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2007 Canadian Conference on Electrical and Computer Engineering最新文献

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Narrowband Interference Elimination in UWB Communications Systems 超宽带通信系统中的窄带干扰消除
2007 Canadian Conference on Electrical and Computer Engineering Pub Date : 2007-04-22 DOI: 10.1109/CCECE.2007.338
H. Quach, A. Dinh
{"title":"Narrowband Interference Elimination in UWB Communications Systems","authors":"H. Quach, A. Dinh","doi":"10.1109/CCECE.2007.338","DOIUrl":"https://doi.org/10.1109/CCECE.2007.338","url":null,"abstract":"This paper proposes a narrowband interference cancellation for UWB communication systems. The cancellation unit estimates and generates the interferer then eliminates it by subtracting to a delay version of the UWB signal. This mitigation technique provides a gain between 3 dB to 5 dB in multipath environment with the presence of a single ODFM WLAN interferer.","PeriodicalId":183910,"journal":{"name":"2007 Canadian Conference on Electrical and Computer Engineering","volume":"574 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115033882","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
Concurrent Oscillators For Multi-Band Multi-Mode Wireless Communication Systems 多波段多模式无线通信系统的并发振荡器
2007 Canadian Conference on Electrical and Computer Engineering Pub Date : 2007-04-22 DOI: 10.1109/CCECE.2007.173
U. Rohde, A. Poddar
{"title":"Concurrent Oscillators For Multi-Band Multi-Mode Wireless Communication Systems","authors":"U. Rohde, A. Poddar","doi":"10.1109/CCECE.2007.173","DOIUrl":"https://doi.org/10.1109/CCECE.2007.173","url":null,"abstract":"This paper presents the design approach of RCO (reconfigurable concurrent oscillator) that simultaneously generates two or more signals of different frequencies that eliminate the need of lossy switches for switching the frequency band, thereby improves the system throughput. The measured phase noise for band#1 (2.3-2.6 GHz) and band#2 (4.6-5.2 GHz) are typically -140 dBc/Hz, and -120 dBc/Hz at 100 kHz offset from the carrier respectively; and to our knowledge, this is the best phase noise performance for this class of VCO (voltage controlled oscillators) by using nth-order MCPR (multi-coupled planar resonators) so far reported (n=4 for dual mode).","PeriodicalId":183910,"journal":{"name":"2007 Canadian Conference on Electrical and Computer Engineering","volume":"184 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114158722","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
A Compact and Accurate FPGA Based Nonisotropic Fading Channel Simulator 基于FPGA的非各向同性衰落信道模拟器
2007 Canadian Conference on Electrical and Computer Engineering Pub Date : 2007-04-22 DOI: 10.1109/CCECE.2007.316
S. F. Fard, A. Alimohammad, M. Khorasani, C. Schlegel, B. Cockburn
{"title":"A Compact and Accurate FPGA Based Nonisotropic Fading Channel Simulator","authors":"S. F. Fard, A. Alimohammad, M. Khorasani, C. Schlegel, B. Cockburn","doi":"10.1109/CCECE.2007.316","DOIUrl":"https://doi.org/10.1109/CCECE.2007.316","url":null,"abstract":"A novel design and implementation technique for generating Rayleigh fading variates is presented in this paper. An FPGA implementation of the new baseband fading simulator utilizes only 6.8% of the configurable slices and generates 10 million statistically accurate samples per second. Increasing the output sample rate to up to 300 million samples per second is possible with a slight increase in the resource utilization. A wide variety of channel characteristics and sample rates can be achieved with parameterizing the new baseband channel simulator.","PeriodicalId":183910,"journal":{"name":"2007 Canadian Conference on Electrical and Computer Engineering","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114618025","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
Enhanced Accuracy in Registration of Cortex Functional Data via Large-Deformation Differomorphic Maps 利用大变形差胚图提高皮质功能数据配准精度
2007 Canadian Conference on Electrical and Computer Engineering Pub Date : 2007-04-22 DOI: 10.1109/CCECE.2007.294
B. N. Makouei, Lei E. Wang, M. Beg
{"title":"Enhanced Accuracy in Registration of Cortex Functional Data via Large-Deformation Differomorphic Maps","authors":"B. N. Makouei, Lei E. Wang, M. Beg","doi":"10.1109/CCECE.2007.294","DOIUrl":"https://doi.org/10.1109/CCECE.2007.294","url":null,"abstract":"The complex folding pattern of the cerebral cortex has presented a major obstacle for functional MRI studies. The considerable variability in the folding structure of the cortex virtually prevents all low-dimensional registration methods from giving accurate normalization in this area. On the other hand, growing research on localizing the human neurological behavior on cortex, and the need for mapping the subjects into a standard coordinate space before performing statistical analysis, calls for more accurate mapping and registration methods. In this paper we present our approach of using the FreeSurfer software package together with the large deformation differomorphic metric maps (LDDMM) to first automatically segment the Cortex using the former and then compute accurate differomorphic mappings between each subject and the selected template's brain using the latter. We present a comparison of the accuracy of our approach with the mapping algorithm implemented in the SPM software package using a synthetic FMRI data-set.","PeriodicalId":183910,"journal":{"name":"2007 Canadian Conference on Electrical and Computer Engineering","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114843317","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
Intelligent-Agent and Web-Service Based Service Composition for E-Business 基于智能代理和web服务的电子商务服务组合
2007 Canadian Conference on Electrical and Computer Engineering Pub Date : 2007-04-22 DOI: 10.1109/CCECE.2007.215
Jing Chi, Junde Song
{"title":"Intelligent-Agent and Web-Service Based Service Composition for E-Business","authors":"Jing Chi, Junde Song","doi":"10.1109/CCECE.2007.215","DOIUrl":"https://doi.org/10.1109/CCECE.2007.215","url":null,"abstract":"This paper proposes a customer-centric, Intelligent-Agent and Web-Service based system to integrate the flexibility, adaptability and autonomy of agents, as well as the interoperability, decentralization and extensibility of Web Services. We apply the service composition concept for e-business to the horizontal service decomposition and business role differentiation. In advance we defined two types of agents for system design: Personal Agent and Generic Agent. Each agent, wrapped as a Web Service, plays the role as a customer or an atomic service provider. And it responses to certain events according to business rules and makes real-time decisions by applying predefined operational strategies. The orchestration of these agents builds an automatic e-business with features of flexible cooperation, initiative reactivity, and intelligent decisionmaking. It will bring the benefits of increased service efficiency and reduced service complexity to e-business.","PeriodicalId":183910,"journal":{"name":"2007 Canadian Conference on Electrical and Computer Engineering","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115749914","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: 9
Development of a Fuzzy-Based Sit-to-Stand Controller 基于模糊的坐立控制器的研制
2007 Canadian Conference on Electrical and Computer Engineering Pub Date : 2007-04-22 DOI: 10.1109/CCECE.2007.408
R. Prinz, S. Neville, N. Livingston
{"title":"Development of a Fuzzy-Based Sit-to-Stand Controller","authors":"R. Prinz, S. Neville, N. Livingston","doi":"10.1109/CCECE.2007.408","DOIUrl":"https://doi.org/10.1109/CCECE.2007.408","url":null,"abstract":"Rising from a seated position is one of the most mechanically demanding tasks undertaken during daily activities, and for individuals with a mobility impairment, it can be an impossible one. For decades, traditional orthoses (i.e., braces) have been used to restrict undesired motion. With the advent of powered orthoses, came the ability to not only restrict undesired motion, but also to actively promote proper posture and movement. This work presents a fuzzy-based controller designed to guide the wearer of a powered orthosis through the sit-to-stand (STS) movement. Simulations are presented for two variations of the momentum-transfer STS strategy. Simulation results are also presented for balance recovery scenarios.","PeriodicalId":183910,"journal":{"name":"2007 Canadian Conference on Electrical and Computer Engineering","volume":"1617 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123374629","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
Multiuser Detection in DS-CDMA Using Hybrid Evolutionary Strategy 基于混合进化策略的DS-CDMA多用户检测
2007 Canadian Conference on Electrical and Computer Engineering Pub Date : 2007-04-22 DOI: 10.1109/CCECE.2007.156
Mehtaz Sharmin, C. Tellambura
{"title":"Multiuser Detection in DS-CDMA Using Hybrid Evolutionary Strategy","authors":"Mehtaz Sharmin, C. Tellambura","doi":"10.1109/CCECE.2007.156","DOIUrl":"https://doi.org/10.1109/CCECE.2007.156","url":null,"abstract":"A hybrid Evolutionary Algorithm is presented in this paper for multiuser detection in a synchronous direct sequence code-division multiple access (DS-CDMA) system, which explores the application of Evolutionary algorithm (EA). The algorithm employs a (1 + lambda) Evolutionary Strategy (ES) for the basic search, which directs the search process towards an elitist solution space. A simple 1-opt local search is applied for thorough search in the elitist region. Simulation results demonstrate the efficacy of the proposed algorithm as this approach offers near optimal bit-error rate (BER) performance with lower computational complexity compared to the maximum-likelihood (ML) detector for a large number of users.","PeriodicalId":183910,"journal":{"name":"2007 Canadian Conference on Electrical and Computer Engineering","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124745759","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
Fast Power Estimation for Automatic Instruction-Set Selection 指令集自动选择的快速功率估计
2007 Canadian Conference on Electrical and Computer Engineering Pub Date : 2007-04-22 DOI: 10.1109/CCECE.2007.133
P. Hallschmid, D. Yeager, R. Saleh
{"title":"Fast Power Estimation for Automatic Instruction-Set Selection","authors":"P. Hallschmid, D. Yeager, R. Saleh","doi":"10.1109/CCECE.2007.133","DOIUrl":"https://doi.org/10.1109/CCECE.2007.133","url":null,"abstract":"Recent research in the area of application specific instruction-set processors (ASIPs) has focused on the automatic selection of a custom instruction-set based on a high-level description of the application. Automatic instruction-set selection is typically comprised of instruction selection and instruction enumeration. During instruction enumeration, candidate instructions are identified using a simple cost function that minimizes the total number of operations in each basic block of the application while also adhering to the micro-architectural constraints of the ASIP. Existing methods indirectly account for power by using the above mentioned cost function and relying on the assumption that fewer operations will always reduce power. This approach is generally taken because power estimation is time-consuming. In this paper, we directly estimate the power dissipation of a custom instruction by using a simple yet effective probabilistic approach based on probability distributions of the input Hamming distance. Results indicate that our approach can estimate the power dissipation incurred by a custom instruction to within 12% of the value reported by PrimePower.","PeriodicalId":183910,"journal":{"name":"2007 Canadian Conference on Electrical and Computer Engineering","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124780897","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
Characterization of Distortion Reduction for Single-Phase Multiple Inverter Operation 单相多逆变器工作的失真抑制特性
2007 Canadian Conference on Electrical and Computer Engineering Pub Date : 2007-04-22 DOI: 10.1109/CCECE.2007.183
H. Bierk, E. Nowicki, A. Al-Judi
{"title":"Characterization of Distortion Reduction for Single-Phase Multiple Inverter Operation","authors":"H. Bierk, E. Nowicki, A. Al-Judi","doi":"10.1109/CCECE.2007.183","DOIUrl":"https://doi.org/10.1109/CCECE.2007.183","url":null,"abstract":"A technique for reducing the total harmonic distortion in the voltage output of naturally sampled pulse width modulated inverters is investigated. This technique is based on synchronization of parallel-connected inverters and makes use of a phase-shift in transistor gating between these inverters. Often, in practice parallel inverters are operated with no synchronization, resulting in far less than optimal harmonic distortion reduction. The output waveform of a single inverter, two parallel inverters, and three parallel inverters is analyzed and compared in simulation and experimentally. This is done for two and three level pulse width modulation, for several values of modulation index, and different carrier to fundamental frequency ratios. Both simulation and experimental results indicate that a significant reduction in total harmonic distortion occurs using the synchronization technique, and observations are provided on the ability to reduce harmonic distortion in multiple inverter systems.","PeriodicalId":183910,"journal":{"name":"2007 Canadian Conference on Electrical and Computer Engineering","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122582895","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
Modified Linear Discriminant Analysis for Speech Recognition 基于改进线性判别分析的语音识别
2007 Canadian Conference on Electrical and Computer Engineering Pub Date : 2007-04-22 DOI: 10.1109/CCECE.2007.400
Xiao-Bing Li, D. O'Shaughnessy
{"title":"Modified Linear Discriminant Analysis for Speech Recognition","authors":"Xiao-Bing Li, D. O'Shaughnessy","doi":"10.1109/CCECE.2007.400","DOIUrl":"https://doi.org/10.1109/CCECE.2007.400","url":null,"abstract":"In this paper, a new method for extracting discriminant features in automatic speech recognition (ASR), termed modified linear discriminant analysis (MLDA), is proposed. As a generalization of linear discriminant analysis (LDA), MLDA integrates the cluster information in each class by redefining the between-class scatter matrix based on the fact that many clusters exist in each state in hidden Markov model (HMM)-based ASR. Experimental results on TiDigits show that our presented MLDA clearly outperforms LDA and clustering-based linear discriminant analysis (CLDA), which was proposed for facial expression recognition, and about a 10% string error rate reduction (SERR) is found.","PeriodicalId":183910,"journal":{"name":"2007 Canadian Conference on Electrical and Computer Engineering","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123990875","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
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