The 24th Southeastern Symposium on and The 3rd Annual Symposium on Communications, Signal Processing Expert Systems, and ASIC VLSI Design System Theory最新文献
{"title":"An Algorithm For Direct Digital Implementation of Continuous-Time Systems","authors":"R. Morejon, F. Simons","doi":"10.1109/SSST.1992.712217","DOIUrl":"https://doi.org/10.1109/SSST.1992.712217","url":null,"abstract":"Dynamic systems, which occur in numerous engineering applications from navigation systems to communication and control systems, are often represented in the form of continuous-time differential equation models. Frequently these continuous-time models have time-varying coefficients or nonlinear effects. These conditions have traditionally posed problems for most of the existing digital implementation and simulation procedures. However, by directly implementing the analog model in its natural modular form, these problems can often be handled with much less effort. In this paper some promising techniques are investigated for the direct digital implementation of analog prototype models which may contain nonlinear or time varying parameters.","PeriodicalId":359363,"journal":{"name":"The 24th Southeastern Symposium on and The 3rd Annual Symposium on Communications, Signal Processing Expert Systems, and ASIC VLSI Design System Theory","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127003448","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}
{"title":"An Expert System for Classification of Narrowband and Broadband Signals","authors":"M. Ahmed, J. Foster","doi":"10.1109/SSST.1992.712171","DOIUrl":"https://doi.org/10.1109/SSST.1992.712171","url":null,"abstract":"The research described in this paper presents an expert system for detection and classification of signals in the presence of noise. The pattern recognition expert system detects signals based upon the shape of the power spectrum. The rule based expert system classifies signals. The expert system extracts information for presence of signals from a smoothed power spectral density. For each frame the expert system decides on the presence of signal in a noise dominate atmosphere and the rule based system classifies signals and determine any correlation between different signals.","PeriodicalId":359363,"journal":{"name":"The 24th Southeastern Symposium on and The 3rd Annual Symposium on Communications, Signal Processing Expert Systems, and ASIC VLSI Design System Theory","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127599175","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}
{"title":"Approaches to Permutation-Invariant Boolean Function Characterization","authors":"U. Schlichtrnann, F. Brglez, M. Hermann","doi":"10.1109/SSST.1992.712273","DOIUrl":"https://doi.org/10.1109/SSST.1992.712273","url":null,"abstract":"This paper introduces characteristic signatures for Boolean functions. The signatures exhibit little or no sensitivity to permutations of input variables. We use these signatures to develop a method of rapidly matching subcircuits with cells in a (large) library. The procedure is analogous to hashing. As we cannot guarantee uniqueness of the signatures, we have devised an efficient collision strategy. It is based on extending basic signatures to resolve aliases. This approach promises significant improvements for library matching with large libraries, for example in EPGA technology mapping.","PeriodicalId":359363,"journal":{"name":"The 24th Southeastern Symposium on and The 3rd Annual Symposium on Communications, Signal Processing Expert Systems, and ASIC VLSI Design System Theory","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133376246","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}
{"title":"OASIS/sup R/ Application to Re-Synthesis of FPGA Designs as Standard Cell ASICs","authors":"K. Kozminski","doi":"10.1109/SSST.1992.712210","DOIUrl":"https://doi.org/10.1109/SSST.1992.712210","url":null,"abstract":"This paper presents the ongoing work on the standard cell-based silicon compiler OASIS. A recent extension of the OASIS' capabilities permits the designer to migrate FPGA designs into standard cell technology. Performing FPGA re-synthesis part of OASIS on real-life designs reinforces the advantages of design capture on algorithmic level over the most commonly used schematic capture design entity.","PeriodicalId":359363,"journal":{"name":"The 24th Southeastern Symposium on and The 3rd Annual Symposium on Communications, Signal Processing Expert Systems, and ASIC VLSI Design System Theory","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114767696","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}
{"title":"Computer Simulation of Space-Charge-Limited I-V Characteristics in Semi-Insulating InP Films","authors":"L. Small, S. Iyer","doi":"10.1109/SSST.1992.712282","DOIUrl":"https://doi.org/10.1109/SSST.1992.712282","url":null,"abstract":"Current-voltage (I-V) characteristics of epitaxial layers grown by either hydride vapor phase epitaxy (HVPE) or metal-organic chemical vapor phase deposition (MOCVD) were examined. The HVPE data were simulated using a two trap model with trap levels at 0.660.68 eV and at 0.3-0.33 eV. Programs were also written using the differential form of Gauss' law and two variations of it. These Gaussian programs required a longer execution time; and an appropriate current range was not easily determined. In contrast, modifications could be made directly to the Gaussian programs. Both sets of programs generated identical graphs. Unfortunately, the MOCVD data could not be simulated using a single trap level at 0.66-0.68 eV as predicted. The shape of the curve was matched, but only at a much lower voltage range. Finally, a least-squares fit program was written to determine the \"fit\" of the simulated graphs.","PeriodicalId":359363,"journal":{"name":"The 24th Southeastern Symposium on and The 3rd Annual Symposium on Communications, Signal Processing Expert Systems, and ASIC VLSI Design System Theory","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117128960","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}
{"title":"Lateral Sweep Algorithm for Moving Arm Disks Under Stationary Request Arrival Process","authors":"B. N. Borah, N. Nassim-Sobhan, A. Gibson","doi":"10.1109/SSST.1992.712197","DOIUrl":"https://doi.org/10.1109/SSST.1992.712197","url":null,"abstract":"There are three disk scheduling algorithms, at present, to meet the I/O request: First In First Out (FIFO), Shortest Seek Time First (SSTF) and SWEEP. Among all three algorithms, FIFO is the most inefficient strategy with regards to seek-time or I/O service time and minimizing the time to serve the I/O request is still a major problem. Most modern computers find the SWEEP algorithm to be more efficient and convenient. The purpose of this paper is to analyze the efficiency and effectiveness of a new disk scheduling algorithm named LATERAL SWEEP. Preliminary simulation results show that Lateral Sweep scheduling uses less seek time than both SSTF and SWEEP algorithms and thus reduces the overall time to serve the I/O request.","PeriodicalId":359363,"journal":{"name":"The 24th Southeastern Symposium on and The 3rd Annual Symposium on Communications, Signal Processing Expert Systems, and ASIC VLSI Design System Theory","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123291775","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}
{"title":"Simulating Large Systems Using Ldvsim","authors":"J. V. Briner","doi":"10.1109/SSST.1992.712209","DOIUrl":"https://doi.org/10.1109/SSST.1992.712209","url":null,"abstract":"System designs tare becoming increasingly complex, and simulators must keep pace with their size and complexity. To be effective, a simulator must be fast, user oriented and integrated in the design environment. Speed is possible with the use of abstraction or parallel computation. However, an important feature not considered essential in many simulators is how well the user can interact with the simulator to do the many jobs required of simulation: architectural design, timing verification, protocol testing, and verification. This paper explores issues involved in using a simulator in the design and verification of large systems. We argue that humans are unable to handle the volume of data generated by today's simulators and that new techniques such as assertion testing, alternative data representations, interactive debuggers, and mixed level simulation for verification are necessary.","PeriodicalId":359363,"journal":{"name":"The 24th Southeastern Symposium on and The 3rd Annual Symposium on Communications, Signal Processing Expert Systems, and ASIC VLSI Design System Theory","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123929777","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}
{"title":"Using Speech Statistics to Achieve Flexibility and Spectral Efficiency in Wireless Communication Systems","authors":"H. Stern","doi":"10.1109/SSST.1992.712342","DOIUrl":"https://doi.org/10.1109/SSST.1992.712342","url":null,"abstract":"Public demand for cellular telecommunications systems and services has increased at a speed far outstripping the capacity of present systems. Restrictions on the amount of available spectrum require that future systems provide significantly improved spectral efficiency. The next generation of cellular systems (called second generation systems) will offer improved spectral efficiency by using advanced voice encoding and RF modulation techniques, but these advanced techniques alone will be insufficient to provide enough capacity to meet all of the increased demand. Third generation systems are currently being proposed which will provide further spectral efficiency and flexibility by exploiting the silent periods inherent in speech communication. This paper examines various third generation systems and the techniques they will use to exploit the silence within speech.","PeriodicalId":359363,"journal":{"name":"The 24th Southeastern Symposium on and The 3rd Annual Symposium on Communications, Signal Processing Expert Systems, and ASIC VLSI Design System Theory","volume":"289 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124171465","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}
{"title":"Constrained Regularization Approach to Curvature Estimation","authors":"K. Sohn, W. Alexander, Jung H. Kim","doi":"10.1109/SSST.1992.712269","DOIUrl":"https://doi.org/10.1109/SSST.1992.712269","url":null,"abstract":"In this paper, we propose a method for boundary smoothing using constrained regularization technique. The smoothed boundary is used to compute a curvature function. Computing a curvature function on a digitized boundary is an ill-posed problem due to the discrete nature of the boundary. Thus, the boundary needs to be smoothed before computing the curvature function. We use a constrained regularization technique to obtain the optimal smooth boundary. The curvature function is computed porn this optimal smooth boundary. This method solves a common critical problem of current curvature estimation methods in determining a unique smoothing factor. Using the above method, we derive a curvature function which is invariant under rotation, scale and translation. Thus, the resulting curvature function can be used to uniquely detect corner points.","PeriodicalId":359363,"journal":{"name":"The 24th Southeastern Symposium on and The 3rd Annual Symposium on Communications, Signal Processing Expert Systems, and ASIC VLSI Design System Theory","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125893220","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}
{"title":"Robust Position Tracking Control for Rigid-Link Flexible-Joint Robots Constrained to a Surface","authors":"M. Bridges, D. Dawson, Z. Qu","doi":"10.1109/SSST.1992.712274","DOIUrl":"https://doi.org/10.1109/SSST.1992.712274","url":null,"abstract":"This paper presents an approach for designing a robust position tracking controller for rigid-link flexible-tint (RLFJ) robot manipulator constrained to a surface. The methodology uses force control concepts that were developed for rigid link robots operating on a constrained surface and extends them to include the effects of mechanical actuator dynamics. To illustrate this approach, we develop a robust tracking controller that achieves global uniform ultimate boundedness (GUUB) stability of the link position tracking error. The controller accomplishes this while maintaining bounded end-effector surface forces in spite of model uncertainty and the presence of unknown bounded disturbances.","PeriodicalId":359363,"journal":{"name":"The 24th Southeastern Symposium on and The 3rd Annual Symposium on Communications, Signal Processing Expert Systems, and ASIC VLSI Design System Theory","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129828893","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}