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2017 International Conference on Signals and Systems (ICSigSys)最新文献

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Sonar beam steering using grating lobes 利用光栅瓣的声纳波束控制
Pub Date : 2017-05-01 DOI: 10.1109/ICSIGSYS.2017.7967071
S. Bhatti, K. Brown
This paper explores the possibility of using the relationship between the frequency of the transmit waveform and the location of grating lobes to achieve beam steering. The performance of the proposed beam steering technique is compared with conventional phase steering in terms of hardware requirements, beamwidths and angular coverage.
本文探讨了利用发射波形的频率与光栅瓣位置之间的关系来实现波束导向的可能性。从硬件要求、波束宽度和角覆盖等方面比较了所提波束控制技术与传统相位控制技术的性能。
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引用次数: 0
A multiuser interference mitigation scheme in uplink MC-CDMA with CFO Estimation-MMSE FEQ technique 基于CFO估计- mmse FEQ技术的MC-CDMA上行多用户干扰抑制方案
Pub Date : 2017-05-01 DOI: 10.1109/ICSIGSYS.2017.7967070
Akalily Mardhiyya, R. P. Astuti, N. Adriansyah
In the uplink system, different carrier frequency offsets (CFO) of different users at the receiver resulting multiuser interference (MUI) and thus degrade the performance of Multicarrier Code Division Multiple Access (MC-CDMA) system. In the previous study, Modified Minimum Mean Square Error Frequency Domain Equalization (Modified MMSE-FDE) has been proposed by Agnihotri which results in a better performance than the conventional MMSE. However, the achieved Bit Error Rate (BER) is not smaller than 10−2 for Signal to Noise Ratio (SNR) below 20. This paper proposed a new algorithm to improve Modified MMSE-FDE performance in mitigating multiuser interference (MUI) in single cell MC-CDMA system, that is called as Carrier Frequency Offset Estimation-Minimum Mean Square Error Frequency Domain Equalization (CFO Estimation-MMSE FEQ). CFO Estimation-MMSE FEQ takes into account the rest of MUI as well as Modified MMSE-FDE to design equalization coefficient, but CFO Estimation-MMSE FEQ uses CFO estimation that is not on Modified MMSE-FDE. The value of CFO is estimated and regenerated in the receiver and then used to estimate MUI. In order to get signal processing more efficient, CFO Estimation-MMSE FEQ only takes the real trace of equalization coefficient matrix. MC-CDMA with CFO Estimation-MMSE FEQ has better performance than MC-CDMA with Modified MMSE-FDE. However, the complexity of CFO Estimation-MMSE FEQ is higher than Modified MMSE-FDE. By taking only the real trace of equalization coefficient matrix, the complexity of CFO Estimation-MMSE FEQ is getting simpler than taking the whole of equalization coefficient matrix. Furthermore, CFO Estimation-MMSE FEQ that takes only the real trace of equalization coefficient matrix is 2.9 % more efficient than CFO Estimation-MMSE FEQ that takes the whole of equalization coefficient matrix.
在上行系统中,接收端不同用户的载波频偏(CFO)不同会导致多用户干扰(MUI),从而降低多载波码分多址(MC-CDMA)系统性能。在之前的研究中,Agnihotri提出了修正最小均方误差频域均衡(Modified MMSE- fde),其性能优于传统的MMSE。在信噪比小于20的情况下,实现的误码率(BER)不小于10−2。本文提出了一种新的改进MMSE-FDE算法,即载波频偏估计-最小均方误差频域均衡化(CFO估计- mmse FEQ),以改善单小区MC-CDMA系统中多用户干扰的抑制性能。CFO估计- mmse FEQ考虑了MUI的其余部分以及修改的MMSE-FDE来设计均衡系数,但CFO估计- mmse FEQ使用的CFO估计不是修改的MMSE-FDE。在接收器中估计CFO的值并重新生成,然后用于估计MUI。为了使信号处理更有效,CFO估计- mmse FEQ只取均衡系数矩阵的实迹。采用CFO估计- mmse FEQ的MC-CDMA比采用改进MMSE-FDE的MC-CDMA性能更好。然而,CFO估计- mmse FEQ的复杂性高于改进的MMSE-FDE。通过只取均衡系数矩阵的实迹,CFO估计- mmse FEQ的复杂度比取整个均衡系数矩阵要简单。此外,仅取均衡系数矩阵真实轨迹的CFO估计- mmse FEQ比取整个均衡系数矩阵的CFO估计- mmse FEQ效率高2.9%。
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引用次数: 3
Throughput evaluation of Raspberry Pi devices on multihop and multiflow Wireless Sensor Network scenarios 树莓派设备在多跳和多流无线传感器网络场景下的吞吐量评估
Pub Date : 2017-05-01 DOI: 10.1109/ICSIGSYS.2017.7967052
M. Gragasin, M. P. A. Talplacido, Nemesio A. Macabale
The Raspberry Pi has become one of the most popular devices used in the internet of things studies because of its flexibility and affordability for prototyping purposes. It has found its niche in wireless sensor networks as it can function both as sensor node and router node just by adding wireless adapter. Studies have employed the Raspberry Pi as WSN mesh node and sensor node. These studies looked on the performance of these devices on single flow of data and/or on limited number of hops. Indirectly, they say these devices performs poorly on multihop and multi-flow experimental scenarios. Our experiments show that for multi-hop and multi-flow of scenarios, the raspberry pi nodes actually have enough resource and capacity to maintain good performance. Data flows simply share these resources amongst themselves that results to smaller throughput per flow. We show the appropriateness of Raspberry Pi not only as a sensor node but at the same time act as a mesh node for wireless sensor network studies in different scenarios. To the best of our knowledge, this has not been reported in the literature which should be helpful to other researchers.
树莓派已经成为物联网研究中最受欢迎的设备之一,因为它的灵活性和原型设计的可负担性。它在无线传感器网络中找到了自己的定位,因为它可以同时作为传感器节点和路由器节点,只需添加无线适配器。研究采用树莓派作为WSN的网格节点和传感器节点。这些研究着眼于这些设备在单一数据流和/或有限跳数上的性能。间接地,他们说这些设备在多跳和多流实验场景中表现不佳。我们的实验表明,对于多跳和多流场景,树莓派节点实际上有足够的资源和容量来保持良好的性能。数据流只是在它们之间共享这些资源,从而导致每个流的吞吐量更小。我们展示了树莓派不仅作为传感器节点,而且同时作为不同场景下无线传感器网络研究的网格节点的适用性。据我们所知,这在文献中还没有报道,这应该对其他研究人员有帮助。
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引用次数: 4
Multivariate mutual information of interferometric radar altimeter 干涉雷达高度计的多元互信息
Pub Date : 2017-05-01 DOI: 10.1109/ICSIGSYS.2017.7967072
Youngjoo Kim, H. Bang
This paper presents method and result of analysis on the multivariate mutual information of an interferometric radar altimeter (IRA) for an application to the terrain-referenced navigation (TRN). As an effort to improve the performance of the IRA-based TRN, we have proposed a novel measurement model which utilizes three measurements. This paper addresses the preliminary study to quantify the effect of the IRA measurement on the filtering results by analyzing the amount of information inherent in the IRA measurements. This study gave the information theoretic background of the proposed method. The numerical simulation with synthetic measurements shows that combination of the three measurements have positive interaction information which implies the larger synergy than the redundancy.
本文介绍了用于地形参考导航(TRN)的干涉式雷达高度计(IRA)的多元互信息分析方法和结果。为了提高基于irn的TRN的性能,我们提出了一种利用三种测量方法的新型测量模型。本文通过分析IRA测量中固有的信息量,阐述了量化IRA测量对过滤结果影响的初步研究。本研究为该方法提供了信息理论背景。综合测量的数值模拟表明,三种测量的组合具有正交互信息,这意味着协同大于冗余。
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引用次数: 1
Phased MIMO radar with coherent receive arrays 具有相干接收阵列的相控MIMO雷达
Pub Date : 2017-05-01 DOI: 10.1109/ICSIGSYS.2017.7967073
Syahfrizal Tahcfulloh, G. Hendrantoro
Phased Multiple-Input Multiple-Output (PMIMO) radar which uses overlapped noncoherent transmit subarrays and noncoherent receive arrays provide better performance in transmit-receive gain and SINR than Phased Array and MIMO radar. This paper shows PMIMO approach which uses a coherent receive array provides the same performance as other radars but is more efficient in its use of matched filters and other processing units. The effectiveness of the approach is analyzed by the results of numerical evaluation.
相控多输入多输出(PMIMO)雷达采用非相干发射子阵列和非相干接收阵列重叠的方式,在收发增益和信噪比方面优于相控阵和MIMO雷达。本文介绍了采用相干接收阵列的PMIMO方法,该方法可以提供与其他雷达相同的性能,但在使用匹配滤波器和其他处理单元方面效率更高。通过数值计算结果分析了该方法的有效性。
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引用次数: 8
Practical schemes for throughput improvement in live networks 实时网络吞吐量改进的实用方案
Pub Date : 2017-05-01 DOI: 10.1109/ICSIGSYS.2017.7967048
Mohammad Rasoul Tanhatalab, Seyed Majid Jafari Joor Jadeh, Amirhossein Orouji Esfahani
The increasing demand for data usage drives the efforts for higher throughput in telecom and data networks. Having higher throughput helps users to save time. Evidences from existing operators also demonstrate that when subscribers experience higher throughput, their data usage increases which provides a recurring revenue boost. Operators not only enhance user experience and revenue, they also make the most efficient use of their spectrum and infrastructure investments. In this paper some practical methods for throughput optimization are investigated in live networks with variety of vendors - Ericsson, Nokia, Huawei and ZTE. Since the next networks will be a kind of heterogeneous networks then good performance of each technology can contribute to best performance of overall network and lead to subscriber satisfactory.
不断增长的数据使用需求推动了电信和数据网络中更高吞吐量的努力。具有更高的吞吐量有助于用户节省时间。来自现有运营商的证据也表明,当用户体验到更高的吞吐量时,他们的数据使用量会增加,从而带来经常性的收入增长。运营商不仅可以提高用户体验和收入,还可以最有效地利用其频谱和基础设施投资。本文研究了在爱立信、诺基亚、华为和中兴等不同厂商的实时网络中进行吞吐量优化的一些实用方法。由于未来的网络将是一种异构网络,因此每种技术的良好性能都将有助于实现整个网络的最佳性能,并使用户满意。
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引用次数: 2
Low complexity kernel affine projection-type algorithms with a coherence criterion 具有相干准则的低复杂度核仿射型算法
Pub Date : 2017-05-01 DOI: 10.1109/ICSIGSYS.2017.7967076
F. Albu, K. Nishikawa
In this paper, two new kernel adaptive algorithms are proposed. An approximation is used in order to derive the pseudo kernel affine projection algorithm and the pseudo kernel proportionate affine projection algorithm, respectively. The computational efficiency and performance of the proposed algorithms is verified for a nonlinear system identification application.
本文提出了两种新的核自适应算法。采用近似方法分别推导出伪核仿射投影算法和伪核比例仿射投影算法。通过一个非线性系统辨识应用,验证了所提算法的计算效率和性能。
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引用次数: 3
A model based inference engine for stress estimation 基于模型的应力估计推理引擎
Pub Date : 2017-05-01 DOI: 10.1109/ICSIGSYS.2017.7967047
Midhun P Unni, Srinivasan Jayaraman, B. P.
Stress has become a household term for which ascertaining a meaning has become increasingly difficult these days. Physiologically, stress is observed to act through hypothalamus which modulates the autonomic nervous system mainly via sympathetically mediated effects. Utilizing this theory, a model based inference engine was developed for the estimation of stress. A computational model was used to generate a series of synthetic photo-plethysmogram (PPG) signals by varying the model parameters. Now using these artificial generated PPG signals, the inverse problem of estimating the stress parameter ‘FSN’ was solved by a neural network, using Levenberg-Marquardt algorithm. The inference engine was then tested by using real PPG data collected twice (morning and evening) from a set of 13 subjects. As observed in experimental studies, our inference engine was able to replicate the pattern of stress levels i.e., exhibiting high levels of stress in mornings compared to evenings. These results validate the efficiency of the developed inference engine in estimating the stress
如今,压力已经成为一个家喻户晓的术语,要弄清它的含义变得越来越困难。生理上,应激通过下丘脑起作用,下丘脑主要通过交感神经介导作用调节自主神经系统。利用这一理论,开发了基于模型的应力估计推理引擎。利用一个计算模型,通过改变模型参数产生一系列合成光体积描记(PPG)信号。利用这些人工生成的PPG信号,利用Levenberg-Marquardt算法,通过神经网络求解应力参数FSN的反演问题。然后使用从一组13名受试者中收集的两次(早上和晚上)真实PPG数据对推理引擎进行测试。正如在实验研究中观察到的那样,我们的推理引擎能够复制压力水平的模式,即,与晚上相比,早晨表现出高水平的压力。这些结果验证了所开发的推理引擎在估计应力方面的有效性
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引用次数: 0
Parallel architecture for implementation of frequent itemset mining using FP-growth 使用fp增长实现频繁项集挖掘的并行架构
Pub Date : 2017-05-01 DOI: 10.1109/ICSIGSYS.2017.7967077
Amna Tehreem, S. G. Khawaja, M. Akram, S. Khan, Muhammad G. Ali
Frequent itemset mining is a fundamental step in analysis of big data where correlation among the raw data in deemed necessary. In modern era the amount of data available for processing has grown exponentially, making it a stepper task for mining algorithms to provide solution in a timely manner. The software implementations are normally not efficient in handling such datasets thus focus on parallel architecture seems imminent. In this paper we propose a Multi-Processor based sequentially unfolded architecture for implementation of FP-Growth algorithm. The proposed framework exploits the inherent parallelism available in the FP-Growth algorithm such that N-processing entities (PEs) can work in a collaborative environment. The processing entities work in an independent manner in parallel and largely interchange data at the close of each iteration. The overall architecture is modular which permits scalability of the design with regards to the number of parallel processing entities. The performance of the framework is evaluated using benchmark datasets and their results show a linear increase in the speedup of our proposed framework with increase in PEs.
频繁项集挖掘是大数据分析的一个基本步骤,其中原始数据之间的相关性被认为是必要的。在当今时代,可用于处理的数据量呈指数级增长,使得挖掘算法能够及时提供解决方案成为一项艰巨的任务。软件实现通常在处理此类数据集方面效率不高,因此关注并行架构似乎迫在眉睫。本文提出了一种基于多处理器的顺序展开架构来实现FP-Growth算法。提出的框架利用FP-Growth算法中固有的并行性,使n个处理实体(pe)可以在协作环境中工作。处理实体以独立的方式并行工作,并在每次迭代结束时大量交换数据。整体架构是模块化的,这使得设计可以根据并行处理实体的数量进行扩展。使用基准数据集对框架的性能进行了评估,结果表明,随着pe的增加,我们提出的框架的加速率呈线性增长。
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引用次数: 4
An FPGA implementation of the Goertzel algorithm in a Non-Destructive Eddy current Testing 无损涡流检测中Goertzel算法的FPGA实现
Pub Date : 2017-05-01 DOI: 10.1109/ICSIGSYS.2017.7967036
M. Kekelj, N. Bulić, V. Sucic
The paper presents an implementation of the Goertzel algorithm in FPGA (Field Programmable Gate Array) logic as a proposed algorithm utilized in Eddy current NDT (Non-Destructive Testing) instrumentation equipment. The FPGA running a real-time Goertzel algorithm in Eddy current NDT application is a novel approach different from the usual methods; such are the quadrature demodulation and discrete FFT. The paper provides a brief overview of the Eddy current instrument hardware and gives a mathematical background on Eddy current signals. It also shows a real-time implementation of Goertzel algorithm in SoC (system-on-chip; FPGA/ARM based chip) and provides experimental results obtained by using common EC NDT probes. The results are compared to the results of several commercial Eddy current instruments.
本文提出了一种用于涡流无损检测(NDT)仪器设备的Goertzel算法在FPGA(现场可编程门阵列)逻辑中的实现。FPGA在涡流无损检测中实现实时Goertzel算法是一种不同于常规方法的新方法;这就是正交解调和离散FFT。本文简要介绍了涡流仪的硬件结构,并给出了涡流信号的数学背景。它还展示了Goertzel算法在SoC(片上系统)中的实时实现;基于FPGA/ARM的芯片),并提供了使用普通EC无损检测探头获得的实验结果。结果与几种商用涡流仪的结果进行了比较。
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引用次数: 3
期刊
2017 International Conference on Signals and Systems (ICSigSys)
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