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Two-tier femtocell networks-- comprising a conventional macrocellular network plus embedded femtocell hotspots-- offer an economically viable solution to achieving high cellular user capacity and improved coverage. With universal frequency…

网络与互联网体系结构 · 计算机科学 2009-02-06 Vikram Chandrasekhar , Jeffrey G. Andrews

This paper proposes two interference mitigation strategies that adjust the maximum transmit power of femtocell users to suppress the cross-tier interference at a macrocell base station (BS). The open-loop and the closed-loop control…

网络与互联网体系结构 · 计算机科学 2009-10-13 Han-Shin Jo , Cheol Mun , June Moon , Jong-Gwan Yook

Non-orthogonal multiple access (NOMA) has become a promising technology for next-generation wireless communications systems due to its capability to provide access for multiple users on the same resource. In this paper, we consider an…

信息论 · 计算机科学 2024-07-25 Azadeh Tabeshnezhad , A. Lee Swindlehurst , Tommy Svensson

A simple line network model is proposed to study the downlink cellular network. Without base station cooperation, the system is interference-limited. The interference limitation is overcome when the base stations are allowed to jointly…

信息论 · 计算机科学 2009-09-28 Chris T. K. Ng , Howard Huang

In this paper, we consider maximizing the sum-rate in the uplink of a multi-cell OFDMA network. The problem has a non-convex combinatorial structure and is known to be NP hard. Due to the inherent complexity of implementing the optimal…

最优化与控制 · 数学 2011-09-22 Hina Tabassum , Zaher Dawy , Mohamed Slim Alouini

We demonstrate mitigation of inter-channel nonlinear interference noise (NLIN) in WDM systems for several amplification schemes. Using a practical decision directed recursive least-squares algorithm, we take advantage of the temporal…

光学 · 物理学 2014-05-13 Ronen Dar , Omri Geller , Meir Feder , Antonio Mecozzi , Mark Shtaif

Reconfigurable intelligent surface (RIS) has recently drawn intensive attention due to its potential of simultaneously realizing high spectral and energy efficiency in a sustainable way. This paper focuses on the design of efficient…

信息论 · 计算机科学 2023-03-17 Wei Jiang , Hans D. Schotten

This paper investigates the performance of a two-timescale transmission design for uplink reconfigurable intelligent surface (RIS)-aided cell-free massive multiple-input multiple-output (CF-mMIMO) systems. We consider the Rician channel…

信号处理 · 电气工程与系统科学 2023-08-07 Jianxin Dai , Jin Ge , Kangda Zhi , Cunhua Pan , Zaichen Zhang , Jiangzhou Wang , Xiaohu You

We investigate the performance of a scheduling algorithm where the Mobile Terminals (MTs) may be turned off if they cause a level of interference greater than a given threshold. This approach, which is referred to as Interference Aware…

信息论 · 计算机科学 2024-10-30 F. J. Martin-Vega , M. C. Aguayo-Torres , G. Gomez , M. Di Renzo

Cell-Free massive MIMO networks provide huge power gains and resolve inter-cell interference by coherent processing over a massive number of distributed instead of co-located antennas in access points (APs). Cost-efficient hardware is…

信号处理 · 电气工程与系统科学 2023-05-23 Yibo Wu , Luca Sanguinetti , Ulf Gustavsson , Alexandre Graell i Amat , Henk Wymeersch

New upper bounds on the sum capacity of the two-user Gaussian interference channel are derived. Using these bounds, it is shown that treating interference as noise achieves the sum capacity if the interference levels are below certain…

信息论 · 计算机科学 2008-01-04 V. Sreekanth Annapureddy , Venugopal V. Veeravalli

The objective of this paper is to develop simple techniques to bound the optimal uplink sum-rate of multi-user RIS-aided wireless systems. Specifically, we develop a novel technique called \textit{channel separation} which provides a new…

信息论 · 计算机科学 2021-10-07 Ikram Singh , Peter J. Smith , Pawel A. Dmochowski

In this paper, the performance of uplink spectral efficiency in massive multiple input multiple output (MIMO) over spacially correlated Ricean fading channel is presented. The maximum ratio combining (MRC) receiver is employed at the base…

信息论 · 计算机科学 2017-07-20 Juan Cao , Dongming Wang , Jiamin Li , Qiang Sun

Integrated learning and communication (ILAC) unifies learned transceivers with radio resource management, where semantic feature multiple access (SFMA) enables paired users to superpose their learned representations over shared…

信号处理 · 电气工程与系统科学 2026-04-13 Jiaxiang Wang , Zhouxiang Zhao , Yahao Ding , Zhijin Qin , Zhaohui Yang , Mingzhe Chen , Mohammad Shikh-Bahaei

We consider a practical spatially correlated reconfigurable intelligent surface (RIS)-aided cell-free (CF) massive multiple-input-multiple-output (mMIMO) system with multi-antenna access points (APs) over spatially correlated Rician fading…

信息论 · 计算机科学 2022-09-29 Enyu Shi , Jiayi Zhang , Zhe Wang , Derrick Wing Kwan Ng , Bo Ai

A fundamental aspect in performance engineering of wireless networks is optimizing the set of links that can be concurrently activated to meet given signal-to-interference-and-noise ratio (SINR) thresholds. The solution of this…

信息论 · 计算机科学 2015-03-19 Di Yuan , Vangelis Angelakis , Lei Chen , Eleftherios Karipidis , Erik G. Larsson

In this paper, the ergodic sum-rate of a fading cognitive multiple access channel (C-MAC) is studied, where a secondary network (SN) with multiple secondary users (SUs) transmitting to a secondary base station (SBS) shares the spectrum band…

信息论 · 计算机科学 2014-03-04 Xin Kang , Hon Fah Chong , Yeow-Khiang Chia , Sumei Sun

An interference regime enforcing rate maximization scheme is proposed to maximize the achievable ergodic sum-rate of the parallel Gaussian interference channels by enforcing very strong interference at receivers through power allocation…

信息论 · 计算机科学 2019-01-15 Tugba Erpek , Sennur Ulukus , Yalin E. Sagduyu

This paper investigates the problem of interference among the simultaneous multiuser transmissions in the downlink of multiple antennas systems. Using symbol level precoding, a new approach towards the multiuser interference is discussed…

信息论 · 计算机科学 2015-06-22 Maha Alodeh , Symeon Chatzinotas , Björn Ottersten

Interference widely exists in communication systems and is often not optimally treated at the receivers due to limited knowledge and/or computational burden. Evolutions of receivers have been proposed to balance complexity and spectral…

信息论 · 计算机科学 2025-11-14 Sibo Zhang , Bruno Clerckx