• Title, Summary, Keyword: post-digital generation

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Efficient Frame Synchronization Detector and Low Complexity Automatic Gain Controller for DVB-S2 (효율적인 디지털 위성 방송 프레임 동기 검출 회로 및 낮은 복잡도의 자동 이득 제어 회로)

  • Choi, Jin-Kyu;Sunwoo, Myung-Hoon;Kim, Pan-Soo;Chang, Dae-Ig
    • Journal of the Institute of Electronics Engineers of Korea SD
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    • v.46 no.2
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    • pp.31-37
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    • 2009
  • This paper presents an efficient frame synchronization strategy with the identification of modulation type for Digital Video Broadcasting-Satellite second generation (DVB-S2). To detect the Start Of Frame (SOF) and identify a modulation mode at low SNR, we propose a new correlator structure and a low complexity Automatic Gain Controller (AGC). The proposed frame synchronization architecture can reduce about 93% multipliers and 89% adders compared with the direct implementation of the Differential - Generalized Post Detection Integration (D-GPDI) algorithm which is very complex and the proposed a low complexity AGC consists of only 5 multipliers and 3 adders. The proposed architecture has been thoroughly verified on the Xilinx Virtex II FPGA board.

Performance Evaluation of a Next Generation European Digital Terrestrial Television Broadcasting System(DVB-T2) (차세대 유럽형 디지털 지상파 방송 시스템 성능 분석)

  • Jeon, Eun-Sung;Seo, Jung-Wook;Kim, Dong-Ku
    • The Journal of Advanced Navigation Technology
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    • v.15 no.1
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    • pp.61-68
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    • 2011
  • DVB-T2 system developed by DVB project is the next generation digital terrestrial television broadcasting standard designed for offering HDTV service in a post-Analog Switch Off (AOS) environment. In this paper, the performance of DVB-T2 is evaluated with the help of computer simulation. The bits error rate(BER) performance is studied in both AWGN, Rayleigh, Ricean and 0db-echo channel. Firstly, we will give a brief introduction to DVB-T2 system and then compare its BER performance to that of Implementation Guideline.

A Comparative Study on Factors Affecting Intergenerational Smartphone Use: Focusing on the New Silver Generation and the Net Generation (세대간 스마트폰 사용에 영향을 미치는 요인에 관한 비교·연구: 뉴실버 세대와 넷 세대를 중심으로)

  • Lee, Chunghun;Jeong, Jaewook;Lee, Choong Cheang
    • The Journal of Information Systems
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    • v.23 no.4
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    • pp.49-74
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    • 2014
  • The introduction of smartphone caused the most revolutionary change in the domestic telecommunications market after the digital revolution. However, due to the saturation of the local market, it is expected to post negative growth in 2016 and the sales of national communication carriers is in stasis. Thus, the smartphone industry is starting to shift its marketing efforts to secure the silver generation who still has room for increase in the rate of smartphone usage. As the silver generation has physical limitations and differences in needs, the marketing strategy based on the smartphone utilization is not appropriate. This study suggests the new silver generation, who has high income level and similar characteristics to the younger generation, as the new customer segment for smartphone. We analyze the effects of the major variables of UTAUT on smartphone use, as well as examine how these relationships differ between the new silver and the net generation. We verified the hypotheses using a survey with 309 smartphone users. The research findings supported the hypotheses regarding the effects of performance expectancy, effort expectancy and facilitating conditions on smartphone use, but did not support the hypothesis on the effect of social influence. The result of the group comparisons showed that both generation have similar characteristics on innovativeness and cognitive absorption, but the moderating effect of age on performance expectancy, effort expectancy and use is stronger in conjunction with the new silver generation. The study results are expected to be used in establishing a marketing strategy for the new silver generation.

A Study on the Synchronous Signal Detection and Error Correction in Radio Data System (RDS 수신 시스템에서 동기식 신호복원과 에러정정에 관한 연구)

  • 김기근;류흥균
    • Journal of the Korean Institute of Telematics and Electronics A
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    • v.29A no.8
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    • pp.1-9
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    • 1992
  • Radio data system is a next-generation broadcasting system of digital information communication which multiplexes the digital data into the FM stereo signal in VHF/FM band and provides important and convenient service features. And radio data are composed of groups which are divided into 4 blocks with information word and check word. In this paper, radio data receiver is developed which recovers and process radio data to provide services. Then we confirm that 7dB SNR is required to be 10S0-5TBER of demodulation. Deconding process of shortened-cyclic-decoder has been simulated by computer. Also, the time-compression (by 16 times) method has been adopted for the RDS features post-processing. Via the error probability calculation, simulation and experimentation, the developed receiver system is proved to satisfy the system specification of EBU and implemented by general logic gates and analog circuits.

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Design and Implementation of Parabolic Speed Pattern Generation Pulse Motor Control Chip (포물선 가감속 패턴을 가지는 정밀 펄스 모터 콘트롤러 칩의 설계 및 제작)

  • Won, Jong-Baek;Choi, Sung-Hyuk;Kim, Jong-Eun;Park, Jone-Sik
    • Proceedings of the KIEE Conference
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    • pp.284-287
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    • 2001
  • In this paper, we designed and implemented a precise pulse motor control chip that generates the parabolic speed pattern. This chip can control step motor[1], DC servo[2] and AC servo motors at high speed and precisely. It can reduce the mechanical vibration to the minimum at the change point of a degree of acceleration. Because the parabolic speed pattern has the continuous acceleration change. In this paper, we present the pulse generation algorithm and the parabolic pattern speed generation. We verify these algorithm using visual C++. We designed this chip with VHDL(Very High Speed Integrated Circuit Hardware Description Language) and executed a logic simulation and synthesis using Synopsys synthesis tool. We executed the pre-layout simulation and post-layout simulation with Verilog-XL simulation tool. This chip was produced with 100 pins, PQFP package by 0.35 um CMOS process and implemented by completely digital logic. We developed the hardware test board and test program using visual C++. We verify the performance of this chip by driving the servo motor and the function by GUI(Graphic User Interface) environment.

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A Study on the Beauty Educational Method for Post Digital Generation (포스터 디지털세대를 위한 미용교육 방법 연구)

  • Yun, Un-Jae
    • Journal of Digital Convergence
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    • v.11 no.10
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    • pp.701-710
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    • 2013
  • The purpose of this study is to lead the post digital generation of professional beautician training purpose is to find an efficient educational method. Beauty Education Facaility survey conducted in the center of reminders and educational statistics (

    note) and, thereby, Seoul, Daejeon, Chungcheong and Gyeonggi and beauty-related high schools and colleges, universities, graduate schools in the study from June 10, 2013 July 31 to one of the online survey after having KSDC, KSDC online statistical analysis is to identify the actual situation by. Through this study, unlike other studies beauty training colleges, graduate schools, universities and high schools were opened in order, the future belongs to the Department of Health Science or Art as areas of growth that was observed. Statistical results ([Fig. 1, 2, 3, 4, 5] note) similar to the previous studies, but the rise in the proportion of male students, majors, the beauty of the segmentation and high school education is not the beginning of the percentage of high school increased so that it was able to find the differences. This study is to be excuse inadequacy of date selection for only certain number of beauty educational facilities, the learner-centered surveyors, and a lack of ditailled educational curriculum and in-depted researched on educational method, which it is to modofied and supplement in future.

  • Rethinking Korean Women's Art from a Post-territorial Perspective: Focusing on Korean-Japanese third generation women artists' experience of diaspora and an interpretation of their work (탈영토적 시각에서 볼 수 있는 한국여성미술의 비평적 가능성 : 재일동포3세 여성화가의 '디아스포라'의 경험과 작품해석을 중심으로)

    • Suh, Heejung
      • The Journal of Art Theory & Practice
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      • no.14
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      • pp.125-158
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      • 2012
    • After liberation from Japanese colonial rule in 1945, there was the three-year period of United States Army Military Government in Korea. In 1948, Democratic People's Republic of Korea, and Republic of Korea were established in the north and south of the Korean Peninsula. The Republic of Korea is now a modern state set in the southern part of the Korean. We usually refer to Koreans as people who belong to the Republic of Korea. Can we say that is true exactly? Why make of this an obsolete question? The period from 1945 when Korea was emancipated from Japanese colonial rule to 1948 when the Republic of Korea was established has not been a focus of modern Korean history. This three years remains empty in Korean history and makes the concept of 'Korean' we usually consider ambiguous, and prompts careful attention to the silence of 'some Koreans' forced to live against their will in the blurred boundaries between nation and people. This dissertation regards 'Koreans' who came to live in the border of nations, especially 'Korean-Japanese third generation women artists'who are marginalized both Japan and Korea. It questions the category of 'Korean women's art' that has so far been considered, based on the concept of territory, and presents a new perspective for viewing 'Korean women's art'. Almost no study on Korean-Japanese women's art has been conducted, based on research on Korean diaspora, and no systematic historical records exist. Even data-collection is limited due to the political situation of South and North in confrontation. Representation of the Mother Country on the Artworks by First and Second-Generation Korean-Japanese(Zainich) Women Artists after Liberation since 1945 was published in 2011 is the only dissertation in which Korean-Japanese women artists, and early artistic activities. That research is based on press releases and interviews obtained through Japan. This thesis concentrates on the world of Korean-Japanese third generation women artists such as Kim Jung-sook, Kim Ae-soon, and Han Sung-nam, permanent residents in Japan who still have Korean nationality. The three Korean-Japanese third generation women artists whose art world is reviewed in this thesis would like to reveal their voices as minorities in Japan and Korea, resisting power and the universal concepts of nation, people and identity. Questioning the general notions of 'Korean women' and 'Korean women's art'considered within the Korean Peninsula, they explore their identity as Korean women outside the Korean territory from a post-territorial perspective and have a new understanding of the minority's diversity and difference through their eyes as marginal women living outside the mainstream of Korean and Japanese society. This is associated with recent post-colonial critical viewpoints reconsidering myths of universalism and transcendental aesthetic measures. In the 1980s and 1990s art museums and galleries in New York tried a critical shift in aesthetic discourse on contemporary art history, analyzed how power relationships among such elements as gender, sexuality, race, nationalism. Ghost of Ethnicity: Rethinking Art Discourses of the 1940s and 1980s by Lisa Bloom is an obvious presentation about the post-colonial discourse. Lisa Bloom rethinks the diversity of race, ethnicity, sexuality, and gender each artist and critic has, she began a new discussion on artists who were anti-establishment artists alienated by mainstream society. As migration rapidly increased through globalism lead by the United States the aspects of diaspora experience emerges as critical issues in interpreting contemporary culture. As a new concept of art with hybrid cultural backgrounds exists, each artist's cultural identity and specificity should be viewed and interpreted in a sociopolitical context. A criticism started considering the distinct characteristics of each individual's historical experience and cultural identity, and paying attention to experience of the third world artist, especially women artists, confronting the power of modernist discourses from a perspective of the white male subject. Considering recent international contemporary art, the Korean-Japanese third generation women artists who clarify their cultural identity as minority living in the border between Korea and Japan may present a new direction for contemporary Korean art. Their art world derives from their diaspora experience on colonial trauma historically. Their works made us to see that it is also associated with postcolonial critical perspective in the recent contemporary art stream. And it reminds us of rethinking the diversity of the minority living outside mainstream society. Thus, this should be considered as one of the features in the context of Korean women's art.

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    A study on the design of a K-band harmonic oscillator using voltage controlled dielectric resonance (전압제어 유전체공진을 이용한 K-대역 발진기 설계에 관한 연구)

    • 전순익;김성철;은도현;차균현
      • The Journal of Korean Institute of Communications and Information Sciences
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      • v.21 no.12
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      • pp.3215-3226
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      • 1996
    • In this paper a K-band harmonic oscillator competitive to ordinary Push-Push type oscillators is introduced. This oscillator is composed of two-X-band dielectric resonance circuits. To favor its harmonic generation, the load effect and the bias effect are studied to allow the maximum harmonic distortion. As results, the dielectric resonated load and the class A bias are used for the 2nd harmonic generation. analytical study for modelling of voltage controlled dielectric resonator is carried out with theoretical background. The performance of the circuit is evaluated by simulation using harmonic balanced method. The novel structure has ont only a voltage tuning circuit but also an output port at fundamental frequency as the function of prescaler for phase lockede loop application on the just single oscillation structure. In experimentation, the output freqneyc of the 2nd harmonic signal is 20.5GHz and the maximum power level of output is +5.5dBm without additional post amplifiers. the harmonic oscillator exhibits -30dBc of high fundamental frequency rejection without added extra filters. The phase noise of -90dBc/Hz at 100kHz off-carrier has been achieved under free running condition, that satisfies phase noise requirement of IESS 308. The proposed oscillator may be utilized as the clean and stable fixed local oscillator in Transmit Block Upconvertor(TBU) or Low oise Block downconvertor(LNB) for K/Ka-band digital communications and satellite broadcastings.

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    A Study on the Development of National Defense Leadership through the Change of Civil-Military Relationships (민군관계의 변화와 국방리더십의 발전방안에 관한 연구)

    • Lee, Chang-Gi
      • The Journal of Military Studies
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      • pp.83-118
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      • 2006
    • This study is to develop digital leadership in a field of national defense. Today, korean society is facing the crisis of national security. But national defense leadership is not show in the circumstance of national security crisis. As you know, national defense leadership is a process that make use of influence. Which means it converges people's interest and demands well and also show people the right vision of national defense and make them to comply the policy about national security. Because of the environmental change, our national defense leadership is having a new turning point. First, international order, which is under post-cold war, raises possibility of guarantee of peace and security in international society but also, cause the increase of multiple uncertainty and small size troubles in security circumstance. In addition, Korean society is rushing into democratization and localization period by success in peaceful change of political power went through about three times. The issue of political neutralization of military is stepping into settlement but still, negative inheritance of old military regime is worrying about it. In this situation, we can't expect rise in estimation about the importance of security and military's reason for being. So, military have to give their concern to not only internal maintenance of order and control and growth of soldiers but also developing external leadership to strength influence to society and military's the reason for being. So for these alternative I'm suggesting a digital leadership of national defense which fits digital era. This digital leadership is the leadership which can accept and understand digital technology and lead the digital organization. To construct digital national defense we need a practical leadership. The leadership has to be digital leadership with digital competence that can direct vision of digital national defense and carry out the policy. A leader who ha s digital leadership can lead the digital society. The ultimate key to construct digital government, digital corporate and digital citizen depends on digital leader with digital mind. To be more specific, digital leadership has network leadership, next generation leadership, knowledge driven management leadership, innovation oriented leadership. A leader with this kind of leadership is the real person with digital leadership. From now on, to rise this, we have to build up human resource development strategy and develop educational training program.

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    Automatic Generation of a Configured Song with Hierarchical Artificial Neural Networks (계층적 인공신경망을 이용한 구성을 갖춘 곡의 자동생성)

    • Kim, Kyung-Hwan;Jung, Sung Hoon
      • Journal of Digital Contents Society
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      • v.18 no.4
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      • pp.641-647
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      • 2017
    • In this paper, we propose a method to automatically generate a configured song with melodies composed of front/middle/last parts by using hierarchical artificial neural networks in automatic composition. In the first layer, an artificial neural network is used to learn an existing song or a random melody and outputs a song after performing rhythm post-processing. In the second layer, the melody created by the artificial neural network in the first layer is learned by three artificial neural networks of front/middle/last parts in the second layer in order to make a configured song. In the artificial neural network of the second layer, we applied a method to generate repeatability using measure identity in order to make song with repeatability and after that the song is completed after rhythm, chord, tonality post-processing. It was confirmed from experiments that our proposed method produced configured songs well.