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Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing最新文献

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Analysis of a two-pass modified Hough transform technique for the detection of wake-like signals 类尾迹信号检测的两道改进霍夫变换技术分析
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48314
M. Wilmut, R. MacKinnon
{"title":"Analysis of a two-pass modified Hough transform technique for the detection of wake-like signals","authors":"M. Wilmut, R. MacKinnon","doi":"10.1109/PACRIM.1989.48314","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48314","url":null,"abstract":"A procedure is developed using the modified Hough transform (MHT) for the detection of signals of low signal-to-noise ratio. The signal can be considered as being composed of a sum of narrow lines. The expected number of signal and false lines to be found in an image can be determined as a function of the false alarm probability pre decision. The MHT performance is compared to that of the matched filter. The method is applied to noisy images containing a wakelike signal. The MHT is able to detect the signal pattern at signal-to-noise ratios for which the signal is just visible on a good image display system. A two-pass system, using prior knowledge about the signal, gives improved detection performance.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132620679","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
A mesh-like array processor with fully connected rows and columns 具有完全连接的行和列的网格状数组处理器
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48327
R. Hobson, M. Rostam-Kafhesh
{"title":"A mesh-like array processor with fully connected rows and columns","authors":"R. Hobson, M. Rostam-Kafhesh","doi":"10.1109/PACRIM.1989.48327","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48327","url":null,"abstract":"A variation on the two-dimensional interconnection mesh is proposed which can be implemented very efficiently using VLSI technology for chips and packaging. Direct connectivity along rows and columns reduces the diagonal of an n*n 2-d mesh from 2n-2 to 2. This technique permits the network communication bandwidth to be more closely matched to the node processor data bus bandwidth. Direct connectivity simplifies algorithm designs and supports very efficient communication patterns. Furthermore, by using the network to hold intermediate results, node processors can feed array data directly to arithmetic units rather than first moving them to local memory.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"45 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130767686","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: 2
SIGnet: a new ultra-high-speed lightwave network architecture SIGnet:一种新型超高速光波网络架构
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48301
A. M. Bignell, T. D. Todd
{"title":"SIGnet: a new ultra-high-speed lightwave network architecture","authors":"A. M. Bignell, T. D. Todd","doi":"10.1109/PACRIM.1989.48301","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48301","url":null,"abstract":"A high-speed network architecture, SIGnet (Slotted Interconnected-Grid network), is introduced. SIGnet is intended for metropolitan and extended-metropolitan areas and is currently being studied under the extremely high-speed networks project of the Telecommunications Research Institute of Ontario. In SIGnet, the topology is piecewise-regular and permits bandwidth allocation and network evolution which is much more easily accomplished than in previous designs. Since a system consisting of an arbitrary piecewise interconnection of regular topological segments can be engineered, many of the problems are alleviated. An introduction to the new network design is given, and some preliminary results obtained concerning the traffic processing schemes which have been investigated are presented.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115233503","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
Near/far effects on packet radio networks with direct-sequence spread-spectrum signaling 直接序列扩频信令对分组无线网络的近/远影响
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48320
Y. Yao, A. Sheikh, Shixin Cheng
{"title":"Near/far effects on packet radio networks with direct-sequence spread-spectrum signaling","authors":"Y. Yao, A. Sheikh, Shixin Cheng","doi":"10.1109/PACRIM.1989.48320","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48320","url":null,"abstract":"The near/far effect on a direct-sequence spread-spectrum packet radio network is investigated. It is found that the maximum throughput of the network is decreased in the presence of near/far problems. Under high traffic conditions, however, the network with near/far problems provides higher throughput than the one without near/far problems. This suggests that the direct-sequence spread-spectrum packet radio network with near/far problems retains stability under heavy traffic conditions.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"153 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115922143","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
Jitter analysis for DS-3 to SONET interface circuit with reduced complexity 降低复杂度的DS-3到SONET接口电路的抖动分析
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48395
T. Moore, J. Brown, W. Krzymień
{"title":"Jitter analysis for DS-3 to SONET interface circuit with reduced complexity","authors":"T. Moore, J. Brown, W. Krzymień","doi":"10.1109/PACRIM.1989.48395","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48395","url":null,"abstract":"The feasibility is discussed of designing a DS-3 to 28 VT 1.5 synchronous optical network (SONET) interface circuit without using intermediate DS-2 and DS-1 desynchronizer phase-lock loops (PLLs). Elimination of intermediate PLLs results in a significant reduction in the cost and complexity of SONET interface circuits for the existing asynchronous digital multiplex hierarchy. The primary concern of implementing such an interface is the effect on accumulated DS-1 waiting time jitter. In order to analyze jitter accumulation, two multiplex models are used. Both models consist of back-to-back M13 multiplexing followed by back-to-back DS-1 to VT 1.5 mapping. The first model includes intermediate DS-2 and DS-1 desynchronizer PLLs, while the second model does not. The jitter analysis and results for both models are given. It is estimated that elimination of these PLLs can reduce the circuit complexity by 14000 gates in a DS-3 to 28 VT1.5 interface design.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"29 12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123164047","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
Systolic array implementation of a low frequency digital oscillator 一个实现收缩压阵列的低频数字振荡器
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48378
H. Kwan, P. Tsang
{"title":"Systolic array implementation of a low frequency digital oscillator","authors":"H. Kwan, P. Tsang","doi":"10.1109/PACRIM.1989.48378","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48378","url":null,"abstract":"A bit-level systolic array is presented for the implementation of a digital sinusoidal oscillator with low-frequency and low-amplitude sensitivities and low-roundoff noise. The oscillator is derived from a lossless digital two-port and is extremely suitable for low-frequency applications where conventional direct form and coupled form oscillators fail to produce comparable performances. The resultant systolic array is based on the use of a signed-digital number representation bit-level pipelined multiplier and the overall array architecture is suitable for VLSI implementation.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124911894","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: 2
A comparison between neural network and conventional vector quantization codebook algorithms 神经网络与传统矢量量化码本算法的比较
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48416
C. Pope, L. Atlas, C. Nelson
{"title":"A comparison between neural network and conventional vector quantization codebook algorithms","authors":"C. Pope, L. Atlas, C. Nelson","doi":"10.1109/PACRIM.1989.48416","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48416","url":null,"abstract":"Kohonen's (1988) unsupervised learning algorithm is successfully applied to the codebook generation problem. The algorithm has shown to provide a codebook that rivals the performance of the codebooks obtained using the conventional Linde-Buzo-Gray algorithm, while requiring a minimum amount of processing. The unsupervised learning algorithm provides the ability to adapt to changing inputs, something that is not possible with the standard algorithm. These features make Kohonen's unsupervised learning algorithm an attractive alternative to the conventional vector quantization codebook generation technique.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125002034","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
Further results on trellis coding of spread spectrum multiple access systems 扩频多址系统网格编码的进一步研究
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48296
G. Boudreau, D. Falconer, S. Mahmoud
{"title":"Further results on trellis coding of spread spectrum multiple access systems","authors":"G. Boudreau, D. Falconer, S. Mahmoud","doi":"10.1109/PACRIM.1989.48296","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48296","url":null,"abstract":"The performance of trellis coding is investigated when it is applied to a spread spectrum multiple access (SSMA) system using a conventional convolutional code. This comparison is carried out using criteria of equal complexity and throughput. The numerical results illustrate that, for a given complexity, chip rate, and throughput, low rate convolutional codes provide the best performance in a SSMA system. The coding gains range from 1 to 8 dB (depending on the type and complexity of the code) over the corresponding uncoded performances of SSMA in an additive white Gaussian noise channel. The validity of approximating the interuser interference as a Gaussian random variable is also investigated.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128796263","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
Position, rotation, and scale-invariant recognition of 2-dimensional objects using a gradient coding scheme 使用梯度编码方案的二维物体的位置、旋转和尺度不变识别
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48364
R. Safaee-Rad, B. Benhabib, Kenneth C. Smith, K. Ty
{"title":"Position, rotation, and scale-invariant recognition of 2-dimensional objects using a gradient coding scheme","authors":"R. Safaee-Rad, B. Benhabib, Kenneth C. Smith, K. Ty","doi":"10.1109/PACRIM.1989.48364","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48364","url":null,"abstract":"The two-dimensional representation and recognition of objects, based on external space-domain descriptors, is addressed. A new shape signature is proposed for two-dimensional shape recognition, namely the gradient-perimeter plot. The recognition method is position, rotation, and scale invariance. For the matching process a cost function, based on mean square error, is minimized. It is shown that, as the basis of an alternative method, the angle-perimeter plot can be used to provide a feature set for two-dimensional shapes. This method can be applied to polygonal shapes, or shapes for which polygonal approximations are available. Both methods were successfully applied to a set of standard shapes.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125246072","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
Events and actions: an object-oriented approach to real-time control systems 事件和动作:实时控制系统的面向对象方法
Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing Pub Date : 1989-06-01 DOI: 10.1109/PACRIM.1989.48355
Xichi Zheng, Shil Srivastava
{"title":"Events and actions: an object-oriented approach to real-time control systems","authors":"Xichi Zheng, Shil Srivastava","doi":"10.1109/PACRIM.1989.48355","DOIUrl":"https://doi.org/10.1109/PACRIM.1989.48355","url":null,"abstract":"An object-oriented approach is applied throughout the design of a complex real-time control system, from low-level interrupt processing and scheduling to high-level system design and configuration. The concept of events and actions as generalized objects forms the centerpiece of the software architecture. Operations on events and actions are presented, the implementation of these objects with a simple and efficient preemptive scheduler is described, and the construction of a complete system from these objects is discussed. Finally, the object-oriented approach is used to develop a declarative programming language which enables the user to configure real-time systems on the basis of the propagation of events.<<ETX>>","PeriodicalId":256287,"journal":{"name":"Conference Proceeding IEEE Pacific Rim Conference on Communications, Computers and Signal Processing","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116803386","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
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