Vehicle-to-vehicle (V2V) communication is an enabler for improved traffic safety and congestion control. As any wireless system, the ultimate performance limit determined by propagation channel. A particular point of interest shadowing effect large vehicles such as trucks buses, this might affect range significantly. In paper we present measurement results model channel, in which a bus acts either object or relay between two passenger cars. The setup based on Wireless Open-Access Research...

Indoor positioning system (IPS) plays an important role in the applications of Internet Things (IoT), including intelligent hospital, logistics, and warehousing. Ultrawideband (UWB)-based IPS has shown superior performance due to its strong multipath resistance high temporal resolution. However, non-line-of-sight (NLOS) situations noticeably degrade both accuracy communication reliability. To address this issue, we first propose a support vector machine (SVM)-based channel detection method...

Cooperative localization can enhance the accuracy of wireless network by incorporating range information among agent nodes in addition to those between agents and anchors. In this paper, we investigate optimal allocation restricted resources, namely, power bandwidth, different nodes. We formulate optimization problems for both synchronous networks asynchronous networks, where one way round trip measurements are applied estimation, respectively. Since nonconvex, develop an iterative...

Cooperative coordination at unsignalized road intersections, which aims to improve the driving safety and traffic throughput for connected automated vehicles, has attracted increasing interests in recent years. However, most existing investigations either suffer from computational complexity or cannot harness full potential of infrastructure. To this end, we first present a dedicated intersection framework, where involved vehicles hand over their control authorities follow instructions...

The recently proposed orthogonal time frequency space (OTFS) modulates the data in delay-Doppler domain, thereby 2-D diversity gain can be obtained to improve communication performance over time-varying channels. However, matrix-inversion based detectors have pretty high complexity OTFS systems due large size of channel matrix. This letter proposes a low matched filtering message passing detector (MF-MPD), combined with novel probability clipping (PC) solution. Benefit from processing, and...

High-precision location information formulates the basis of modern Internet Things (IoT). However, since navigation signals from global satellite systems (GNSSs) are frequently attenuated or blocked in urban areas, reliable and high accuracy positioning alternatives thus required for ground devices (GDs). Due to advantages their flexible deployment extensive coverage, unmanned aerial vehicles (UAVs) show significant potential this localization enhancement system. In article, we propose a UAV...

WiFi fingerprint-based localization has been intensive studies as a promising technology of ubiquitous location-based services. Two main concerns for its wide spread applications are to tackle with the cumbersome efforts site survey and combat vulnerable environment changes. To address these issues comprehensively, we propose novel approach on adaptive less survey, named LESS, by exploring new paradigm radio map construction adaptation few-shot relation learning. Firstly, extend sparsely...

In this paper, based on the horn dipole antenna unit, integrated array can meet requirements of high gain, efficiency and integration millimeter wave wireless communication. The consists five metal elements arranged equidistant, two opposite symmetrical segments with dielectric plates as dipoles are fed between plates. Dielectric plate is made Teflon, a frequency composite material, which widely used in signal transmission microwave communication, its constant very low. Achieve below -10dB...

This study investigated the expression and clinical significance of coiled-coil domain containing 12 (CCDC12) in initial diagnosis acute myeloid leukemia (AML). A total 80 AML patients were enrolled as experimental group, 20 normal bone marrow specimens used control group. Clinical data collected. The level CCDC12 was measured using real-time fluorescent quantitative PCR (QRT-PCR) both groups. relationship between pathological characteristics prognosis analyzed. Kaplan-Meier curves to...

In modern transportation systems, the road intersections where multiple roads merge usually become traffic bottleneck. Existing coordination solutions such as signs tend to be ineffective. order exploit full potential of infrastructure, we try address optimal vehicle problem, by which throughput can maximized. We first formulate it a general centralized collision-free scheduling framework. The involved vehicles could cooperate via instructions from center, solving essential non-convex...

In recent years, the Internet of Things (IoT) has caught substantial attention as a pivotal technology to support connectivity for massive devices and sensors. With increasing demands reliable continuity IoT, non-terrestrial networks (NTNs) are developed provide ubiquitous coverage broadband service IoT devices. this article, we present UAV-Satellite architecture perform localization communication in an integrated way. This innovative, cost-effective, flexible network opens up way seamless...

Wireless technologies like wireless fidelity (WIFI) and ZigBee have drawbacks such as short communication distances or high-power consumption, the half-duplex nature of long range (LoRa) communication, traditional solutions generally use time division multiple access (TDMA) polling methods，cannot provide differentiated services. Therefore, based on an extensible awning structure with fans wet protocol combining TDMA random delayed competitive delay (ALOHA) is proposed, which allows for...

Electroencephalography (EEG) serves as a practical auxiliary tool deployed to diagnose diverse brain-related disorders owing its exceptional temporal resolution, non-invasive characteristics, and cost-effectiveness. In recent years, with the advancement of machine learning, automated EEG pathology diagnostics methods have flourished. However, most existing usually neglect crucial spatial correlations in multi-channel signals potential complementary information among different domain...

We report the coexistence of nonvolatile resistive and magnetization switching in Pt/BFO/Nb:SrTiO₃ heterostructures.

Ultra wideband (UWB) technique is attractive in indoor localization due to its high accuracy measurement and robustness obstacle penetrations. However, considerable ranging errors can still be introduced by the presence of obstacles since line sight (LOS) blocked. Many techniques have been proposed address this problem, but most them require too much a priori information, become impractical. In paper, we present non-parametric non-line (NLOS) error mitigation method based on k-nearest...

Network localization is a key feature in many wireless services and applications. In typical range-based non-cooperative techniques, agents try to perform position estimation through ranging with respect anchors known positions. Based on the definition of squared positional error bound, accuracy can be determined by transmit power, carrier frequency, signal bandwidth. This paper analyzes joint power spectrum allocation (JPSA) optimization problems resource restricted systems. We first...

In the intelligent transportation system, traffic forecasting, which is generally characterized as a graph spatial-temporal prediction task, plays crucial role. It challenging to generate reliable forecast results due complexity of topological information and inherent uncertainty road circumstances. Existing works focus on modeling spatial dependency static structures, but ignore dynamic relations between segments cannot extract long-range dependencies in domains. To bridge above gaps, we...

In this paper, we propose a novel UAV aided ground nodes (GNs) localization and communication integrated framework, where the age of information (AoI) is introduced to evaluate system timeliness. We aim jointly optimize trajectory, accuracy, bandwidth beamwidth, guarantee freshness. Specifically, give two-stage method, low complexity initial trajectory searching algorithm firstly proposed, based on <italic xmlns:mml="http://www.w3.org/1998/Math/MathML"...

Without any sample pretreatment, effervescent beverage fluids were manually sprayed into the primary ion plume created by using a nanoelectrospray ionization source for direct ionization, and analyte ions of interest guided an trap mass spectrometer tandem analysis. Functional ingredients (e.g., vitamins, taurine, caffeine, etc.) spiked impurity cocaine) in various beverages, such as Red Bull energy drink, Coco-cola, Pepsi samples rapidly identified within 1.5 s. The limit detection was...