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2016 8th IEEE International Conference on Communication Software and Networks (ICCSN)最新文献

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WiFi based indoor localization with multiple kernel learning 基于WiFi的多核学习室内定位
Heng Fan, Zhongmin Chen
To solve the problem of low accuracy in real-time localization in indoor environment, we propose a novel localization algorithm with Multiple Kernel Learning (MKL). In our work, the indoor localization is viewed as multiple classification. First we select some reference nodes in the indoor area, and measure the WiFi signal strength of reference nodes for multiple times to construct the classifiers based on multiple kernel learning. When the object enters into the location area, we measure its WiFi signal strength and input it into classifiers to discriminate its label. According to the classification result, the location of the object can be estimated. Experimental results demonstrate that our algorithm is able to effectively locate the object in indoor environment.
为解决室内环境下实时定位精度低的问题,提出了一种基于多核学习(MKL)的定位算法。在我们的工作中,室内定位被视为多重分类。首先在室内选取一些参考节点,对参考节点的WiFi信号强度进行多次测量,构建基于多核学习的分类器。当物体进入定位区域时,我们测量其WiFi信号强度,并将其输入到分类器中进行标签识别。根据分类结果,可以估计出目标的位置。实验结果表明,该算法能够有效地定位室内环境中的目标。
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引用次数: 8
Parallel bit manipulation processor for communication coding and decoding 用于通信编码和解码的并行位操作处理器
Yuanhong Huo, Dake Liu
VLSI (Very Large-Scale Integration) designs for communication coding and decoding should, in general, provide high throughput, achieve low computing latency, occupy low silicon cost, and handle multiple bit manipulation algorithms. Application-Specific Instruction-set Processor (ASIP) is an optimized solution to fulfill all these requirements. This paper presents an ASIP for Cyclic Redundancy Check, Reed-Solomon, and basic bit manipulation operations. The processor is obtained via hardware/software co-design methodology and adopts single instruction multiple data architecture. The proposed design occupies 0.71mm2 (190 kgates) in 65nm CMOS process including 34.5KB single port memory and 45 kgates logic. The throughput of the proposed design reaches 128Gb/s, 8Gb/s, and 128Gb/s for basic bit manipulation operations, RS (255,239) decoding, and CRC calculation, respectively under the clock frequency of 1.0GHz. The proposed design is evaluated with state-of-the-art VLSI designs, which reveals its high performance, low silicon cost, and full programmability.
一般来说,用于通信编码和解码的VLSI(非常大规模集成)设计应该提供高吞吐量,实现低计算延迟,占用低硅成本,并处理多比特操作算法。专用指令集处理器(ASIP)是满足所有这些要求的优化解决方案。本文提出了循环冗余校验、Reed-Solomon和基本位操作的ASIP。该处理器采用软硬件协同设计方法,采用单指令多数据架构。该设计占地0.71mm2 (190 kgates),采用65nm CMOS工艺,包括34.5KB单端口内存和45 kgates逻辑。在1.0GHz时钟频率下,基本位操作、RS(255239)解码和CRC计算的吞吐量分别达到128Gb/s、8Gb/s和128Gb/s。提出的设计与最先进的VLSI设计进行了评估,显示其高性能,低硅成本和完全可编程性。
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引用次数: 1
Development of a helium gas balloon flying system for aerial photographing and observation 航空摄影观测用氦气气球飞行系统的研制
E. N. Mambou, G. M. Yamga, J. Meyer, H. Ferreira
This paper describes the implementation of a helium gas balloon flying system equipped with a camera and tracking subsystem for aerial photography. This is partially the results of a successful project conducted in November 2012 by a group of electrical and electronic students from the University of Johannesburg. The goal of this project was to take aerial pictures at the highest possible altitude above the sea level from the flying system while tracking its position in real-time. The solution proposed was based on a low cost unmanned system for a reliable and optimal aerial observation and tracking, suitable for start-ups companies or research groups.
本文介绍了一种配备摄像机和航拍跟踪子系统的氦气气球飞行系统的实现。2012年11月,来自约翰内斯堡大学的一群电气和电子专业的学生进行了一个成功的项目,这在一定程度上是该项目的成果。该项目的目标是在海拔最高的地方从飞行系统拍摄航拍照片,同时实时跟踪其位置。提出的解决方案是基于低成本的无人系统,用于可靠和最佳的空中观察和跟踪,适合初创公司或研究小组。
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引用次数: 1
Design and implementation of reliable data transmission system for emergency communications based on 3G and BeiDou Navigation Satellite 基于3G和北斗导航卫星的应急通信可靠数据传输系统的设计与实现
Ting Yi, Ming Che, He Li
In recent years, natural disasters and environmental pollution events occur frequently and seriously threaten people's lives and property. The first step of disaster prevention and mitigation is obtaining the monitoring data of disaster situation. Currently, there are two main problems in transferring monitoring data, one is that disaster monitoring sensors are always located in remote, which are hard to access the Internet to send and receive data effectively; the other is that when major natural disasters occurs, traditional communication network, like GSM, GPRS or Internet could not provide a reliable data transmission link or even totally failed. And our studies aimed to design and implement an embedded heterogeneous communication network router (EHCNR), which integrated three communication techniques: Ethernet, the third-generation telecommunication (3G) and the short message service (SMS) of BeiDou Navigation Satellite System (BDS). Based on EHCNR, we built communication mechanism to achieve the efficient and reliable transmission of disaster monitoring data. Environmental information monitored in our study was gathered by special designed sensors. All of the monitoring data would finally be transmitted to central data warehouse server (CDWS) and stored in database. In addition, we defined transmission priority for the three heterogeneous communication networks in the protocol layer of EHCNR, and realized the device-to-device (D2D) communication in 3G network crossing different telecom operators; also we designed and implemented the data transmission through SMS of BDS. Finally, we did experiments based on EHCNR under complicated conditions, and the test results were reliable and efficient.
近年来,自然灾害和环境污染事件频发,严重威胁着人民群众的生命财产安全。防灾减灾的第一步是获取灾情监测数据。目前,灾害监测数据的传输主要存在两个问题,一是灾害监测传感器往往位于偏远地区,难以接入互联网进行有效的数据收发;二是发生重大自然灾害时,GSM、GPRS、Internet等传统通信网络无法提供可靠的数据传输链路,甚至完全失效。本研究旨在设计并实现一种嵌入式异构通信网络路由器(EHCNR),该路由器集成了以太网、第三代电信(3G)和北斗卫星导航系统(BDS)短消息服务(SMS)三种通信技术。在EHCNR的基础上,建立通信机制,实现灾害监测数据的高效、可靠传输。我们研究中监测的环境信息是通过特殊设计的传感器收集的。所有的监控数据最终将被传输到中央数据仓库服务器(CDWS)并存储在数据库中。此外,在EHCNR协议层定义了三种异构通信网络的传输优先级,实现了3G网络中跨不同电信运营商的设备到设备(D2D)通信;设计并实现了北斗系统的短信数据传输。最后,我们在复杂条件下进行了基于EHCNR的实验,实验结果可靠、高效。
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引用次数: 2
Remote sensing image edge-detection based on improved Canny operator 基于改进Canny算子的遥感图像边缘检测
Shi Guiming, Suo Jidong
The edge details of the remote sensing image is key for the target detection with complex background. Traditional Canny detection operator requires human intervention, does not have the adaptive ability in the variance of Gaussian filtering and the threshold. Compound morphological smoothing replaces Gaussian filtering, can not only maintain the edge information, but also reduce noise impact. Then Otsu method can specify the threshold adaptively, the edge detected is more continuous, and can decrease the false edges. In order to extract the edges of the remote sensing image proposed an approach based on Canny edge detection operator. Finally, we refine the edge by using morphological structure element. The experimental results show that the improved Canny algorithm has a good anti-noise function and precision on image processing of remote sensing.
遥感图像的边缘细节是复杂背景下目标检测的关键。传统的Canny检测算子需要人工干预,不具备高斯滤波方差和阈值的自适应能力。复合形态平滑代替高斯滤波,既能保持边缘信息,又能降低噪声的影响。然后,Otsu方法可以自适应地指定阈值,检测到的边缘更连续,并且可以减少假边缘。为了提取遥感图像的边缘,提出了一种基于Canny边缘检测算子的方法。最后,利用形态结构元素对边缘进行细化。实验结果表明,改进的Canny算法在遥感图像处理中具有良好的抗噪功能和精度。
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引用次数: 22
Energy-efficient resource allocation with 3D beamforming in 3D MIMO-OFDMA systems 三维MIMO-OFDMA系统中三维波束形成的节能资源分配
Zhe Li, Yueyun Chen, Zhiyuan Mai
The paper investigates the energy efficiency of the 3D MIMO systems with Orthogonal Frequency Division Multiple-Access (OFDMA). In 3D MIMO-OFDMA communication systems, cellular users' specific downtilt angles are exploited through dynamic vertical beamforming. The objective of our proposed optimization problem is jointly concerning resource block assignment, power allocation and downtilt angles adjustment to maximize the energy efficiency measured by the metric of “bits-per-Joule”. We prove that the energy-efficient optimization problem can be transformed into an equivalent form which can be solved by an iterative algorithm. With the Lagrange dual method utilized in each iteration, we can obtain the closed-form solution. Simulation results validate that our proposed energy-efficient resource allocation algorithm outperforms the traditional algorithm in two-dimensional (2D) MIMO systems without considering the user's specific downtilt angle.
本文研究了正交频分多址(OFDMA)三维MIMO系统的能量效率。在三维MIMO-OFDMA通信系统中,通过动态垂直波束形成来利用蜂窝用户的特定向下倾斜角度。我们提出的优化问题的目标是共同关注资源块分配,功率分配和向下倾斜角度调整,以最大限度地提高能源效率,以“比特每焦耳”为度量标准。证明了节能优化问题可以转化为等价形式,并可以用迭代算法求解。在每次迭代中使用拉格朗日对偶方法,我们可以得到闭型解。仿真结果表明,在不考虑用户特定下倾角的情况下,本文提出的高效资源分配算法在二维MIMO系统中优于传统算法。
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引用次数: 1
Multi-lingual unsupervised acoustic modeling using multi-task deep neural network under mismatch conditions 失配条件下多任务深度神经网络多语种无监督声学建模
Yao Haitao, Xu Ji, Liu Jian
This Cross-lingual knowledge sharing based acoustic modeling methods are usually used in Automatic Speech Recognition (ASR) of languages which do not have enough transcribed speech for acoustic model (AM) training. Conventional methods such as IPA based universal acoustic modeling have been proved to be effective under matched acoustic conditions, while usually poorly preformed when mismatch appears between the target language and the source languages. This paper proposes a method of multi-lingual unsupervised AM training for zero-resourced languages under mismatch conditions. The proposed method includes two main steps. In the first step, initial AM of the target low-resourced language was obtained using multi-task training method, in which original source language data and mapped source language data are jointly used. In the second step, AM of the target language is trained using automatically transcribed target language data, in the way of iteratively training new AMs and adapting the initial AMs. Experiments were conducted on a corpus with 100 hours untranscribed Japanese speech and 300 hours transcribed speech of other languages. The best result achieved by this paper is 51.75% character error rate (CER), which obtains 24.78% absolute reduction compared to baseline IPA system.
这种基于跨语言知识共享的声学建模方法通常用于没有足够转录语音进行声学模型训练的语言的自动语音识别(ASR)。传统的基于IPA的通用声学建模方法已被证明在声学匹配条件下是有效的,而在目标语言和源语言不匹配的情况下通常表现不佳。提出了一种在不匹配条件下对零资源语言进行多语种无监督AM训练的方法。该方法包括两个主要步骤。第一步,采用联合使用原始源语言数据和映射源语言数据的多任务训练方法获得目标低资源语言的初始AM;第二步,使用自动转录的目标语言数据,以迭代训练新的目标语言模型和自适应初始目标语言模型的方式训练目标语言的目标语言模型。实验以100小时未转录的日语语音和300小时转录的其他语言语音为对象进行。本文的最佳结果是字符错误率(CER)为51.75%,与基准IPA系统相比,绝对降低了24.78%。
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引用次数: 0
A self-calibrated centroid localization algorithm for indoor ZigBee WSNs 一种室内ZigBee无线传感器网络自校准质心定位算法
Tanveer Ahmad, Xue Jun Li, Boon-Chong Seet
A self-calibrated centroid localization algorithm is presented for wireless sensor networks based on IEEE 802.15.4 radio standard. Beside common issues in ranging accuracy using either received signal strength (RSSI) or link quality (LQI), it is challenging to cope with the fast changing environments. Although good accuracy has been achieved with methods such as Weighted Maximum Likelihood Estimation (WMLE) and Weighted Centroid Localization (WCL), these methods assume that environmental parameters, such as antenna gain, humidity, temperature, metallic surfaces, radio interference and other objects in the neighborhood remain constant over the localization period. To improve accuracy in a practical system where environment is continuously changing, the Self-Calibrating Centroid Localization (SCCL) algorithm is introduced in this paper. Simulation shows that SCCL can reduce the localization error by 65% as compared to WCL.
提出了一种基于IEEE 802.15.4无线标准的无线传感器网络自校准质心定位算法。除了使用接收信号强度(RSSI)或链路质量(LQI)测距精度的常见问题外,应对快速变化的环境也是一项挑战。虽然加权最大似然估计(Weighted Maximum Likelihood Estimation, WMLE)和加权质心定位(Weighted Centroid Localization, WCL)等方法已经取得了很好的精度,但这些方法都假定环境参数,如天线增益、湿度、温度、金属表面、无线电干扰和附近其他物体在定位期间保持不变。为了提高环境不断变化的实际系统的定位精度,本文介绍了自标定质心定位(SCCL)算法。仿真结果表明,与WCL相比,SCCL可将定位误差降低65%。
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引用次数: 26
Advanced double-talk detection algorithm based on joint signal energy and cross-correlation estimation 基于联合信号能量和互相关估计的先进双话检测算法
A. Muzahid, K. Ingrid, S. Raton Mondol, Y. Zhou
Acoustic Echo Cancellation (AEC) is employed in hands-free communication systems to enhance communication experience. Double-Talk Detection (DTD) plays a vital role in AEC to distinguish the far-end and near-end signals and its failure will cause the system divergence. An efficient new DTD algorithm based on the joint signal energy and cross-correlation estimation techniques is proposed in this paper to reduce the DTD faults. The proposed algorithm can provide fast DTD and enhanced system performance without increasing much more computational complexity over the conventional techniques. Simulation results show the performance improvement achieved by the proposed technique.
在免提通信系统中采用回声消除技术来提高通信体验。双话检测(DTD)在AEC中起着区分远端和近端信号的重要作用,它的失效将导致系统发散。本文提出了一种基于联合信号能量和互相关估计技术的有效的DTD新算法,以减少DTD错误。该算法可以提供快速的DTD并提高系统性能,而不会比传统技术增加更多的计算复杂度。仿真结果表明,该方法提高了系统的性能。
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引用次数: 2
Performance analysis of OSTBC-MIMO systems employing M-QAM transmission over independent but not necessarily identical generalized-K fading channels 采用M-QAM传输的OSTBC-MIMO系统在独立但不一定相同的广义k衰落信道上的性能分析
Jie He, Kun Xiao
The performance of Orthogonal Space-Time Block Codes (OSTBC) for Multiple-Input Multiple-Output (MIMO) systems employing M-QAM transmission is investigated over independent but not necessarily identically distributed (i.n.i.d.) generalized-K fading channels with arbitrary real-valued k and m. Before this, the i.n.i.d. generalized-K fading channel has never been considered for the OSTBC-MIMO systems. Especially, the effects of the shaping parameter k on the OSTBC-MIMO system performance are unknown. Specifically, we investigate mainly the significance of the shaping parameter k on the OSTBC-MIMO system performance in terms of the average Symbol Error Probability (SEP) and Shannon capacity. By establishing the system model, the Probability Density Function (PDF) of the equivalent Signal to Noise Ratio (SNR) is derived. Then, the closed-form expressions of such performance metrics are obtained successively. Finally, Numerical results prove that the derived expressions are validated via a set of Monte-Carlo simulations and the implications of the shaping parameter k on the overall performance are highlighted.
研究了采用m - qam传输的多输入多输出(MIMO)系统的正交空时分组码(OSTBC)在具有任意实值k和m的独立但不一定同分布(i.i.d)广义k衰落信道上的性能。在此之前,从未考虑过用于OSTBC-MIMO系统的i.i.d广义k衰落信道。特别是,整形参数k对OSTBC-MIMO系统性能的影响尚不清楚。具体来说,我们主要从平均符号错误概率(SEP)和香农容量两个方面研究了整形参数k对OSTBC-MIMO系统性能的影响。通过建立系统模型,推导了等效信噪比的概率密度函数(PDF)。然后,依次得到了这些性能指标的封闭表达式。最后,通过一组蒙特卡罗模拟验证了推导式的正确性,并强调了成形参数k对整体性能的影响。
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引用次数: 0
期刊
2016 8th IEEE International Conference on Communication Software and Networks (ICCSN)
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