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2010 IEEE 12th International Conference on Communication Technology最新文献

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Cooperative spectrum sensing with sensing task allocation in cognitive radio networks 认知无线电网络中具有感知任务分配的协同频谱感知
2010 IEEE 12th International Conference on Communication Technology Pub Date : 2010-11-01 DOI: 10.1109/ICCT.2010.5688855
Han Han, Fei Song, Qi-hui Wu, Jinlong Wang, Jia Li
{"title":"Cooperative spectrum sensing with sensing task allocation in cognitive radio networks","authors":"Han Han, Fei Song, Qi-hui Wu, Jinlong Wang, Jia Li","doi":"10.1109/ICCT.2010.5688855","DOIUrl":"https://doi.org/10.1109/ICCT.2010.5688855","url":null,"abstract":"In the cooperative spectrum sensing with multi-primary-user, one secondary user may have different detection performance for different primary user, due to the different distance to the primary users. A novel idea for the cooperative sensing is to allocate the secondary users with excellent detection performance to sense the corresponding primary user. The sensing task allocation is based on this idea in this paper. We formulate the problem to an optimization problem, but its a NP-hard problem. Then we propose a greedy search algorithm with which have comparable performance with that of brute-force search and have much less computational complexity. At last, we analysis the impacts of the user number and the distance to the systemic cooperative sensing time, validating the advantage of sensing task allocation.","PeriodicalId":253478,"journal":{"name":"2010 IEEE 12th International Conference on Communication Technology","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114300893","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
Improved particle swarm optimization - based antenna selection scheme for correlated MIMO channels 基于改进粒子群优化的相关MIMO信道天线选择方案
2010 IEEE 12th International Conference on Communication Technology Pub Date : 2010-11-01 DOI: 10.1109/ICCT.2010.5688888
J. Dai, Ming Chen
{"title":"Improved particle swarm optimization - based antenna selection scheme for correlated MIMO channels","authors":"J. Dai, Ming Chen","doi":"10.1109/ICCT.2010.5688888","DOIUrl":"https://doi.org/10.1109/ICCT.2010.5688888","url":null,"abstract":"To reduce the severe performance degradation of the traditional antenna selection schemes in correlated Multiple-Input Multiple-Output (MIMO) channels, this paper proposes a new antenna selection scheme via an improved particle swarm optimization (IMPSO) algorithm. IMPSO algorithm increases the rank of the correlated fading channel matrix. These increments, directly, contribute to the Effective Degree Of Freedom (EDOF) of the channel and hence the performance. Through simulations, it was demonstrated that the proposed scheme provides excellent performance in correlated MIMO channels.","PeriodicalId":253478,"journal":{"name":"2010 IEEE 12th International Conference on Communication Technology","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114431760","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
Low complexity QRM-MLD algorithm for MIMO systems with 256 QAM modulations 256 QAM调制MIMO系统的低复杂度QRM-MLD算法
2010 IEEE 12th International Conference on Communication Technology Pub Date : 2010-11-01 DOI: 10.1109/ICCT.2010.5688561
Xinli Duan, Guangliang Ren, Lihua Yang, Guanghui Yu
{"title":"Low complexity QRM-MLD algorithm for MIMO systems with 256 QAM modulations","authors":"Xinli Duan, Guangliang Ren, Lihua Yang, Guanghui Yu","doi":"10.1109/ICCT.2010.5688561","DOIUrl":"https://doi.org/10.1109/ICCT.2010.5688561","url":null,"abstract":"An improved detection scheme is proposed for the MIMO-OFDM system with 256QAM modulation. Unlike the conventional QRM-MLD approaches, the proposed scheme reduces the expanded nodes of every parent nodes in each layer using the hierarchical structure of 256 QAM. Simulation results show the complexity of the proposed method is about one-sixth that of QRM-MLD significantly for the same performance. Moreover, for similar complexity, the proposed method has the 2dB gain compared with QRM-MLD method at the BER of 10−4.","PeriodicalId":253478,"journal":{"name":"2010 IEEE 12th International Conference on Communication Technology","volume":"217 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114851833","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
Improved STBC transmit diversity scheme in high speed mobile environment 高速移动环境下改进的STBC发射分集方案
2010 IEEE 12th International Conference on Communication Technology Pub Date : 2010-11-01 DOI: 10.1109/ICCT.2010.5688676
Lihua Yang, Bingke Yang, Guangliang Ren, Z. Qiu
{"title":"Improved STBC transmit diversity scheme in high speed mobile environment","authors":"Lihua Yang, Bingke Yang, Guangliang Ren, Z. Qiu","doi":"10.1109/ICCT.2010.5688676","DOIUrl":"https://doi.org/10.1109/ICCT.2010.5688676","url":null,"abstract":"The effect of the fast time varying channel on Almouti space-time block coding (STBC) scheme is analyzed in high speed mobile environment, and an improved scheme is proposed. Simulation results show that performance of the proposed method is much better than that of the Almouti STBC scheme when the vehicle speed is greater than 350 km/h.","PeriodicalId":253478,"journal":{"name":"2010 IEEE 12th International Conference on Communication Technology","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117125818","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
The effect of imperfect carrier synchronization on the performance of multi-tone DSSS 载波不完全同步对多音DSSS性能的影响
2010 IEEE 12th International Conference on Communication Technology Pub Date : 2010-11-01 DOI: 10.1109/ICCT.2010.5688943
Xin He, Xiaolin Zhang, Bin Yang
{"title":"The effect of imperfect carrier synchronization on the performance of multi-tone DSSS","authors":"Xin He, Xiaolin Zhang, Bin Yang","doi":"10.1109/ICCT.2010.5688943","DOIUrl":"https://doi.org/10.1109/ICCT.2010.5688943","url":null,"abstract":"Compared with single-carrier DSSS, multi-tone DSSS (MT) obtains larger processing gain with equal spectrum efficiency, but it is more sensitive to imperfect carrier synchronization due to much spectral overlap on non-orthogonal subcarriers. In this paper, the carrier synchronization errors of MT system, including frequency offset and phase noise, were modeled as slowly varying Gaussian random processes with little variance. The coherent decision statistics and bit error rate (BER) were theoretically derived with imperfect carrier synchronization, which were verified by numerical simulations. The results show that, in the presence of synchronization errors, the BER performance of MT with same spreading codes on subcarriers is not determined by processing gain, while for different code case the performance could be improved since inter-subcarrier interference is suppressed by larger processing gain at the cost of bandwidth efficiency.","PeriodicalId":253478,"journal":{"name":"2010 IEEE 12th International Conference on Communication Technology","volume":"164 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115845627","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: 2
LHDV-HOP: An energy-effective range-free localization scheme in wireless sensor networks LHDV-HOP:一种无线传感器网络中节能的无距离定位方案
2010 IEEE 12th International Conference on Communication Technology Pub Date : 2010-11-01 DOI: 10.1109/ICCT.2010.5688808
Yufeng Wang, Yuguan Lian, A. Nakao
{"title":"LHDV-HOP: An energy-effective range-free localization scheme in wireless sensor networks","authors":"Yufeng Wang, Yuguan Lian, A. Nakao","doi":"10.1109/ICCT.2010.5688808","DOIUrl":"https://doi.org/10.1109/ICCT.2010.5688808","url":null,"abstract":"Localization has been identified as one of key issues in Wireless Sensor Network (WSN). The widely used localization technique is range-free algorithm, especially DV-HOP (Distance Vector Hop) algorithm. But the traditional DV-HOP has the following drawback: the large communications overhead wastes the nodes' valuable energy, and limits the whole sensor network's lifetime and scalability. To solve the above problem, LHDV-HOP (DV-HOP of Limited Hops) is proposed in this paper, in which a hop threshold, N is set to limit the flooding range, and furthermore, three anchor nodes with the best precision for localization are chosen among all anchors within the N hops, as reference points. Simulation results show that LHDV-HOP can decrease the energy consumption, and meanwhile, improve the localization accuracy.","PeriodicalId":253478,"journal":{"name":"2010 IEEE 12th International Conference on Communication Technology","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115389672","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: 5
A Zone-based Routing Protocol with Parallel Collision Guidance Broadcasting for MANET 基于并行碰撞引导广播的区域路由协议
2010 IEEE 12th International Conference on Communication Technology Pub Date : 2010-11-01 DOI: 10.1109/ICCT.2010.5689125
S. Basurra, Marina De Vos, J. Padget, T. Lewis, S. Armour
{"title":"A Zone-based Routing Protocol with Parallel Collision Guidance Broadcasting for MANET","authors":"S. Basurra, Marina De Vos, J. Padget, T. Lewis, S. Armour","doi":"10.1109/ICCT.2010.5689125","DOIUrl":"https://doi.org/10.1109/ICCT.2010.5689125","url":null,"abstract":"In mobile ad-hoc networks (MANET), broadcasting is used intensively for path discovery. Minimizing redundant rebroadcasts and time latency during re-broadcast can considerably improve network performance and node connectivity. In this paper we propose a Zone-based Routing Protocol with Parallel Collision Guidance Broadcasting (ZCG) for MANET. The network is divided into contiguous zones lead by the most reliable and capable nodes, called zone leaders, that are identified by a zone construction protocol. Routing is established using a new parallel collision guidance broadcasting technique which is initiated by the zone leaders for routing within and between zones. Through simulation results we demonstrate that ZCG provides fast routing and a reduction in control overheads in comparison with a typical reactive routing protocol (AODV).","PeriodicalId":253478,"journal":{"name":"2010 IEEE 12th International Conference on Communication Technology","volume":"65 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123136261","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
Application-Layer FEC for file delivery over the WiMAX unicast networks 用于在WiMAX单播网络上传输文件的应用层FEC
2010 IEEE 12th International Conference on Communication Technology Pub Date : 2010-11-01 DOI: 10.1109/ICCT.2010.5688502
Hsin-Ta Chiao, Kuan-Ming Li, Hung-Min Sun, Shih-Ying Chang, Hsin-An Hou
{"title":"Application-Layer FEC for file delivery over the WiMAX unicast networks","authors":"Hsin-Ta Chiao, Kuan-Ming Li, Hung-Min Sun, Shih-Ying Chang, Hsin-An Hou","doi":"10.1109/ICCT.2010.5688502","DOIUrl":"https://doi.org/10.1109/ICCT.2010.5688502","url":null,"abstract":"FLUTE is a file delivery protocol whose operation can only require a unidirectional communication channel from a sender to a receiver. Due to the nature of unidirectional delivery, FLUTE is designed in a flexible way so that it can cooperate with different kinds of forward error correction codes in application layer, such as systematic Raptor codes or other FEC codes defined in IETF. Besides, since FLUTE is a generic IP-based file delivery protocol, it is already applied for multicast-based file distribution in IP-based mobile TV standards such as DVB-IPDC and OMA BCAST. In addition, the FLUTE protocol can also be applied for long haul, multi-hop file delivery in an IP-based intranet. In this paper, we describe the experience of using the FLUTE protocol for file delivery over a WiMAX unicast network and show the performance gain of employing a systematic Raptor code as the application layer FEC for FLUTE.","PeriodicalId":253478,"journal":{"name":"2010 IEEE 12th International Conference on Communication Technology","volume":"325 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123308859","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
Dynamic channel switching for downlink relay-aided OFDMA systems 下行中继辅助OFDMA系统的动态信道切换
2010 IEEE 12th International Conference on Communication Technology Pub Date : 2010-11-01 DOI: 10.1109/ICCT.2010.5689163
B. Da, Rui Zhang, C. Ko
{"title":"Dynamic channel switching for downlink relay-aided OFDMA systems","authors":"B. Da, Rui Zhang, C. Ko","doi":"10.1109/ICCT.2010.5689163","DOIUrl":"https://doi.org/10.1109/ICCT.2010.5689163","url":null,"abstract":"A relay-aided OFDMA system model with dynamic channel switching is introduced in this paper. Specifically, this model allows each user to communicate with the base station either through direct path or relaying path. The investigated problem is formulated as maximizing system capacity with joint consideration of power distribution, subcarrier selection in direct path and subcarrier paring in relaying path. Also, the optimal criterion of selecting these two operating modes is analyzed. A low complexity algorithm is then proposed for allocating radio resources, and the performance is verified by some simulations results. It can be shown that the use of relaying does not always give better performance than only adopting direct path and an appropriate switching mechanism between direct and relaying modes can give much performance improvement.","PeriodicalId":253478,"journal":{"name":"2010 IEEE 12th International Conference on Communication Technology","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123517023","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
Flat frequency comb generation based on Mach-Zehnder modulator and phase modulator 基于马赫-曾德尔调制器和相位调制器的平频梳生成
2010 IEEE 12th International Conference on Communication Technology Pub Date : 2010-11-01 DOI: 10.1109/ICCT.2010.5689278
Lin Zhang, Yingxiong Song, S. Zou, Yingchun Li, Jiajun Ye, R. Lin
{"title":"Flat frequency comb generation based on Mach-Zehnder modulator and phase modulator","authors":"Lin Zhang, Yingxiong Song, S. Zou, Yingchun Li, Jiajun Ye, R. Lin","doi":"10.1109/ICCT.2010.5689278","DOIUrl":"https://doi.org/10.1109/ICCT.2010.5689278","url":null,"abstract":"A method to generate flat optical frequency comb is proposed and demonstrated which is based on Mach-Zehnder modulator and phase modulator cascade. Utilizing this method, we have analyzed flat optical frequency comb generation in the condition of different RF driving voltages. We also illustrate and correct the optimal operation condition for generating flat optical comb lines through the modulators.","PeriodicalId":253478,"journal":{"name":"2010 IEEE 12th International Conference on Communication Technology","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121749950","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: 11
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