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In this paper, we present a novel small-scale fading model, named the extended k-u model, which incorporates the imbalance of multipath clusters by adding a new parameter based on the original k-u model. The extended k-u model has more…

信号处理 · 电气工程与系统科学 2025-10-30 Jiahuan Wu , Xiao-Ping Zhang , Xinchun Yu , Yuhan Dong

Extremely large aperture array (ELAA) is anticipated to serve as a pivotal feature of future multiple-input multiple-output (MIMO) systems in 6G. Near-field (NF) fading channel models are essential for reliable link-level simulation and…

信息论 · 计算机科学 2024-10-28 Jiuyu Liu , Yi Ma , Ahmed Elzanaty , Rahim Tafazolli

In most countries, small (<2 kg) and medium (<25 kg) size unmanned aerial vehicles (UAVs) must fly at low altitude, below 120 m, and with permanent radio communications with ground for control and telemetry. These communications links can…

信号处理 · 电气工程与系统科学 2025-02-26 Cesar Briso , Cesar Calvo , Zhuangzhuang Cui , Lei Zhang , Youyun Xu

We consider transmission over a wireless multiple antenna communication system operating in a Rayleigh flat fading environment with no channel state information at the receiver and the transmitter with coherence time T=1. We show that,…

信息论 · 计算机科学 2008-01-15 Jochen Sommerfeld , Igor Bjelakovic , Holger Boche

Unreliable fading wireless channels are the main challenge for strict performance guarantees in mobile communications. Diversity schemes including massive number of antennas, huge spectrum bands and multi-connectivity links are applied to…

信息论 · 计算机科学 2020-09-21 Karl-Ludwig Besser , Eduard A. Jorswieck

This paper addresses three critical limitations in previous analyses of RIS-aided wireless systems: propagation environments with fixed diversity gain, restricted spatial correlation profiles, and approximation methods that fail to capture…

Over the last years, several works have explored the application of deep learning algorithms to determine the large-scale signal fading (also referred to as ``path loss'') between transmitter and receiver pairs in urban communication…

网络与互联网体系结构 · 计算机科学 2024-10-28 Fabian Jaensch , Giuseppe Caire , Begüm Demir

In recent years, a deep learning framework has been widely used for object pose estimation. While quaternion is a common choice for rotation representation, it cannot represent the ambiguity of the observation. In order to handle the…

计算机视觉与模式识别 · 计算机科学 2024-10-28 Hiroya Sato , Takuya Ikeda , Koichi Nishiwaki

Invertible image representation methods (transforms) are routinely employed as low-level image processing operations based on which feature extraction and recognition algorithms are developed. Most transforms in current use (e.g. Fourier,…

计算机视觉与模式识别 · 计算机科学 2016-01-20 Soheil Kolouri , Se Rim Park , Gustavo K. Rohde

In this paper, we present statistical simulators for cascaded Rayleigh fading channels with and without line-of-sight (LOS). These simulators contain two individual summations and are therefore easy to implement with lower complexity.…

其他计算机科学 · 计算机科学 2012-07-17 Yazan Ibdah , Yanwu Ding

The next generations of wireless networks will work in frequency bands ranging from sub-6 GHz up to 100 GHz. Radio signal propagation differs here in several critical aspects from the behaviour in the microwave frequencies currently used.…

信号处理 · 电气工程与系统科学 2021-03-17 Farasatul Adnan , Valon Blakaj , Sendy Phang , Thomas M. Antonsen , Stephen C. Creagh , Gabriele Gradoni , Gregor Tanner

The growing use of photonic integrated circuits in light detection and ranging (LiDAR) sensors has made the speckle and phase distribution of the reflected light relevant for coupling into the guided modes of these systems. We adopt the use…

光学 · 物理学 2025-01-07 Quentin Baudenon , Ben Hopkins , Cibby Pulikkaseril

Simple yet accurate results for radiative transfer in layered media with discontinuous refractive index are obtained by the method of K-integrals, originally developed for neutron transport analysis. These are certain weighted integrals…

光学 · 物理学 2016-01-05 Adrian C Selden

In this paper, we propose a unified framework to analyze the performance of dense small cell networks (SCNs) in terms of the coverage probability and the area spectral efficiency (ASE). In our analysis, we consider a practical path loss…

网络与互联网体系结构 · 计算机科学 2017-02-17 Bin Yang , Ming Ding , Guoqiang Mao , Xiaohu Ge

A distributed MIMO radar is considered, in which the transmit and receive antennas belong to nodes of a small scale wireless network. The transmit waveforms could be uncorrelated, or correlated in order to achieve a desirable beampattern.…

信息论 · 计算机科学 2009-07-28 Athina P. Petropulu , Yao Yu , H. Vincent Poor

The disorder induced feedback makes random lasers very susceptible to any changes in the scattering medium. The sensitivity of the lasing modes to perturbations in the disordered systems have been utilized to map the regions of…

Multiple scattering of polarised electromagnetic waves in diffusive media is investigated by means of radiative transfer theory. The method becomes exact in several situations of interest, such as a thick-slab experiment (slab thickness L…

凝聚态物理 · 物理学 2009-10-28 E. Amic , J. M. Luck , Th. M. Nieuwenhuizen

The recently introduced independent fluctuating two-ray (IFTR) fading model, consisting of two specular components fluctuating independently plus a diffuse component, has proven to provide an excellent fit to different wireless…

信息论 · 计算机科学 2024-10-28 Maryam Olyaee , Hadi Hashemi , Juan M. Romero-Jerez

A linear scattering problem for which incoming and outgoing waves are restricted to a finite number of radiation channels can be precisely described by a frequency-dependent scattering matrix. The entries of the scattering matrix, as…

光学 · 物理学 2022-06-29 Hongyao Wu , Lijun Yuan , Ya Yan Lu

Intelligent reflecting surface (IRS) is a rapidly emerging paradigm to enable non-line-of-sight (NLoS) wireless transmission. In this paper, we focus on IRS-aided radar estimation performance of a moving hidden or NLoS target. Unlike prior…

信号处理 · 电气工程与系统科学 2022-12-14 Zahra Esmaeilbeig , Kumar Vijay Mishra , Arian Eamaz , Mojtaba Soltanalian