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Proceedings IEEE Southeastcon '92最新文献

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Timing jitter characterization for pulsed and pulsed Doppler radars 脉冲和脉冲多普勒雷达的时序抖动特性
Proceedings IEEE Southeastcon '92 Pub Date : 1992-04-12 DOI: 10.1109/SECON.1992.202335
M. Budge
{"title":"Timing jitter characterization for pulsed and pulsed Doppler radars","authors":"M. Budge","doi":"10.1109/SECON.1992.202335","DOIUrl":"https://doi.org/10.1109/SECON.1992.202335","url":null,"abstract":"The author presents a characterization of timing jitter in terms of its impact on the frequency spectrum at the output of the sampler, or range gate, in a pulsed or pulsed Doppler radar signal processing chain. Two manifestations of timing jitter are considered. One of these is where timing jitter causes variations in the position of the transmitted pulse or the times at which the matched filter output is sampled. The second is where timing jitter affects the width of the transmitted pulse. The specific portion of the radar signal processing chain considered is the matched filter and sampler. The spectrum of interest is that at the output of the sampler, which is characterized in terms of the autocorrelation of the timing jitter. Explicit formulations are derived for the case where the timing jitter is independent from pulse to pulse.<<ETX>>","PeriodicalId":230446,"journal":{"name":"Proceedings IEEE Southeastcon '92","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131995115","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
Integrating edge and surface information for range image segmentation 结合边缘和表面信息进行距离图像分割
Proceedings IEEE Southeastcon '92 Pub Date : 1992-04-12 DOI: 10.1109/SECON.1992.202319
S. Bhandarkar, A. Siebert
{"title":"Integrating edge and surface information for range image segmentation","authors":"S. Bhandarkar, A. Siebert","doi":"10.1109/SECON.1992.202319","DOIUrl":"https://doi.org/10.1109/SECON.1992.202319","url":null,"abstract":"The authors show that the synergetic combination of both surface- and edge-based segmentation processes can lead to more accurate segmentation results than just either one alone. A segmentation algorithm which integrates edge and surface information to come up with a high-level description of a scene given a range image is proposed. It is shown that the surface parameters can be used for accurate computation of surface discontinuity parameters. The presence or absence of a predicted surface discontinuity in the image can be used to guide and correct the process of extracting homogeneous surface regions in the range image. Experimental results on real range images indicated the advantages of the proposed technique.<<ETX>>","PeriodicalId":230446,"journal":{"name":"Proceedings IEEE Southeastcon '92","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133755457","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: 29
Gain enhancement of circular waveguide antennas using dielectric disc 利用介质盘增强圆波导天线的增益
Proceedings IEEE Southeastcon '92 Pub Date : 1992-04-12 DOI: 10.1109/SECON.1992.202358
A. Kishk, B. Moumneh
{"title":"Gain enhancement of circular waveguide antennas using dielectric disc","authors":"A. Kishk, B. Moumneh","doi":"10.1109/SECON.1992.202358","DOIUrl":"https://doi.org/10.1109/SECON.1992.202358","url":null,"abstract":"The directivity of a circular waveguide antenna has been enhanced by utilizing a dielectric disc in front of its aperture. The effect of different parameters on the antenna directivity was investigated. The waveguide is considered with or without a conducting flange. The analysis was carried out numerically using the method of moments to solve the surface integral equations for the unknown equivalent currents. It was found that the presence of the conducting image significantly enhances the antenna directivity.<<ETX>>","PeriodicalId":230446,"journal":{"name":"Proceedings IEEE Southeastcon '92","volume":"235 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114544844","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
Current collection by a conducting spherical satellite in the ionosphere 电离层中导电球形卫星的电流收集
Proceedings IEEE Southeastcon '92 Pub Date : 1992-04-12 DOI: 10.1109/SECON.1992.202311
V. Chaganti, N. Singh
{"title":"Current collection by a conducting spherical satellite in the ionosphere","authors":"V. Chaganti, N. Singh","doi":"10.1109/SECON.1992.202311","DOIUrl":"https://doi.org/10.1109/SECON.1992.202311","url":null,"abstract":"The current collection by a conducting satellite moving in a magnetized plasma across the Earth's magnetic field was studied by means of numerical simulations. The satellite was assumed to be a conducting sphere. In the low Earth orbit, the satellite moves with an orbital velocity V/sub 0/ approximately=8 km/s perpendicular to the Earth's magnetic field lines. This orbital velocity V/sub 0/ is relative to the plasma. Numerical simulations have been carried out to determine the current collected by the satellite moving in a magnetized plasma. For comparison, simulations for the plasma having no relative motion between the plasma and the satellite have been also carried out. The results from the later simulations agree with the canonical upper bound on the collected current calculated by Parker and Murphy (1967). Results from simulations with the relative drift of 8 km/s show that the collected current by the satellite is appreciably greater than that collected without the relative drift.<<ETX>>","PeriodicalId":230446,"journal":{"name":"Proceedings IEEE Southeastcon '92","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133880997","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
Cross-correlation properties of a DS-CDMA communication network using MFSK modulation 使用MFSK调制的DS-CDMA通信网络的互相关特性
Proceedings IEEE Southeastcon '92 Pub Date : 1992-04-12 DOI: 10.1109/SECON.1992.202373
S. Miller
{"title":"Cross-correlation properties of a DS-CDMA communication network using MFSK modulation","authors":"S. Miller","doi":"10.1109/SECON.1992.202373","DOIUrl":"https://doi.org/10.1109/SECON.1992.202373","url":null,"abstract":"The author examines the correlation parameters of interest in a direct-sequence code-division multiple-access (DS-CDMA) communication network using M-ary frequency shift keying (MFSK) modulation. It is shown that the key multi-user interference parameters can be written in terms of cross-correlation functions with respect to a sinusoidal weighting function. The presence of these weighting functions is found to increase the peak cross-correlation of commonly used spreading sequences by a significant amount. One example shows an increase in the peak cross-correlation of 40%.<<ETX>>","PeriodicalId":230446,"journal":{"name":"Proceedings IEEE Southeastcon '92","volume":"19 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133817660","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
Application of a discrete jump-detection algorithm to a continuous system 离散跳变检测算法在连续系统中的应用
Proceedings IEEE Southeastcon '92 Pub Date : 1992-04-12 DOI: 10.1109/SECON.1992.202243
F. Chowdhury, J. Aravena
{"title":"Application of a discrete jump-detection algorithm to a continuous system","authors":"F. Chowdhury, J. Aravena","doi":"10.1109/SECON.1992.202243","DOIUrl":"https://doi.org/10.1109/SECON.1992.202243","url":null,"abstract":"The effectiveness of a discrete jump detection and state estimation algorithm applied to a continuous system is investigated. A three-state decision rule (yes, no, maybe) is used to detect parameter jumps. For the maybe region, a random walk model of the system is invoked. The continuous system modeling program was used to simulate a continuous system and obtain sampled input-output sequences. A sudden change in the original system produced a change in one of the parameters of its autoregressive moving average model, which was detected by the algorithm, and the new value was estimated. The problems of sensitivity and false alarm are discussed.<<ETX>>","PeriodicalId":230446,"journal":{"name":"Proceedings IEEE Southeastcon '92","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133511379","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
A comparison of quartic vs. binary neural network designs 四次与二值神经网络设计的比较
Proceedings IEEE Southeastcon '92 Pub Date : 1992-04-12 DOI: 10.1109/SECON.1992.202385
W. A. Porter, X. Zheng
{"title":"A comparison of quartic vs. binary neural network designs","authors":"W. A. Porter, X. Zheng","doi":"10.1109/SECON.1992.202385","DOIUrl":"https://doi.org/10.1109/SECON.1992.202385","url":null,"abstract":"A distributed neural network referred to as a neuromic array, which is restricted to binary alphabets, has been previously introduced (Porter, 1988). The present study loosens this restriction by demonstrating the design extension to the quartic case. A natural morphism between the quartic-valued and binary-valued vector spaces is used to establish a design equivalence between the two settings. The study compares the robustness and performance of equivalent binary and quartic designs. Extensive simulations indicated that the performance of binary design eroded only slightly when transported to the quartic case. The quartic design required fewer neurons, and a higher density was achieved.<<ETX>>","PeriodicalId":230446,"journal":{"name":"Proceedings IEEE Southeastcon '92","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121856004","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
A stability theorem for a class of second order nonlinear systems with an application to robotics 一类二阶非线性系统的稳定性定理及其在机器人中的应用
Proceedings IEEE Southeastcon '92 Pub Date : 1992-04-12 DOI: 10.1109/SECON.1992.202383
M. Grabbe, D. Dawson
{"title":"A stability theorem for a class of second order nonlinear systems with an application to robotics","authors":"M. Grabbe, D. Dawson","doi":"10.1109/SECON.1992.202383","DOIUrl":"https://doi.org/10.1109/SECON.1992.202383","url":null,"abstract":"Optimal control theory is used to generate a feedback control which stabilizes a class of second-order nonlinear systems. Specifically, the Hamilton-Jacobi-Bellman (HJB) equation of dynamic programming is used to show that the control is the solution to a quadratic optimal control problem in which the second-order system serves as a dynamic constraint. The stability result follows from the fact that the solution to the HJB equation serves as a Lyapunov function for the given system. An application of this result to the trajectory tracking of a robot manipulator is given.<<ETX>>","PeriodicalId":230446,"journal":{"name":"Proceedings IEEE Southeastcon '92","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124888386","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
Probe acquisition for the MSPARC hybrid monitor 用于MSPARC混合监视器的探针采集
Proceedings IEEE Southeastcon '92 Pub Date : 1992-04-12 DOI: 10.1109/SECON.1992.202361
J. Kidd, J. Harden, D. Linder
{"title":"Probe acquisition for the MSPARC hybrid monitor","authors":"J. Kidd, J. Harden, D. Linder","doi":"10.1109/SECON.1992.202361","DOIUrl":"https://doi.org/10.1109/SECON.1992.202361","url":null,"abstract":"The MSPARC multicomputer uses processor-based monitoring hardware and probe acquisition software for instrumentation purposes. The authors give an overview of the monitor system and design considerations regarding the probe software. Each node of the mesh connected MSPARC consists of a numerical element and a communications board used to pass messages via custom routers located on a backplane. In addition to the message-passing circuitry, the communications board also contains the instrumentation and monitoring hardware. The monitor and its separate interconnection network are used to assist in application performance monitoring, program design, hardware and software debugging, and hardware analysis. Performance data are transferred from an application program to the monitor system in the form of software probes. The software provides initialization, probe processing, communications, and debug capabilities for a monitor node.<<ETX>>","PeriodicalId":230446,"journal":{"name":"Proceedings IEEE Southeastcon '92","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127757161","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
Closed-loop control of oxygen delivery during aeromedical evacuation of patients 病人航空医疗后送过程中氧输送的闭环控制
Proceedings IEEE Southeastcon '92 Pub Date : 1992-04-12 DOI: 10.1109/SECON.1992.202432
G. Ritchie, T. Jannett
{"title":"Closed-loop control of oxygen delivery during aeromedical evacuation of patients","authors":"G. Ritchie, T. Jannett","doi":"10.1109/SECON.1992.202432","DOIUrl":"https://doi.org/10.1109/SECON.1992.202432","url":null,"abstract":"A prototype oxygen delivery system was developed and tested. It controls oxygen and air delivery in order to regulate arterial oxygen saturation (SaO/sub 2/) and breathing circuit volume, thereby protecting patients from hypoxemia while minimizing the use of oxygen. Three discrete-time, digital control loops make up the system. The primary controller regulates the SaO/sub 2/ through a proportional controller to adjust the setpoint circuit oxygen concentration. The other two control loops regulate the circuit oxygen concentration and volume. The system was tested on four healthy human volunteers in a hypobaric chamber. Two trials were conducted with each volunteer. The servo-controlled oxygen delivery system successfully regulated SaO/sub 2/ in each volunteer for both trials. The results of the trials are summarized.<<ETX>>","PeriodicalId":230446,"journal":{"name":"Proceedings IEEE Southeastcon '92","volume":"2015 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128048966","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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