نتایج جستجو برای: non line of sight nlos

تعداد نتایج: 21307905  

Journal: :CoRR 2017
He Huang

The performance of energy detection (ED) for independent and identically distribution (i.i.d.) signal models is analyzed over generalized composite non-linear line-of-sight (LOS) and non-line-ofsight (NLOS) shadowed fading scenarios. The novel expressions for ακ-μ/Gamma and α-η-μ/Gamma fading channels have been derived to approximate by using the mixture gamma (MG) distribution under low instan...

2015
Bing Li Wei Cui Bin Wang

Localization algorithms based on received signal strength indication (RSSI) are widely used in the field of target localization due to its advantages of convenient application and independent from hardware devices. Unfortunately, the RSSI values are susceptible to fluctuate under the influence of non-line-of-sight (NLOS) in indoor space. Existing algorithms often produce unreliable estimated di...

Journal: :IEEE Transactions on Wireless Communications 2023

This study explores the use of non-line-of-sight (NLOS) components in millimeter-wave (mmWave) communication systems for joint localization and environment sensing. The radar cross section (RCS) a reconfigurable intelligent surface (RIS) is calculated to develop general path gain model RISs traditional scatterers. results show that have greater potential assist due their ability maintain high R...

Journal: :IEEE Wireless Communications Letters 2022

Fixed wireless access networks at millimeter wave frequencies enable an alternative to fiber-optic installations for providing high-throughput Internet connectivity. In this letter, we present outdoor channel measurements D-band ranging from 120 GHz 165 GHz, contributing the design of future fixed networks. We measure angular path loss (PL) both Line-of-Sight (LOS) and non-Line-of-Sight (NLOS) ...

Journal: :IEEE Wireless Communications Letters 2021

This letter investigates the uplink outage performance of intelligent reflecting surface (IRS)-assisted non-orthogonal multiple access (NOMA). We consider general case where all users have both direct and reflection links, links undergo Nakagami-m fading. approximate received powers NOMA as Gamma random variables via moments matching. allows for tractable expressions under interference cancella...

Journal: :IEEE Transactions on Vehicular Technology 2023

The increasing complexity of urban environments introduces additional uncertainty to the deployment autonomous vehicular network. A novel road infrastructure cooperative detection model using Joint Communication and Sensing (JCS) technology is proposed in this article simultaneously achieve high-efficient communication obstacle for vehicles. To suppress performance fluctuation caused by shadowi...

2002
Jun-ichi TAKADA Wataru HACHITANI Houtao ZHU

Abstract This paper reports a site-specific spatio-temporal channel model for the suburban slightly NLOS (non-line-of-sight) microcellular environment, based on the field test result of the azimuth-delay spectrum. The parameter extraction scheme of the spatio-temporal channel is briefly reviewed [1, 2], first. Then, the implementation issue of the stochastic spatio-temporal fading simulator is ...

Journal: :Chinese Optics Letters 2023

Non-line-of-sight (NLOS) imaging is an emerging technique for detecting objects behind obstacles or around corners. Recent studies on passive NLOS mainly focus steady-state measurement and reconstruction methods, which show limitations in recognition of moving targets. To the best our knowledge, we propose a novel event-based method. We acquire asynchronous data contains detailed dynamic inform...

2003
B. A. Cetiner J. Y. Qian S. Liu L. Jofre F. De Flaviis

In this paper we introduce a wideband three-element diversity antenna for compact wireless communication systems operating at the 4-6 GHz band. A series of experiments to characterize the diversity performance of the antenna for non-line-of-sight (NLOS) indoor multipath environments have been conducted. From these experiments, we calculate envelope correlation, power imbalance, and diversity ga...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید