• The Journal of Korean Institute of Communications and Information Sciences
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• v.25 no.6B
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• pp.1106-1113
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• 2000

In this, paper, a DFT based polyphase filter bank for the fractional ratio oversampling is proposed. Proper fractional oversampling ratio gives lower aliasing than the critical sampling and, at the same time, lower computational load than the integer ratio oversampling. In addition, filter bank design becomes easier by the reduced aliasing effect of fractional ratio oversampling. Proposed fractional ratio oaversampling polyphase structure is applied to a subband adaptive filter for acoustic echo cancellation where long adaptive filter are ofter required. Echo cancellation results show that fractional ratio oversampling gives comparable performance to the integer ratio oversampling with less computational load.

• Journal of Digital Contents Society
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• v.10 no.2
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• pp.189-198
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• 2009

In this paper, we propose a method to improve the performance of orthogonal frequency division multiplexing (OFDM) receivers by using oversampling the received signals. Demodulation of the received OFDM signals is to detect the amplitude and phase components of the subcarriers. From the oversampled OFDM signals, we can get redundant informations in frequency domain for the data, which are different in phase but the same in amplitude. By using these properties, we can obtain signal to noise ratio (SNR) gain by the oversampling ratio compared to the receivers which sampled with symbol rate. In this paper, we propose oversampled receivers whose oversampling ratio is expanded from integer to general rational number. Through computer simulations, we show the validity of the proposed methods by comparing the performance of the receivers with nonideal band-limiting filters.

• 월간산업보건
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• s.270
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• pp.70-70
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• 2010

산업안전보건법 제43조에 따라 건강진단기관이 작성하여 사업주에게 제공하는 건강진단결과표 중 사후관리소견서(2면)에 기재되는 내용이 근로자의 개인정보에 해당되기 때문에 이를 기재하는 행위는 개인정보보호 관련법령에 위반된다는 일부 주장에 대하여 고용노동부가 개인정보보호관련 법률을 담당하는 행정안전부에 당해 사항의 법령 위반여부에 대한 유권해석을 질의한 바, 산업안전보건법에 의한 사후관리소견서상에 개인정보를 기재하는 것과 이상소견이 있는 지에 대한 검진결과 수치를 기재하는 것 모두 개인정보보호 관련법령에 위반하지 않는다는 내용이 회신되어 이를 안내하오니 업무에 참고하시기 바랍니다.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.14 no.1
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• pp.77-83
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• 2014

Over-sampled discrete wavelet transformation is one way to overcome the disadvantages of the standard wavelet transform of shift invariance even though it increases the number of subband signals. Non-separable based discrete wavelet transform is efficient that it satisfies shift invariance and directional selectivity. In this paper, since efficient over-sampled wavelet transform is possible in a two-dimensional image processing, we show that the proposed method is well applied with performance improvement of digital image and noise removal.

• 주택과사람들
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• s.219
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• pp.60-61
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• 2008

당정이 부동산 세제 개편에 시동을 걸었다. 국민들의 실질 소득은 제자리 걸음인데, 세금만 올리는 것은 국민들에게 지나친 고통을 준다는 기본 취지에서다. 일단 정부와 한나라당은 재산세 과표 적용률을 작년 수준으로 동결할 것이라고 밝혔다. 이와 함께 종부세도 보완하겠다고 발표했다.

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 1995.10a
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• pp.935-938
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• 1995

• 주택과사람들
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• s.202
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• pp.104-105
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• 2007

시가 급등, 과표 적용률 상승 등으로 금년엔 종부세 부담이 훨씬 커질 전망이다. 2006년의 종부세는 납부하든 안 하든 정해진 금액이었지만, 금년의 종부세는 지금부터 대비하면 줄일 수도 있다.

• Journal of the Korean Data and Information Science Society
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• v.27 no.3
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• pp.639-651
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• 2016

"Law on price announcement for real estate" which was revised as of Jan. 19, 2016 (will be enforced as of Sep. 1, 2016) decided the introduction of 'Price announcement system for non-residential property' for the first time. However, its introduction seems to be delayed based on two reasons. Firstly the methodology for introduction of non-property system is not definitized, despite many problems were brought up for current tax base of non-residential property. In addition, changes in tax base will place a burden on the government. In this regard, this study analyzed actual transaction price data throughout one year to analyze equity of taxation for non-residential property and to find major factor which affects on the tax base, in relation with the change of current public announcement system to actual transaction based system. And this is the first study that applied actual transaction price to non-residential property.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.18 no.5
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• pp.1051-1060
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• 2014

In this paper, performance of an orthogonal frequency division multiplexing (OFDM) system in an impulsive noise environment is analyzed. Here, it is verified that performance of the OFDM system with window nonlinearity, which is one of the impulsive noise mitigation algorithms, is dependent on the over-sampling rate and the size of window. With respect to the variation of those parameters, we also provide an appropriate region of threshold values that control amplitudes of the sampled waveform of received signals. As a result, a new combination of parameters which improves error performance of OFDM system in an impulsive noise environment as compared to the previously reported parameters is presented.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.41 no.5
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• pp.91-97
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• 2004

A digital over-sampling noise-shaping coder to achieve the processing accuracy for the audio signal bandwidth is designed. In order to implement an optimized design of the noise-shaping coder as a form of U (intellectual property), circuit design techniques that optimize the multiplication and the ROM architectures are proposed with emphasis on the low-voltage operation under 2.0 V and the minimization of the hardware resources. In the design and verification methodology, the overall architectures and the internal bit width have been determined through behavioral simulations. The overall performances including timing margin have been estimated through transistor-level simulations. Furthermore, the test results of the implemented chip using a 0.35-${\mu}{\textrm}{m}$ standard CMOS process proposed the validity of the proposed circuits and the design methodology.