receiver due to its low implementation complexity [9][10][11][12][13][14][15][16][17][18][19][20].…”

Section: Methodsmentioning

confidence: 99%

Time delay estimation for UWB non coherent receiver in indoor environment, from theory to practice

Chehri

Fortier

Tardif

2018

J Wireless Com Network

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Extracting parameter estimates from noisy observations of an underlying signal is a common problem in many fields. Time delay estimation (TDE) is essential for many areas, such as localization, array processing, and radar. The performance of any estimator is often evaluated via the mean square error (MSE) that can then be compared to analytical MSE lower bounds. In this paper, we first analyze a maximum likelihood (ML) estimator based on the knowledge of noisy second order statistics of the channel. We investigate lower bounds for the time delay estimation error for ultra-wideband ranging systems operating in realistic multipath environments. Based on the Cramer-Rao lower bound (CRLB), we derive analytically a lower bound of the time delay estimation calculated using the Karhunen-Loève decomposition of the estimated channel autocorrelation matrix. Also, we investigate the practical implementation (based on energy detection) of the time delay estimator. In the second part of the paper, we have analyzed the time delay estimation performances with the energy maximization receiver. Simulations are evaluated using a simulated UWB underground mine channel. This can be considered as the first step for a global positioning system for use mining industry.

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Section: Methodsmentioning

confidence: 99%

Time delay estimation for UWB non coherent receiver in indoor environment, from theory to practice

Chehri

Fortier

Tardif

2018

J Wireless Com Network

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“…The potential of RISs for various applications and anticipated performance as a function of their size, sub-wavelength structure, and near-field vs. far-field operation forms an open research question. Furthermore, radio mapping and localization might be considered key enablers for realizing important communication-related activities [120][121][122].…”

Section: Rf Sensing and Localizationmentioning

confidence: 99%

Reconfigurable Intelligent Surfaces for 5G and beyond Wireless Communications: A Comprehensive Survey

2021

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With possible new use cases and demanding requirements of future 5th generation (5G) and beyond cellular networks, the future of mobile communications sounds promising. However, the propagation medium has been considered a randomly acting agent between the transmitter and the receiver. With the advent of the digital age of wireless communications, the received signal quality is degrading due to the uncontrollable interactions of the transmitted radio waves with the surrounding artifacts. This paper presents a comprehensive literature review on reconfigurable intelligent surfaces (RISs) and assisted application areas. With the RIS, the network operators can control radio waves’ scattering, reflection, and refraction characteristics by resolving the harmful properties of environmental wireless propagation. Further, the RIS can effectively control the wavefront, such as amplitude, phase, frequency, and even polarization, without requiring complex encoding, decoding, or radio wave processing techniques. Motivated by technological advances, the metasurfaces, reflectarrays, phase shift, and liquid crystals are potential candidates for implementing RIS. Thus, they can be considered the front runner for realizing the 5G and beyond network. Furthermore, the current research activities in the evolving field of wireless networks operated by RIS are reviewed and discussed thoroughly. Finally, to fully explore the potential of RISs in wireless networks, the fundamental research issues to be addressed have been discussed.

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“…Such an effect is due to the well-known penetration power (dependent on the radio frequency and the composition of the obstructing object) of radio waves. Such penetration capabilities underpin so-called 'see-through-the wall' radars [23] and Ultra-Wide-Band (UWB) location systems [24], [25]. Recent advanced deployments have demonstrated virtual LoS detection through 20cm thick concrete walls [23].…”

Section: The Decrypting Regionmentioning

confidence: 99%

Quantum Geo-Encryption

Malaney¹

2016

2016 IEEE Global Communications Conference (GLOBECOM)

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Abstract-In this work we introduce the concept of quantum geo-encryption -a protocol that invokes direct quantum encryption of messages coupled to quantum location monitoring of the intended receiver. By obfuscating the quantum information required by both the decrypting process and the location verification process, a communication channel is created in which the encrypted data can only be decrypted at a specific geographic locale. Classical wireless communications can be invoked to unlock the quantum encryption process thereby allowing for any deployment scenario regardless of the channel conditions. Quantum geo-encryption can also be used to realize quantumcomputing instructions that can only be implemented at a specific location, and allow for a specified geographical data-route through a distributed network. Here we consider the operational aspects of quantum geo-encryption in generic Rician channels, demonstrating that the likelihood of a successful spoofing attack approaches zero as the adversary moves away from the allowed decrypting location. The work introduced here resolves a longstanding quest to directly deliver information which can only be decrypted at a given location free of assumptions on the physical security of a receiver.

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On the TOA Estimation for UWB Ranging in Complex Confined Area

Cited by 16 publications

References 10 publications

Time delay estimation for UWB non coherent receiver in indoor environment, from theory to practice

Time delay estimation for UWB non coherent receiver in indoor environment, from theory to practice

Reconfigurable Intelligent Surfaces for 5G and beyond Wireless Communications: A Comprehensive Survey

Quantum Geo-Encryption

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