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For the K user, single input single output (SISO), frequency selective interference channel, a new low complexity transmit beamforming design that improves the achievable sum rate is presented. Jointly employing the interference alignment…

信息论 · 计算机科学 2015-03-17 Douglas Kim , Murat Torlak

Recently, pinching antennas have attracted significant research interest due to their capability to reconfigure wireless channels as well as their array configuration flexibility. This letter focuses on how these features can be used to…

信息论 · 计算机科学 2025-04-09 Zhiguo Ding

Rate-splitting multiple access (RSMA) has been recognized as a promising and powerful multiple access (MA) scheme, non-orthogonal transmission framework and interference management strategy for 6G. Inspired by the appealing spectral…

信息论 · 计算机科学 2022-03-11 Tianyu Fang , Yijie Mao , Shanpu Shen , Zhencai Zhu , Bruno Clerckx

Continuous efforts have been devoted to integrate millimeter wave (mmWave) and terahertz (THz) bands into future communication standards in order to overcome the bandwidth shortage problem and achieve high data rates, primarily through…

信号处理 · 电气工程与系统科学 2026-03-05 Sung Hyuck Hong , Junil Choi

Reconfigurable intelligent surface (RIS) can effectively control the wavefront of the impinging signals and has emerged as a cost-effective promising solution to improve the spectrum and energy efficiency of wireless systems. Most existing…

信息论 · 计算机科学 2022-06-07 Yiming Liu , Erwu Liu , Rui Wang , Binyu Lu , Zhu Han

In most digital communication systems, bandwidth limited channel along with multipath propagation causes ISI (Inter Symbol Interference) to occur. This phenomenon causes distortion of the given transmitted symbol due to other transmitted…

神经与进化计算 · 计算机科学 2016-04-05 Saba Baloch , Javed Ali Baloch , Mukhtiar Ali Unar

Recent research has focused on reconfigurable intelligent surface (RIS)-assisted cell-free systems with the goal of enhancing coverage and lowering the cost of cell-free networks. However, current research makes the assumption that the…

信号处理 · 电气工程与系统科学 2022-07-29 Songjie Yang , Chenfei Xie , Mingwei Wang , Zhongpei Zhang

The integration of sensing and communication demands architectures that can flexibly exploit spatial and electromagnetic (EM) degrees of freedom (DoF). This paper proposes an Integrated Sensing and Communication (ISAC) MIMO framework that…

信号处理 · 电气工程与系统科学 2025-12-04 Ataher Sams , Yu-Cheng Hsiao , Muhammad Talha , Besma Smida , Ashutosh Sabharwal

This paper investigates the downlink channels in multi-cell multi-user interfering networks. The goal is to propose close-form designs to obtain degrees of freedom (DoF) in high SNR region for the network composed of base stations (BS) as…

信息论 · 计算机科学 2012-11-20 Haichuan Zhou , Tharm Ratnarajah

A combined technique of interference alignment (IA) and interference cancellation (IC), known as interference alignment and cancellation (IAC) scheme, has been proposed to improve the total achievable degrees of freedom (DoFs) over IA.…

信号处理 · 电气工程与系统科学 2019-08-02 Qu Xin , Chung G. Kang

Directional beamforming is a crucial component for realizing robust wireless communication systems using millimeter wave (mmWave) technology. Beam alignment using brute-force search of the space introduces time overhead while location aided…

信号处理 · 电气工程与系统科学 2021-02-23 Vishnu Raj , Nancy Nayak , Sheetal Kalyani

In this paper, we consider a reconfigurable intelligent surface (RIS)-assisted multiple-input multiple-output communication system with multiple antennas at both the base station (BS) and the user. We plan to maximize the achievable rate…

信息论 · 计算机科学 2024-05-28 Yaqiong Zhao , Jindan Xu , Wei Xu , Kezhi Wang , Xinquan Ye , Chau Yuen , Xiaohu You

Interference alignment (IA) is a linear precoding strategy that can achieve optimal capacity scaling at high SNR in interference networks. However, most existing IA designs require full channel state information (CSI) at the transmitters,…

信息论 · 计算机科学 2015-06-19 Xiongbin Rao , Vincent K. N. Lau

Sparse Code Multiple Access (SCMA) and Blind Interference Alignment (BIA) are key enablers for multi-user communication, yet each suffers from distinct limitations: SCMA faces high complexity and limited multiplexing gain, while BIA…

信息论 · 计算机科学 2026-03-05 Jianjian Wu , Chi-Tsun Cheng , Qingfeng Zhou , Jianlin Liang , Jinke Wu

In this paper, we investigate a novel integrated sensing and communication (ISAC) system aided by movable antennas (MAs). A bistatic radar system, in which the base station (BS) is configured with MAs, is integrated into a multi-user…

信号处理 · 电气工程与系统科学 2024-12-31 Wanting Lyu , Songjie Yang , Yue Xiu , Zhongpei Zhang , Chadi Assi , Chau Yuen

Reconfigurable Intelligent Surfaces (RIS) is a transformative technology with great potential in many applications in wireless communications and realizing the Internet of Everything at sixth generation (6G). In this study, we propose a…

信息论 · 计算机科学 2025-06-25 Xuejian Wei , Hui-Ming Wang

This paper addresses the critical sensitivity issue of narrow-beam communication systems to physical misalignments and exploits the potential of Integrated Sensing and Communications (ISAC) technology to propose a sensor-free antenna tilt…

信号处理 · 电气工程与系统科学 2026-05-15 Samed Kesir , Batuhan Kaplan , Emre Arslan , Ahmet Faruk Coskun

Reconfigurable Intelligent Surfaces (RISs) have emerged as a promising technology to enhance wireless communication systems by enabling dynamic control over the propagation environment. However, practical experiments are crucial towards the…

In this paper, we consider a robust lattice alignment design for K-user quasi-static MIMO interference channels with imperfect channel knowledge. With random Gaussian inputs, the conventional interference alignment (IA) method has the…

信息论 · 计算机科学 2015-05-27 Huang Huang , Vincent K. N. Lau , Yinggang Du , Sheng Liu

As a revolutionary wireless transmission strategy, interference alignment (IA) can improve the capacity of the cell-edge users. However, the acquisition of the global channel state information (CSI) for IA leads to unacceptable overhead in…

信息论 · 计算机科学 2017-06-19 Jianpeng Ma , Shun Zhang , Hongyan Li , Nan Zhao , Victor C. M. Leung