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2007 International Conference on Electrical Engineering最新文献

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Comparative Analysis of Scheduling Frameworks for Efficient Wavelength Utilization in WDM EPONs WDM epon中有效利用波长的调度框架比较分析
2007 International Conference on Electrical Engineering Pub Date : 2007-04-11 DOI: 10.1109/ICEE.2007.4287319
A. Rafiq, S. Zaidi, M. Ramzan
{"title":"Comparative Analysis of Scheduling Frameworks for Efficient Wavelength Utilization in WDM EPONs","authors":"A. Rafiq, S. Zaidi, M. Ramzan","doi":"10.1109/ICEE.2007.4287319","DOIUrl":"https://doi.org/10.1109/ICEE.2007.4287319","url":null,"abstract":"While talking about Bandwidth Management for WDM EPONs it is required to be noted that it takes the evolutionary advantage of number of available optical transmission channels that are available in spectrum and explore this problem for the evolutionary up-gradation of WDM EPONs. The problem is the efficient utilization of the wavelengths in a given EPON in a dynamic manner. From the provided and supported optical transmission channels in a given scenario we have to assign a specific channel for upstream traffic by catering the two major subproblems. The subproblems are; grant sizing problem (how long to assign the channel) and grant scheduling problem (when and on which available supported channel we can transmit). Then we discuss different frameworks like online, offline and Just-in-time online scheduling frameworks with the idea of multichannel support We analyze the comparison of the frameworks on the bases of the average queuing delays that are incurred while EPON in operation, and get the idea that JIT online scheduling framework is better than the other two frameworks. Then we discuss some of the different scheduling policies for above mentioned three frameworks that can be used to solve our scheduling problem. In the end it is concluded by an idea of having a more complicated scheduler comparatively than the existing ones for multichannel support as the future direction we should be focused on for the further work. The major objective to achieve is, to design a scheduler for WDM EPON having maximum wavelength utilization and lower queuing delays.","PeriodicalId":291800,"journal":{"name":"2007 International Conference on Electrical Engineering","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132614669","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
Audio Coding with Signal Adaptive Block based Filter Bank Switching 基于信号自适应块的滤波器组切换音频编码
2007 International Conference on Electrical Engineering Pub Date : 2007-04-11 DOI: 10.1109/ICEE.2007.4287362
M. Saleem
{"title":"Audio Coding with Signal Adaptive Block based Filter Bank Switching","authors":"M. Saleem","doi":"10.1109/ICEE.2007.4287362","DOIUrl":"https://doi.org/10.1109/ICEE.2007.4287362","url":null,"abstract":"An improved efficiency perceptual audio codec is presented which analyzes each block of input signal and selects a suitable time/frequency mapping transform for it. The selection is based on statistics of the input signal vis-a-vis energy compaction and resolution power properties of the transforms employed which include the DFT (uniform subbands), DFT (critical subbands), DCT and CELP( for speech only blocks). The performance of the codec is compared with the widely famous MPEG-1 Layer-III algorithm. Efficiency enhancement is indicated by improved grades of subjective listening test for the proposed codec compared to those for MPEG-1 Layer-III at similar bit rates.. The paper concludes with a discussion of future research implications of the work.","PeriodicalId":291800,"journal":{"name":"2007 International Conference on Electrical Engineering","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130822205","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
Character Recognition Using Mathematical Morphology 基于数学形态学的字符识别
2007 International Conference on Electrical Engineering Pub Date : 2007-04-11 DOI: 10.1109/ICEE.2007.4287321
F. Mohammad, S. A. Husain
{"title":"Character Recognition Using Mathematical Morphology","authors":"F. Mohammad, S. A. Husain","doi":"10.1109/ICEE.2007.4287321","DOIUrl":"https://doi.org/10.1109/ICEE.2007.4287321","url":null,"abstract":"The automatic recognition of characters dates back to several decades, the reason being the large diversity of applications which make valuable use of recognition techniques. This paper proposes the recognition of a set of handwritten digits using mathematical morphology. Certain features that can be used to clearly distinguish one digit from the other are extracted. A decision tree has been developed to aid in the classification process. At each node a morphological operation is applied on the incoming digit, and the results dictate what the next step in the sequence should be. The method has been applied on a large sample collected from a diverse set of individuals. The recognition rates achieved are appreciable and substantially support the techniques discussed.","PeriodicalId":291800,"journal":{"name":"2007 International Conference on Electrical Engineering","volume":"310 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115909248","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: 14
Reed Solomon coded PPM for Terrestrial FSO Links 里德·所罗门为地面FSO链路编码PPM
2007 International Conference on Electrical Engineering Pub Date : 2007-04-11 DOI: 10.1109/ICEE.2007.4287281
S. Muhammad, T. Javornik, I. Jelovcan, E. Leitgcb, O. Koudelka
{"title":"Reed Solomon coded PPM for Terrestrial FSO Links","authors":"S. Muhammad, T. Javornik, I. Jelovcan, E. Leitgcb, O. Koudelka","doi":"10.1109/ICEE.2007.4287281","DOIUrl":"https://doi.org/10.1109/ICEE.2007.4287281","url":null,"abstract":"Free space optical communications (FSO) are fast emerging as the most promising approach for addressing the emerging broadband access network and its \"last mile\" bottleneck. However, atmospheric attenuations and weather dependence remain the major hurdle in the wide scale acceptability of the technology. This paper proposes performance enhancement using higher state modulation schemes (i.e. 16 and 256-PPM) which promises a gain upto 25 dB when combined with RS codes as compared to the current widely used 2 state modulation mechanisms. The \"RS-coded PPM\" is shown as an extremely robust and well performing coded-modulation scheme for future FSO systems using a novel approach to terrestrial FSO channel modeling.","PeriodicalId":291800,"journal":{"name":"2007 International Conference on Electrical Engineering","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115147478","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
Low-Power High-Performance and Dynamically Configured Multi-Port Cache Memory Architecture 低功耗高性能和动态配置的多端口缓存存储器架构
2007 International Conference on Electrical Engineering Pub Date : 2007-04-11 DOI: 10.1109/ICEE.2007.4287320
H. Bajwa, EE X.Chen
{"title":"Low-Power High-Performance and Dynamically Configured Multi-Port Cache Memory Architecture","authors":"H. Bajwa, EE X.Chen","doi":"10.1109/ICEE.2007.4287320","DOIUrl":"https://doi.org/10.1109/ICEE.2007.4287320","url":null,"abstract":"As on-chip cache size has increased considerably in recent high-performance microprocessor technologies, power dissipation and leakage current in SRAM have become critical. High-performance IC designs use multi-port cache memory to provide the needed accessibility and bandwidth. Since the word and bit lines cover the foot-print of the entire cache section, duplicating the word and bit lines for multiple ports results in large silicon area and increases bitline discharge and power dissipation. As technology scales down device size and supply voltages, static power dissipation has emerged as a critical factor in total system power dissipation. In this paper, we present an area-and energy-efficient multi-port cache memory architecture, which employs isolation nodes, local sense amplifiers and dynamic memory partitioning techniques, to facilitate simultaneous multi-port accesses without duplicating bitlines. The proposed cache memory architecture also reduces bitline latency.","PeriodicalId":291800,"journal":{"name":"2007 International Conference on Electrical Engineering","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128935338","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
Hybrid Edge Detector 混合边缘检测器
2007 International Conference on Electrical Engineering Pub Date : 2007-04-11 DOI: 10.1109/ICEE.2007.4287357
Imran Touqir, M. Saleem, Adil Masood Siddiqui
{"title":"Hybrid Edge Detector","authors":"Imran Touqir, M. Saleem, Adil Masood Siddiqui","doi":"10.1109/ICEE.2007.4287357","DOIUrl":"https://doi.org/10.1109/ICEE.2007.4287357","url":null,"abstract":"In this paper a hybrid edge detection algorithm has been envisaged. Real Images are often corrupted by noise from various sources. The classical edge detectors fail to give adequate intelligence of edges for images with depleted signal to noise ratio (SNR). A major dilemma in edge-detection for noisy images is the choice of optimum threshold which lacks generality. The dominance of noise in image reflects false edges in spatial domain. Addressing this dilemma, this paper presents a methodology and a framework in which smoothing effects of wavelet filters have been exploited prior to classical operators. Experimental results indicate that the hybrid edge detector gives qualitative and quantitative results comparable to Canny (1986), while it is simpler to implement.","PeriodicalId":291800,"journal":{"name":"2007 International Conference on Electrical Engineering","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125525563","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
A Centralized DSM Algorithm for Multiuser Digital Subscriber Line Systems 多用户数字用户线路系统的集中DSM算法
2007 International Conference on Electrical Engineering Pub Date : 2007-04-11 DOI: 10.1109/ICEE.2007.4287355
A. Rashdi, N. Sheikh
{"title":"A Centralized DSM Algorithm for Multiuser Digital Subscriber Line Systems","authors":"A. Rashdi, N. Sheikh","doi":"10.1109/ICEE.2007.4287355","DOIUrl":"https://doi.org/10.1109/ICEE.2007.4287355","url":null,"abstract":"In this paper we present a dynamic spectrum management (DSM) Level-2 algorithm based on centralized power control and crosstalk cancellation for multiuser digital subscriber line (DSL) systems with heavily unbalanced crosstalk channels. This algorithm combines two approaches: crosstalk cancellation and crosstalk suppression to combat crosstalk degradation effects. Our algorithm performs crosstalk cancellation on the selected tones before power control through spectrum management center (SMC) which considerably improves DSL upstream data rate with affordable run time complexity.","PeriodicalId":291800,"journal":{"name":"2007 International Conference on Electrical Engineering","volume":"51 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116386126","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
Performance of Wavelet - Based Threshold Selection Schemes for Watermark Detection 基于小波的阈值选择水印检测方法的性能
2007 International Conference on Electrical Engineering Pub Date : 2007-04-11 DOI: 10.1109/ICEE.2007.4287291
B. Molavi, H. Ahmadi, A. Sadr
{"title":"Performance of Wavelet - Based Threshold Selection Schemes for Watermark Detection","authors":"B. Molavi, H. Ahmadi, A. Sadr","doi":"10.1109/ICEE.2007.4287291","DOIUrl":"https://doi.org/10.1109/ICEE.2007.4287291","url":null,"abstract":"Watermark detection can be considered as an estimation problem in which the watermark sequence has to be estimated from a possibly distorted image. In this paper, we use wavelet threshold estimation for extraction of watermark sequence. The correlation matching is then used for checking for the presence of the watermark. It is shown that the performance of this method is superior to that of correlation matching. The performance of two threshold selection methods are compared for this purpose. The watermark embedding is performed in wavelet domain.","PeriodicalId":291800,"journal":{"name":"2007 International Conference on Electrical Engineering","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122489634","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
Long-Term Forecasting of Internet Traffic for Pakistan Internet Exchange 巴基斯坦互联网交换网络流量的长期预测
2007 International Conference on Electrical Engineering Pub Date : 2007-04-11 DOI: 10.1109/ICEE.2007.4287340
M. Alam
{"title":"Long-Term Forecasting of Internet Traffic for Pakistan Internet Exchange","authors":"M. Alam","doi":"10.1109/ICEE.2007.4287340","DOIUrl":"https://doi.org/10.1109/ICEE.2007.4287340","url":null,"abstract":"The paper makes future predictions of the Internet traffic demand by applying statistical techniques on data collected between two nodes of Pakistan's Internet backbone over a period of two years. The predictions simplify die task of capacity planning for the network management by helping them determine when and to what extent future provisioning is required in the backbone. This is not easy as quantified information is missing about the rate of increase and the pattern followed by the Internet traffic demand. We have used various statistical analysis methods on aggregate Internet demand between two nodes to isolate the long term trend from the noisy short term fluctuations in the overall traffic pattern, ensure its variance is within control limits and finally make a model out of it to make predictions for future. The reliability of the future predictions given by our proposed model is proved empirically by the fact that the estimates of the future values deviate by only 7% from the actual values observed during that time.","PeriodicalId":291800,"journal":{"name":"2007 International Conference on Electrical Engineering","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116550719","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
Design and Development of Communication Adapter for Legacy Substation Devices 传统变电站设备通信适配器的设计与开发
2007 International Conference on Electrical Engineering Pub Date : 2007-04-11 DOI: 10.1109/ICEE.2007.4287331
M.A. Jamil, Z. Khan
{"title":"Design and Development of Communication Adapter for Legacy Substation Devices","authors":"M.A. Jamil, Z. Khan","doi":"10.1109/ICEE.2007.4287331","DOIUrl":"https://doi.org/10.1109/ICEE.2007.4287331","url":null,"abstract":"The work was carried to integrate the legacy substation devices with the modern substation system. Since the new standardization recently introduced requites all existing substation devices to be replaced with the new ones. But for the developing countries, it is not feasible to completely replace the substation devices all at once due to involvement of huge investments. As a result, the power system operation cannot be improved due to non-availability of information regarding the status, history, fault report, etc. of such legacy substation devices. A communication adapter needed to integrate the substation legacy devices i.e. without communication capability, with the modern utility information retrieval systems. This paper will present the design and development of low cost optimal communication adapter which will be based on both hardware and software implementation. It will serve a lot keeping in view the new open energy market demands, low cost, interoperability, and computational speed, permitting sharing of data and computing resources across power system. The results of processing and related reports are concisely displayed on the user interface screen and exported through data files.","PeriodicalId":291800,"journal":{"name":"2007 International Conference on Electrical Engineering","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125739916","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
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