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Future multi-tier communication networks will require enhanced network capacity and reduced overhead. In the absence of Channel State Information (CSI) at the transmitters, Blind Interference Alignment (BIA) and Topological Interference…

信息论 · 计算机科学 2016-02-01 Vaia Kalokidou , Oliver Johnson , Robert Piechocki

The fifth generation (5G) wireless system has a platform-driven approach, aiming to support heterogeneous connections with very diverse requirements. The shared wireless resources should be sliced in a way that each user perceives that its…

We introduce clustered millimeter wave networks with invoking non-orthogonal multiple access~(NOMA) techniques, where the NOMA users are modeled as Poisson cluster processes and each cluster contains a base station (BS) located at the…

信息论 · 计算机科学 2019-01-30 Wenqiang Yi , Yuanwei Liu , Arumugam Nallanathan , Maged Elkashlan

This paper aims to realize a new multiple access technique based on recently proposed millimeter-wave reconfigurable antenna architectures. To this end, first we show that integration of the existing reconfigurable antenna systems with the…

信息论 · 计算机科学 2018-03-28 Mojtaba Ahmadi Almasi , Hani Mehrpouyan , David Matolak , Cunhua Pan , Maged Elkashlan

Non-orthogonal multiple access (NOMA) is an efficient approach that can improve spectrum utilization and support massive connectivity for next-generation wireless networks. However, over a wireless channel, the superimposed NOMA signals are…

信息论 · 计算机科学 2020-10-26 Lu Lv , Hai Jiang , Zhiguo Ding , Qiang Ye , Naofal Al-Dhahir , Jian Chen

Non-orthogonal multiple access (NOMA) allows multiple users to simultaneously access the same time-frequency resource by using superposition coding and successive interference cancellation (SIC). Thus far, most papers on NOMA have focused…

信息论 · 计算机科学 2017-12-12 Lei You , Lei Lei , Di Yuan , Sumei Sun , Symeon Chatzinotas , Björn Ottersten

Millimeter wave (mm-wave) and massive MIMO have been proposed for next generation wireless systems. However, there are many open problems for the implementation of those technologies. In particular, beamforming is necessary in mm-wave…

信息论 · 计算机科学 2015-06-19 Carlos A. Viteri-Mera , Fernando L. Teixeira

Non-orthogonal multiple access (NOMA) is a promising multiple access technology to improve the throughput and spectral efficiency of the users for 5G and beyond cellular networks. Similarly, coordinated multi-point transmission and…

信号处理 · 电气工程与系统科学 2022-01-11 Akhileswar Chowdary , Garima Chopra , Abhinav Kumar , Linga Reddy Cenkeramaddi

Hybrid beamforming (HBF) multi-user multiple-input multiple-output (MU-MIMO) is a key technology for unlocking the directional millimeter-wave (mm-wave) nature for spatial multiplexing beyond current codebook-based 5G-NR networks. In order…

网络与互联网体系结构 · 计算机科学 2024-02-28 Aleksandar Ichkov , Alexander Wietfeld , Marina Petrova , Ljiljana Simić

Multi-antenna non-orthogonal multiple access (NOMA) is a promising technique to significantly improve the spectral efficiency and support massive access, which has received considerable interests from academic and industry. This article…

信息论 · 计算机科学 2018-02-08 Caijun Zhong , Xiaoling Hu , Xiaoming Chen , Derrick Wing Kwan Ng , Zhaoyang Zhang

In this paper, we apply the Non-Orthogonal Multiple Access (NOMA) technique to improve the massive channel access of a wireless IoT network where solar-powered Unmanned Aerial Vehicles (UAVs) relay data from IoT devices to remote servers.…

网络与互联网体系结构 · 计算机科学 2020-09-18 Sami Khairy , Prasanna Balaprakash , Lin X. Cai , Yu Cheng

Orthogonal Frequency Division Multiple Access (OFDMA) as well as other orthogonal multiple access techniques fail to achieve the system capacity limit in the uplink due to the exclusivity in resource allocation. This issue is more prominent…

信息论 · 计算机科学 2017-05-12 Mohammed Al-Imari , Pei Xiao , Muhammad Ali Imran , Rahim Tafazolli

Non-orthogonal multiple access (NOMA) is a key technology to enable massive machine type communications (mMTC) in 5G networks and beyond. In this paper, NOMA is applied to improve the random access efficiency in high-density…

网络与互联网体系结构 · 计算机科学 2024-10-28 Sami Khairy , Prasanna Balaprakash , Lin X. Cai , H. Vincent Poor

Communication at millimeter wave (mmWave) bands is expected to become a key ingredient of next generation (5G) wireless networks. Effective mmWave communications require fast and reliable methods for beamforming at both the User Equipment…

信息论 · 计算机科学 2018-06-19 Xiaoshen Song , Saeid Haghighatshoar , Giuseppe Caire

The new demands for high-reliability and ultra-high capacity wireless communication have led to extensive research into 5G communications. However, the current communication systems, which were designed on the basis of conventional…

信号处理 · 电气工程与系统科学 2019-04-23 Hongji Huang , Song Guo , Guan Gui , Zhen Yang , Jianhua Zhang , Hikmet Sari , Fumiyuki Adachi

In future B5G/6G broadband communication systems, non-linear signal distortion caused by the impairment of transmit power amplifier (PA) can severely degrade the communication performance, especially when uplink users share the wireless…

网络与互联网体系结构 · 计算机科学 2023-08-25 Xiaojia Wang , Suzhi Bi , Xian Li , Xiaohui Lin , Zhi Quan , Ying-Jun Angela Zhang

In this technical note, we present a new theoretical result for resource optimization with non-orthogonal multiple access (NOMA). For multi-cell scenarios, a so-called load-coupling model has been proposed to characterize the presence of…

信息论 · 计算机科学 2020-09-22 Lei You , Di Yuan

This paper considers the coexistence of Ultra Reliable Low Latency Communications (URLLC) and enhanced Mobile BroadBand (eMBB) services in the uplink of Cloud Radio Access Network (C-RAN) architecture based on the relaying of radio signals…

信息论 · 计算机科学 2019-12-24 Andrea Matera , Rahif Kassab , Osvaldo Simeone , Umberto Spagnolini

In this paper, we develop an algorithm for joint handover and beam tracking in millimeter-wave (mmWave) networks. The aim is to provide a reliable connection in terms of the achieved throughput along the trajectory of the mobile user while…

系统与控制 · 电气工程与系统科学 2023-01-16 Sara Khosravi , Hossein S. Ghadikolaei , Jens Zander , Marina Petrova

This paper proposes a quantum algorithm for Dynamic Metasurface Antennas (DMA) beamforming to suppress interference for an amplify-and-forward relay system in multi-base station environments. This algorithm introduces an efficient dynamic…

信号处理 · 电气工程与系统科学 2024-10-22 Taorui Yang , Haifan Yin , Rongguang Song , Lianjie Zhang