2010 International Conference on Wireless Communications & Signal Processing (WCSP)最新文献_第6页

Fast multichannel spectrum scanning with multiple simultaneous observations 快速多通道频谱扫描与多个同时观察

2010 International Conference on Wireless Communications & Signal Processing (WCSP) Pub Date : 2010-11-11 DOI: 10.1109/WCSP.2010.5634039

Raied Caromi, Yan Xin, L. Lai

{"title":"Fast multichannel spectrum scanning with multiple simultaneous observations","authors":"Raied Caromi, Yan Xin, L. Lai","doi":"10.1109/WCSP.2010.5634039","DOIUrl":"https://doi.org/10.1109/WCSP.2010.5634039","url":null,"abstract":"This paper considers the problem of how to quickly and accurately scan a multichannel spectrum to determine the availability of each channel for a secondary user in a cognitive radio network. The secondary user is able to simultaneously observe more than one channel. We consider a sequential decision setup. After taking each sample, the secondary user should decide either to stop or continue scanning. If the secondary user decides to stop scanning, it then needs to make decisions on the busy/idle status of each channel. If the secondary user decides to continue scanning, it then needs to select a subset of the channels to sense. Two scenarios are investigated. In the first scenario, there is a strict delay constraint on the scanning process. That is, the spectrum scanning needs to be completed within a certain period of time. In the second scenario, there is no strict delay constraint. That is, the spectrum scanning continues until the completion of the detection process. In both scenarios, optimal algorithms for multichannel scanning with multiple simultaneous observations are developed to minimize a cost function that strikes a balance between detection error probabilities and detection delay. Low-complexity approximation schemes are also developed to reduce the complexity of the optimal schemes. Simulation examples are provided to illustrate the effectiveness of the proposed algorithms.","PeriodicalId":448094,"journal":{"name":"2010 International Conference on Wireless Communications & Signal Processing (WCSP)","volume":"190 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124285544","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

Adapting dynamically neighbourhood table entry lifetime in wireless sensor networks 动态适应无线传感器网络邻域表生存期

2010 International Conference on Wireless Communications & Signal Processing (WCSP) Pub Date : 2010-11-11 DOI: 10.1109/WCSP.2010.5633707

A. Ahmad-Kassem, Nathalie Mitten

引用次数: 6

A simulated method of modeling wireless channel based on CDL 一种基于CDL的无线信道建模仿真方法

2010 International Conference on Wireless Communications & Signal Processing (WCSP) Pub Date : 2010-11-11 DOI: 10.1109/WCSP.2010.5633447

Jinbao Zhang, Zaichen Zhang, Xiaoyan Wang, Z. Tan, Q. Guo

{"title":"A simulated method of modeling wireless channel based on CDL","authors":"Jinbao Zhang, Zaichen Zhang, Xiaoyan Wang, Z. Tan, Q. Guo","doi":"10.1109/WCSP.2010.5633447","DOIUrl":"https://doi.org/10.1109/WCSP.2010.5633447","url":null,"abstract":"Rapid development of wireless communications gives prominence to simulation. Simulated methods of modeling wireless channel are of significance to wireless communications simulation on both link and system levels. There have been quite a lot of theoretical models which have accurately described the characteristics of wireless channel. However when it comes to the realization of wireless channel in simulation, there seem no accurate enough methods and conclusions. Current simulated methods are mostly built up based on TDL, which is a common framework to model micro fading and mainly focused on micro fading. As to macro fading, Doppler-effect and polarization of electromagnetic wave, this method behaves not well enough, and other statistical approximations is indispensable, such as shadow fading, Doppler power spectrum density and so on. To the question existed, this paper proposes a simulated method to accurately model wireless channel under given wireless environment, on the basis of cluster delay line. This method is highlighted with comprehensive consideration of macro and micro fading, Doppler, multi-path and polarization effect. Analysis and simulation results on characteristics of wireless channel such as signal envelope, coherent time and bandwidth, validate the proposed model.","PeriodicalId":448094,"journal":{"name":"2010 International Conference on Wireless Communications & Signal Processing (WCSP)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129606633","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

Approach of linear phase differentiators and integrators 线性相位微分和积分器的方法

2010 International Conference on Wireless Communications & Signal Processing (WCSP) Pub Date : 2010-11-11 DOI: 10.1109/WCSP.2010.5633485

W. Lai, Lin-Chuan Tsai

引用次数: 0

Improvement of ETX metric base on OLSR 基于OLSR的ETX度量改进

2010 International Conference on Wireless Communications & Signal Processing (WCSP) Pub Date : 2010-11-11 DOI: 10.1109/WCSP.2010.5632341

Yang Liu, Zhichao Mi, Jianfeng Zhang, X. Qu

引用次数: 6

Distributed precoding for multicell MIMO networks 多小区MIMO网络的分布式预编码

2010 International Conference on Wireless Communications & Signal Processing (WCSP) Pub Date : 2010-11-11 DOI: 10.1109/WCSP.2010.5633441

Yingquan Zou, Chunguo Li, Luxi Yang

引用次数: 2

Detection scheme for quantum multiple access channel with noisy coherent state 具有噪声相干态的量子多址信道检测方案

2010 International Conference on Wireless Communications & Signal Processing (WCSP) Pub Date : 2010-11-11 DOI: 10.1109/WCSP.2010.5633579

Shengmei Zhao, Feng Gao, Xiaoliang Dong, B. Zheng

引用次数: 0

Distributed power control based on convex optimization in cognitive radio networks 认知无线电网络中基于凸优化的分布式功率控制

2010 International Conference on Wireless Communications & Signal Processing (WCSP) Pub Date : 2010-11-11 DOI: 10.1109/WCSP.2010.5633676

Shunqiao Sun, Jiaxi Di, Weiming Ni

{"title":"Distributed power control based on convex optimization in cognitive radio networks","authors":"Shunqiao Sun, Jiaxi Di, Weiming Ni","doi":"10.1109/WCSP.2010.5633676","DOIUrl":"https://doi.org/10.1109/WCSP.2010.5633676","url":null,"abstract":"We consider the power efficiency optimization problem in the cognitive radio (CR) networks under both the average packet delay constraints of each CR transmitter (CR-Tx) and the interference constraint at primary receiver (PU-Rx). We propose a cooperative approach to make each CR-Tx know the interference level at the PU-Rx when there is no central control node in the network and no assistant sensors are deployed to do the interference measuring jobs. The power control problem is proved to be a convex problem. Since the powers of CR-Tx nodes are coupled in constraints, we apply the Lagrange relaxation of the coupling constraints method and construct the subgradient iterative algorithm to solve the dual problem in a distributed way. To reduce the payload of the message exchange at each iterative process, an improved algorithm is proposed that could be implemented through Lagrange dual decomposition. Numerical results show that the two algorithms can converge very fast. When the delay constraints of CR users are not very small, it is better to apply the improved algorithm which has a good performance but with a much lower complexity.","PeriodicalId":448094,"journal":{"name":"2010 International Conference on Wireless Communications & Signal Processing (WCSP)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116300914","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: 25

Frequency estimation method based on iterative filtering and pulse-pairs 基于迭代滤波和脉冲对的频率估计方法

2010 International Conference on Wireless Communications & Signal Processing (WCSP) Pub Date : 2010-11-11 DOI: 10.1109/WCSP.2010.5633313

He Yishan, Chen Yufan

引用次数: 1

Modeling of the electromagnetic interference map generated by 3G systems inside small aircraft 小型飞机内3G系统产生的电磁干扰图建模

2010 International Conference on Wireless Communications & Signal Processing (WCSP) Pub Date : 2010-11-11 DOI: 10.1109/WCSP.2010.5633528

Clifford De Raffaele, C. J. Debono

{"title":"Modeling of the electromagnetic interference map generated by 3G systems inside small aircraft","authors":"Clifford De Raffaele, C. J. Debono","doi":"10.1109/WCSP.2010.5633528","DOIUrl":"https://doi.org/10.1109/WCSP.2010.5633528","url":null,"abstract":"The substantial increase in customer demand for office-like communication services during flights is pushing aircraft manufactures to implement wireless solutions inside aircraft. Nevertheless, aircraft safety is a paramount criterion for operators, thus the potential risks posed by such communication systems on aircraft equipment must be carefully assessed and respective countermeasures taken. In this work, we adopt a three-dimensional ray tracing method based on geometrical optics and combine it with electromagnetic field computation to model the interference generated by a 3G cellular system inside the cabin of a typical business jet. The model initially develops a propagation map of the electromagnetic (EM) radiation emitted by the Node B station inside the aircraft to determine the power incident on the receiving antennas of personal electronic devices (PEDs). This is used to establish the transmission power employed by each PED. Subsequently similar propagation maps are generated for each mobile device. All the radio space propagation maps are then vectorially combined to produce an EM interference map at the fuselage.","PeriodicalId":448094,"journal":{"name":"2010 International Conference on Wireless Communications & Signal Processing (WCSP)","volume":"142 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126901698","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