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2014 IEEE Global Conference on Signal and Information Processing (GlobalSIP)最新文献

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Stealthy attacks and observable defenses: A game theoretic model under strict resource constraints 隐身攻击与可观察防御:严格资源约束下的博弈论模型
Pub Date : 2014-12-01 DOI: 10.1109/GlobalSIP.2014.7032232
Ming Zhang, Zizhan Zheng, N. Shroff
Stealthy attacks are a major threat to cyber security. In practice, both attackers and defenders have resource constraints that could limit their capabilities. Hence, to develop robust defense strategies, a promising approach is to utilize game theory to understand the fundamental tradeoffs involved. Previous works in this direction, however, mainly focus on the single-node case without considering strict resource constraints. In this paper, a game-theoretic model for protecting a system of multiple nodes against stealthy attacks is proposed. We consider the practical setting where the frequencies of both the attack and the defense are constrained by limited resources, and an asymmetric feedback structure where the attacker can fully observe the states of nodes while largely hiding its actions from the defender. We characterize best strategies for both the defender and the attacker, and study the Nash Equilibria of the game.
隐形攻击是网络安全的主要威胁。在实践中,攻击者和防御者都有可能限制其能力的资源约束。因此,为了制定强有力的防御策略,一个有前途的方法是利用博弈论来理解所涉及的基本权衡。然而,之前在这方面的工作主要集中在单节点情况下,没有考虑严格的资源约束。本文提出了一种保护多节点系统免受隐身攻击的博弈论模型。我们考虑了攻击和防御的频率都受到有限资源限制的实际设置,以及攻击者可以完全观察节点状态的非对称反馈结构,同时在很大程度上对防御者隐藏其行为。我们描述了防守方和进攻方的最佳策略,并研究了博弈的纳什均衡。
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引用次数: 20
Active digital press optimization 主动数字压力机优化
Pub Date : 2014-12-01 DOI: 10.1109/GlobalSIP.2014.7032202
Chung-Hui Kuo
While the traditional printing industry has been experiencing significant challenges from the rapid advancement of telecommunication and display technologies, the increasing demand for short-run and high quality printed material, fulfilled by digital printing technologies, provides future growth opportunity. To minimize the production cost in material and labor, researchers continue to pursue the idea of a Smart Printing Press, which can predict and sense possible failures and automatically recover to optimize the output image quality. In this paper, we will introduce a press-optimization algorithm to deterministically detect and automatically repair the non-uniformity image artifact through modulating the exposure output from its digital image-writing modules. This algorithm has been successfully deployed in the Intelligent Calibration System software package on commercial digital presses of Eastman Kodak Company.
虽然传统印刷业正经历着电信和显示技术快速发展带来的重大挑战,但数字印刷技术满足了对短时间和高质量印刷材料日益增长的需求,为未来的增长提供了机会。为了最大限度地降低材料和劳动力的生产成本,研究人员继续追求智能印刷机的想法,它可以预测和感知可能的故障,并自动恢复以优化输出图像质量。在本文中,我们将介绍一种压力优化算法,通过调制其数字图像写入模块的曝光输出来确定地检测和自动修复非均匀性图像伪影。该算法已成功部署在伊士曼柯达公司商用数字印刷机的智能校准系统软件包中。
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引用次数: 1
Compressed subspace clustering: A case study 压缩子空间聚类:一个案例研究
Pub Date : 2014-12-01 DOI: 10.1109/GlobalSIP.2014.7032158
Xianghui Mao, Yuantao Gu
Subspace clustering possesses a wide range of applications, including network data analysis, image segmentation, and medical image processing, etc. Aimed at reducing the computational complexity of subspace clustering performed on high-dimensional data, we propose a compressed subspace clustering approach by random projection. From the view of subspace principal angles, we analyze the subspace affinity change brought by compression, and provide an estimate of compressed subspace affinity when the embedded subspaces share a certain number of intersected dimensions with all other dimensions orthogonal pairwisely. In such condition, a lower bound on compressed dimensionality is also theoretically proved in this paper. Our results show that the raw data can be compressed to very few measurements yet will remain high subspace separability. Numerical simulations validate the above theoretical results.
子空间聚类具有广泛的应用,包括网络数据分析、图像分割、医学图像处理等。为了降低对高维数据进行子空间聚类的计算复杂度,提出了一种基于随机投影的压缩子空间聚类方法。从子空间主角的角度分析了压缩所带来的子空间亲和度的变化,给出了当嵌入子空间与所有其他维度具有一定数量的正交维相交时压缩子空间亲和度的估计。在这种情况下,本文还从理论上证明了压缩维数的下界。我们的结果表明,原始数据可以被压缩到很少的测量值,但仍将保持高的子空间可分性。数值模拟验证了上述理论结果。
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引用次数: 20
A Naive-Bayes approach to Bolstered error estimation in high-dimensional spaces 高维空间支撑误差估计的朴素贝叶斯方法
Pub Date : 2014-12-01 DOI: 10.1109/GlobalSIP.2014.7032357
Xing Jiang, U. Braga-Neto
Bolstered error estimation has been shown to perform better than cross-validation and competitively with bootstrap in small-sample settings. However, its performance can deteriorate in the high-dimensional settings prevalent in Genomic Signal Processing. We propose here a modification of Bolstered error estimation that is based on the principle of Naive Bayes. Rather than attempting to estimate a single variance parameter for a spherical bolstering kernel in high-dimensional spaces from a small sample, we assume an ellipsoidal kernel and estimate each univariate variance separately along each variable. In simulation results based on a model for gene-expression data and a linear SVM classification rule, the new bolstered estimator clearly outperformed the old one, as well as cross-validation and resubstitution, and was also superior to the 0.632 bootstrap except in the case where a large feature set is selected.
支持误差估计已被证明比交叉验证执行得更好,并且在小样本设置中与bootstrap竞争。然而,在基因组信号处理中普遍存在的高维环境下,其性能会下降。本文提出了一种基于朴素贝叶斯原理的增强误差估计的改进方法。我们不是试图从小样本中估计高维空间中球形支撑核的单一方差参数,而是假设一个椭球核,并沿每个变量分别估计每个单变量方差。在基于基因表达数据模型和线性支持向量机分类规则的仿真结果中,新的增强估计器明显优于旧的增强估计器,以及交叉验证和重新替换,并且除了选择较大的特征集外,也优于0.632 bootstrap。
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引用次数: 8
Energy cooperation for reciprocally-benefited spectrum access in cognitive radio networks 认知无线电网络频谱互惠接入的能源合作
Pub Date : 2014-12-01 DOI: 10.1109/GlobalSIP.2014.7032337
Dawei Wang, Pinyi Ren, Yichen Wang, Qinghe Du, Li Sun
In this paper, we develop an energy cooperation scheme for secondary users' (SU) spectrum access in the hybrid energy supply primary system, which will improve both energy efficiency and spectral efficiency. Specifically, the cooperation is implemented into two stages. In the first stage, the secondary system is allowed to access the licensed for secondary transmission. Simultaneously, the primary system harvests energy from the secondary radio-frequency signals. In the second stage, the primary system employs the energy from the energy harvester and the constant energy source for primary transmission in the remaining slot. Both the primary and secondary systems will benefit from our proposed energy cooperation scheme. The secondary system is allocated to access the spectrum freely and the primary system can harvest energy from SUs' radio-frequency signals. To analyze the throughput performance of both the primary and secondary systems, we derive the closed-form expressions of the outage probability and ergodic capacity for the delay-limited and delay-tolerant transmission modes, respectively. Simulation results verify the analytical results and demonstrate that compared with direct transmission, the performance of the primary system in terms of throughput improves and the secondary system acquires more spectrum opportunities for the secondary transmission.
本文针对混合供电一次系统中二次用户(SU)频谱接入问题,提出了一种能源合作方案,以提高能源效率和频谱效率。具体而言,合作分两个阶段实施。在第一阶段,二级系统被允许接入许可进行二级传输。同时,主系统从次级射频信号中获取能量。在第二阶段,一次系统利用能量采集器的能量和剩余槽的恒定能量源进行一次传输。一次和二次系统都将从我们提出的能源合作计划中受益。二级系统被分配自由访问频谱,一级系统可以从SUs的射频信号中获取能量。为了分析主系统和二次系统的吞吐量性能,我们分别导出了延迟限制传输模式和延迟容忍传输模式下的中断概率和遍历容量的封闭表达式。仿真结果验证了分析结果,表明与直接传输相比,主系统在吞吐量方面的性能有所提高,次系统为二次传输获得了更多的频谱机会。
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引用次数: 12
Energy efficient MAC for cellular-based M2M communications 基于蜂窝的M2M通信的节能MAC
Pub Date : 2014-12-01 DOI: 10.1109/GlobalSIP.2014.7032092
Amin Azari, Guowang Miao
In Machine-to-Machine (M2M) networks, an energy efficient scalable medium access control (MAC) is crucial for serving massive battery-driven machine-type devices. In this paper, we investigate the energy efficient MAC design to minimize battery power consumption in cellular-based M2M communications. We present an energy efficient MAC protocol that not only adapts contention and reservation-based protocols for M2M communications in cellular networks, but also benefits from partial clustering to handle the massive access problem. Then we investigate the energy efficiency and access capacity of contention-based protocols and present an energy efficient contention-based protocol for intra-cluster communication of the proposed MAC, which results in huge power saving. The simulation results show that the proposed MAC protocol outperforms the others in energy saving without sacrificing much delay or throughput. Also, the lifetimes of both individual nodes and the whole M2M network are significantly extended.
在机器对机器(M2M)网络中,高效节能的可扩展介质访问控制(MAC)对于服务大量电池驱动的机器类型设备至关重要。在本文中,我们研究了节能MAC设计,以最大限度地减少基于蜂窝的M2M通信中的电池功耗。我们提出了一种节能的MAC协议,它不仅适应了蜂窝网络中基于争用和预留的M2M通信协议,而且还受益于部分聚类来处理大量访问问题。在此基础上,研究了基于争用协议的能效和访问容量,提出了一种基于争用协议的MAC集群内通信节能方案,节省了大量电能。仿真结果表明,在不牺牲太多延迟和吞吐量的情况下,所提出的MAC协议在节能方面优于其他协议。此外,单个节点和整个M2M网络的生命周期都得到了显著延长。
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引用次数: 33
Joint transmit beamforming and antenna selection for energy efficiency maximization in MISO downlink MISO下行链路能量效率最大化的联合发射波束形成和天线选择
Pub Date : 2014-12-01 DOI: 10.1109/GlobalSIP.2014.7032090
Oskari Tervo, Le-Nam Tran, M. Juntti
We study the joint beamforming and antenna selection problem for energy efficiency maximization in multi-user multiple-input single-output (MISO) downlink channel. By viewing antenna selection as finding a sparse solution, we first introduce a sparsity-inducing regularization term to the design problem. Since the resulting problem is nonconvex, it is difficult to find an optimal solution, and we apply a local optimization method based on the concept of sequential convex approximation (SCA) to solve this problem. By proper reformulations we arrive at a fast converging iterative algorithm, where a convex program is solved at each iteration. In the first design, we simply ignore antennas of which the associated beamformers are nearly zero and select the remaining ones. In the second design, we further perform the search over the selected antennas of the first design to improve the energy efficiency. Numerical results demonstrate remarkable performance gains of the proposed approaches in terms of energy efficiency over the solution without antenna selection.
研究了多用户多输入单输出(MISO)下行信道中联合波束形成和天线选择的能量效率最大化问题。通过将天线选择视为寻找稀疏解,我们首先将稀疏性正则化项引入到设计问题中。由于所得到的问题是非凸的,因此很难找到最优解,我们采用了基于顺序凸逼近(SCA)概念的局部优化方法来解决这一问题。通过适当的重新表述,我们得到了一种快速收敛的迭代算法,其中每次迭代求解一个凸规划。在第一种设计中,我们简单地忽略相关波束成率接近于零的天线,并选择剩余的天线。在第二种设计中,我们进一步对第一种设计的选定天线进行搜索,以提高能源效率。数值结果表明,与不选择天线的解决方案相比,所提出的方法在能量效率方面有显著的性能提高。
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引用次数: 5
Data-driven stochastic scheduling for solar-powered sensor communications 数据驱动的太阳能传感器通信随机调度
Pub Date : 2014-12-01 DOI: 10.1109/GlobalSIP.2014.7032083
Meng-Lin Ku, Yan Chen, K. Liu
This paper presents a data-driven approach of finding optimal scheduling policies for a solar-powered sensor node that attempts to maximize net bit rates by adapting its transmission to the changes of channel fading and battery recharge. The problem is formulated as a discounted Markov decision process (MDP) framework, whereby the energy harvesting process is stochastically quantized into several representative solar states with distinct energy arrivals and is totally driven by historical data records at a sensor node. We evaluate the average net bit rate of the optimal transmission scheduling policy, and computer simulations show that the proposed policy significantly outperforms other schemes with or without the knowledge of short-term energy harvesting and channel fading patterns.
本文提出了一种数据驱动的方法,用于寻找太阳能传感器节点的最佳调度策略,该节点试图通过调整其传输以适应信道衰落和电池充电的变化来最大化净比特率。该问题被表述为贴现马尔可夫决策过程(MDP)框架,其中能量收集过程被随机量化为具有不同能量到达的几个代表性太阳能状态,并且完全由传感器节点的历史数据记录驱动。我们评估了最优传输调度策略的平均净比特率,计算机仿真表明,无论是否考虑短期能量收集和信道衰落模式,所提出的策略都明显优于其他方案。
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引用次数: 2
Cooperative spectrum-aware opportunistic routing in cognitive Radio Ad Hoc Networks 认知无线电自组织网络中的协同频谱感知机会路由
Pub Date : 2014-12-01 DOI: 10.1109/GlobalSIP.2014.7032320
Cuimei Cui, H. Man, Yiming Wang, Shuqi Liu
Cognitive routing coupled with cooperative spectrum sensing in multi-hop Cognitive Radio Ad Hoc Network (CRAHN) is investigated. Recognizing the spectrum dynamics and the problems of hidden terminal and shadow fading in CRAHNs, we propose an opportunistic routing protocol that exploits a Dual-stage Collaborative Spectrum Sensing (DCSS) scheme to improve the accuracy of spectrum available opportunity due to the effects of Primary Users' (PUs) activity. The simulation results indicate that routing access opportunity and breakage probability using the proposed DCSS, when compared to the Single Collaborative Spectrum Sensing (SCSS) scheme and Non-Cooperation Sensing (NCS) scheme, is closer to the practical value of routing establishment. Besides, it is observed that the number of available channels and hop counts also affect the success rate of routing establishment.
研究了多跳认知无线电自组织网络(CRAHN)中认知路由与协同频谱感知的耦合问题。针对crann中存在的频谱动态以及终端隐藏和阴影衰落问题,提出了一种机会路由协议,该协议利用双级协同频谱感知(DCSS)方案来提高受主用户(pu)活动影响的频谱可用机会的准确性。仿真结果表明,与单协同频谱感知(SCSS)方案和非合作频谱感知(NCS)方案相比,采用该方案的路由访问机会和中断概率更接近路由建立的实用价值。此外,可以观察到可用通道数和跳数也会影响路由建立的成功率。
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引用次数: 5
2-D linear predictive compression of complex synthetic aperture radar (SAR) images 复杂合成孔径雷达(SAR)图像的二维线性预测压缩
Pub Date : 2014-12-01 DOI: 10.1109/GlobalSIP.2014.7032134
S. Marple
Current compression of complex SAR imagery uses line-by-line 1-D linear prediction which can cause discontinuities during reconstruction between lines. This paper introduces computationally fast full 2-D linear prediction techniques which can process entire complex SAR images (or sub-images) with another 10X factor improvement in complex data compression over 1-D techniques, while yielding better weak target and shadow area preservation. 2-D linear prediction also compresses linear extent target features not possible with 1-D algorithms.
当前复杂SAR图像的压缩使用逐行1-D线性预测,这可能导致线间重建过程中的不连续。本文介绍了计算快速的全二维线性预测技术,该技术可以处理整个复杂的SAR图像(或子图像),在复杂数据压缩方面比一维技术提高10倍,同时产生更好的弱目标和阴影区域保存。二维线性预测还压缩了一维算法无法实现的线性范围目标特征。
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引用次数: 0
期刊
2014 IEEE Global Conference on Signal and Information Processing (GlobalSIP)
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