• 대한전자공학회논문지TE
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• 제42권3호
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• pp.39-44
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• 2005

본 논문에서는 견실한 전력선 통신을 위한 5-ary 주파수 편이 키잉 방식을 사용하였다. 5-ary 캐리어중 3 캐리어는 데이터를 송신하기 위해서 사용하는 주파수이며, 115kHz, 120kHz, 125kHz으로, 각각 0.33ms의 송신시간을 할당해 총 영교차점을 기준으로 하여 1ms를 송신을 한다. 수신측에서는 채널 상태를 파악할 수 있는 더미 캐리어를 50kHz, 350kHz를 각각 0.5ms 씩 총 1ms를 추가하였다. 실험 결과 칩 방식과 비교해 볼 때 영 교차점에서의 주파수 천이 키잉 방식이 용량성 부하에 대해 적은 송신 전력으로 더 나은 성능을 가진다.

• 대한전자공학회논문지TE
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• 제37권5호
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• pp.93-102
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• 2000

본 논문은 DAMA-SCPC 위성통신 시스템의 디지털 모뎀의 기능 및 성능 규격들을 제시하고, 제시한 규격을 만족하는 위성모뎀의 구조 설계 및 구현에 대하여 기술한다. 다양하면서 융통성이 요구되는 위성모뎀의 규격들을 만족시키기 위하여 디지털 신호 처리기(DSP)와 프로그래머블 게이트 어레이(FPGA)를 기반으로 하여 설계 및 구현되었다. 구현된 위성모뎀은 DAMA-SCPC 위성통신 시스템에 통합하여 수행한 시험에서 안정된 동작과 제시된 기능 및 성능 규격을 모두 만족함을 검증하였다. 연속모드(at Eb/No=4.7, FEC=3/4) 에서 측정된 BER은 약 1×10E-4의 성능을 보여 주었다.

• ETRI Journal
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• 제34권5호
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• pp.649-654
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• 2012

This paper presents a novel 16-quadrature-amplitude-modulation (QAM) E-band communication system. The system can deliver 10 Gbps through eight channels with a bandwidth of 5 GHz (71-76 GHz/81-86 GHz). Each channel occupies 390 MHz and delivers 1.25 Gbps using a 16-QAM. Thus, this system can achieve a bandwidth efficiency of 3.2 bit/s/Hz. To implement the system, a driver amplifier and an RF up-/down-conversion mixer are implemented using a $0.1{\mu}m$ gallium arsenide pseudomorphic high-electron-mobility transistor (GaAs pHEMT) process. A single-IF architecture is chosen for the RF receiver. In the digital modem, 24 square root raised cosine filters and four (255, 239) Reed-Solomon forward error correction codecs are used in parallel. The modem can compensate for a carrier-frequency offset of up to 50 ppm and a symbol rate offset of up to 1 ppm. Experiment results show that the system can achieve a bit error rate of $10^{-5}$ at a signal-to-noise ratio of about 21.5 dB.

• 한국의류학회지
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• 제30권2호
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• pp.326-337
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• 2006

Self-immersed narcissism image that had been limited only a feminine image has being represented as a new masculinity image through various fashion magazine and TV advertisements. Besides, this makes a contribution of enlargement of concern about the beauty and fashion of the male. In the past, fashion has been created through the fetishism about the female body. But, new male image has been changed during only 30-40 years compared with the traditional various social, cultural, sexual body images had been changed for a long time. On the contrary, changed modem male image removes the interval of difference between the male and the female image. Now, representative techniques of the masculinity perform both accommodation and disobedience against social and cultural rules. Social body, which has been understood that appearance represents almost all things, makes the good use of the space of discipline and reformation. This paper is tended to grasp the characteristics of male body image expressed modem male fashion and TV advertisements based on the examination about the changed male body image.

• 디지털산업정보학회논문지
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• 제9권2호
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• pp.81-87
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• 2013

In this paper, we present an implementation of Long Term Evolution (LTE) Uplink (UL) system on a Software Defined Radio (SDR) platform using a conventional Personal Computer (PC), which adopts Graphic Processing Units (GPU) and Universal Software Radio Peripheral2 (USRP2) with URSP Hardware Driver (UHD) for SDR software modem and Radio Frequency (RF) transceiver, respectively. We have adopted UHD because UHD provides flexibility in the design of transceiver chain. Also, Cognitive Radio (CR) engine have been implemented by using libraries from UHD. Meanwhile, we have implemented the software modem in our system on GPU which is suitable for parallel computing due to its powerful Arithmetic and Logic Units (ALUs). From our experiment tests, we have measured the total processing time for a single frame of both transmit and receive LTE UL data to find that it takes about 5.00ms and 6.78ms for transmit and receive, respectively. It particularly means that the implemented system is capable of real-time processing of all the baseband signal processing algorithms required for LTE UL system.

• 한국실내디자인학회논문집
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• 제13권6호
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• pp.12-19
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• 2004

Mies van der Rohe is still known as the architect whose influence is the largest among modem architects. As his work is typical of modern architecture, the architecture of Mies shows an interest in materials and techniques, even though It established the new architectural world by glass and iron, and only transparency is emphasized with glass. So it is blame for the loss of peculiarity a result of thinking In the way of sachlich with expression and structure of material and hierarchical relation. Vincent Scully has insist on that an appearance of modem architecture be occur not by simply a technical request of a technician but by reflection of the times and times' spirit. In this means, the works of Mies is the trial to express the new times' spirit that the new times order and an understanding of material properties about glass with new material of modern. For that, this study tries to consider that Mies'work is the new trial through reflection of material to express about the bstraction beyond the limit of sachlich expression, on the point of expresslonal characteristics of material shown in plan of the Barcelona Pavilion and skyscraper and on the basis of the theory of Gottfried Semper and Karl Boetticher that architectural surface Is a medium which can define space and also express mass.

• 한국실내디자인학회논문집
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• 제20권4호
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• pp.46-53
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• 2011

Popular culture in modem society is that research is to understand the lives of the public. Since post-modem ism, in a clear perspective of the rapidly developing modern society, and the appearance of various societies have been drawn. Of the phenomenon is playing a large role in the admission of the public can see this was: strange places for the properties in the popular culture to analyze and find the meaning makes carry through their own perspective. It also dominates the field of spatial design for the public to understand cultural perspectives and positions should be aware of the importance of thinking. The relationship between spatial design and popular culture, modern society has become an essential point is changed popular culture that has more space, the design characteristics of the new changes will affect their position. In this study, playing a large role in the modern of culture properties, spatial design, looking at areas of social and cultural positions that are clearly focused. Therefore, the cultural phenomenon here in the popular culture of the design characteristics of the space, according to the visual design direction of modern society present in the space is presented.

• 복식
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• 제51권5호
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• pp.45-59
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• 2001

The purpose of this study is to investigate the religious motive and to clarify the relation between religion and fashion and to predict the trends in the future fashion by analyzing the religious motive in the aspects of inner meanings and methods. 1. We can see ego-superiority as inner meanings of religious motive is expressed mysterious image. Mysterious feeling is reflected in modem fashion in the form of the transparency of light and mysterious color in religious painting that is reemerged as a gorgeous and luxurious sense or it is reflected in modern fashion in the form of borrowing grand ways of art and elements of clothing. And this results from longing for aristocratic gorgeousness and from desire for light that is based on love and salvation. 2. We can see religious motive in modern fashion is a will to be converted to religion because of fin de sie-cle anxiety, and this is reemerged in modem fashion as borrowing of religious symbols in the casual wear or as combination of sacred religious motive with vulgar image and they are going to get mental satisfaction by this. 3. Religious motive has the inner meanings of ethic completion and this is reemerged through covering bodies, minimizing details and using dark tone color by having an inspiration in religious clothing. And this results from antipathy to extreme gorgeousness of modern fashion and excessive exposure and from mental desire for returning to an inner nature.

• 한국생활과학회지
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• 제15권2호
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• pp.303-316
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• 2006

The present study deals with developing a new modem design of quilt which is characteristic of Korean traditional patterns. The goal of this study is to make some samples of the pattern as a basic motive of quilt work by using some Korean traditional patterns that could be found in roof tiles, windows, Neung-Hwa (a kind of wood cut for printing book covers), and others. This study examines the concept of quilts, their historical background, and their characteristics. This study also examines traditional patterns that are applicable to the patchy work of quilt, discussing the characteristic of both the Korean patterns and Nubi (Korean traditional quilt). In the process of pattern development, the original patterns were simplified and transformed to apply them to the modem quilt pattern. Fabrics (100% cotton) of similar colors were used to emphasize quilting lines. This study has found followings; 1) The geometric pattern usually consists of dots, lines, and faces. These patterns are suitable for pieced quilts. 2) The curvilinear pattern found in roof tiles or Yi-Dynasty coins, can be easily re-expressed by the applique technique. Combinations of fabrics and motive compositions can express quilts in realistic and creative ways. 3) Addition of Korean traditional quilt techniques, such as parallel lines or swastika stitches, to the traditional object-derived quilt patterns led to the creation of images close to the already existing Korean quilt, Nubi.

• 한국음향학회지
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• 제24권1호
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• pp.38-42
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• 2005

기존의 음성신호와 다른 주파수 대역을 사용하여 데이터 통신이 가능한 ADSL 모뎀 송수신단의 CMOS 아날로그 저역 능동필터를 각각 설계하여 제안하였다. 설계된 필터는 2.5V의 저전압 동작이 가능하며, 각각의 설계사양에 따라 송신단에서는 138kHz의 차단주파수값을 갖는 저역통과 능동필터가 수신단에서는 1,100kHz의 차단주파수 특성을 갖는 저역통과능동필터가 설계 되었다. 이득과 단위이득주파수 특성 면에서 개선된 high-swing cascode방식의 저전압 능동소자가 필터를 설계하기 위한 기본 블록으로 이용되었다. 제안된 소자와 설계 제안된 필터는 $0.251{\mu}m\;CMOS\;n-well$ 공정 파라미터를 이용하여 그 특성이 검증되었다.