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QoS constrained robust MIMO transceiver design under unknown interference 未知干扰下QoS约束的鲁棒MIMO收发器设计
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417497
Xin He, Jianwu Chen, Yik-Chung Wu
{"title":"QoS constrained robust MIMO transceiver design under unknown interference","authors":"Xin He, Jianwu Chen, Yik-Chung Wu","doi":"10.1109/ChinaCom.2012.6417497","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417497","url":null,"abstract":"We study the robust transceiver optimization in multiple-input multiple-output (MIMO) systems aiming at minimizing transmit power under probabilistic quality-of-service (QoS) requirements. Owing to the unknown distributed interference, the channel estimation error can be arbitrary distributed. Under this situation, the QoS requirements should account for the worst-case channel estimation error distribution. While directly finding the worst-case distribution is challenging, two methods are proposed to solve the robust transceiver design problem. One is based on the Chebyshev inequality, the other is based on a novel duality method. Simulation results show that the QoS requirement is satisfied by both proposed algorithms. Furthermore, among the two proposed methods, the duality method shows a superior performance in transmit power, while the Chebyshev method demonstrates a lower computational complexity.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126396898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Handover self-optimization mechanism based on velocity for cellular networks 基于速度的蜂窝网络切换自优化机制
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417555
Yang Yang, Peng Yu, Wenjing Li
{"title":"Handover self-optimization mechanism based on velocity for cellular networks","authors":"Yang Yang, Peng Yu, Wenjing Li","doi":"10.1109/ChinaCom.2012.6417555","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417555","url":null,"abstract":"Quality of Handover (QoH) is a crucially important performance indicator for cellular networks. With the increasing requirement of users, the velocity of users should be highly valued, because it has great effect on handover process and user experience. In this paper, we propose Handover Self-optimization Mechanism based on Velocity (HSMV), a novel handover mechanism which can improve the performance: firstly, some original data should be extracted from the mobile devices and a mathematic model will be proposed to estimate the velocity of users using Received Signal Strength (RSS); secondly, the relation between handover margin (HM) and the estimated velocity is concluded based on the model, then the value of HM will be adjusted accordingly; finally, the assessment method to estimate velocity as well as tackle with some handover problems will be validated. Simulation results show that it can not only gain relatively accurate velocity but also decrease the call drop rate significantly.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126483547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Design and implementation of a low-cost fault-tolerant on-board computer for micro-satellite 微型卫星低成本容错机载计算机的设计与实现
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417462
Shiqiang Tian, Zuobiao Yin, Jian Yan, Xuming Liu
{"title":"Design and implementation of a low-cost fault-tolerant on-board computer for micro-satellite","authors":"Shiqiang Tian, Zuobiao Yin, Jian Yan, Xuming Liu","doi":"10.1109/ChinaCom.2012.6417462","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417462","url":null,"abstract":"In recent years, as an important frontier of astronautics, micro-satellites have been widely used for various space-oriented missions. During various on-board components, the on-board computer (OBC) is essential to take charge of many tasks such as command and data handing, communication and payload management. However, the resources on micro-satellites are so limited that the OBC should not only meet the requirements of excellent performance and high reliability, but also be in proper power consumption and cost. The purpose of this paper is to present a solution for developing a low-cost, low power consumption and reliable OBC system for micro-satellites. The proposed system is based on commercial-off-the-shelf (COTS) components and Linux operating system. Besides, considering the harsh space environment, a set of fault tolerant strategies are introduced to improve the reliability of the OBC. Finally, the analysis and test results are provided to illustrate the relatively low-cost, low power consumption and high reliability of the proposed OBC system.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122246863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Adaptive digital video transmission with STBC over Rayleigh fading channels 基于瑞利衰落信道的STBC自适应数字视频传输
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417563
Jia-Chyi Wu, Chi-Min Li, Kuo-Hsean Chen
{"title":"Adaptive digital video transmission with STBC over Rayleigh fading channels","authors":"Jia-Chyi Wu, Chi-Min Li, Kuo-Hsean Chen","doi":"10.1109/ChinaCom.2012.6417563","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417563","url":null,"abstract":"In this study, we have proposed an algorithm assigned rates to MPEG2 video code and convolutional channel code, combined with space-time block coding (STBC) schemes, associated with BPSK/QPSK modulation method, based upon the feedback information from Performance Control Unit (PCU) over Rayleigh fading channel. The proposed scheme investigates a combined video source and channel coding together providing a uniform video transmission rate to achieve better system performance in wireless systems.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122278666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Study on the evaluate methods of head and hand influence on mobile antenna radiation performance 头部和手部对移动天线辐射性能影响的评估方法研究
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417570
Xinzhong Li, Jun Yang, Bin Fan, Jianquan Wang
{"title":"Study on the evaluate methods of head and hand influence on mobile antenna radiation performance","authors":"Xinzhong Li, Jun Yang, Bin Fan, Jianquan Wang","doi":"10.1109/ChinaCom.2012.6417570","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417570","url":null,"abstract":"The radiation performance of the terminal antennas is influenced by the head and hand of the person who is holding the device. At the antenna design phase, the performance reduction should be considered sufficiently in order to make sure the Total Radiated Power (TRP) and Total Radiated Sensitivity (TRS) of the terminal satisfy the requirement of the system. In this paper, an evaluate method of head and hand influence to the radiation performance of is illustrated, through which tolerance of the terminal antenna TRP/TRS decrease could be evaluated conveniently and efficiently.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116051009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Hierarchical activeness state evaluation model for BBS network community BBS网络社区层次活跃状态评价模型
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417477
Xiuzhen Chen, Jianhua Li, Shenghong Li, Yanan Wang
{"title":"Hierarchical activeness state evaluation model for BBS network community","authors":"Xiuzhen Chen, Jianhua Li, Shenghong Li, Yanan Wang","doi":"10.1109/ChinaCom.2012.6417477","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417477","url":null,"abstract":"Evaluating behavior state of online communities is of critical importance for the study of online forum systems. A quantitative hierarchical state evaluation model is proposed in this paper to evaluate activeness degree of network groups focusing on one common topic. It consists of three levels: behavior, individual, and group. And the computational method is developed based on the scale of a network group and the behavior of its individuals. The active state indexes of a group and its individuals are calculated by weighting the importance of individuals based on individual actions: posting or browsing. The experiment results show that this model can provide intuitive active status of network communities so that network opinion administrators are freed from tedious analysis tasks in order to have activeness states of different groups. A series of factors including time, title, and diffusion extent of a topic are illustrated to have effect on evolution of active state for network group behaviors. And we also illustrate that the Matthew effect exists in network communities. This model is valuable for guiding, managing and controlling network public opinions.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"223 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116155682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Robust beamforming for coherent signals in the presence of steering vector and correlation matrix errors 存在导向矢量和相关矩阵误差时相干信号的鲁棒波束形成
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417506
Lei Zhang, W. Liu
{"title":"Robust beamforming for coherent signals in the presence of steering vector and correlation matrix errors","authors":"Lei Zhang, W. Liu","doi":"10.1109/ChinaCom.2012.6417506","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417506","url":null,"abstract":"Based on the uniform linear array structure and the spatial-smoothing technique, a robust beamformer for the reception of coherent signals is proposed by considering both the steering vector error and the sample correlation matrix error. The resultant constrained optimisation problem is transformed into a generalised eigenvector problem and three implementations are studied, including forward-only, forward-backward, and real-valued cases, supported by simulation results.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"298 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134376941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Embedded intelligent video surveillance and cooperative tracking system 嵌入式智能视频监控与协同跟踪系统
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417560
Fei Zhang, Pinyi Ren, Hao Chen, Guobing Li
{"title":"Embedded intelligent video surveillance and cooperative tracking system","authors":"Fei Zhang, Pinyi Ren, Hao Chen, Guobing Li","doi":"10.1109/ChinaCom.2012.6417560","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417560","url":null,"abstract":"Nowadays, mobility and flexibility are becoming more and more important in surveillance systems to deal with emergencies and contingencies. In this paper, we design and implement an embedded intelligent video surveillance and cooperative tracing system based on DM6467T. In our system, the ARM core of DM6467T is mainly in charge of getting encoded video data from the Internet, while the DSP core conducts video decoding and intelligent video computing. The video computing consists of three parts: moving objects detecting, moving objects locating and moving objects tracking. Specifically, we propose an improved template matching algorithm to solve the global motion compensation problem while reducing the computing complexity. Taking full advantage of the DM6467T's DSP+ARM heterogeneous processors, the embedded system is convenient and flexible to implement and can be widely used in various surveillance environments, especially in occasional and emergent surveillance scenarios.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"57 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133095617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
A joint consideration of channel assignment and multicast routing in MCMR WMNs MCMR WMNs中信道分配和组播路由的联合考虑
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417562
Wen-Lin Yang, Wan-Ting Hong
{"title":"A joint consideration of channel assignment and multicast routing in MCMR WMNs","authors":"Wen-Lin Yang, Wan-Ting Hong","doi":"10.1109/ChinaCom.2012.6417562","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417562","url":null,"abstract":"In this paper, we are interested in an optimization problem whose goal is to construct an interference-free and delay-constrained multicast tree with maximized serviced mesh clients in multi-channel multi-radio wireless mesh networks. Based on a cross-layer design paradigm, we propose a cross-layer and load-oriented (CLLO) algorithm which can consider application demand, multicast routing and channel assignment jointly. We have, as well, conducted a set of simulations to verify the efficiency of the CLLO algorithm. The experimental results show that our proposed algorithm outperforms previous methods in terms of the number of serviced mesh clients and throughputs.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133800560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Analysis for singal processing development with general purpose processor 用通用处理器开发分析信号处理
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/CHINACOM.2012.6417592
He Zhiqiang, Sun Jian-xing, Duan Ran, Yue Chen
{"title":"Analysis for singal processing development with general purpose processor","authors":"He Zhiqiang, Sun Jian-xing, Duan Ran, Yue Chen","doi":"10.1109/CHINACOM.2012.6417592","DOIUrl":"https://doi.org/10.1109/CHINACOM.2012.6417592","url":null,"abstract":"This paper presents an analysis for implementation of high-throughput wireless communication signal processing system on general purpose processor (GPP). The large amount of complex computation brings challenge for the conventional platforms. GPP was compared with DSP and FPGA, and regarded as a new direction for signal processing system development. The program optimization on GPP platforms is necessary based on our research and developing experience. Therefore, we come up with the basic principle and optimization methods for GPP realization, especially for the application of multicore technique. Our analysis is proved to be convincible by solid justifications shown in the paper.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114540468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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