The path planning of the autonomous underwater vehicle (AUV) has shown great potential in various Internet Underwater Things (IoUT) applications. Although considerable efforts had been made, prior studies are confronted with some limitations. For one thing, existing work only uses ocean current simulation model without introducing real information, having not supported by data. another, traditional algorithms have strong environment dependence and lack flexibility: once changes, they need to...

The existing radio frequency identification (RFID) localization methods typically regard the initial phase of signal as constant. This is feasible when antenna and tag are stationary. However, in synthetic aperture radar (SAR) RFID localization, relative motion reader changes center orientation, thus resulting a continuous change phase. change, which will cause nonideal offset (NPO) and, thus, have an adverse effect on positioning, has been neglected most previous SAR studies. In this...

Sleep posture recognition is practically important in various scenarios such as sleep healthcare, bedridden patient care, and chronic disease diagnosis. With concerns of user privacy preserving, we prefer the wireless sensing methods to computer vision when dealing with recognition. However, existing suffer from at least one following major limitations: (i) difficult deploy practice; (ii) few categories; (iii) insufficient accuracy; (iv) poor generalization ability. In this paper, use...

The development of synthetic aperture radar (SAR) radio frequency identification (RFID) localization technology has taken the RFID based indoor research to a new level, among which holographic is most typical approach. Holographic SAR usually performs phase differential deal with problem unknown initial phase. However, problems regard have emerged in prior literature, some make system perform extra but useless efforts, affect comprehensibility algorithm, and even reduce reliability results....

Radio frequency identification (RFID) is one of the major wireless communication technologies and has been applied in supply chain retail network for a long time. By contrast, application RFID localization emerges recent years. Besides, neither precision nor real time existing methods satisfactory enough. In this article, we propose novel method called HyLoc tags based on hyperbolic model. The problem to locate modeled as solution equations formed by synthetic aperture radar (SAR). To solve...

Indoor localization systems based on radio frequency identification (RFID) technologies are widely adopted in the Internet of Things (IoT). Many these applications prefer to obtain relative position target object rather than absolute position. Existing positioning methods subject strict trajectory constraints and cannot work under nonstraight trajectories. RFID mobile which has high accuracy can also be used for positioning, but they require acquisition precise moving coordinates. To...

The high spatial resolution and displacement sensitivity of mmWave radar have significantly enhanced the performance wireless sensing. However, improved sensing capabilities also led to growing concerns about privacy leakage. Attackers can make fine-grained analysis various user activities by exploiting data. This article presents mmFilter, a privacy-level data filter designed protect privacy, which proposes signal reversion methodology perform targeted perturbations in specific feature...

The difficulty in obtaining targets' identity poses a significant obstacle to the pursuit of personalized and customized millimeter-wave (mmWave) sensing. Existing solutions that learn individual differences from signal features have limitations practical applications. This paper presents Personalized mmWave-based human Tracking system, PmTrack, by introducing inertial measurement units (IMUs) as indicators. Widely available portable devices such smartwatches smartphones, IMUs utilize...

Exploring and developing the perception system is an important means to promote development of intelligent transportation. In this paper, we propose RAPP, a radio tomography-based method enabling performance parameterization achieve parameter adjustment localization accuracy without dense deployment passive UHF RFID devices. The reader antenna takes rapid-moving as carrier generates virtual elements inventory received signal strength (RSS) pre-deployed tags. To eliminate impact lack tag...

This paper proposes an ultrahigh-frequency (UHF) radio frequency identification (RFID) based 3D mobile localization system (3DRML) for passive tags and tagged objects. Influenced by factors such as calculation model, grid scale phase center shift (PCS), prior RFID 2D methods are subject to certain restrictions in computational time accuracy. To overcome these limitations, 3DRML has the following features. First, achieves with low cost leveraging idea of reflection coefficient reconstruction...

In this paper, MUSE, an algorithm enabled by backscattering tag-to-tag network (BTTN) is presented to accomplish simultaneous 2-D localization of large-scale (10 m &#x00D7; 10 m) massive (20<inline-formula><tex-math notation="LaTeX">$\sim$</tex-math><alternatives><mml:math><mml:mo>&#x223C;</mml:mo></mml:math><inline-graphic xlink:href="ma-ieq1-3030039.gif"/></alternatives></inline-formula>50) passive UHF RFIDs. BTTNs, the most intractable problem high-frequency loss range measurements. a...

With the rapid development of Internet Things (IoT) technology, location based service in context awareness has received increasing attention. As one main localization technologies, UHF RFID technology been widely used many fields life and industry due to its advantages. In this article, we introduce a RFID-based system RF-SML, which is method for quickly accurately locating static objects via tag mobile reader. Specifically, utilizes idea multi-granularity order find high-probability region...

As a general rule, the multipath propagation will reduce reliability of radio frequency identification (RFID) based localization technologies. In this paper, we investigate reflection electromagnetic waves and polarization characteristics commonly used reader antennas tag antennas, model superposition signals, so that effect can be calculated using known environmental information. Based on model, novel reflector positioning algorithm is proposed, which estimate orientation, length location...

Radio-frequency identification (RFID) electronic license plate (RF-ELP) has been widely used to enable various automatic vehicle applications. Endowing RF-ELP with mobile sensing capabilities, such as localization and speed measurement is of practical importance, yet there no solution on the shelf. Moreover, position information essential for accurate measurement, while related RFID-based vehicular indoor methods suffer from at least one following major limitations: 1) difficult deploy in...

Presents corrections to the paper, Crucial or Unnecessary? Analysis on Phase Differential in Holographic SAR RFID Localization.