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2009 Canadian Conference on Electrical and Computer Engineering最新文献

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On the second-order cyclostationarity for joint signal detection and classification in cognitive radio systems 认知无线电系统中联合信号检测与分类的二阶循环平稳性
2009 Canadian Conference on Electrical and Computer Engineering Pub Date : 2009-05-03 DOI: 10.1109/CCECE.2009.5090121
Qiyun Zhang, O. Dobre, S. Rajan, R. Inkol
{"title":"On the second-order cyclostationarity for joint signal detection and classification in cognitive radio systems","authors":"Qiyun Zhang, O. Dobre, S. Rajan, R. Inkol","doi":"10.1109/CCECE.2009.5090121","DOIUrl":"https://doi.org/10.1109/CCECE.2009.5090121","url":null,"abstract":"Spectrum awareness is a crucial aspect of a cognitive radio (CR). The CR concept of dynamically sensing and adapting to the radio frequency environment depends on the ability to perform reliable joint signal detection and classification at low signal-to-noise ratios (SNRs) given relaxed a priori information. This paper proposes a joint detection and classification algorithm for single-carrier linearly digitally modulated (SCLD), cyclically prefixed SCLD (CP-SCLD), and orthogonal frequency division multiplexing (OFDM) signals, which does not require estimation of signal and noise powers, symbol timing, and carrier and waveform recovery.","PeriodicalId":153464,"journal":{"name":"2009 Canadian Conference on Electrical and Computer Engineering","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130738770","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: 15
Power allocation strategy for MIMO system based on beam-nulling 基于波束零化的MIMO系统功率分配策略
2009 Canadian Conference on Electrical and Computer Engineering Pub Date : 2009-05-03 DOI: 10.1109/CCECE.2009.5090230
M. Gheryani, Zhiyuan Wu, Y. Shayan
{"title":"Power allocation strategy for MIMO system based on beam-nulling","authors":"M. Gheryani, Zhiyuan Wu, Y. Shayan","doi":"10.1109/CCECE.2009.5090230","DOIUrl":"https://doi.org/10.1109/CCECE.2009.5090230","url":null,"abstract":"In this paper, we propose a scheme called “beam-nulling” using the same feedback bandwidth as beamforming but with higher capacity. In the beam-nulling scheme, the eigenvector of the weakest subchannel is fed back and then signals are sent over a generated subspace orthogonal to the weakest subchannel. Hence, the scheme can achieve high capacity. The capacities of water-filling, equal power, beamforming and beam-nulling are compared through theoretical analysis and numerical results. It is shown that at medium signal-to-noise ratio, beam-nulling approaches the optimal waterfilling scheme. Additionally, the existing beamforming and new proposed beam-nulling can be extended if more than one eigenvector is available at the transmitter. The new extended schemes are called multi-dimensional (MD) beamforming and MD beam-nulling. Theoretical analysis and numerical results in terms of capacity are also provided to evaluate the new extended schemes.","PeriodicalId":153464,"journal":{"name":"2009 Canadian Conference on Electrical and Computer Engineering","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116844691","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
Signal construction for high-speed access over copper wiring 通过铜线高速接入的信号结构
2009 Canadian Conference on Electrical and Computer Engineering Pub Date : 2009-05-03 DOI: 10.1109/CCECE.2009.5090089
A. Enteshari, M. Kavehrad, J. Fadlullah
{"title":"Signal construction for high-speed access over copper wiring","authors":"A. Enteshari, M. Kavehrad, J. Fadlullah","doi":"10.1109/CCECE.2009.5090089","DOIUrl":"https://doi.org/10.1109/CCECE.2009.5090089","url":null,"abstract":"In this paper, we present signal construction for the future IEEE 40GBASE-T standard. The LDPC assisted coded modulation and demodulation is presented. A code achieving 6dB gain, which is literally high enough to satisfy reliability constraints for data transmission at a rate of 40 Gbps over 50m Cat-7A (class FA) copper cable, is designed and the simulation results are presented. The main objective of the presented work is to extensively reduce the power and implementation complexities of a 40GBASE-T system.","PeriodicalId":153464,"journal":{"name":"2009 Canadian Conference on Electrical and Computer Engineering","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128077807","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
Development of an efficient IGBT simulation model 高效IGBT仿真模型的开发
2009 Canadian Conference on Electrical and Computer Engineering Pub Date : 2009-05-03 DOI: 10.1109/CCECE.2009.5090131
L. Michel, A. Chériti, P. Sicard
{"title":"Development of an efficient IGBT simulation model","authors":"L. Michel, A. Chériti, P. Sicard","doi":"10.1109/CCECE.2009.5090131","DOIUrl":"https://doi.org/10.1109/CCECE.2009.5090131","url":null,"abstract":"We propose, in this paper, the development of an efficient IGBT model especially designed for simulation and the associated free wheeling diode model that can describe the recovery current. Although, the IGBT model can describe the switching mechanism with a good precision, a procedure is presented in order to make this model able to reproduce better switching losses. Both models have the advantage to be configured exclusively from the datasheets and are built as electrical circuits, which can be realized easily in classical simulators.","PeriodicalId":153464,"journal":{"name":"2009 Canadian Conference on Electrical and Computer Engineering","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134404334","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: 10
An optimized sensorless MPPT method for PV generation system 光伏发电系统无传感器MPPT优化方法
2009 Canadian Conference on Electrical and Computer Engineering Pub Date : 2009-05-03 DOI: 10.1109/CCECE.2009.5090224
Sang-Soo Park, Amit K. Jinda, A. Gole, Minwon Park, I. Yu
{"title":"An optimized sensorless MPPT method for PV generation system","authors":"Sang-Soo Park, Amit K. Jinda, A. Gole, Minwon Park, I. Yu","doi":"10.1109/CCECE.2009.5090224","DOIUrl":"https://doi.org/10.1109/CCECE.2009.5090224","url":null,"abstract":"This paper describes a sensorless MPPT technique for PV generation system. A DC-DC converter has been used to step-up or step-down the PV voltage. Optimization technique has been implemented to optimize the current and voltage controller gain parameters. PSCAD/EMTDC simulation results revealed that the proposed control has better response.","PeriodicalId":153464,"journal":{"name":"2009 Canadian Conference on Electrical and Computer Engineering","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132976117","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
Discriminative SIFT features for face recognition 判别SIFT特征用于人脸识别
2009 Canadian Conference on Electrical and Computer Engineering Pub Date : 2009-05-03 DOI: 10.1109/CCECE.2009.5090085
A. Majumdar, R. Ward
{"title":"Discriminative SIFT features for face recognition","authors":"A. Majumdar, R. Ward","doi":"10.1109/CCECE.2009.5090085","DOIUrl":"https://doi.org/10.1109/CCECE.2009.5090085","url":null,"abstract":"SIFT (Scale Invariant Feature Transform) features are widely used in object recognition. These features are invariant to changes in scale, 2D translation and rotation transformations. To a limited extent they are also robust to 3D projection transformations. SIFT Features however, are of very high dimension and large number of SIFT features are generated from an image. The large computational effort associated with matching all the SIFT features for recognition tasks, limits its application to face recognition problems. In this work we propose a discriminative ranking of SIFT features that can be used to prune the number of SIFT features for face recognition. Our method checks the number of irrelevant features to be matched thereby reducing the computational complexity. In the process it also increases the recognition accuracy. We show that the reduction in the number of computations is more than 4 times and increase in the recognition accuracy is 1% on average. Experimental results confirm that our proposed recognition method is robust to changes in head pose, illumination, facial expression and partial occlusion.","PeriodicalId":153464,"journal":{"name":"2009 Canadian Conference on Electrical and Computer Engineering","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133456122","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: 51
Toward a general control design paradigm for hybrid systems: Ideas, concepts, and formulations 迈向混合系统的一般控制设计范例:想法、概念和公式
2009 Canadian Conference on Electrical and Computer Engineering Pub Date : 2009-05-03 DOI: 10.1109/CCECE.2009.5090307
Mehdi Fatemi, J. Millan, Tina Yu, S. O'Young
{"title":"Toward a general control design paradigm for hybrid systems: Ideas, concepts, and formulations","authors":"Mehdi Fatemi, J. Millan, Tina Yu, S. O'Young","doi":"10.1109/CCECE.2009.5090307","DOIUrl":"https://doi.org/10.1109/CCECE.2009.5090307","url":null,"abstract":"This paper sheds light on the concepts of decision making and optimal control in the supervisory control of hybrid systems. Here, “decision-making” is defined as “priority-setting,” meaning that we construct a priority mapping that is allowed to be defined from both policies and the system's physical limitations. At the run time, the supervisory control of any hybrid system results in a set of possible transitions for the current state from which one should be picked. However, the set may consist of more than one transition at the highest priority. In such a case, hybrid optimal control is defined to be applied. Therefore, the purpose of this paper is to highlight these stages of specification to be implemented through a novel multi-layer framework for the execution and control of hybrid systems.","PeriodicalId":153464,"journal":{"name":"2009 Canadian Conference on Electrical and Computer Engineering","volume":"225 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116316091","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
Partner selection strategy for users with high speed in cooperative diversity systems 合作分集系统中高速用户伙伴选择策略
2009 Canadian Conference on Electrical and Computer Engineering Pub Date : 2009-05-03 DOI: 10.1109/CCECE.2009.5090249
Jing-ning Wang, X. Sha, Wei-dang Lu, Zhongzhao Zhang
{"title":"Partner selection strategy for users with high speed in cooperative diversity systems","authors":"Jing-ning Wang, X. Sha, Wei-dang Lu, Zhongzhao Zhang","doi":"10.1109/CCECE.2009.5090249","DOIUrl":"https://doi.org/10.1109/CCECE.2009.5090249","url":null,"abstract":"Cooperative diversity has been adopted to form virtual antenna arrays in order to obtain spatial diversity gains. Various partner selection methods in cooperative diversity systems were proposed and analyzed. However, these methods are not effective for users with high speed, such as users in cars on high way. A novel partner selection strategy is presented in this paper by dividing users into three groups according to their moving speeds and directions if there are any high speed users in a certain cell. The partners for cooperation are selected from the same group with the source user. Simulation results show that the selection strategy can increase duration of cooperation, as well as decrease the partner handoff times and probability of unsuccessful partner selection.","PeriodicalId":153464,"journal":{"name":"2009 Canadian Conference on Electrical and Computer Engineering","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116921690","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
Orthogonal hermite functions based orthogonal pulse shaping method 基于正交埃尔米特函数的正交脉冲整形方法
2009 Canadian Conference on Electrical and Computer Engineering Pub Date : 2009-05-03 DOI: 10.1109/CCECE.2009.5090184
Xuanli Wu, Xin Qiu, Xiaoyan Ning, Di Lin
{"title":"Orthogonal hermite functions based orthogonal pulse shaping method","authors":"Xuanli Wu, Xin Qiu, Xiaoyan Ning, Di Lin","doi":"10.1109/CCECE.2009.5090184","DOIUrl":"https://doi.org/10.1109/CCECE.2009.5090184","url":null,"abstract":"Ultra-Wideband (UWB) communication has attracted more attentions due to its advantages in short range applications. As one of the key techniques in UWB systems, many pulse shaping methods have been proposed. The semi-definite programming (SDP) based pulse shaping method can obtain the pulse with highest power efficiency by far. However, an accurate timing of 40ps is required, and such requirement cannot be implemented precisely using modern hardware. Furthermore, the power efficiency of the second orthogonal pulse will be lower than the first pulse. To solve such problems, the linear combination of orthogonal Hermite functions is used in the SDP method and a modification method is then proposed to eliminate the direct current (DC) component. Simulation results show that orthogonal pulses without DC component can be obtained and the power efficiency of the obtained pulses are more than 80%. Moreover, the obtained orthogonal pulses will have shorter pulse duration due to the energy concentration property of orthogonal spaces.","PeriodicalId":153464,"journal":{"name":"2009 Canadian Conference on Electrical and Computer Engineering","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116657582","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
Dynamic leakage aware power management with procrastination method 基于延迟方法的动态泄漏感知电源管理
2009 Canadian Conference on Electrical and Computer Engineering Pub Date : 2009-05-03 DOI: 10.1109/CCECE.2009.5090130
Yongwen Pan, Man Lin
{"title":"Dynamic leakage aware power management with procrastination method","authors":"Yongwen Pan, Man Lin","doi":"10.1109/CCECE.2009.5090130","DOIUrl":"https://doi.org/10.1109/CCECE.2009.5090130","url":null,"abstract":"Power management is an important factor during the design of real-time systems. Dynamic voltage scaling is an effective technique to reduce dynamic power consumption. With the higher density of processors, the leakage power consumption can not be ignored, which makes power management more complicated. Power shutdown and procrastination method can be used to reduce static power consumption due to leakage current efficiently. A dynamic leakage aware power management algorithm with procrastination for job-level periodic task set using EDF policy is developed. Experimental results show that it derives a good energy performance.","PeriodicalId":153464,"journal":{"name":"2009 Canadian Conference on Electrical and Computer Engineering","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116761028","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
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