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A novel multiuser communication system with movable antennas (MAs) is proposed, where the antenna position optimization is exploited to enhance the downlink sum-rate. The joint optimization of the transmit beamforming vector and transmit MA…

信号处理 · 电气工程与系统科学 2023-09-26 Zhenqiao Cheng , Nanxi Li , Jianchi Zhu , Chongjun Ouyang

Vehicle-to-everything (V2X) is a modern vehicular technology that improves conventional vehicle systems in traffic and communications. V2X communications demand energyefficient and high-reliability networking because of massive vehicular…

信号处理 · 电气工程与系统科学 2020-09-09 Asim Ihsan , Wen Chen , Shunqing Zhang , Shugong Xu

Non-orthogonal multiple access (NOMA) and spectrum sharing (SS) are two emerging multiple access technologies for efficient spectrum utilization in future wireless communications standards. In this paper, we present the performance analysis…

信息论 · 计算机科学 2019-09-25 Vaibhav Kumar , Barry Cardiff , Mark. F. Flanagan

Network slicing is a critical driver for guaranteeing the diverse service level agreements (SLA) in 5G and future networks. Inter-slice radio resource allocation (IS-RRA) in the radio access network (RAN) is very important. However, user…

系统与控制 · 电气工程与系统科学 2022-08-09 Heng Zhang , Guangjin Pan , Shugong Xu , Shunqing Zhang , Zhiyuan Jiang

The increased proliferation of connected devices requires a paradigm shift towards the development of innovative technologies for the next generation of wireless systems. One of the key challenges, however, is the spectrum scarcity, owing…

信号处理 · 电气工程与系统科学 2020-07-28 Shimaa Naser , Lina Bariah , Wael Jaafar , Sami Muhaidat , Paschalis C. Sofotasios , Mahmoud Al-Qutayri , Octavia A. Dobre

Device-to-device (D2D)-assisted mobile edge computing (MEC) is one of the critical technologies of future sixth generation (6G) networks. The core of D2D-assisted MEC is to reduce system latency for network edge UEs by supporting cloud…

信号处理 · 电气工程与系统科学 2024-12-17 Yue Xiu , Yang Zhao , Ran Yang , Huimin Tang , Long Qu , Maurice Khabbaz , Chadi Assi , Ning Wei

With the explosive growth of mobile services, non-orthogonal broadcast/multicast transmissions can effectively improves spectrum efficiency. Nonorthogonal multiple access (NOMA) represents a paradigm shift from conventional orthogonal…

信号处理 · 电气工程与系统科学 2019-01-03 Yong Zhang , Bin Yang , Xiaohu Ge , Yonghui Li

The movable antenna (MA) technology has attracted increasing attention in wireless communications due to its capability for flexibly adjusting the positions of multiple antennas in a local region to reconfigure channel conditions. In this…

信息论 · 计算机科学 2024-08-13 Nianzu Li , Weidong Mei , Boyu Ning , Peiran Wu

In this paper, an LSTM-aided hybrid random access scheme (LSTMH-RA) is proposed to support diverse quality of service (QoS) requirements in 6G machine-type communication (MTC) networks, where massive MTC (mMTC) devices and ultra-reliable…

信号处理 · 电气工程与系统科学 2022-08-01 Wenchao Zhai , Huimei Han , Lei Liu , Jun Zhao

Data aggregation is a promising approach to enable massive machine-type communication (mMTC). This paper focuses on the aggregation phase where a massive number of machine-type devices (MTDs) transmit to aggregators. By using non-orthogonal…

信息论 · 计算机科学 2018-04-25 Onel L. Alcaraz López , Hirley Alves , Pedro Nardelli , Matti Latva-aho

Next-generation internet of things (IoT) applications need trillions of low-powered wireless mobile devices to connect with each other having ultra-reliability and low-latency. Non-orthogonal multiple access (NOMA) is a promising technology…

信号处理 · 电气工程与系统科学 2020-12-16 Kuntal Deka , Sanjeev Sharma

The main limitation of visible light communication (VLC) is the narrow modulation bandwidth, which reduces the achievable data rates. In this paper, we apply the non-orthogonal multiple access (NOMA) scheme to enhance the achievable…

信息论 · 计算机科学 2015-12-01 Hanaa Marshoud , Vasileios M. Kapinas , George K. Karagiannidis , Sami Muhaidat

The spectrum-efficient millimeter-wave (mmWave) communications has recently attracted much attention as a viable solution to spectrum crunch problem. In this work, we propose a novel non-orthogonal multiple access (NOMA) framework, which…

信息论 · 计算机科学 2019-10-02 Yavuz Yapici , Ismail Guvenc , Huaiyu Dai

Positioning accuracy is a critical requirement for vehicle-to-everything (V2X) use cases. Therefore, this paper derives the theoretical limits of estimation for the position and orientation of vehicles in a cooperative vehicle-to-vehicle…

信号处理 · 电气工程与系统科学 2023-06-30 Joo-Hyun Jo , Jae-Nam Shim , Byoungnam , Kim , Chan-Byoung Chae , Dong Ku Kim

This work introduces, for the first time, non-orthogonal multiple access (NOMA) into short-packet communications to achieve low latency in wireless networks. Specifically, we address the optimization of transmission rates and power…

信息论 · 计算机科学 2017-09-20 Xiaofang Sun , Shihao Yan , Nan Yang , Zhiguo Ding , Chao Shen , Zhangdui Zhong

Multiple access (MA) design is investigated for facilitating the coexistence of the emerging semantic transmission and the conventional bit-based transmission in future networks. The semantic rate is considered for measuring the performance…

信息论 · 计算机科学 2024-02-22 Xidong Mu , Yuanwei Liu , Li Guo , Naofal Al-Dhahir

In this paper, we investigate resource allocation algorithm design for multicarrier non-orthogonal multiple access (MC-NOMA) systems employing a full-duplex (FD) base station (BS) for serving multiple half-duplex (HD) downlink (DL) and…

信息论 · 计算机科学 2016-07-12 Yan Sun , Derrick Wing Kwan Ng , Zhiguo Ding , Robert Schober

Federated fine-tuning of large language models (LLMs) over bandwidth-limited 6G links must meet strict round-time and energy budgets. Analog over-the-air (OTA) aggregation reduces uplink cost but is sensitive to fading and interference,…

信号处理 · 电气工程与系统科学 2025-10-28 Yang Zhao , Yue Xiu , Chengxiao Dai , Ning Wei , Dusit Niyato

Movable antenna (MA)-enabled near-field (NF) communications offer significant potential for 6G, yet existing designs often neglect the practical constraints of hybrid beamforming (HBF) for extremely large-scale MIMO (XL-MIMO). Conversely,…

信息论 · 计算机科学 2026-05-11 Xiangqian Xu , Songjie Yang , Arumugam Nallanathan

The increasing demand for massive connectivity and high data rates has made the efficient use of existing spectrum resources an increasingly challenging problem. Non-orthogonal multiple access (NOMA) is a potential solution for future…