Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal Basic Information
Journal DOI :
Electronics and Telecommunications Research Institute
Editor in Chief :
Volume & Issues
Volume 15, Issue 2 - Oct 1993
Selecting the target year
Performance Analysis of the Clutter Map CFAR Detector with Noncoherent Integration
Kim, Chang-Joo ; Lee, Hyuck-Jae ;
ETRI Journal, volume 15, issue 2, 1993, Pages 1~1
Nitzberg has analyzed the detection performance of the clutter map constant false alarm rate (CFAR) detector using single pulse. In this paper, we extend the detection analysis to the clutter map CFAR detector that employs M-pulse noncoherent integration. Detection and false alarm probabilities for Swerling target models are derived. The analytical results show that the larger the number of integrated pulses M, the higher the detection probability. On the other hand, the analytical results for Swerling target models show that the detection performance of the completely decorrelated target signal is better than that of the completely correlated target.
A New Method for Extracting Interface Trap Density in Short-Channel MOSFETs from Substrate-Bias-Dependent Subthreshold Slopes
Lyu, Jong-Son ;
ETRI Journal, volume 15, issue 2, 1993, Pages 11~11
Interface trap densities at gate oxide/silicon substrate (
) interfaces of metal oxide semiconductor field-effect transistors (MOSFETs) were determined from the substrate bias dependence of the subthreshold slope measurement. This method enables the characterization of interface traps residing in the energy level between the midgap and that corresponding to the strong inversion of small size MOSFET. In consequence of the high accuracy of this method, the energy dependence of the interface trap density can be accurately determined. The application of this technique to a MOSFET showed good agreement with the result obtained through the high-frequency/quasi-static capacitance-voltage (C-V) technique for a MOS capacitor. Furthermore, the effective substrate dopant concentration obtained through this technique also showed good agreement with the result obtained through the body effect measurement.
Equivariance, Shrinkage, and Intransitivity for Pitman Domination
Yoo, Seong-Mo ;
ETRI Journal, volume 15, issue 2, 1993, Pages 27~27
Pitman-Intransitive triples of estimators are constructed, based on prior work on equivariant estimators and prior work on shrinkage.
Function Approximation Based on a Network with Kernel Functions of Bounds and Locality : an Approach of Non-Parametric Estimation
Kil, Rhee-M. ;
ETRI Journal, volume 15, issue 2, 1993, Pages 35~35
This paper presents function approximation based on nonparametric estimation. As an estimation model of function approximation, a three layered network composed of input, hidden and output layers is considered. The input and output layers have linear activation units while the hidden layer has nonlinear activation units or kernel functions which have the characteristics of bounds and locality. Using this type of network, a many-to-one function is synthesized over the domain of the input space by a number of kernel functions. In this network, we have to estimate the necessary number of kernel functions as well as the parameters associated with kernel functions. For this purpose, a new method of parameter estimation in which linear learning rule is applied between hidden and output layers while nonlinear (piecewise-linear) learning rule is applied between input and hidden layers, is considered. The linear learning rule updates the output weights between hidden and output layers based on the Linear Minimization of Mean Square Error (LMMSE) sense in the space of kernel functions while the nonlinear learning rule updates the parameters of kernel functions based on the gradient of the actual output of network with respect to the parameters (especially, the shape) of kernel functions. This approach of parameter adaptation provides near optimal values of the parameters associated with kernel functions in the sense of minimizing mean square error. As a result, the suggested nonparametric estimation provides an efficient way of function approximation from the view point of the number of kernel functions as well as learning speed.
An Approach to the Market Analysis of KoreaSat Services
Park, Myeong-Cheol ; Choi, Hyuk-Jun ;
ETRI Journal, volume 15, issue 2, 1993, Pages 53~53
The field of marketing research in the satellite communication services is still in the early stage of its development. Particularly, in Korean domestic satellite service market, many theoretical and methodological opportunities now exist. In this paper we develop a model, which identifies target markets and promising application services in Korean satellite communication service Market. One key contribution of this paper is a modeling approach to the assessment of market potential and priorities of the application services in each Korean industry. We define and estimate the degree of attractiveness for each segmented market which represents the market potential estimated by current usage of terrestrial services and each market segment's willingness to adopt satellite technology. Since all possible satellite application services are not equally important in the market, they should be differentiated in terms of the likelihood of success. We introduce another index prioritizing application services by tying together three important factors affecting Korean satellite service demand. Some marketing implications of model results are also discussed. Finally the findings of our model are compared with those of other similar studies.
Research Joint Venture and Open Economy
Kim, Bum-Hoan ;
ETRI Journal, volume 15, issue 2, 1993, Pages 69~69
The consumer surplus under the open economy is greater than that under the closed economy from the viewpoint of social welfare. This indication has been proved when only the product market is considered. This article is to show how this result is changed if the R&D market as well as the product market is considered. We find the possibility that the closed economy is preferred to the open economy in case of the (international) R&D joint venture.
A Modeling Tool for X-Window Application Software Development
Lee, Joon-Seok ; Lee, Sang-Bum ; Chi, Dong-Hae ;
ETRI Journal, volume 15, issue 2, 1993, Pages 75~75
This paper presents a modeling tool, so-called X-ADD (X-window application Analysis & Design Diagram), which is useful for the understanding of existing X-window application program and the development of new X-window application software. This X-ADD tool is available for the X-window applications maintenance activities such as program understanding, and program analysis by the concept of reverse engineering. In addition, it supports the analysis and design for the new X-window application system development. Therefore, by the use of this tool, the visibility of the existing X-window application programs can be enhanced and modeling for the design of new X-window application systems can be easily made.