Chutchavong, Vanvisa
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Chutchavong, Vanvisa
Alternative Name
Chutchavong, V.
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Email
vanvisa.ch@kmitl.ac.th
10 results
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Item type:Publication, Equalization of the distorted chrominance signal using IIR digital filter with the bernstein filter(2005-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, An IIR digital video equalizer design with the bernstein polynomial and generalized bilinear transformation for gain chrominance distortion(2008-12-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Measurement and examination of the relation between ionospheric scintillation expression methods in equatorial region(2002-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Improved model for traffic fluctuation prediction by neural network(2007-12-01); Sangaroon, O.The traffic prediction are mainly used to improve the performance of telecommunication network management. This paper improved model for telephone traffic prediction in Thailand by using artificial neural network (ANN) with back propagation learning algorithms. By applied data which is collected at different node in main routes of TOT, Thailand telephone network for learning process and testing. The neural network structure and input/output musters are descried in detail. We present the comparatively results of simulation with another methods, the results shows traffic fluctuation prediction by the method of ANN is accurately. ©ICROS. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Circularly polarized right angle slot antennas for WLAN of IEEE 802.11b/g(2008-12-01); ; Wakabayashi, T.In this paper, the design consideration for right-hand (clockwise) and left-hand (counterclockwise) circularly polarized microstrip slot antennas are presented. The circularly polarized antenna consists of two right angle slot antennas that is two orthogonal modes in phase quadrature or an array of linearly polarized slot with proper orientations and phases. This antenna can generate circular polarization by radiating orthogonal field components from two slots with equal amplitude but in phase quadrature. Two orientations for circularly polarized are investigated in this paper from simulation and measurement results are shown at resonance frequency 2.45 GHz on return loss, VSWR and radiation patterns.I © 2008 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Performance of a robust variable step-size LMS adaptive algorithm for multiple echo cancellation in telephone network(2006-12-01); Benjangkaprasert, C.The used of adaptive echo canceller is to estimate the impulse response of echo path and synthesizes an echo replica to subtracted from the echo signal in telephone network. Moreover, most echo paths change their characteristics frequency according to the noisy environment. To cancel multiple echoes, the number of tap coefficients of a conventional echo canceller must be large. The length of the echo canceller will directly affect both the degree of accuracy and the convergence speed the adaptation process. In this paper presents the comparison of the performance of the robust variable step-size LMS adaptive algorithm and the LMS adaptive algorithm for cancels multiple echoes signal in telephone networks. The core of this paper is a multiple delay estimator, which estimates and distributes delays to each individual fixed length short echo canceller. The simulation results are show that with the delays given, the robust variable step-size LMS adaptive algorithm can update the echo path accurately. © 2006 ICASE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, On design of video equalizer for distorted chrominance based on the Bernstein Polynomials(2006-12-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Adaptive equalization of the distorted chrominance signal using VSQLMp error criterion(2004-12-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, ANN based NGN IP traffic prediction in Thailand(2007-12-01); Sangaroon, O.This paper presents a study of using Artificial neural network (ANN) in predicting IP traffic fluctuation in IP based next generation network (NGN) in Thailand. By analyzing the time level correlation of traffic flow over TOT IP core network, monitor by the Multi Router Traffic Grapher (MRTG) from January,2006 to December, 2006 at Latya and Phrakhanong exchange. For comparison purposes, the back propagation learning algorithms are considered, in particular, optimization techniques with statistical methods prediction such us Double Exponential smoothing, Lest Square Methods and Adaptive response rate simple exponential smoothing method are applied for predicting the same node of problems. Computational results by using the data monitoring at Latya exchange for training and actual traffic in Phrakhanong area to check prediction correctness show that the based ANN method obtained better results, it can be prediction more precisely. © ICROS. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Object-oriented design message control multi-threaded execution(2006-12-01); Sangaroon, O.Threads class is represented as object the oriented design in programming languages. The multi-threaded execution collides from the same data access. This problem is fixed by synchronization critical section method in every thread, when the process is finished its behavior of terminated time of multithreading. Another problem arises due to threads class does not concurrent terminate execution. This paper also presents an object-oriented design using message control to solve concurrent terminated execution problem. By using a concept that every thread can be communicate to the center of object class. The main object decides to handle on every thread with stability executions. The benefit of handle during run time is broken and continue execute of threads. Using Delphi programming carries out an experimental result. © 2006 ICASE.