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정우철,한영열 한국통신학회 1993 韓國通信學會論文誌 Vol.18 No.4
본 논문에서는 기존 차동 복조기의 k개의 연속적인 출력과 k비트 지연된 차동 복조기 출력간의 관계를 MSK 및 GMSK 시스팀에 대하여 고찰하였다. MSK 및 GMSK 의 신호에 대한 k비트 지연 회로를 사용한, k차 복조기의 출력은 기존 차동 복조기의 k개의 연속적인 출력의 곱이다. 이를 수학적인 과정을 통하여 증명하였으며 이러한 관계를 이용하여 Makrakis가 제시한 2비트 지연기를 사용하여 성능을 개선시킬 수 있는 수신기구조를 임의의 비트 지연기를 사용할 수 있는 수신기 구조를 일반화시켰다. 제안된 방식의 오율 성능을 컴퓨터 시뮬레이션을 행하였으며 성능 개선이 됨을 알 수 있었다. In this paper, the relationship between k consecutive outputs of the conventional differential detector and output of differential detector with k-bit delayer MSK and GMSK signal, using a k-bit delay circuit, is the product of k successive output of the conventional differential detector. This relationships are used to generalize the structure of receiver which was proposed by Makrakis using 2-bit delay line. The error rate performance of the proposed method is carried out by computer simulation and significant performance improvement is achieved for differential MSK and GMSK system.
鄭遇喆 全北大學校 1979 論文集 Vol.21 No.-
The industrial development and economical high state growth has contributed to material prosperity of human but the growth of solid waste and the waste quantity of natural resource leads to a result of envionment pollution. From now on the scientific technic have to judgment the melit and demelit producted of its result and resonable co-ordenation and technical assessment is needed to survive human survival inharmony with nature in any way. Especially the technic of reproducting, utilizing limited resouree is indispensable thing for recycle society and it is used in advanced country already. This study, consider the utility technically to utilize enormous solid waste resourse asked in Agricultural side to make land composting and the result studied in Japan is written. The composting will contribute to cleaning administration to treat solid waste and increased procution in country as well as preventing secondary pollution.
鄭遇喆,金煥起,李容源 全北大學校 附設 都市및環境硏究所 1987 都市 및 環境硏究 Vol.2 No.-
This paper analytically compared the water quality data with the effluent flow rate of the pollutent, in Chenju-cheon, during the past fifteen years. 1. The main sorces of pollutron were revealed as the domestic sewage and the industrial wastewater. 2. The yearly average of pollutant concentration has been decreasing but MPN has been incresing for the conversion of flush toilet. 3. ABS concentration has been decresing for the use of soft detergent. 4. The effluent flow rate of discharge was under the control of the geological and topographical property. 5. The discharge rate of BOD and SS was 29% and 6.5% at Hanbukru, 6% and 21% at Dukjinbo, 89% and 69% at Iseongbo.