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We consider a two-way half-duplex relaying system where multiple pairs of single antenna users exchange information assisted by a multi-antenna relay. Taking into account the practical constraint of imperfect channel estimation, we study…

信息论 · 计算机科学 2016-07-07 Chuili Kong , Caijun Zhong , Michail Matthaiou , Emil Björnson , Zhaoyang Zhang

This paper investigates performance of a relay assisted hybrid Free Space Optical / Radio Frequency (FSO/RF) communication system. The proposed structure is particularly recommended anywhere that direct RF communication between mobile users…

信号处理 · 电气工程与系统科学 2019-05-22 Mohammad Ali Amirabadi

This paper investigates the secure communication in a two-hop cooperative wireless network, where a buffer-aided relay is utilized to forward data from the source to destination, and a passive eavesdropper attempts to intercept data…

信息论 · 计算机科学 2018-02-20 Ji He , Jia Liu , Yulong Shen , Xiaohong Jiang

This letter considers secrecy simultaneous wireless information and power transfer (SWIPT) in full duplex systems. In such a system, full duplex capable base station (FD-BS) is designed to transmit data to one downlink user and concurrently…

信息论 · 计算机科学 2016-05-25 Ying Wang , Ruijin Sun , Xinshui Wang

The end-to-end learning of Simultaneous Wireless Information and Power Transfer (SWIPT) over a noisy channel is studied. Adopting a nonlinear model for the energy harvester (EH) at the receiver, a joint optimization of the transmitter and…

信息论 · 计算机科学 2018-10-30 Morteza Varasteh , Enrico Piovano , Bruno Clerckx

This letter investigates secure hybrid beamforming (HB) design for an extremely large-scale antenna array-aided simultaneous wireless information and power transfer (SWIPT) system operating in a mixed near-field (NF)/far-field (FF)…

信号处理 · 电气工程与系统科学 2025-09-03 Yaqian Yi , Guangchi Zhang , Miao Cui , Changsheng You , Qingqing Wu

Two-wave with diffuse power (TWDP) is one of the most promising distribution for description of a small-scale fading in the emerging mmWave band. However, traditional error performance analysis in these channels faces two fundamental…

信号处理 · 电气工程与系统科学 2021-09-14 Almir Maric , Pamela Njemcevic

We consider the distributed detection problem of a temporally correlated random radio source signal using a wireless sensor network capable of measuring the energy of the received signals. It is well-known that optimal tests in the…

信号处理 · 电气工程与系统科学 2023-12-20 Juan Augusto Maya , Leonardo Rey Vega , Andrea M. Tonello

Decode-and-forward (DF) cooperative communication based on free space optical (FSO) links is studied in this letter. We analyze performance of the DF protocol in the FSO links following the Gamma-Gamma distribution. The cumulative…

信息论 · 计算机科学 2015-06-05 Manav R. Bhatnagar

In this letter, we present a closed-form approximation of the outage probability for the multi-hop amplify-and-forward (AF) relaying systems with fixed gain in Rayleigh fading channel. The approximation is derived from the outage event for…

性能 · 计算机科学 2008-12-05 Jun Kyoung Lee , Janghoon Yang , Dong Ku Kim

In spectrum-sharing cognitive radio systems, the transmit power of secondary users has to be very low due to the restrictions on the tolerable interference power dictated by primary users. In order to extend the coverage area of secondary…

信息论 · 计算机科学 2013-11-22 Minghua Xia , Sonia Aïssa

The formula for probability density functions (PDFs) has been extended to include PDF for energy dissipation rates in addition to other PDFs such as for velocity fluctuations, velocity derivatives, fluid particle accelerations, energy…

统计力学 · 物理学 2009-11-11 T. Arimitsu , N. Arimitsu

One of the main problems in mobile communication systems is the degradation of Radio Frequency (RF) connection when mobile user is far from base station. One way to solve this problem is to increase the transmitter power, but the mobile…

信号处理 · 电气工程与系统科学 2018-11-21 Mohammad Ali Amirabadi

This paper focuses on providing an analytical framework for the quantification and evaluation of the pointing error for a general case at high-frequency millimeter wave (mmWave) and terahertz (THz) communication links. For this aim, we…

信号处理 · 电气工程与系统科学 2023-01-03 Mohammad Taghi Dabiri , Mazen Hasna , Nizar Zorba , Tamer Khattab , Khalid A. Qaraqe

In this paper a novel multi-hop relay-assisted hybrid FSO / RF system is presented. It is assumed that direct RF connection between mobile users and source Base Station is impossible, therefore a relay connects RF users to the source Base…

信号处理 · 电气工程与系统科学 2018-07-24 Mohammad Ali Amirabadi

In massive MIMO systems, the matched filter (MF) beamforming is attractive technique due to its extremely low complexity of implementation compared to those high-complexity decomposition-based beamforming techniques such as zero-forcing,…

网络与互联网体系结构 · 计算机科学 2014-11-26 Shu Feng , Gu Chen , Wang Mao , Stevan Berber , You Xiaohu

A MIMO secure two-hop wireless communication system is considered in this paper. In this model, there are no direct links between the source-destination and the source-eavesdropper. The problem is maximizing the secrecy capacity of the…

信息论 · 计算机科学 2011-10-18 Ghadamali Bagherikaram , Konstantinos N. Plataniotis

Recently, Tao and Mo proposed an accurate meta-generalized gradient approximation for the exchange-correlation energy. The exchange part is derived from the density matrix expansion, while the correlation part is obtained by improving the…

化学物理 · 物理学 2017-10-11 Yuxiang Mo , Guocai Tian , Jianmin Tao

We present the multi-hop extensions of the recently proposed energy-efficient time synchronization scheme for wireless sensor networks, which is based on the asynchronous source clock frequency recovery and reversed two-way message…

网络与互联网体系结构 · 计算机科学 2017-02-03 Yangyu Wang , Kyeong Soo Kim

In this work, we provide a detailed analysis of a dual-hop fixed gain (FG) amplify-and-forward relaying system, consisting of a hybrid radio frequency (RF) and free-space optical (FSO) channels. We introduce an impairment model which is the…

信号处理 · 电气工程与系统科学 2019-02-12 Elyes Balti , Mohsen Guizani , Bechir Hamdaoui , Bassem Khalfi