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2022 IEEE 8th International Conference on Computer and Communications (ICCC)最新文献

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Fountain Codes with Superposition Feedback 带有叠加反馈的喷泉代码
Pub Date : 2022-12-09 DOI: 10.1109/ICCC56324.2022.10066046
Dai Jia, Junli Jia
In the broadcast scenario, how to use feedback chan-nel is always a hot research topic. If receivers have independent feedback channel, it will waste a lot of frequency or time slot resources. Whereas, if all receivers share the same channel to transmit feedback message, a feedback storm will occur, which causes the transmitter to be unable to confirm which receiver has successfully received the information packet. In order to make use of receivers feedback message, in this paper, we propose a novel fountain codes based on superposition feedback. By analyzing the intensity of received superposition feedback signal, the probability of information packet can be recovered by all receivers is calculated, which can be used to adjust the selection probability of information packets. Simulation results show that the proposed fountain codes in broadcast scenario can significantly reduce the overhead compared to traditional fountain codes.
在广播场景中,如何使用反馈信道一直是一个研究热点。如果接收机有独立的反馈信道,会浪费大量的频率或时隙资源。然而,如果所有接收方共享同一信道发送反馈信息,则会产生反馈风暴,导致发送方无法确认哪个接收方成功接收了信息包。为了充分利用接收者的反馈信息,本文提出了一种新的基于叠加反馈的喷泉码。通过分析接收到的叠加反馈信号的强度,计算出所有接收端都能恢复到信息包的概率,以此来调整信息包的选择概率。仿真结果表明,在广播场景下,与传统的喷泉码相比,所提出的喷泉码可以显著降低开销。
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引用次数: 0
Point Cloud Plane Fitting Based on RANSAC and Robust Eigenvalue Method 基于RANSAC和鲁棒特征值法的点云平面拟合
Pub Date : 2022-12-09 DOI: 10.1109/ICCC56324.2022.10065838
Liaomo Zheng, Ruiduan Wang, Shiyu Wang, Xinjun Liu, Shipei Guo
Aiming at the problem of outliers and errors in the process of point cloud plane fitting, a point cloud plane fitting method combining random sampling consensus algorithm and an improved eigenvalue algorithm is proposed. The random sampling consensus algorithm is used to eliminate outliers, and the improved robust eigenvalue algorithm is used to fit the remaining effective points and calculate the plane parameters. The experimental results show that compared with the traditional eigenvalue method, least squares method and RANSAC algorithm, this method can improve the estimation accuracy of parameters, and is more suitable for fitting point cloud data with different outliers and errors. It is an ideal plane fitting method.
针对点云平面拟合过程中存在的异常值和误差问题,提出了一种结合随机抽样一致性算法和改进特征值算法的点云平面拟合方法。采用随机抽样一致性算法剔除离群点,采用改进的鲁棒特征值算法拟合剩余有效点并计算平面参数。实验结果表明,与传统的特征值法、最小二乘法和RANSAC算法相比,该方法可以提高参数的估计精度,更适合于具有不同离群值和误差的点云数据的拟合。这是一种理想的平面拟合方法。
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引用次数: 1
Statistical Analysis of Radial Velocity and Spectrum Width for Wind Turbines Radar Echo 风力机雷达回波径向速度和频谱宽度的统计分析
Pub Date : 2022-12-09 DOI: 10.1109/ICCC56324.2022.10066021
Yu Shi, Xiaoliang Wang, Weikun He
The number of wind farms has increased rapidly in the past few years. Some studies have shown that wind farms interfere with weather radar and air traffic control surveillance radar. The radar echo signal of fast-rotating wind turbine blades has a wide Doppler spectrum, and the general radar clutter processing methods cannot remove wind turbine clutters with such characteristics, which interferes with the target detection performance of nearby radar equipment seriously. The study of statistical characteristics of the echo signal of wind turbines could provide basis for detection, recognition, elimination of wind turbine clutters. This paper provides statistical models of radial velocity and spectrum width for wind turbines based on Level II data of the WSR-88D weather radar. The orientation of blades' rotation plane has impact on statistical analysis result. In order to solve this problem, we employ the wind direction information to estimate the orientation of blades' rotation plane and we analysis the statistical characteristics in some particular orientation. The real data are utilized to obtain the empirical probability density function and then different probability density functions are used to fit the empirical probability density function. The K-S test and root mean square error are employed to compare the performance of different statistical models. Through the statistical analysis of four different types of wind turbine, the preferable statistical model for radial velocity and spectrum width are obtained.
在过去几年中,风力发电场的数量迅速增加。一些研究表明,风力发电场会干扰气象雷达和空中交通管制监视雷达。快速旋转风电叶片的雷达回波信号具有较宽的多普勒频谱,一般的雷达杂波处理方法无法去除具有这一特性的风电杂波,严重干扰了附近雷达设备的目标探测性能。研究风电机组回波信号的统计特性,可以为风电机组杂波的检测、识别和消除提供依据。本文基于WSR-88D气象雷达二级数据,建立了风力机径向速度和谱宽的统计模型。叶片旋转平面的方向对统计分析结果有影响。为了解决这一问题,我们利用风向信息来估计叶片旋转平面的方向,并分析了在特定方向上的统计特性。利用实际数据得到经验概率密度函数,然后用不同的概率密度函数拟合经验概率密度函数。采用K-S检验和均方根误差比较不同统计模型的性能。通过对四种不同类型风力机的统计分析,得到了较好的径向速度和谱宽统计模型。
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引用次数: 0
Location-Based Scene Reconstruction for Long-Tail Recognition 基于位置的长尾识别场景重建
Pub Date : 2022-12-09 DOI: 10.1109/ICCC56324.2022.10065798
Jiaxin Yang, Xiaofei Li, Weiqi Zhang, T. Hu, Jun Zhang, Shuohao Li
Real-world data often exhibit a long-tailed distribution with severe class imbalance. In such cases, the majority class dominates the deep learning training, which changes the decision boundary of the minority class and reduces the classification accuracy. In this paper, we propose a novel location-based scene reconstruction(LSR) data augmentation method for long-tail recognition. This approach uses a gradient localization method to increase the scenes of tail class samples and enhance the discrimination of the model between head and tail classes, thus the accuracy of long-tail recognition is improved. Experiments on two benchmark datasets show that the LSR method achieves state-of-the-art performance on the long-tail recognition task. More importantly, our method can be easily combined with other classification methods and improves the performance of these traditional classification methods
现实世界的数据往往表现出严重的类不平衡的长尾分布。在这种情况下,多数类主导深度学习训练,改变了少数类的决策边界,降低了分类精度。本文提出了一种基于位置的场景重建(LSR)数据增强方法,用于长尾识别。该方法利用梯度定位方法增加尾类样本的场景,增强模型对头尾类的区分能力,从而提高长尾识别的准确率。在两个基准数据集上的实验表明,LSR方法在长尾识别任务上达到了最先进的性能。更重要的是,我们的方法可以很容易地与其他分类方法相结合,提高了这些传统分类方法的性能
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引用次数: 1
Research on Delay DRL in Energy-Constrained CR-NOMA Networks based on Multi-Threads Markov Reward Process 基于多线程马尔可夫奖励过程的能量约束CR-NOMA网络延迟DRL研究
Pub Date : 2022-12-09 DOI: 10.1109/ICCC56324.2022.10065916
Qiuping Jiang, Chenyu Zhang, Wei Zheng, X. Wen
Applying deep reinforcement learning in wireless networks has been a hot topic in the field of non-orthogonal multiple access. Most present works focus on the design of algorithms and ignore one of the practical problems when deploying them in actual networks: the computing delay, which may lead to performance deterioration. In this paper, we focus on DDPG applied in energy-constrained CR-NOMA networks with delays and propose a multi-threads scheme to assist the main agent to select action in time. We first discuss the workflow of the proposed scheme, and then restore the impaired Markovianity due to the introduction of subthreads by enhancing the state space in MRP. Test results show that the proposed scheme can significantly improve the performance of DDPG in CR-NOMA networks with delays.
在无线网络中应用深度强化学习已成为非正交多址领域的研究热点。目前大多数的工作都集中在算法的设计上,而忽略了在实际网络中部署算法时的一个实际问题:计算延迟,这可能会导致性能下降。本文重点研究了DDPG在能量受限、具有时延的CR-NOMA网络中的应用,提出了一种多线程方案来帮助主agent及时选择动作。我们首先讨论了该方案的工作流程,然后通过增强MRP中的状态空间来恢复由于引入子线程而受损的马尔可夫性。测试结果表明,该方案能显著提高具有时延的CR-NOMA网络中DDPG的性能。
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引用次数: 0
Sorting and Power Allocation-Based THP Precoding Algorithm in VLC System VLC系统中基于排序和功率分配的THP预编码算法
Pub Date : 2022-12-09 DOI: 10.1109/ICCC56324.2022.10065730
Furong Zhu, Liwei Yang, Wencong Lai, Junning Zhang, Xue Liang, Yanling Cai
The pre-coding algorithm is used to reduce channel interference in visible light communication (VLC) system in this paper. After comparing the traditional ZF, MMSE and THP precoding algorithms, it is found that the optimal anti-interference scheme of the system is THP algorithm in 4 x 4 sender and receiver systems. Based on this, the paper proposes an optimized THP algorithm, which alters the row sequence of channel matrix $H$ and controls the emitter power. Simulation results show that the bit error rate (BER) of the system under the power-based THP algorithm is between 10–5 and 10–4, which greatly improves the performance of the system.
在可见光通信(VLC)系统中,采用预编码算法来降低信道干扰。通过比较传统的ZF、MMSE和THP预编码算法,发现在4 × 4发送端和接收端系统中,系统的最优抗干扰方案是THP算法。在此基础上,本文提出了一种优化的THP算法,该算法通过改变信道矩阵H的行序来控制发射极功率。仿真结果表明,基于功率的THP算法下系统的误码率(BER)在10-5 ~ 10-4之间,大大提高了系统的性能。
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引用次数: 0
A 56 Gb/s Half-Rate PAM4 SerDes Receiver with LC-VCO Based CDR in 40-nm CMOS Technology 基于LC-VCO CDR的56 Gb/s半速率PAM4 SerDes接收机
Pub Date : 2022-12-09 DOI: 10.1109/ICCC56324.2022.10065873
Wentian Fan, Yingmei Chen, Qingyi Zhao, Chao Guo, En Zhu, Zhengfei Hu
This paper presents a compact 56 Gb/s 4-level pulse amplitude modulation (PAM4) SerDes receiver, which employs a half rate architecture. By employing a LC voltage control oscillator (LC-VCO) based clock and data recovery (CDR), the jitter of the receiver is greatly reduced, and the complexity and noise of the system are also decreased. The CDR is implemented in a type-II bang-bang phase-locked loop (BBPLL) topology. To reduce the locking time and improve the stability of CDR, all of the PAM4 signal transitions with the central crossover point chosen by a waveform filter are utilized to extract the phase error. The receiver is designed in a 40-nm CMOS technology and supplied with 1.1 V and the core circuit occupy an area of 0.13 mm2. The simulation results show that the proposed PAM4 receiver can work at 56 Gbit/s with 172 mW consumption.
本文提出了一种紧凑的56 Gb/s 4级脉冲幅度调制(PAM4) SerDes接收机,该接收机采用半速率结构。采用基于LC- vco的时钟和数据恢复(CDR)技术,大大降低了接收机的抖动,降低了系统的复杂性和噪声。CDR采用ii型BBPLL (bang-bang锁相环)拓扑结构。为了减少锁定时间和提高CDR的稳定性,利用波形滤波器选择的所有PAM4信号的中心交叉点来提取相位误差。该接收器采用40纳米CMOS技术设计,电压为1.1 V,核心电路面积为0.13 mm2。仿真结果表明,所设计的PAM4接收机工作速率为56 Gbit/s,功耗为172 mW。
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引用次数: 0
Seeing Clear before Visual Tracking 在视觉跟踪之前看到清晰
Pub Date : 2022-12-09 DOI: 10.1109/ICCC56324.2022.10066016
Ximing Zhang, Yuanbo Wang, Hui Zhao, Xuewu Fan
In this paper, we propose a two-stages visual tracking method mainly based on two branches including image deblurring and visual tracking. Our main motivation is to achieve the robust visual tracking when the tracker is suffering fast motion blur. Firstly, we present the hierarchical model based on Spatial Pyramid Matching that performs the fine-to-coarse deblurring and exploits localized-to-coarse operations. After achieving the deblurred images, the proposed method use transformer framework with spatial and channel attention for extracting features in order to obtain the spatial and channel features simultaneously to obtain the fast visual tracking with the balance of accuracy and robustness. We first train the one-stage deblurring network in the dataset of Gopro. Then, we train the second stage visusal tracking branch. Lastly, we conduct extensive ablation studies to demonstrate the effectiveness of the proposed tracker, which obtains currently the outperforming results on large tracking benchmarks, we also validate the effectiveness of our method against the fast motion blurring.
本文提出了一种基于图像去模糊和视觉跟踪两个分支的两阶段视觉跟踪方法。我们的主要动机是在跟踪器遭受快速运动模糊时实现鲁棒的视觉跟踪。首先,我们提出了基于空间金字塔匹配的分层模型,该模型实现了从精细到粗的去模糊,并利用了从局部到粗的操作。在对图像进行去模糊处理后,采用具有空间和通道关注的变换框架进行特征提取,以同时获取空间和通道特征,从而获得精度和鲁棒性兼顾的快速视觉跟踪。我们首先在Gopro的数据集上训练一步去模糊网络。然后,训练第二阶段的视觉跟踪分支。最后,我们进行了广泛的消融研究,以证明所提出的跟踪器的有效性,该跟踪器在大型跟踪基准上获得了目前优异的结果,我们还验证了我们的方法对快速运动模糊的有效性。
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引用次数: 0
Dynamic Routing Algorithm for Maximizing Battery Life in LEO Satellite Networks 低轨道卫星网络中电池寿命最大化的动态路由算法
Pub Date : 2022-12-09 DOI: 10.1109/ICCC56324.2022.10065623
F. Chen, Qianzhu Wang, Yongyi Ran
Battery pack is the core component of the low orbit (LEO) satellite energy storage system. The rapid depletion of satellite node battery energy due to overload in the network and the increase in depth of discharge (DOD) will shorten the battery life cycle and severely reduce the satellite operational life. This paper proposes a dynamic routing algorithm to maximize satellite battery life in LEO satellite networks. By building a multi-objective optimization problem aimed at maximizing the satellite battery life and minimizing the end - to-end delay and packet loss rate. Satellite network routing is considered as a Markov Decision Process (MDP), while combining deep learning with reinforcement learning to learn a routing strategy by utilizing the former's powerful perception capability and the latter's decision making capability to balance the inter-satellite battery usage and reduce the satellite battery cycle life consumption. Simulation results show that the proposed algorithm can avoid over-discharge of satellites throughout the satellite network cycle, effectively extend the satellite lifetime, and ensure low end-to-end delay and packet loss rate.
电池组是低轨道卫星储能系统的核心部件。卫星节点电池能量因网络过载而迅速耗竭,放电深度(DOD)增加,将缩短电池寿命周期,严重降低卫星的使用寿命。针对低轨道卫星网络中卫星电池寿命最大化的问题,提出了一种动态路由算法。通过建立以最大卫星电池寿命、最小端到端时延和丢包率为目标的多目标优化问题。将卫星网络路由视为马尔可夫决策过程(Markov Decision Process, MDP),将深度学习与强化学习相结合,利用深度学习强大的感知能力和强化学习的决策能力来学习路由策略,平衡卫星间电池的使用,降低卫星电池的循环寿命消耗。仿真结果表明,该算法在整个卫星网络周期内避免了卫星的过放电,有效延长了卫星的寿命,保证了较低的端到端时延和丢包率。
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引用次数: 0
Distributed Channel Access in Flying Ad Hoc Network: A Potential Game Perspective 飞行自组织网络中的分布式信道接入:一个潜在的博弈视角
Pub Date : 2022-12-09 DOI: 10.1109/ICCC56324.2022.10065617
Zhaobing Sun, Lifeng Wang, Dianxiong Liu
Large-scale Flying Ad Hoc Network (FANET) is subject to serious interference. There is internal mutual interference and external malicious interference to it. Some existing channel access methods require exchanging information between unmanned aerial vehicles (UAVs), while others consider only one type of interference. In this paper, we study the problem of distributed channel access in the FANET with limited channel resources, where internal co-channel interference and external malicious interference are considered. A non-cooperative game is designed to characterize the interaction between UAVs. We prove that the proposed game is an exact potential game, which guarantees at least one pure strategy Nash equilibrium (NE). We propose a distributed channel access algorithm based on the stochastic learning automata. By independent strategy updates, UAV s can quickly achieve global convergence under different interference scenarios. The simulation results show that the utilities are close to the best NE, demonstrating that the proposed algorithm can effectively avoid interference and fully use the limited channel resources.
大规模飞行自组织网络(FANET)受到严重的干扰。既有内部相互干扰,也有外部恶意干扰。一些现有的信道接入方法需要在无人机之间交换信息,而另一些方法只考虑一种干扰。本文研究了在信道资源有限的情况下,考虑内部同信道干扰和外部恶意干扰的FANET分布式信道接入问题。设计了一种非合作博弈来描述无人机之间的相互作用。我们证明了所提出的博弈是一个精确势博弈,它保证了至少一个纯策略纳什均衡(NE)。提出了一种基于随机学习自动机的分布式信道访问算法。通过自主策略更新,无人机可以在不同干扰场景下快速实现全局收敛。仿真结果表明,该算法能有效地避免干扰,充分利用有限的信道资源。
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引用次数: 0
期刊
2022 IEEE 8th International Conference on Computer and Communications (ICCC)
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