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7th International Conference on Communications and Networking in China最新文献

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Joint optimization of sensing time and cooperative user in cognitive radio 认知无线电中感知时间与协同用户的联合优化
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417500
Xin Liu, Qingzhong Li, Xuezhi Tan
{"title":"Joint optimization of sensing time and cooperative user in cognitive radio","authors":"Xin Liu, Qingzhong Li, Xuezhi Tan","doi":"10.1109/ChinaCom.2012.6417500","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417500","url":null,"abstract":"We proposed a new cognitive radio (CR) model in this paper whereby CR senses the environment periodically and then forwards the sensing results one at a time and through such process CR develops an efficiency function to reflect the performance and efficiency of the proposed model. In addition we proposed a joint algorithm of sensing time and a cooperative user in order to obtain the maximal efficiency of the CR network. Results obtained from simulations process shows that the efficiency of the proposed algorithm is predominant and when SNR=0dB, it holds 0.4W more residual power than that of sensing-throughput tradeoff model. And lastly we shows that cooperative detection can improve the efficiency of the model, however the results also shows that the efficiency of the model may degrade when large numbers of cooperative CRs are involved in the process.","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":"127661162","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
Multiantenna based spectrum sensing via Friedman test for cognitive radio 基于多天线频谱感知的认知无线电弗里德曼测试
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417499
Ming Jin, Youming Li, Gang Wang, Jiehui Chen
{"title":"Multiantenna based spectrum sensing via Friedman test for cognitive radio","authors":"Ming Jin, Youming Li, Gang Wang, Jiehui Chen","doi":"10.1109/ChinaCom.2012.6417499","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417499","url":null,"abstract":"Several multiantenna based spectrum sensing detectors have been presented for overcoming noise uncertainty by exploiting antenna correlation. However, these detectors degrade seriously when the antenna correlation is low or the noises through antennas are correlated (i.e. spatial colored noise), and even fail to perform sensing when primary signals through antennas are uncorrelated (i.e., antenna uncorrelation). In order to address this issue, in this paper, we present a Friedman test based spectrum sensing detector which compares the power of the received signals through antennas and hence it needs no priori information of the noise and the primary signal. In addition, the decision threshold level of the presented detector is not related to the number of samples, but related only to the number of antennas and the required false alarm probability. Finally, the performance of the proposal is verified by numerical simulations.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"1 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":"117241265","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
Study on LTE MIMO schemes for indoor scenarios 室内场景下LTE MIMO方案研究
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417518
Z. Lv, Jianquan Wang, Changling Wang, Qingyu Cai, Xinzhong Li, Jun Yang, Youxiang Wang, Bin Fan, Y. Sheng
{"title":"Study on LTE MIMO schemes for indoor scenarios","authors":"Z. Lv, Jianquan Wang, Changling Wang, Qingyu Cai, Xinzhong Li, Jun Yang, Youxiang Wang, Bin Fan, Y. Sheng","doi":"10.1109/ChinaCom.2012.6417518","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417518","url":null,"abstract":"With the development of Internet and 3G communication systems, the requirement of data transmission is increasing. Multi-Input-Multi-Output (MIMO) as one of the important techniques to improve the capacity of Long Term Evolution (LTE) systems have been widely discussed. However, how to deploy MIMO for indoor scenarios is still a problem which needs to be solved at present. In this paper, dual-path single-polarized antenna and dual-path dual-polarized antenna solutions are analyzed. According to simulation and test results, under appropriate indoor scenarios, the both solutions have good coverage performance and have 56% improvement in capacity performance compared with traditional single-path single-polarized antenna solution.","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":"121175822","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
A decorrelation algorithm based on virtual array extension 一种基于虚拟数组扩展的去相关算法
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417505
Hong-Liang Duan, Dengshan Huang, Liyang Zhou, Haihua Chen, Jinglin Shi
{"title":"A decorrelation algorithm based on virtual array extension","authors":"Hong-Liang Duan, Dengshan Huang, Liyang Zhou, Haihua Chen, Jinglin Shi","doi":"10.1109/ChinaCom.2012.6417505","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417505","url":null,"abstract":"The decorrelation algorithms are used to filter coherent signals generated from multipath propagation in practical array signal processing systems. However, the existing decorrelation DOA algorithms eliminate the coherency by sacrificing effective array aperture. In this paper, a modified SS algorithm, Virtual-array SS (VSS), is proposed based on virtual array extension for decorrelation. VSS utilizes non-circular symmetry incident signal to extend the original array to generate virtual signal array. The direction finding performance of the virtual array is analyzed using MUSIC-like algorithms. Simulation results show that the proposed algorithm is effective on decorrelation.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"6 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":"121199815","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: 8
A novel CoS-enabled path selection algorithm with traffic grooming function for multi-layer optical networks 一种具有流量疏导功能的基于cos的多层光网络路径选择算法
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417493
Xin Chen, M. Zhang, Lei Wang, Lifang Zhang, Hui Ding, Shanguo Huang
{"title":"A novel CoS-enabled path selection algorithm with traffic grooming function for multi-layer optical networks","authors":"Xin Chen, M. Zhang, Lei Wang, Lifang Zhang, Hui Ding, Shanguo Huang","doi":"10.1109/ChinaCom.2012.6417493","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417493","url":null,"abstract":"Aiming at resolving the problem of Class of Service (CoS) and traffic grooming, a CoS-enabled path selection algorithm with traffic grooming function (CPSATG) is proposed in this paper. Simulations are conducted to compare the proposed scheme with methods which have not considered CoS and traffic redundancy. Results show that CPSATG has a much better blocking probability performance and effective resource utilization than the existing methods with almost the same cost of network nodes.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"43 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":"124367067","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
Test methodologies for Active Antenna System 有源天线系统试验方法
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417573
Gang Liu, Xiang Wu, Zhe Chen, Dongyi Zou
{"title":"Test methodologies for Active Antenna System","authors":"Gang Liu, Xiang Wu, Zhe Chen, Dongyi Zou","doi":"10.1109/ChinaCom.2012.6417573","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417573","url":null,"abstract":"Test methods for Active Antenna System (AAS) have been a hot topic in 3Gpp. Conductive and Over-The-Air (OTA) test approaches are two main candidate methods. In this paper, the structure for Active-Antenna-System is introduced and the advantages and disadvantages between the two test methodologies are discussed. Consequently, the balance between efficiency and accuracy may be delicate.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"19 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":"124414021","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
Approximate performance study of non-line-of-sight ultraviolet communication links in noncoplanar geometry 非共面几何中非视距紫外通信链路近似性能研究
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417494
Y. Zuo, Houfei Xiao, Wenbo Zhang, Haoran Xu, Jian Wu
{"title":"Approximate performance study of non-line-of-sight ultraviolet communication links in noncoplanar geometry","authors":"Y. Zuo, Houfei Xiao, Wenbo Zhang, Haoran Xu, Jian Wu","doi":"10.1109/ChinaCom.2012.6417494","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417494","url":null,"abstract":"This paper presents an approximate closed-form model of non-line-of-sight (NLOS) ultraviolet (UV) single-scatter propagation in noncoplanar geometry for tractable analysis. The path loss is given as a function of the transceiver geometry settings and the optical properties of the atmosphere. Numerical examples on path loss show that the approximate model is consistent with the integral-form noncoplanar propagation model. Then, the data rate and the channel capacity of a quantum-limited receiver are further investigated with different parameters, such as bit error rate (BER), communication range, and transmitter optical power and off-axis angle.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"82 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120919177","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
An energy-efficiency Optimized LEACH-C for wireless sensor networks 一种用于无线传感器网络的高能效优化LEACH-C
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417532
Shuo Shi, Xinning Liu, Xuemai Gu
{"title":"An energy-efficiency Optimized LEACH-C for wireless sensor networks","authors":"Shuo Shi, Xinning Liu, Xuemai Gu","doi":"10.1109/ChinaCom.2012.6417532","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417532","url":null,"abstract":"LEACH-C is a cluster algorithm in which cluster heads are randomly selected from the nodes with energy above the average, and the simulated annealing algorithm is utilized to find the optimal solution with better position to reduce the energy loss of cluster heads. This paper presents an energy-efficiency Optimized LEACH-C. First, we select a group of cluster heads using LEACH-C. Next, taking retransmission and acknowledgment into consideration, we create a model of cluster head energy consumption. We will calculate the quadratic sum of the distances from each cluster head to its member nodes in the optimal solution. Finally, the largest energy consumption for a single cluster head in the next round will be estimated, and all nodes with residual energy larger than the calculated consumption will be taken to a new round of simulated annealing to find a better solution. Thus, loss of the cluster head for each round can be minimized, and the WSN lifetime can be extended ultimately.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"104 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":"115218835","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: 89
The development of a skin inspection imaging system on an Android device 基于Android设备的皮肤检测成像系统的开发
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417564
Ding-Horng Chen, Tsai-Rong Chang, Ren-Jie Cao
{"title":"The development of a skin inspection imaging system on an Android device","authors":"Ding-Horng Chen, Tsai-Rong Chang, Ren-Jie Cao","doi":"10.1109/ChinaCom.2012.6417564","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417564","url":null,"abstract":"The skin inspection result provides helpful skin health information for further skin analysis. In tradition, the skin status examination is performed by a skin probe, which is operated by a trained professional, contact the skin to obtain the necessary information. The skin probes are expensive, the examination costs much time and money, and the reused probes also cause a health problem. In this paper, a skin inspection imaging system is developed on an Android device. A series of skin images is acquired by a conventional digital camera connecting to the Android device, and then pre-processes these images to extract the image features to classify the skin conditions. The proposed system is portable and it provides a cheaper solution to detect the skin status.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"50 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":"131695558","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
Physical-layer network coding in OFDM system: Analysis and performance OFDM系统中的物理层网络编码:分析与性能
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417464
Xun Wang, Yinglin Xu, Z. Feng
{"title":"Physical-layer network coding in OFDM system: Analysis and performance","authors":"Xun Wang, Yinglin Xu, Z. Feng","doi":"10.1109/ChinaCom.2012.6417464","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417464","url":null,"abstract":"The number of mobile terminals keeps a sustaining growth, and brings the importance of wireless network to a new level. Wireless networks are supposed to provide higher capacity for broadband services, as well as to be as robust and fast as wired network. The reason for the distinct gap between the two is that in wireless networks, the signal transmitted by a node may reach several other nodes, and a node may receive signals from several other nodes simultaneously. This broadcast nature is traditionally considered harmful, because it may cause interference or even collision. However, the novel concept of network coding turns this drawbacks into a capacity boosting potential advantage. Network coding is a technique where the nodes of a network take several packets and combine them together for transmission instead of simply relaying the packets they receive. In this paper, we proposed a physical-layer network coding scheme which is simple to implement for OFDM system. We apply this scheme in 802.11g system to demonstrate that with modified frame format, intentionally collided messages can be decoded and improve network throughput as well as spectrum efficiency.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"7 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":"132075826","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: 7
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