마이크로 프로세서를 利用한 디지털 필터의 構成法에 關한 硏究

權熙勳 忠州大學校 1984 한국교통대학교 논문집 Vol.17 No.1

Due to the increased availability and relatively low cost of microprocessor for system implementation, microprocessor based digital filtering has received wide attention in the field of digital signal processing. In recent year a digital filter with arbitrary characteristics and configurations is easily implemented by using microprocessor. In this paper main object is to examine some aspects of implementing degital filter using microprocessor. The concepts of microprocessor based digital filter implementation is presented via a case study low pass filter designed using the bilinear Z-transform method. Implementation aspects associdted with an 8 bit general purpose micro processor based realization and a single chip signal processor are discussed.

A Single Chip Processor Architectur for Real-Time 2-D Digital Filter

權熙勳 충주대학교 1993 한국교통대학교 논문집 Vol.27 No.-

The throughput requirement for two-dimensioinal(2-D) digital filter is such that multiple processing units are essential for real-time implementation. Advances in VLSI technology make it feasible to design and implement computer systems consisting of a large number of functional units. The development of a very high throughput processor architecture for 2-D digital filter is based upon an algorithm decomposition scheme which minimizes data communication requirements. In this paper, a new single chip processor architecture for real-time 2-D digital signal processing applications are presented. This architecture extends the concept of using a single processing unit to the use of multiple processing units. Because this architecture has an advantage that the complexity and the number of computations per input does not increase as the size of 2-D input data increases, it can process a very large 2-D data efficiently in a near real-time.

TiO₂ 캐패시터의 製造過程에 따른 電氣的 特性에 관한 硏究 : 眞空蒸着 薄膜과 障極酸化 被暝의 差異點 The difference between vacuum evaporation thin film and anodyzing thin film

權熙勳 충주대학교 1984 한국교통대학교 논문집 Vol.18 No.1

Tio₂capacitor was produced by the ways of vacuum evaporwtion thin film and anodyzing thin film, and its experimental results has been studied. The effect of DC conductivity was observed for the three conduction mechonisms, schottky effect in the high electric field, poole-frenkel effect in the medium region and tunnel effect in the low electric field on the experiment of vacuum evaporation thin film. The experiment of anodyzing thin film was not carried out due to its extremthinness. The crystal structure was checked and confirmed by the X-ray diffraction pattern.

다중경로 페이딩체널하에서의 DS/CDMA 시스템의 성능분석

權熙勳,安秉根 충주대 산업과학기술연구소 2000 産業科學論文集 Vol.8 No.-

When a signal is through a multipath fading channel, multiple copies of the original signal will be received due to scattering and reflections in the medium. The amplitude of these independent multipath signals can be time-varing, do can their delays, and phase. Since the variations are largely unpredictable, the multipath fading channel is best described in statistical terms with random and time variant characteristics. In this paper the system modeled DS/CDMA-QPSK system. For the system analyze error probability equation and maximum user number obtained over AWGN channel. System performance analyzed in rayleigh and rician fading over multipath fading channel.

電子科 敎育課程開發에 關한 硏究

權熙勳,安聖洙 忠州大學校 1983 한국교통대학교 논문집 Vol.16 No.2

Korean industrial situations are very rapidly changing. Sophisticate pattern of industry is resulting in the numbers and kind of workers who are need in industry. The more sophisticated the industry, the more crucial the technician's role. In order to educated electronic techician necessary to the electronic industrial society during the short period of two year course of jonior technical college, this paper suggest the educational method and curriculum which are proper to the requirement of radically developing electronic industry. In undertaking the construction of this curriculum for electronic technology based upon job analysis and studying a curriculums, this curriculum promote a good all-round education & trainning in electronic technology which will be enable to find empolyment in a wide variety of positions in electronic industry. This paper look into the problems of the junior technical college and suggest directions method for improvement of the junior technical college education.

格子 構造인 IIR 디지털 필터의 低 電力 VLSI 구현

權熙勳 충주대 산업과학기술연구소 1999 産業科學論文集 Vol.7 No.1

When a digital filter transfer function is implemented using a digital system, the overall input-output behavior is not ideal due to the quantization of signal and coefficients in the system. Much research has been carried out to search for low-sensitivity or low-noise structures. In addition to the finite word-length effects, pipelining is very important in low-power or high sampling rate applications. In this paper, the length of the critical path of the designed WDFs can be chosen optimally depending upon applications such that both the speed requirement and the hardware minimization are satisfied at the same time.

A VLSI Architecture for the Real-Time 3-D Digital Filte

權熙勳 忠州大學校 1995 한국교통대학교 논문집 Vol.30 No.2

A solution to the real-time requirements of digital signal processing is the use of special-purpose architecture. This paper proposes a high performance VLSI architecture for three-dimensional (3-D) digital filter. The architecture is based upon a regular computational structure obtained from a state space model. The variables are as-signed to minimaize the off-chip data communicaiton requirements. Also, this paper describes a processor architecture which uses multiple arithmetic units for high throughput and system configurations for real-time implementation.

웨이브렛 변환을 이용한 신호의 복원

권희훈 충주대학교 2006 한국교통대학교 논문집 Vol.41 No.-

Degradation is generated by digitalization or transmission of data. And its essential cause is noise. Therefore, researches for wavelet-based methods which reconstruct signal degraded by noise have continued. In AWGN environment, the general trend for denoising is to use the thresholding method. These methods only consider statistical characteristic regarding noise reconstructed signal includes a lot of noise because. In this paper, we present a new method which uses the cumulation of wavelet detail coefficients. As a result, reconstruction of edges and denoising performance are improved. Also we compare existing methods using SNR as the standard of judgement of improvemental effect.

Perfilter를 使用한 帶域通過 디지탈 필터의 構成에 關한 硏究

權熙勳 忠州大學校 1985 한국교통대학교 논문집 Vol.19 No.1

A digital filter using prefilter and equalizer is considered. New prefilter for the band pass filter whose center frequency can be controled is proposed and the design methods for the equalized are explained. In this method, comparable reduction of multipliers and low sensitivity for the coefficient quantization are obtained, compared with conventional filter.

LC 사다리형 回路網에서 디지탈 필터를 設計하는 方法에 關한 硏究

權熙勳 忠州大學校 1980 한국교통대학교 논문집 Vol.13 No.1

Recent investigations have shown that digital filter structures can be derived from analog doubly-terminated lossless ladder networks. A design Procedure is given which enables digital filter to be derived directly from ladder LC networks. The derivation is based on an element-by-by element transfer of the ladder components to the digital domain. A specific set of constraints are imposed on the transformations in this Paper so as to satisfy the realisablility. The mannor in which such a transfer is achived is dependent on einear voltage curreut transformation. This paper uses a design method relying on scattering parameters which has already been described by author and by others. Finally an example is talsen to exemplify the this design method.