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2022 13th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)最新文献

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Wavelength Reconfigurable Point-to-Multipoint Fiber-Wireless Fronthaul with 10 Gb/s traffic for Network Sharing Applications 波长可重构点对多点光纤无线前传与10gb /s流量的网络共享应用
C. Vagionas, R. Maximidis, G. Kalfas, M. Gatzianas, A. Mesodiakaki, A. Miliou, N. Pleros
A reconfigurable Fiber-Wireless fronthaul that can steer $4 lambda -$WDM IFoF channels with 4x 2.5 Gb/s data traffic of 16-QAM signals to V-band Phased Antennas Array using an AWGR as an all-passive any-to-any wavelength router is experimentally evaluatedpresented towards promoting the coexistence of multiple fronthaul streams of Mobile Network Operators/Tenants operating over a single, shared 5G C-RAN architecture, while simultaneously satisfying for the first time, the 5G Key Performance Indicator (KPI) requirement for a 10 Gb/s aggregate peak-data traffic capacity through FiWi mmWave/IFoF links based on Phased Array Antenna with RF beamsteering.
实验评估了一种可重构的光纤无线前传,该前传可以将$4 lambda -$WDM IFoF信道与4x 2.5 Gb/s 16-QAM信号的数据流量引导到v波段相控天线阵列,使用AWGR作为全无源任意到任意波长路由器,旨在促进在单个共享5G C-RAN架构上运行的移动网络运营商/租户的多个前传流共存,同时首次满足。5G关键性能指标(KPI)要求通过基于射频波束导向的相控阵天线的FiWi毫米波/IFoF链路实现10gb /s的峰值数据流量总量。
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引用次数: 0
Prediphant: Short Term Heavy User Prediction 预见:短期重度用户预测
D. Sanvito, G. Siracusano, Roberto Gonzalez, R. Bifulco
Traffic prediction is of paramount importance for the correct management of network infrastructures. Most research efforts try to forecast the aggregated traffic over the network and over large time windows. In this work, we tackle the problem the other way around. That is, we predict the behaviour of individual users over short time windows. First, we investigate the contribution of the most data eager users to the global network traffic. We do it by analyzing network traces coming from several thousand real users. Then, we design a technique, based on a combination of Natural Language Processing (NLP) and Long Short-Term Memory (LSTM) machine learning models, that leverages past navigation patterns to predict sudden changes in the amount of resources consumed by each user. Finally, we evaluate our method using real data finding it is able to predict about 80% of the users that will rump up their network needs in most realistic scenarios.
流量预测对于网络基础设施的正确管理至关重要。大多数研究都试图预测网络和大时间窗口内的聚合流量。在这项工作中,我们以另一种方式解决问题。也就是说,我们在短时间内预测单个用户的行为。首先,我们研究了最渴望数据的用户对全球网络流量的贡献。我们通过分析来自几千个真实用户的网络痕迹来做到这一点。然后,我们基于自然语言处理(NLP)和长短期记忆(LSTM)机器学习模型的组合设计了一种技术,该技术利用过去的导航模式来预测每个用户消耗的资源量的突然变化。最后,我们使用真实数据评估我们的方法,发现它能够预测在大多数现实场景中大约80%的用户将增加他们的网络需求。
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引用次数: 0
An ultra-short polarization beam splitter based on dual-core photonic crystal fiber with a nematic liquid crystal filled air hole 一种基于双芯光子晶体光纤的向列液晶填充气孔的超短偏振分束器
Yanan Xu, J. Yuan, Yuwei Qu, B. Yan, Kuiru Wang, Qiang Wu
An ultra-short polarization beam splitter based on dual-core photonic crystal fiber with a nematic liquid crystal filled air hole is designed. The designed ultra-short PBS has a splitting length of 65 $mu$m and the maximum extinction ratio of 101.72 dB. In addition, its bandwidth is about 364 nm, which covers the most O+E+S+C+L communication band.
设计了一种基于双芯光子晶体光纤的向列液晶填充空腔的超短偏振分束器。所设计的超短PBS分裂长度为65 $mu$m,最大消光比为101.72 dB。此外,其带宽约为364nm,覆盖了O+E+S+C+L的大部分通信频段。
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引用次数: 0
Experimental Validation of Zero Padding in SEFDM Systems Using Over-the-Air Transmission 无线传输SEFDM系统中零填充的实验验证
Waseem Ozan, R. Grammenos, I. Darwazeh
Non-orthogonal spectrally efficient frequency division multiplexing (SEFDM) saves bandwidth by compressing the frequency spacing between the subcarriers. This is at the cost of introducing inter-carrier interference (ICI) between the subcarriers. This self-created ICI compounded by the signal degradation caused during wireless propagation in multipath environments, complicates the task of channel estimation and equalisation. Recent studies suggest that combining zero padding (ZP) with SEFDM signals can simplify the challenge of channel estimation and equalisation in the frequency-domain. In this work, we validate experimentally the new ZP scheme through over-the-air transmission of radio frequency (RF) signals. Experimental results prove that using ZP in SEFDM enhances the channel estimation and equalisation accuracy, in comparison to conventional cyclic prefix (CP)-SEFDM. In addition, it is shown that ZP-SEFDM offers robustness against timing offsets.
非正交频谱高效频分复用(SEFDM)通过压缩子载波之间的频率间隔来节省带宽。这是以子载波之间引入载波间干扰(ICI)为代价的。这种自创建的ICI加上多径环境下无线传播过程中引起的信号退化,使信道估计和均衡的任务变得复杂。最近的研究表明,将零填充(ZP)与SEFDM信号相结合可以简化频域信道估计和均衡的挑战。在这项工作中,我们通过无线电频率(RF)信号的空中传输实验验证了新的ZP方案。实验结果表明,与传统的循环前缀(CP)-SEFDM相比,在SEFDM中使用ZP提高了信道估计和均衡精度。此外,ZP-SEFDM对时序偏移具有鲁棒性。
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引用次数: 0
Unmanned aerial vehicle positioning and user equipment power allocation 无人机定位与用户设备功率分配
J. Martins, C. H. Antunes, Marco Gomes, V. Silva, R. Dinis
In the near future, unmanned aerial vehicles (UAVs) will have enormous potential applications for next generation wireless communication systems, in which they can collaborate to serve several user equipment (UE) for communication purposes.Disaster scenarios are a relevant research topic, in which UAVs can aid establishing connections in circumstances where base stations (BS) may be inoperative.The resulting UAV positioning affects the overall spectral efficiency (SE) in each UAV-UE link. Moreover, UEs energy consumption must be optimized since the finite amount of energy available is one of the most significant limitations of these devices. Therefore, it is essential to determine the lowest power consumption necessary to guarantee a minimum SE throughput in a disaster location.In this paper, we investigate a cooperative meta-heuristic (MH) optimization algorithm for both the UAVs and UEs. We propose two parallel optimization approaches: one is the UAV search position process to find the best possible location to serve its pre-allocated UEs; the other is finding the lowest possible uplink (UL) power values for each user’s equipment. The preliminary results show that the Differential Evolution (DE) algorithm reaches good quality solutions in acceptable computation runtime.
在不久的将来,无人驾驶飞行器(uav)将在下一代无线通信系统中具有巨大的潜在应用,它们可以协作为多个用户设备(UE)提供通信服务。灾难场景是一个相关的研究课题,其中无人机可以在基站(BS)可能无法运行的情况下帮助建立连接。由此产生的无人机定位影响到每个无人机-终端链路的整体频谱效率(SE)。此外,由于有限的可用能量是这些设备最重要的限制之一,因此必须优化ue的能耗。因此,必须确定最低功耗,以保证灾难位置中的最低SE吞吐量。本文研究了一种针对无人机和ue的协同启发式优化算法。我们提出了两种并行优化方法:一种是无人机搜索位置过程,以找到为其预分配ue服务的最佳可能位置;另一个是为每个用户的设备找到最低可能的上行链路(UL)功率值。初步结果表明,差分进化算法在可接受的计算运行时间内得到了较好的解。
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引用次数: 0
Study on fabrication and sensing characteristics of a D-shaped fiber long-period fiber grating d型长周期光纤光栅的制作及传感特性研究
Hou Li, B. Liu, Juan Liu, Zabih Ghassemlooy, Qiang Wu
A long-period fiber grating (LPFG) structure based on D-shaped fiber is proposed, where a graphene oxide (GO) film layer is deposited on the fiber by the dipping method to jointly construct a new humidity sensor. The D-shaped fiber structure can provide a stronger evanescent field than conventional fibers, and therefore offer much higher sensitivity. The maximum average sensitivity achieved by the sensor in the range of ambient humidity of 20-80% RH (relative humidity) is -0.1908 nm/% RH, and the linearity is 0.998. The experimental results show that the humidity sensor has higher response sensitivity, and improved linear response characteristics. It provides a beneficial exploration for the development of low-cost, easy-to-manufacture, and highly sensitive fiber-optic humidity sensors.
提出了一种基于d型光纤的长周期光纤光栅(LPFG)结构,通过浸渍法在光纤上沉积氧化石墨烯(GO)薄膜层,共同构建一种新型湿度传感器。d型纤维结构可以提供比传统纤维更强的倏逝场,因此提供更高的灵敏度。在环境湿度20 ~ 80% RH(相对湿度)范围内,传感器的最大平均灵敏度为-0.1908 nm/% RH,线性度为0.998。实验结果表明,该湿度传感器具有较高的响应灵敏度和较好的线性响应特性。这为开发低成本、易制造、高灵敏度的光纤湿度传感器提供了有益的探索。
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引用次数: 0
Outage Performance of 6G NOMA Dual-Hop Hybrid RF-PLC System with Imperfect SIC 不完全SIC下6G NOMA双跳混合RF-PLC系统的中断性能
Ahmed Samir, Mohamed Elsayed, A. El-Banna, Taissir Y. Elganimi, Khaled Maaiuf Rabie, B. M. Elhalawany
The combination of power line communications (PLC) and radio frequency (RF) is essential for implementing new applications in smart grid and vehicular communications. In this paper, we propose a non-orthogonal multiple access (NOMA) based dual-hop hybrid wireless-power line communication (PLC) system with a decode-and-forward relay. The wireless channel is characterized by Nakagami-m fading under an additive white Gaussian noise, while the PLC channel is characterized by a Log-normal distribution with Bernoulli Gaussian noise including both background and impulsive noise components. New closedform expressions for the outage probability, and the asymptotic outage probability are derived under the practical assumption of imperfect successive interference cancellation (SIC) and verified via extensive representative simulations. For more insights on the outage performance, we also analyze the diversity order. Additionally, we proposed a power allocation optimization technique to achieve outage-optimal performance. The results show that the system outage probability improves as the arrival probability of the PLC impulsive component decreases. Finally, to highlight the achievable performance gain, the performance of the proposed system is compared against a benchmark OMA-based system.
电力线通信(PLC)和射频(RF)的结合对于实现智能电网和车辆通信中的新应用至关重要。本文提出了一种基于非正交多址(NOMA)的双跳混合无线电力线通信(PLC)系统,该系统具有译码转发中继。无线信道的特征是在加性高斯白噪声下的Nakagami-m衰落,而PLC信道的特征是包含背景和脉冲噪声分量的伯努利高斯噪声的对数正态分布。在不完全连续干扰抵消(SIC)的实际假设下,导出了中断概率和渐近中断概率的新封闭表达式,并通过广泛的代表性仿真进行了验证。为了更深入地了解停机性能,我们还分析了分集顺序。此外,我们还提出了一种功率分配优化技术来实现停机最优性能。结果表明,随着PLC脉冲分量到达概率的减小,系统的停机概率提高。最后,为了突出可实现的性能增益,将提出的系统的性能与基于oma的基准系统进行比较。
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引用次数: 1
Access-Metro Versatile Coherent Dual Optical Network Providing Integrated Services 接入-城域多用途相干双光网络,提供综合服务
J. Segarra, V. Polo, Miquel Masanas, J. Prat
A novel access-metro network architecture based on lightpath flows, using coherent transmissions, supporting numerous passive optical networks (PONs), and integrating multiple services, including 4G/5G/6G mobile networks, is presented. The lightpaths flows are flexibly assigned in an ultra-dense wavelength division multiplexing PON (UDWDM-PON) with dynamic bandwidth allocation. The mobile networks are integrated in a cloud radio access network (C-RAN), which provides reconfigurable capabilities between the remote radio heads (RRHs) near the users’ premises and the baseband units (BBUs) located at a centralized central office (CO) in the metro side. The whole access-metro proposal incorporates the PONs, including the C-RAN services, in a versatile coherent dual optical network (VERSONET) ring architecture; enabling resilience, real-time centralized control, provisioning and also administration and maintenance (OAM) functions.
提出了一种基于光路流的新型城域接入网络架构,该架构采用相干传输,支持多种无源光网络(pon),并集成了包括4G/5G/6G移动网络在内的多种业务。在动态带宽分配的超密集波分复用PON (UDWDM-PON)中,光路流被灵活地分配。移动网络集成在云无线接入网(C-RAN)中,该网络在用户场所附近的远程无线电头(RRHs)和位于城域侧集中中央办公室(CO)的基带单元(BBUs)之间提供可重构能力。整个城域接入方案将pon(包括C-RAN业务)集成到一个通用相干双光网络(VERSONET)环架构中;支持弹性、实时集中控制、供应以及管理和维护(OAM)功能。
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引用次数: 1
MIMO System Based-Constrained Quantum optimization Solution 基于约束量子优化的MIMO系统
Abdulbasit M. A. Sabaawi, Mohammed R. Almasaoodi, Sara El Gaily, S. Imre
The multiple-input multiple-output (MIMO) systems provide high data rates and spectral efficiency performance. However, the fundamental problems with these technologies are their rising computational complexity and power consumption. The aim of this paper is to minimize the total transmit power of the MIMO system subject to the target bit rate of the user. The procedure of assigning different transmit power values to transmiting antennas and selecting the optimum total transmit power with respect to the user’s bit rate constraint is computationally hard, especially when the size of the possible transmit power scenarios arises exponentially. To this end, an efficient quantum strategy called Constrained Quantum optimization Algorithm (CQOA) is proposed in this work, which searches faster (exponentially) for the optimum result. The proposed quantum strategy is compared with the various optimization algorithms such as Genetic Algorithm (GA). Simulation results highlight the fact that the CQOA outperforms the GA in terms of computational complexity.
多输入多输出(MIMO)系统提供高数据速率和频谱效率性能。然而,这些技术的根本问题是它们不断上升的计算复杂性和功耗。本文的目的是使MIMO系统的总发射功率在用户的目标比特率下最小。为发射天线分配不同的发射功率值并根据用户的比特率约束选择最佳的总发射功率的过程在计算上是困难的,特别是当可能的发射功率场景的大小呈指数增长时。为此,本文提出了一种高效的量子策略,即约束量子优化算法(Constrained quantum optimization Algorithm, CQOA),该算法以指数级的速度搜索最优结果。将提出的量子策略与遗传算法(GA)等各种优化算法进行了比较。仿真结果表明,CQOA在计算复杂度方面优于遗传算法。
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引用次数: 4
Alzheimer’s Detection with Speech Using Singular Spectrum Analysis Trend Extraction Method 基于奇异谱分析趋势提取方法的语音阿尔茨海默病检测
G. Liao, B. Ling, C. Y. Ho
With the aging of the population in various countries, the impact of Alzheimer’s disease on humans is becoming more and more obvious. It is very necessary to propose an Alzheimer’s detection system. This paper attempts to use the singular spectrum analysis trend extraction method to complete the task of Alzheimer’s detection with speech. First, the singular spectrum analysis is performed on the speech signal, and the components obtained by the singular spectrum analysis are divided into a trend part and a detrend part according to the energy ratio. Second, feature extraction is performed on the trend part and the detrend part of the speech signal respectively. These features include multidimensional voice program, the gammatone frequency cepstral coefficient, and the Power-normalized cepstral coefficients. Then, use random forest to calculate the importance of feature vectors, and select the top 30 features that random forest considers the most important as the features used in this article. Finally, random forest is used for classification.
随着各国人口的老龄化,阿尔茨海默病对人类的影响越来越明显。提出一种阿尔茨海默病检测系统是非常有必要的。本文尝试使用奇异谱分析趋势提取方法来完成语音检测阿尔茨海默病的任务。首先对语音信号进行奇异谱分析,根据能量比将奇异谱分析得到的分量分为趋势部分和趋势部分。其次,分别对语音信号的趋势部分和趋势部分进行特征提取。这些特征包括多维语音程序、伽玛酮频率倒谱系数和功率归一化倒谱系数。然后,使用随机森林计算特征向量的重要性,并选择随机森林认为最重要的前30个特征作为本文使用的特征。最后,采用随机森林进行分类。
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引用次数: 0
期刊
2022 13th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP)
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