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2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall)最新文献

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Deep Neural Network Based Cell Sleeping Control and Beamforming Optimization in Cloud-RAN 基于深度神经网络的云- ran小区休眠控制与波束形成优化
Pub Date : 2019-09-01 DOI: 10.1109/VTCFall.2019.8891410
Gehui Du, Luhan Wang, Qing Liao, Hao Hu
Cloud Radio Access Network (Cloud-RAN) is a promising network architecture for the next generation (5G) wireless communication. Despite the remarkable benefits on the capacity, the provision of power-efficient wireless resource management solution is still challenging. Cell sleeping control and cooperative beamforming design are considered as two enabling ways to address this issue. In this paper, we propose a novel Deep Neural Network (DNN) based approach to minimize the power consumption of network while satisfying the QoS demand by jointly designing the RRHs sleeping modes and beamforming weights inside a certain cell. The key idea of proposed DNN-based approach is to learn the non-linear mapping from channel coefficients to the optimal beamforming weights and the sleeping modes of multiple RRHs. Compared with the conventional numerical optimization schemes which require extensive iterations and result in considerable computational complexity and limited application in real-time processing, the proposed DNN-based approach enables the real-time cell sleeping control and beamforming optimization. Simulation results show that the DNN- based approach improve the energy efficiency significantly and calculative efficiency about three orders of magnitude.
云无线接入网(Cloud- ran)是下一代(5G)无线通信的一种很有前途的网络架构。尽管在容量方面有显著的优势,但提供节能的无线资源管理解决方案仍然具有挑战性。蜂窝睡眠控制和协同波束形成设计被认为是解决这一问题的两种可行方法。本文提出了一种基于深度神经网络(Deep Neural Network, DNN)的新方法,通过联合设计特定小区内的RRHs睡眠模式和波束形成权值,在满足QoS需求的同时最小化网络功耗。该方法的核心思想是学习信道系数到最优波束形成权重和多个RRHs睡眠模式的非线性映射。传统的数值优化方案需要大量的迭代,计算量大,在实时处理中的应用有限,相比之下,基于dnn的方法能够实现实时的小区睡眠控制和波束形成优化。仿真结果表明,基于深度神经网络的方法将能量效率和计算效率显著提高了3个数量级。
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引用次数: 6
Ensemble-Based Learning in Indoor Localization: A Hybrid Approach 基于集成的室内定位学习:一种混合方法
Pub Date : 2019-09-01 DOI: 10.1109/VTCFall.2019.8891416
Simon Tewes, A. Ahmad, Jaber Kakar, U. M. Thanthrige, Stefan Roth, A. Sezgin
In this paper, we are concerned with indoor localization based on multiple-antenna channel measurements. Indoor localization is an active area of research due to its great importance in many applications. We propose a hybrid algorithm which combines the benefits of two techniques, namely signal processing and machine learning. We validate our algorithm based on real measurements acquired from two practical setups. Our approach shows a very promising performance in the IEEE CTW 2019 - Positioning Algorithm Competition where the algorithm achieves an accuracy within RMSE values below 10 cm. We further build a setup in another indoor environment, where the algorithm still proves a very good performance compared to state-of-the art techniques used in indoor localization tasks.
本文主要研究基于多天线信道测量的室内定位问题。由于其在许多应用中的重要性,室内定位是一个活跃的研究领域。我们提出了一种混合算法,它结合了两种技术的优点,即信号处理和机器学习。我们根据两个实际装置的实际测量结果验证了我们的算法。我们的方法在IEEE CTW 2019 -定位算法竞赛中显示出非常有前景的性能,该算法在RMSE值低于10厘米的范围内实现了精度。我们进一步在另一个室内环境中建立了一个设置,与室内定位任务中使用的最先进技术相比,该算法仍然证明了非常好的性能。
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引用次数: 7
Combining Measurements and Propagation Models for Estimation of Coverage in Wireless Networks 结合测量和传播模型估算无线网络覆盖
Pub Date : 2019-09-01 DOI: 10.1109/VTCFall.2019.8891451
Daniel F. S. Fernandes, Gabriel Soares, Diogo J. A. Clemente, Rodrigo Cortesão, P. Sebastião, F. Cercas, R. Dinis, L. Ferreira
In radio access network planning and optimisation, the estimation and evaluation of cell coverage is crucial. For it, operators use several methodologies, ranging from theoretical propagation models for planning cell coverage, to drive test measurements for evaluating the performance within a cell. A novel propagation model is proposed which combines drive test measurements, cell reach statistics, antenna radiation patterns, terrain morphologies, and classical theoretical propagation models. Considering a realistic scenario of an LTE cell, the use of a classical propagation model such as Walfish- Ikegami results in an average error of -27 dB of estimations with respect to measurements, evidencing a pessimistic estimation of signal. By opposition, the proposed model fits with DT measurements.
在无线接入网的规划和优化中,小区覆盖的估计和评估是至关重要的。为此,运营商使用了几种方法,从规划小区覆盖的理论传播模型,到驱动测试测量以评估小区内的性能。提出了一种结合驱动试验测量、小区到达统计、天线辐射方向图、地形形态和经典理论传播模型的新型传播模型。考虑到LTE蜂窝的实际情况,使用经典传播模型(如Walfish- Ikegami)的结果是相对于测量的估计平均误差为-27 dB,证明了对信号的悲观估计。通过对比,所提出的模型与DT测量相拟合。
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引用次数: 9
Decentralized Control Strategies for Unmanned Aircraft System Pursuit and Evasion 无人机系统追逃分散控制策略
Pub Date : 2019-09-01 DOI: 10.1109/VTCFall.2019.8891277
David W. King, Gilbert L. Peterson
Pursuit and evasion game related tasks are one application area envisioned for future multi- vehicle Unmanned Aircraft systems (UAs). Pursuit and evasion games relate to tasks such as search and rescue operations, surveillance, and search and capture missions. They include two sub-tasks of finding evaders and then capturing them. Because there are two sub-tasks, there are different roles that each pursuer must take on during the game. This paper examines the amount of communication required to determine what role each UAs pursuer should take to achieve a quick location and capture of the evader. Results demonstrate that more robust internal control strategies offset role communication when the communications become limited.
与追逃游戏相关的任务是未来多飞行器无人机系统的一个应用领域。追逐和逃避游戏与搜索和救援行动、监视、搜索和捕获任务等任务有关。它们包括两个子任务:寻找逃逃者,然后抓住他们。因为有两个子任务,所以每个追击者在游戏中必须扮演不同的角色。本文研究了确定每个无人机追踪者应该扮演什么角色以实现快速定位和捕获逃避者所需的通信量。结果表明,当角色沟通变得有限时,更稳健的内部控制策略抵消了角色沟通。
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引用次数: 1
Error Probability of alpha-µ Fading Channels with Imperfect Carrier Phase Recovery 载波相位恢复不完全时α -µ衰落信道的误差概率
Pub Date : 2019-09-01 DOI: 10.1109/VTCFall.2019.8891553
P. E. G. Silva, R. A. Souza, M. Yacoub, D. B. D. Costa, J. M. Moualeu
In this paper, the error performance of binary and quaternary phase-shift keying signals with imperfect carrier phase recovery is investigated assuming a flat slow î±-î fading channel and the presence of thermal noise. The phase noise is considered to be Tikhonov and Gaussian distributed. More specifically, an analytical expression for the exact average bit error rate is obtained, as well as its corresponding asymptotic expression for large signal-to-noise ratio (SNR) values. The derived expressions are valid for arbitrary values of the fading parameters, namely î± and î, and they are validated through Monte Carlo simulations. Several important conclusions concerning the system performance as a function of the channel parameters, namely, non-linearity, clustering, and loop SNR, are drawn.
本文研究了具有不完全载波相位恢复的二相移键控信号和四相移键控信号的误差性能,并假设存在热噪声和平坦缓慢î±-î衰落信道。相位噪声被认为是吉洪诺夫分布和高斯分布。更具体地说,得到了精确平均误码率的解析表达式,以及相应的大信噪比(SNR)值的渐近表达式。导出的表达式对于任意的衰落参数î±和î都是有效的,并通过蒙特卡罗仿真进行了验证。得出了关于系统性能作为通道参数的函数的几个重要结论,即非线性、聚类和环路信噪比。
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引用次数: 3
Deep Reinforcement Learning Framework for Joint Resource Allocation in Heterogeneous Networks 异构网络中联合资源分配的深度强化学习框架
Pub Date : 2019-09-01 DOI: 10.1109/VTCFall.2019.8891448
Yong Zhang, Canping Kang, Yinglei Teng, Sisi Li, Weijun Zheng, Jinghui Fang
In this study, a deep reinforcement learning (DRL) method was employed to solve the joint optimization problem for user association, resource allocation, and power allocation in heterogeneous networks (HetNets), which is an NP-hard problem. Existing studies have taken various optimization objectives into account. The heterogeneous network-deep-Q- network frame-work (HetDQN) is proposed to solve this type of optimization problem in HetNets. Based on maximum spectral efficiency, we designed a 6- layer deep neural network. The state space, objective function, and reward function are presented. In comparison with the existing solution, HetDQN can achieve a higher spectral efficiency. The simulation results revealed that HetDQN has better performance in term of convergence.
本研究采用深度强化学习(DRL)方法解决异构网络(HetNets)中用户关联、资源分配和功率分配的联合优化问题,这是一个NP-hard问题。现有的研究考虑了各种优化目标。为了解决这类优化问题,提出了异构网络-深度q网络框架(HetDQN)。基于最大频谱效率,我们设计了一个6层深度神经网络。给出了状态空间、目标函数和奖励函数。与现有方案相比,HetDQN可以实现更高的频谱效率。仿真结果表明,HetDQN在收敛性方面具有较好的性能。
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引用次数: 6
RoAdNet: A Multi-Resolution Transmission Strategy for Long Range Information Diffusion in VANETs 道路网:面向vanet远程信息扩散的多分辨率传输策略
Pub Date : 2019-09-01 DOI: 10.1109/VTCFall.2019.8891250
Priyashraba Misra, V. Kulathumani
The focus of this paper is on designing a robust information dissemination protocol for Vehicular Ad-Hoc Networks (VANETs) that works across a broad range of application scenarios by dynamically adapting its parameters and transmission strategy to specific information requirements and traffic conditions. Applications of V2V communication can be broadly classified as safety, navigation and environmental efficiency. Safety applications require high frequency and high precision messages at short range (500m) within a single communication hop, navigation applications need low frequency and lower precision information at medium range (1500m/1 mile) and long range aggregate information (10000m/6 miles) can be used for enhancing environmental efficiency and routing. While network protocols for each of these applications have been individually studied, there is scope to study their behavior when they coexist in the network. It is important that the quality of one hop safety messages is not sacrificed when long range communication is introduced. RoAdNet enables long range information dissemination, while maintaining high data.
本文的重点是设计一种鲁棒的车载自组织网络(VANETs)信息传播协议,该协议通过动态调整其参数和传输策略来适应特定的信息需求和交通条件,可以在广泛的应用场景中工作。V2V通信的应用可以大致分为安全、导航和环境效率。安全应用需要在单个通信跳内短距离(500m)内的高频和高精度消息,导航应用需要中距离(1500m/1英里)的低频和较低精度信息,远程聚合信息(10000m/6英里)可用于提高环境效率和路由。虽然已经分别研究了这些应用程序的网络协议,但当它们在网络中共存时,还需要研究它们的行为。引入远程通信时,不能牺牲单跳安全报文的质量,这一点很重要。RoAdNet可以实现远程信息发布,同时保持高数据。
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引用次数: 2
Users Capacity Upper Bound of Multi-Pair Massive MIMO AF Relay System under Pilot Contamination 导频污染下多对大规模MIMO AF中继系统的用户容量上限
Pub Date : 2019-09-01 DOI: 10.1109/VTCFall.2019.8891566
Mohamed Ali Soliman, A. Mehana, M. Nafie
Massive MIMO relay system promises large spectral and energy efficiencies. It also allows admitting more users in the network with controlled quality of service. In this paper, we seek the answer of the following question: what is the maximum number of users that can be admitted in a two-way relay network with massive number of antennas at the relay side and subject to a minimum quality of service at the user side? In order to answer this question, we develop lower bound on the achievable user rate which we then use to bound the maximum number of the admissible users.We also study the effect of the non orthogonality of the pilot sequences on the user capacity in a small cell (dense) network and propose an interference mitigation scheme which improves the spectral efficiency. It is shown that large number of users can coexist using the proposed scheme.
大规模MIMO中继系统保证了高频谱和能源效率。它还允许在控制服务质量的情况下允许更多的用户进入网络。在本文中,我们寻求以下问题的答案:在中继端有大量天线且用户端服务质量最低的双向中继网络中,可以允许的最大用户数量是多少?为了回答这个问题,我们建立了可实现的用户速率的下界,然后我们用它来约束允许的最大用户数量。研究了导频序列的非正交性对小小区(密集)网络中用户容量的影响,并提出了一种提高频谱效率的干扰抑制方案。结果表明,采用该方案可以实现大量用户共存。
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引用次数: 0
On the Trade-Off between Computational Complexity and Collaborative GNSS Hybridization 计算复杂度与协同GNSS杂交的权衡
Pub Date : 2019-09-01 DOI: 10.1109/VTCFall.2019.8891571
Alex Minetto, Gianluca Falco, F. Dovis
In the last decades, several positioning and navigation algorithms have been developed to enhance vehicular localization capabilities. Thanks to ad-hoc communication networks, the exchange of navigation data and positioning solutions has been exploited to the purpose. This trend has recently suggested the extension of state-of-the art navigation algorithms to the hybridization of independent heterogeneous measurements within collaborative frameworks. In this paper an integration paradigm based on the combination of Global Navigation Satellite System (GNSS) observable measurements is analysed. In this work, a comparison among legacy Extended Kalman Filter (EKF) and a suboptimal Particle Filter (s-PF) is proposed. First we show that under the same assumptions in non-collaborative framework the s-PF easily overcome EKF performances at the cost of a higher computational cost. On the contrary, by analysing a realistic scenario in which a target agent is aided by a set of collaborating peers we showed that a hybridized EKF implementation allows reaching and overcome PF performance at the only expense of network connectivity among few GNSS receivers, while the proposed integration induces minor benefits for an efficient s-PF.
在过去的几十年里,已经开发了几种定位和导航算法来增强车辆定位能力。由于有了自组织通信网络,导航数据和定位解决方案的交换得以实现。这一趋势最近建议将最先进的导航算法扩展到协作框架内独立异构测量的杂交。本文分析了一种基于全球卫星导航系统(GNSS)观测值组合的集成模式。在这项工作中,提出了传统的扩展卡尔曼滤波器(EKF)和次优粒子滤波器(s-PF)之间的比较。首先,我们证明了在相同的假设下,在非协作框架下,s-PF以更高的计算成本为代价很容易克服EKF性能。相反,通过分析目标代理由一组协作对等体辅助的现实场景,我们表明,混合EKF实现允许在少数GNSS接收器之间仅牺牲网络连接的情况下达到并克服PF性能,而所提出的集成对有效的s-PF带来的好处较小。
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引用次数: 11
Optimal and Suboptimal Power Allocation for SVD-Precoded Faster-than-Nyquist Signaling svd预编码比奈奎斯特信号更快的最优和次优功率分配
Pub Date : 2019-09-01 DOI: 10.1109/VTCFall.2019.8891129
T. Ishihara, S. Sugiura
This paper proposes a precoded faster-than-Nyquist (FTN) signaling scheme based on singular-value decomposition (SVD) with optimal power allocation. An information-theoretic analysis is conducted on the proposed SVD-precoded FTN signaling architecture. Analytical performance results demonstrate that the proposed optimal scheme outperforms its conventional Nyquist-criterion- based counterpart and the conventional SVD- precoded FTN signaling scheme, which does not use power allocation. In order to overcome the limitations associated with significantly low singular values, suboptimal truncated power allocation is incorporated.
提出了一种基于奇异值分解(SVD)的最优功率分配的FTN预编码快于nyquist信令方案。对提出的svd预编码FTN信令结构进行了信息论分析。分析结果表明,该优化方案优于基于nyquist准则的传统方案和不使用功率分配的SVD预编码FTN信令方案。为了克服奇异值过低的限制,引入了次优截断功率分配。
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引用次数: 1
期刊
2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall)
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