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We introduce a PIC/plasmonic-antenna hybrid structure to fully control phase, amplitude, and polarization of far-field radiation. Out-of-plane light collimating (δΦ ∼ 0.23rad), high-NA (∼0.65) beam focusing, and high-purity (∼99%) vector/vortex mode generation are demonstrated in simulation.
A potential data independent physical layer identification mechanism is proposed to defend against impersonation attacks and protect the privacy of the users with authenticated devices. A nonlinear function is derived from the impairments of a unique device to be used as the fingerprint in this mechanism and two methods are presented to learn this function. One is Kernel Regression which is commonly...
Under the Internet of Things (IoT), the coexistence proof of multiple RFID tagged objects becomes a very useful mechanism in many application areas such as health care, evidences in court, and stores. The yoking-proof scheme addresses this issue. However, all existing yoking-proof schemes require two or more rounds communication to generate the yoking-proof. In this paper, we investigate the design...
Dynamic spectrum sharing techniques applied in the UHF TV band have been developed to allow secondary WiFi transmission in areas with active TV users. This technique of dynamically controlling the exclusion zone enables vastly increasing secondary spectrum re-use, compared to the "TV white space" model where TV transmitters determine the exclusion zone and only "idle" channels...
The Magnetic Induction (MI)-based communication techniques enable the applications of wireless sensor networks (WSNs) in complex environments, such as underground and underwater environments. However, the complex environments usually consist of many conductive objects that can significantly enhance or block the MI signals. Efficient communications can be achieved if we can smartly utilize the positive...
In the last few decades, the development of miniature biological sensors able to detect and measure different phenomena at the nanoscale has led to transformative disease diagnosis and treatment techniques. Among others, biofunctional Raman nanoparticles have been utilized in-vitro and in-vivo for multiplexed diagnosis and detection of different biological agents. However, existing solutions require...
In the past few years, magnetic induction (MI) communication and networking have attracted significant attentions for wireless applications in underground, underwater, and many other complex and extreme environments. Although the technology is becoming more and more mature, there are still many research challenges, which prohibit MI from being widely applied. One of the most challenging task is to...
Nano-dielectric BiFeO3/LDPE films of different percentages including 0.2 wt% and 2 wt%, have been successfully prepared by using solution-melt blending method in the spiral double pole rheometer. This paper studies on effect of magnetic field induction on crystallization properties of BiFeO3/LDPE nano-dielectric. For the purpose of research on the effect of magnetization on the morphology and crystallization...
This paper addresses the coherent integration problem for detecting a maneuvering target with complex motions, involving range migration (i.e., range walk and range curvature) and Doppler frequency migration (DFM) within the coherent processing interval. A new method based on adjacent cross correlation function (ACCF) and fractional Fourier transform (FRFT) is proposed, where the ACCF operation is...
This paper considers the problems of the range migration (RM) and the Doppler frequency migration (DFM), which might appear in the detection of weak maneuvering target. We propose a novel coherent integration method to address these problems, which is based on the keystone transform (KT) and the matched filtering process (MFP), namely KT-MFP. In this algorithm, KT is firstly applied to correct the...
This paper considers the range walk (RW) problem for the high-speed moving target within the long coherent integration interval and proposes a new method, i.e., location rotation transform (LRT), to address the RW problem. In general, this method employs the rotation operation for the coordinate locations of echo data to eliminate the RW effect and then the Fourier transform (FT) is performed to coherently...
A large number of aviation equipment maintenance data exhibit seasonal behavior, such as aircraft failure rate. Consequently, seasonal forecasting problems are of considerable importance in aviation maintenance support. Aircraft failure rate is an important parameter of aviation equipment RMS (Reliability-Maintainability-Supportability). It is indispensable to scientifically predict the aircraft failure...
Magnetic Induction (MI) is a promising solution for wireless communications in complex environments, such as oil reservoir, underground, indoor, and underwater. Due to the inherent electrically small size and simple structure of the magnetic coil antenna, it suffers from low radiation efficiency, extremely narrow bandwidth, and dramatic polarization loss. Recently, significant efforts have been made...
Wireless Physical Layer Identification (WPLI) aims at identifying or classifying authorized devices based on the unique Radio Frequency Fingerprints (RFFs) to guarantee physical-layer security between each individual device. WPLI is a promising technique in the security area of Internet of Things (IoT), which avoids the burden of conventional software-level security in IoT on the computation capability,...
Alzheimer's disease (AD), which is the most common dementia, has become a critical social and medical problem. High throughput microarray technology make it feasible to have a view at the molecular level. Identifying potential genes at the molecular level which are discriminatory in AD affected versus healthy controls will greatly help understand the pathogenesis of AD as well as the diagnosis and...
Optical nano-antennas have been used for many applications in many contexts [1]. The possibilities to control both field enhancement and spatial distribution, to tune the resonant wavelength, and to design the local phase constitute unique assets that explain the popularity of plasmonic nano-antenna. In this work, we propose to use plasmonic nano-antennas integrated in a silicon photonic integrated...
Efficient coupling of light to single subwavelength structures is an important theme of many optical researches [1]. The extent to which a nanoscale object and the mode of an optical cavity are strongly coupled is determined by both cavity finesse and mode volume. In this context, a silica fiber tapered down to a few microns or smaller and then sandwiched between two integrated mirrors exhibits attractive...
Wireless Physical Layer Identification (WPLI) system aims at identifying or classifying authorized devices based on the unique Radio Frequency Fingerprints (RFFs) extracted from their radio frequency signals at the physical layer. Current works of WPLI focus on demonstrating system feasibility based on experimental error performance of WPLI with a fixed number of users. While an important question...
The efficient design of evolving smart grid faces serious challenges of a variety of malicious attacks. In this paper, the complex decision making processes between a network of electricity users that perform wireless meter data aggregation via other users and multiple sophisticated wireless attackers that are able to act as eavesdroppers and as jammers are investigated. We model the interactions...
Wireless communications in complex environments are constrained by lossy media and complicated structures. Magnetic Induction (MI) has been proved to be an efficient solution to extend the communication range. Due to the small coil antenna's physical limitation, however, MI's communication range is still very limited. To this end, Metamaterial-enhanced Magnetic Induction (M2I) communication has been...
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