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Beamforming is an effective means to improve the quality of the received signals in multiuser multiple-input-single-output (MISO) systems. Traditionally, finding the optimal beamforming solution relies on iterative algorithms, which…

信息论 · 计算机科学 2020-01-15 Wenchao Xia , Gan Zheng , Yongxu Zhu , Jun Zhang , Jiangzhou Wang , Athina P. Petropulu

In this paper, we study a multi-input multi-output (MIMO) beamforming design in an integrated sensing and communication (ISAC) system, in which an ISAC base station (BS) is used to communicate with multiple downlink users and simultaneously…

信息论 · 计算机科学 2024-07-08 Chao Hu , Yuan Fang , Ling Qiu

In cellular heterogeneous networks (HetNets), a number of distributed base stations cooperatively provide services to multiple mobile users. This paper addresses joint base-station activation and coordinated beamforming design for downlink…

信号处理 · 电气工程与系统科学 2019-02-11 Siguo Bi , Zhaoxi Fang , Xiaojun Yuan , Xin Wang

This paper studies energy-efficient coordinated beamforming in multi-cell multi-user multigroup multicast multiple-input single-output systems. We aim at maximizing the network energy efficiency by taking into account the fact that some of…

信息论 · 计算机科学 2017-07-06 Oskari Tervo , Le-Nam Tran , Harri Pennanen , Symeon Chatzinotas , Markku Juntti , Björn Ottersten

To improve the cellular energy efficiency, without sacrificing quality-of-service (QoS) at the users, the network topology must be densified to enable higher spatial reuse. We analyze a combination of two densification approaches, namely…

信息论 · 计算机科学 2013-10-22 Emil Björnson , Marios Kountouris , Mérouane Debbah

Joint communications and sensing (JCAS) is expected to be a crucial technology for future wireless systems. This paper investigates beamforming design for a multi-user multi-target JCAS system to ensure fairness and balance between…

信号处理 · 电气工程与系统科学 2024-11-27 Mengyuan Ma , Tianyu Fang , Nir Shlezinger , A. L. Swindlehurst , Markku Juntti , Nhan Nguyen

Detecting weak targets is one of the main challenges for integrated sensing and communication (ISAC) systems. Sensing and communication suffer from a performance trade-off in ISAC systems. As the communication demand increases, sensing…

信号处理 · 电气工程与系统科学 2024-11-04 Zongyao Zhao , Zhenyu Liu , Rui Jiang , Zhongyi Li , Xiao-Ping Zhang , Xinke Tang , Yuhan Dong

The long-term average performance of the MISO downlink channel, with a large number of users compared to transmit antennas of the BS, depends on the interference management which necessitates the joint design problem of scheduling and…

信号处理 · 电气工程与系统科学 2019-02-14 Ashok Bandi , Bhavani Shankar Mysore R , Symeon Chatzinotas , Björn Ottersten

This paper considers a cell-free integrated sensing and communication (ISAC) MIMO system, where distributed MIMO access points (APs) jointly serve the communication users and sense the target. For this setup, we derive a sensing SNR for…

信息论 · 计算机科学 2024-02-26 Umut Demirhan , Ahmed Alkhateeb

This paper studies the joint multicast beamforming and user scheduling problem, with the objective of minimizing total transmitting power across multiple channels by jointly assigning each user to appropriate channel and designing multicast…

信息论 · 计算机科学 2018-09-05 L. Zhou , Z. Xu , W. Jiang , W. Luo

This correspondence studies the downlink transmission in a multi-cell system, where multiple base stations (BSs) each with multiple antennas cooperatively design their respective transmit beamforming vectors to optimize the overall system…

信息论 · 计算机科学 2015-05-14 Rui Zhang , Shuguang Cui

One of the main goals of the future wireless networks is improving the users quality of experience (QoE). In this paper, we consider the problem of QoE-based resource allocation in the downlink of a massive multiple-input multiple-output…

信息论 · 计算机科学 2018-05-18 Hadis Abarghouyi , S. Mohammad Razavizadeh , Emil Bjornson

This paper deals with the problem of admission control/channel access in power-controlled decentralized wireless networks, in which the quality-of-service (QoS) is expressed in terms of the signal-to-interference ratio (SIR). We analyze a…

信息论 · 计算机科学 2010-01-06 Sławomir Stańczak , Michał Kaliszan , Nicholas Bambos

In this paper, we study power allocation for secure communication in a multiuser multiple-input single-output (MISO) downlink system with simultaneous wireless information and power transfer. The receivers are able to harvest energy from…

信息论 · 计算机科学 2013-07-30 Derrick Wing Kwan Ng , Lin Xiang , Robert Schober

In this paper, we investigate the combination of two key enabling technologies for the fifth generation (5G) wireless mobile communication, namely millimeter-wave (mmWave) communications and non-orthogonal multiple access (NOMA). In…

信息论 · 计算机科学 2017-11-17 Lipeng Zhu , Jun Zhang , Zhenyu Xiao , Xianbin Cao , Dapeng Oliver Wu , Xiang-Gen Xia

Cell-free Massive MIMO (multiple-input multiple-output) refers to a distributed Massive MIMO system where all the access points (APs) cooperate to coherently serve all the user equipments (UEs), suppress inter-cell interference and mitigate…

信息论 · 计算机科学 2019-09-09 Giovanni Interdonato , Hien Quoc Ngo , Pål Frenger , Erik G. Larsson

We address the problem of uplink co-operative reception with constraints on both backhaul bandwidth and the receiver aperture, or number of antenna signals that can be processed. The problem is cast as a network utility (weighted sum rate)…

系统与控制 · 计算机科学 2016-11-17 Shirish Nagaraj , Michael L. Honig , Khalid Zeineddine

In cellular wireless networks, user association refers to the problem of assigning mobile users to base station cells -- a critical, but challenging, problem in many emerging small cell and heterogeneous networks. This paper considers a…

网络与互联网体系结构 · 计算机科学 2013-04-16 Changkyu Kim , Russell Ford , Yanjia Qi , Sundeep Rangan

This paper proposes energy-efficient coordinated beamforming strategies for multi-cell multi-user multiple-input single-output system. We consider a practical power consumption model, where part of the consumed power depends on the base…

信息论 · 计算机科学 2017-10-03 Oskari Tervo , Antti Tölli , Markku Juntti , Le-Nam Tran

This paper studies the coordinated beamforming design problem for the multiple-input single-output (MISO) interference channel, assuming only channel distribution information (CDI) at the transmitters. Under a given requirement on the rate…

信息论 · 计算机科学 2016-11-18 Wei-Chiang Li , Tsung-Hui Chang , Che Lin , Chong-Yung Chi