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We study a multiple-input multiple-output (MIMO) multiple access channel (MAC) from several multi-antenna transmitters to a multi-antenna receiver. The fading channels between the transmitters and the receiver are modeled by random…

信息论 · 计算机科学 2011-05-04 Jakob Hoydis , Romain Couillet , Merouane Debbah

The multi-user Holographic Multiple-Input and Multiple-Output Surface (MU-HMIMOS) paradigm, which is capable of realizing large continuous apertures with minimal power consumption, has been recently considered as an energyefficient solution…

In this letter, we investigate the signal-to-interference-plus-noise-ratio (SINR) maximization problem in a multi-user massive multiple-input-multiple-output (massive MIMO) system enabled with multiple reconfigurable intelligent surfaces…

信号处理 · 电气工程与系统科学 2023-04-06 Somayeh Aghashahi , Zolfa Zeinalpour-Yazdi , Aliakbar Tadaion , Mahdi Boloursaz Mashhadi , Ahmed Elzanaty

Hybrid beamforming is key to achieving energy-efficient 5G wireless networks equipped with massive amount of antennas. Low-resolution data converters bring yet another degree of freedom to energy efficiency for the state-of-the-art 5G…

信号处理 · 电气工程与系统科学 2019-09-19 Sung Joon Maeng , Yavuz Yapıcı , Ismail Guvenc , Huaiyu Dai , Arupjyoti Bhuyan

Cellular-connected unmanned aerial vehicles (UAVs) represent a promising technology for extending the coverage of 5G and 6G networks in a cost-effective manner. Additionally, Massive multiple-input multiple-output (MIMO) serves as an…

信号处理 · 电气工程与系统科学 2024-01-01 Byunghyun Lee , Andrew Marcum , David Love , James Krogmeier

The employment of partial zero-forcing (PZF) receivers at the base stations represents an efficient and low-complexity technique for uplink interference management in cellular networks. In this paper, we focus on the performance analysis of…

信息论 · 计算机科学 2016-11-24 Italo Atzeni , Marios Kountouris

With the goal of improving spectral efficiency, complex rotation-based precoding and power allocation schemes are developed for two multiple-input multiple-output (MIMO) communication systems, namely, simultaneous wireless information and…

信息论 · 计算机科学 2021-11-30 Xinliang Zhang , Mojtaba Vaezi

Cell-free massive multiple-input multiple-output (MIMO) employs a large number of distributed access points (APs) to serve a small number of user equipments (UEs) via the same time/frequency resource. Due to the strong macro diversity gain,…

信息论 · 计算机科学 2021-11-23 Jiayi Zhang , Jing Zhang , Derrick Wing Kwan Ng , Shi Jin , Bo Ai

Recently, the reconfigurable intelligent surface (RIS), benefited from the breakthrough on the fabrication of programmable meta-material, has been speculated as one of the key enabling technologies for the future six generation (6G)…

信息论 · 计算机科学 2022-06-23 Chongwen Huang , Ronghong Mo , Chau Yuen

As a key enabling technology for 5G wireless, millimeter wave (mmWave) communication motivates the utilization of large-scale antenna arrays for achieving highly directional beamforming. However, the high cost and power consumption of RF…

信息论 · 计算机科学 2018-07-04 Qingjiang Shi , Mingyi Hong

Controlling the radar beam-pattern by optimizing the transmit covariance matrix is a well-established approach for performance enhancement in multiple-input-multiple-output (MIMO) radars. In this paper, we investigate the joint optimization…

信号处理 · 电气工程与系统科学 2022-08-10 Arindam Bose , Shahin Khobahi , Mojtaba Soltanalian

Movable antenna (MA) technology offers promising potential to enhance wireless communication by allowing flexible antenna movement. To maximize spatial degrees of freedom (DoFs), larger movable regions are required, which may render the…

信息论 · 计算机科学 2024-10-01 Lipeng Zhu , Wenyan Ma , Zhenyu Xiao , Rui Zhang

In this paper, we propose a new transmission scheme, named as Integer Forcing-and-Forward (IFF), for communications among multi-pair multiple-antenna users in which each pair exchanges their messages with the help of a single multi antennas…

信息论 · 计算机科学 2016-11-17 Seyed Mohammad Azimi-Abarghouyi , Masoumeh Nasiri-Kenari , Behrouz Maham

Hybrid analog/digital precoding in millimeter-wave (mmWave) multi-input multi-ouput (MIMO) systems is capable of achieving the near-optimal full-digital performance at reduced hardware cost and power consumption compared to its full-RF…

信息论 · 计算机科学 2020-11-26 Chenghao Feng , Wenqian Shen , Xinyu Gao , Jianping An , Lajos Hanzo

We consider a multi-way massive multiple-input multiple-output relay network with zero-forcing processing at the relay. By taking into account the time-division duplex protocol with channel estimation, we derive an analytical approximation…

信息论 · 计算机科学 2017-01-04 Chung Duc Ho , Hien Quoc Ngo , Michail Matthaiou , Trung Q. Duong

Massive multiple-input multiple-output (mMIMO) has been the core of 5G due to its ability to improve spectral efficiency and spatial multiplexing significantly; however, cell-edge users still experience performance degradation due to…

信号处理 · 电气工程与系统科学 2025-04-07 Ozan Alp Topal , Özlem Tuğfe Demir , Emil Björnson , Cicek Cavdar

Resistive random-access memory (RRAM) provides an excellent platform for analog matrix computing (AMC), enabling both matrix-vector multiplication (MVM) and the solution of matrix equations through open-loop and closed-loop circuit…

信号处理 · 电气工程与系统科学 2025-12-05 Pushen Zuo , Zhong Sun

Using precoding to suppress multi-user interference is a well-known technique to improve spectra efficiency in multiuser multiple-input multiple-output (MU-MIMO) systems, and the pursuit of high performance and low complexity precoding…

信息论 · 计算机科学 2022-07-11 Maojun Zhang , Jiabao Gao , Caijun Zhong

The combination of cell-free massive multiple-input multiple-output (CF-mMIMO) and reconfigurable intelligent surface (RIS) is envisioned as a promising paradigm to improve network capacity and enhance coverage capability. However, to reap…

信息论 · 计算机科学 2022-07-07 Xinying Ma , Deyou Zhang , Ming Xiao , Chongwen Huang , Zhi Chen

This paper investigates the linear precoder design for $K$-user interference channels of multiple-input multiple-output (MIMO) transceivers under finite alphabet inputs. We first obtain general explicit expressions of the achievable rate…

信息论 · 计算机科学 2016-11-18 Yongpeng Wu , Chengshan Xiao , Xiqi Gao , John D. Matyjas , Zhi Ding