Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555)最新文献_第6页

Decorrelation receivers for unresolved multipath Ricean fading channels 未解析多径Ricean衰落信道的去相关接收机

Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555) Pub Date : 2001-05-13 DOI: 10.1109/CCECE.2001.933643

F. Danilo-Lemoine, H. Leib

{"title":"Decorrelation receivers for unresolved multipath Ricean fading channels","authors":"F. Danilo-Lemoine, H. Leib","doi":"10.1109/CCECE.2001.933643","DOIUrl":"https://doi.org/10.1109/CCECE.2001.933643","url":null,"abstract":"This paper considers specular coherent and non-coherent optimal, as well as sub-optimal detection structures for unresolved multipath Ricean fading channels with known delays. Specular coherent receiver structures require carrier phase estimation of the Ricean specular component. Non-coherent structures, on the other hand, do not make use of the specular coherent carrier phase. It is shown that both detection techniques include a multipath decorrelation stage before diversity combining, generalizing the Rake receiver. It is also shown that for high SNR, the specular coherent structure converges to the non-coherent structure. A sub-optimal technique based on a quadratic decorrelation receiver (QDR) that is easier to implement than the optimal non-coherent structure is also presented. Based on single pulse performance analysis, this paper shows that the decorrelation stage is essential in eliminating error floors. The results demonstrate that diversity gains over unresolved multipath fading channels can be obtained if multipath decorrelation is performed before diversity combining. This work also shows that while specular coherent detection performs in general better than non-coherent, in many cases the advantages for high SNR are very small.","PeriodicalId":184523,"journal":{"name":"Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129785864","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

An active refresh method in Web caching Web缓存中的活动刷新方法

Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555) Pub Date : 2001-05-13 DOI: 10.1109/CCECE.2001.933691

Gang Zhang, Y. Shu, Zheng Zhao, Zhijie Guan, O. Yang

引用次数: 0

Application of artificial neural network in noise mixed partial discharge recognition 人工神经网络在噪声混合局部放电识别中的应用

Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555) Pub Date : 2001-05-13 DOI: 10.1109/CCECE.2001.933765

Zhong Zheng, K. Tan

引用次数: 0

Fixed block-based lossless compression of digital mammograms 固定的基于块的数字乳房x光片无损压缩

Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555) Pub Date : 2001-05-13 DOI: 10.1109/CCECE.2001.933567

M.Y. Al-Saiegh, S. Krishnan

{"title":"Fixed block-based lossless compression of digital mammograms","authors":"M.Y. Al-Saiegh, S. Krishnan","doi":"10.1109/CCECE.2001.933567","DOIUrl":"https://doi.org/10.1109/CCECE.2001.933567","url":null,"abstract":"Breast cancer is a leading cause of death among women in Canada. Computer-aided diagnosis of mammograms (X-ray films of breast tissue) is a noninvasive and an inexpensive way of diagnosing breast cancer. The objective of this project is to investigate image compression schemes for faithful transmission and reproduction of digital mammography data over a communication link. A fixed block-based (FBB) near lossless compression scheme for mammograms has been developed which runs in conjunction with traditional compression schemes such as Huffman coding and Lempel-Ziv Welch (1978) coding. The algorithm codes blocks of pixels within the image that contain the same intensity value (the odds of having blocks of the same pixel values in a mammography image are very high), thus reducing the size of the image substantially while encoding the image at the same time. The proposed compression scheme was applied on 44 mammograms (22 benign and 22 malignant), and the compression scheme provided a compression ratio of 1.7:1. When Huffman (1952) coding and LZW coding were used in conjunction with the FBB compression scheme, the compression ratio was 3.81:1 for Huffman, and 5:1 for LZW coding. The proposed FBB lossless compression technique seems to be promising for teleradiology applications.","PeriodicalId":184523,"journal":{"name":"Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116213982","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

Fault characterizations and design-for-testability technique for detecting I/sub DDQ/ faults in CMOS/BiCMOS circuits CMOS/BiCMOS电路中I/sub DDQ/故障检测的故障表征和可测试性设计技术

Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555) Pub Date : 2001-05-13 DOI: 10.1109/CCECE.2001.933594

K. Raahemifar, Mokhtar Ahmadi

引用次数: 0

Broadband array design for performance improvement 改进性能的宽带阵列设计

Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555) Pub Date : 2001-05-13 DOI: 10.1109/CCECE.2001.933670

Q. Zeng, D. O'Shaughnessy

引用次数: 2

Analysis of a voltage regulator for self-excited induction generator employing current-type static compensator 采用电流型静态补偿器的自励感应发电机稳压器分析

Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555) Pub Date : 2001-05-13 DOI: 10.1109/CCECE.2001.933588

H. Karshenas, A. Abdolahi

引用次数: 15

Technologies for hybrid wavelength/time optical CDMA transmission 波长/时间混合光CDMA传输技术

Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555) Pub Date : 2001-05-13 DOI: 10.1109/CCECE.2001.933723

L.R. Chen

引用次数: 7

Neural networks and fuzzy logic in electrical engineering 电气工程中的神经网络与模糊逻辑

Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555) Pub Date : 2001-05-13 DOI: 10.1109/CCECE.2001.933575

F. Jurado, B. Ogayar, M. Castro, J. Carpio

引用次数: 2

A genetic algorithm for testable data path synthesis 可测试数据路径合成的遗传算法

Canadian Conference on Electrical and Computer Engineering 2001. Conference Proceedings (Cat. No.01TH8555) Pub Date : 2001-05-13 DOI: 10.1109/CCECE.2001.933689

H. Harmanani, R. Saliba, M. Khoury

引用次数: 2