Results 91 to 100 of about 24,730 (232)

Eavesdropping risk evaluation for non-line-of-sight terahertz channels by metallic wavy surface in rain [PDF]

Journal of the Optical Society of America B
Non-line-of-sight (NLOS) data transmission through surface reflection is pivotal for enhancing the reach and efficiency of terahertz (THz) communication systems. However, this innovation also introduces significant eavesdropping risks, exacerbated by the
Peian Li, Wenbo Liu, Da Li, Mingxia Zhang, Xiaopeng Wang, Houjun Sun, Jianjun Ma   +6 more
semanticscholar   +1 more source

Effects of Bandwidth on Millimeter Wave Channel Characteristics and Modeling Analysis in Indoor Scenarios

Radio Science, Volume 60, Issue 10, October 2025.
Abstract This paper presents wideband indoor channel measurements in three of the millimeter wave (mmWave) bands for the fifth generation (5G) and beyond 5G (B5G) wireless systems. Measurements were conducted at the Ka‐band (36–41 GHz) and V‐band (50–75 GHz) in office and factory/industrial environments, using Durham University's custom‐designed ...
Amar Al‐jzari, Sana Salous
wiley   +1 more source

Multipath Exploitation-Based Linearized Inverse Scattering Method for Non-Line-of-Sight Indoor Imaging of PEC Objects

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
This article reports on the localization and imaging of perfect electric conductive (PEC) objects in a non-line-of-sight (NLOS) environment using the multipath exploitation-based inverse scattering method.
H. Suenobu, S. Kidera, Takayuki Nakanishi, Ryosuke Kobayashi, Y. Nishioka, Y. Inasawa   +5 more
semanticscholar   +1 more source

Miniaturized time-correlated single-photon counting module for time-of-flight non-line-of-sight imaging applications. [PDF]

Review of Scientific Instruments
Single-photon time-of-flight (TOF) non-line-of-sight (NLOS) imaging enables the high-resolution reconstruction of objects outside the field of view. The compactness of TOF NLOS imaging systems, entailing the miniaturization of key components within such ...
Jie Wu, Chao Yu, Jian-Wei Zeng, Chen Dai, Feihu Xu, Jun Zhang   +5 more
semanticscholar   +1 more source

On the Performance of Downlink Channel Estimation‐Based Cell‐Free Massive MIMO Systems Under Correlated Rician Fading Channels

Engineering Reports, Volume 7, Issue 8, August 2025.
The impact of downlink channel estimation on the achievable spectral efficiency in downlink cell‐free massive MIMO systems is investigated. A generic optimization‐based joint pilot assignment algorithm is proposed to maximize the sum*spectral efficiency. ABSTRACT The prevailing research on cell‐free massive multiple‐input multiple‐output (MIMO) systems
Jiarui Li, Yao Zhang, Fengjiao Gan, Na Liu, Longxiang Yang, Hongbo Zhu   +5 more
wiley   +1 more source

Influence of Target Surface BRDF on Non-Line-of-Sight Imaging. [PDF]

J Imaging
The surface material of an object is a key factor that affects non-line-of-sight (NLOS) imaging. In this paper, we introduce the bidirectional reflectance distribution function (BRDF) into NLOS imaging to study how the target surface material influences ...
Yang Y, Yang K, Zhang A.
europepmc   +2 more sources

Pengaruh Fading Lintasan Jamak Terhadap Performansi High Speed Downlink Packet Access (Hsdpa) [PDF]

, 2013
HSDPA adalah sebuah teknologi komunikasi bergerak yang berteknologi 3,5G (third and half generation) yang termasuk dalam keluarga teknologi High-Speed Packet Acces (HSPA) yang mampu meningkatkan kecepatan transfer data mencapai 14,4 Mbps untuk download ...
Ir. Sigit Kusmaryanto, M.Eng., Aindyta Ayu Pradani., Dr. Ir. Sholeh Hadi pramono, MS
core  

A Rough Surface-Aided Non-Line-of-Sight Joint Sensing and Communication System for THz Band

IEEE Open Journal of the Communications Society
Non-line-of-sight (NLoS) joint sensing and communication (JSAC) are essential in the terahertz (THz) band due to the susceptibility of high frequencies to blockages and severe pathloss, which greatly restrict the range of wireless links.
S. Rafique, Hüseyin Arslan
semanticscholar   +1 more source

A Normalization Model for Analyzing Multi-Tier Millimeter Wave Cellular Networks

, 2018
Based on the distinguishing features of multi-tier millimeter wave (mmWave) networks such as different transmit powers, different directivity gains from directional beamforming alignment and path loss laws for line-of-sight (LOS) and non-line-of-sight ...
Bai, Zhiquan, Han, Tao, Kwak, Kyung Sup, Li, Qiang, Wang, Jiang, Wang, Lijun, Xiong, Siqing   +6 more
core   +1 more source

Improving the Reliability of Long-Range Communication against Interference for Non-Line-of-Sight Conditions in Industrial Internet of Things Applications

Applied Sciences
LoRa technology, renowned for its low-power, long-range capabilities in IoT applications, faces challenges in real-world scenarios, including fading channels, interference, and environmental obstacles.
Boubaker Abdallah, Sabrine Khriji, Rym Chéour, Charbel Lahoud, Klaus Moessner, O. Kanoun   +5 more
semanticscholar   +1 more source