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In this paper, we propose a physical-layer rateless code for wireless channels. A novel rateless encoding scheme is developed to overcome the high error floor problem caused by the low-density generator matrix (LDGM)-like encoding scheme in…

信息论 · 计算机科学 2013-06-25 Shuang Tian , Yonghui Li , Mahyar Shirvanimoghaddam , Branka Vucetic

We study communication systems over band-limited Additive White Gaussian Noise (AWGN) channels in which the transmitter output is constrained to be symmetric binary (bi-polar). In this work we improve the original Ozarov-Wyner-Ziv (OWZ)…

信息论 · 计算机科学 2021-10-07 Michael Peleg , Tomer Michaeli , Shlomo Shamai

This letter investigates the optimal antenna spacing for a near-field XL-MIMO communication system from the perspective of the array gain. Specifically, using the Green's function-based channel model, the letter analyzes the channel…

信号处理 · 电气工程与系统科学 2025-01-14 Xianzhe Chen , Hong Ren , Cunhua Pan , Zhangjie Peng , Jiangzhou Wang

An optical translational projector (OTP) designed by transformation optics is applied to improve the energy transfer efficiency in a wireless energy transfer (WET) system. Numerical simulation results show our OTP can greatly enhance the…

综合物理 · 物理学 2017-11-13 Shichao Li , Fei Sun , Di An , Sailing He

One of the main problems in wireless heterogeneous networks is interference between macro- and femto-cells. Using Orthogonal Frequency-Division Multiple Access (OFDMA) to create multiple frequency orthogonal sub-channels, this interference…

信息论 · 计算机科学 2016-11-17 Namzilp Lertwiram , Petar Popovski , Kei Sakaguchi

We consider a wireless communication network with an adaptive scheme to select the number of packets to be admitted and encoded for each transmission, and characterize the information timeliness. For a network of erasure channels and…

信息论 · 计算机科学 2021-03-10 Maice Costa , Yalin Sagduyu , Tugba Erpek , Muriel Médard

Perfect space-time codes were first introduced by Oggier et. al. to be the space-time codes that have full rate, full diversity-gain, non-vanishing determinant for increasing spectral efficiency, uniform average transmitted energy per…

信息论 · 计算机科学 2007-07-13 Petros Elia , B. A. Sethuraman , P. Vijay Kumar

In this paper, a cooperative two-hop communication scheme, together with opportunistic relaying (OR), is applied within a mobile wireless body area network (WBAN). Its effectiveness in interference mitigation is investigated in a scenario…

网络与互联网体系结构 · 计算机科学 2012-12-20 Jie Dong , David Smith

This work proposes to use magnetic material as the substrate of planar antennas to overcome the platform effect caused by the conducting ground plane. The upper bound of the radiation efficiency of an electric-current-driven low-profile…

Orbital angular momentum (OAM) can enhance the spectral efficiency by multiplying a set of orthogonal modes on the same frequency channel. To maintain the orthogonal among different OAM modes, perfect alignments between transmitters and…

信号处理 · 电气工程与系统科学 2025-01-27 Xiaoyan Ma , Yufei Zhao , Haixia Zhang , Yong Liang Guan , Chau Yuen

The standard approach to the design of individual space-time codes is based on optimizing diversity and coding gains. This geometric approach leads to remarkable examples, such as perfect space-time block codes, for which the complexity of…

信息论 · 计算机科学 2015-05-13 Yiyue Wu , Robert Calderbank

Differential spatial modulation (DSM) was recently proposed to overcome the challenge of channel estimation in spatial modulation (SM). In this letter, we propose a gray code order of antenna index permutations for DSM. To facilitate the…

信息论 · 计算机科学 2015-09-10 Jun Li , Miaowen Wen , Yier Yan , Sangseob Song , Moon Ho Lee

Future wireless communication systems must simultaneously address multiple challenges to ensure accurate data detection, deliver high Quality of Service (QoS), adding enable a high data transmission with low system design. Additionally,…

信息论 · 计算机科学 2024-10-03 Amina Darghouthi , Abdelhakim Khlifi , Belgacem Chibani

In this paper, we investigate the problem of transmitting an analog source to a destination over $N$ uses of an additive-white-Gaussian-noise (AWGN) channel, where $N$ is very small (in the order of 10 or even less). The proposed coding…

信息论 · 计算机科学 2024-02-01 Mohammad Ali Maddah-Ali , Soheil Mohajer

This letter investigates the potential of pinching-antenna systems for enhancing physical layer security. By pre-installing multiple pinching antennas at discrete positions along a waveguide, the capability of the considered system to…

信号处理 · 电气工程与系统科学 2025-07-15 Kaidi Wang , Zhiguo Ding , Naofal Al-Dhahir

In this article we research about underwater acoustics transceivers. As Underwater acoustic transceivers consume more power than Radio frequency transceivers. The techniques which are being utilized in radio frequency cannot be implemented…

信号处理 · 电气工程与系统科学 2020-07-03 Waleed Raza , Xuefei Ma , Amir Ali , Zubair Ali Shah , Ghazanfar Mehdi

In this paper, the performance of signaling strategies with high peak-to-average power ratio is analyzed over both coherent and noncoherent fading channels. Two modulation schemes, namely on-off phase-shift keying (OOPSK) and on-off…

信息论 · 计算机科学 2007-12-21 Mustafa Cenk Gursoy

Adaptive modulation and coding (AMC) is widely employed in modern wireless communication systems to improve the transmission efficiency by adjusting the transmission rate according to the channel conditions. Thus, AMC can provide very…

信号处理 · 电气工程与系统科学 2017-12-21 Zhe Yang , Lin Cai , Aaron Gulliver , Liang He , Jianping Pan

This paper addresses network code design for robust transmission of sources over an orthogonal two-hop wireless network with a broadcasting relay. The network consists of multiple sources and destinations in which each destination,…

信息论 · 计算机科学 2016-11-15 Roghayeh Joda , Farshad Lahouti

With the emergence of new applications (e.g., extended reality and haptics), which require to be simultaneously served not just with low latency and sufficient reliability, but also with high spectral efficiency, future networks (i.e., 6G)…

信号处理 · 电气工程与系统科学 2020-03-06 Jehad M. Hamamreh , Abdulwahab Hajar , Mohamedou Abewa