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안찬호(Chan-ho An),진현보(Hyun Bo Jin),양장훈(Janghoon Yang),박의영(Ui Young Pak),류영재(Young-Jae Ryu),김동구(Dong Ku Kim) 한국통신학회 2013 韓國通信學會論文誌 Vol.38 No.1C
본 논문에서는 지상의 추적 장비들이 무선망으로 연결되어 협력하는 전술형 모노펄스(Monopulse) MIMO 레이더의 성능 향상 기법을 연구하였다. 우선, 기존의 모노펄스 MIMO 레이더에 αβ 필터를 적용하여 각도 다이버시티(Angular Diversity)를 충분히 얻지 못하는 환경에서의 위치추적 성능을 크게 향상시키는 방법을 제안하였다. 또한 필터링 기법과 연계하여 무선망을 이용하는 지상 추적 장비간 피드백(Feedback)을 줄일 수 있는 기법을 제안하였다. In this paper, we proposed an enhanced monopulse MIMO radar system for the tactical scenario where the ground receivers are connected wireless backhaul and closely spaced. By applying the αβ filter to the conventional monopulse MIMO radar, we show that the localization performance can be improved significantly. We also propose an efficient localization algorithm for a system with lower rate feedback. Using numerical simulations, we demonstrate that the proposed scheme can improve the localization performance while reducing the feedback over conventional scheme.
모노펄스 수신기와 필터링을 이용한 지상국 간 협력 UAV 위치 추적에 대한 연구
안찬호(Chan-ho An),김형찬(Hyngchan Kim),박의영(Ui Young Park),류영재(Young-Jae Ryu),김동구(Dong Ku Kim) 제어로봇시스템학회 2011 제어로봇시스템학회 합동학술대회 논문집 Vol.1 No.2
본 논문에서는 지상국(GCS: Ground Control Station)간의 협력을 통해 무인기(UAV: Unmanned Aerial Vehicle의 위치를 추적하는 시스템을 연구하였다. 두 개의 지상국에서 모노펄스(Monopulse)를 통해 신호 입사각을 추적하여, 각 입사각의 교점을 구하면 무인기의 위치를 파악할 수 있다. 이 때 두 지상국 사이의 거리가 충분하지 않으면, 다이버시티(Diversity) 이득을 얻지 못하게 되고 추적 오차가 커지게 된다. 반면 기지국 사이의 거리를 크게 하면, 무인기에서 전송하는 빔폭에서 벗어나게 되어 SNR(Signal-to-Noise Ratio)이 감소되고 기지국 간의 협력이 어려워 실질적 운용에 제약이 된다. 본 논문에서는 운용의 제약성을 고려하여 기지국 간의 거리가 충분하지 않은 경우 필터링을 통하여 추정 오차를 보완할 수 있는 방법을 연구하였다.
생활스포츠 야구동호인의 매니아수준이 스포츠 소비행동에 미치는 영향
안찬호(An, Chan-Ho),한진욱(Han, Jin-Wook),김동규(Kim, Dong-Kyu) 한국체육과학회 2018 한국체육과학회지 Vol.27 No.3
The purpose of this study was to examine the impact of level of mania on sport consumption behaviors and moderating effects of involvement in the relation between level of mania and sport consumption behaviors. In order to accomplish the purpose of the study, a total of 251 samples including the members of a baseball league in Yongin-si, users of amateur baseball team"s internet community and the team members of the “K” university baseball team were selected using convenient sampling method. 228 usable data were analyzed with frequency analysis, confirmatory factor analysis, reliability analysis, correlation analysis and multivariate multiple regression analysis. The results of this study were as follows. Firstly, level of mania had a positive effect on intention to sport consumption behaviors. Secondly, the result did not suggest any moderating effect of involvement in the relation between level of mania and sport consumption behaviors. Discussions and additional implications were also suggested.
생활스포츠지도사 연수 참가자의 연수만족도가 구직효능감 및 기대직업만족도에 미치는 영향
안찬호(An, Chan-Ho),한진욱(Han, Jin-Wook),정은주(Jung, Eun-Ju) 한국체육과학회 2018 한국체육과학회지 Vol.27 No.5
The purpose of this study was to examine the effects of satisfaction for sports instructor training programs on job searching efficacy and expected occupational satisfaction. In order to accomplish the purpose of the study, a total of 267 trainees participating in a sports instructor training program at a university in Seoul was selected using convenient sampling method. All data were utilized in data analysis procedure. Data were analyzed using frequency analysis, confirmatory factors analysis, reliability analysis, descriptive statistics analysis. The result of this study were as follows. Firstly, curriculum content had an influence on the job searching efficacy, while administrative support and learning environment did not. Secondly, curriculum content had a significant impact on the expected occupational satisfaction, however, administrative support and learning environment did not. Thirdly, job searching efficacy significantly affected he expected occupational satisfaction. Discussions and additional implications were also suggested.
New Design for Linear Complex Precoding over ABBA Quasi-Orthogonal Space-Time Block Codes
란롱,양장훈,안찬호,김동구,Ran, Rong,Yang, Jang-Hoon,An, Chan-Ho,Kim, Dong-Ku The Korea Institute of Information and Commucation 2008 韓國通信學會論文誌 Vol.33 No.12C
ABBA codes, a class of quasi-orthognal space-time block codes (QoSTBC) proposed by Tirkkonen and others, allow full rate and a fast maximum likelihood (ML) decoding, but do not have full diversity. In this paper, a linear complex precoder is proposed for ABBA codes to achieve full rate and full diversity. Moreover, the same diversity produce as that of orthogonal space-time block code with linear complex precoder (OSTBC-LCP) is achieved. Meanwhile, the size of the linear complex precoder can be reduced by half without affecting performance, which means the same complexity of decoding as that of the conventional ABBA code is guaranteed.
IPA 기법을 이용한 프로야구 팀 속성에 대한 중요도와 만족도 분석
김동규(Kim, Dong-Kyu),안찬호(An, Chan-Ho),한진욱(Han, Jin-Wook) 한국체육과학회 2018 한국체육과학회지 Vol.27 No.2
The purpose of this study was to provide valuable information on the team"s marketing strategy through IPA analysis on the attributes of professional baseball team. Toward this end, a total of 250 respondents was selected using a quota sampling method and responded to the survey questionnaire. 327 usable data were utilized in data analysis procedure. Data were analyzed using frequency analysis, confirmatory factors analysis, reliability analysis, descriptive statistics analysis and IPA analysis. The result of this study were as follows. Firstly, 1 quadrant included team marks and stadium community. Secondly, 2 quadrant included team success, non-player personnel and team play. Thirdly, 3 quadrant included rival, team"s tradition and concessions. Fourthly, 4 quadrant included social interaction, team characteristics, and commitment. Discussions and additional implications were also suggested.
다수의 지상국(GS)을 이용한 무인 항공기(UAV) 추적 FDOA 기반의 CRLB 성능 분석 연구
민병윤 ( Byoung Yoon Min ),안찬호 ( Chan Ho An ),홍석준 ( Seok Jun Hong ),장진상 ( Jeen Sang Jang ),김동구 ( Dong Ku Kim ) 한국항행학회 2011 韓國航行學會論文誌 Vol.15 No.2
본 논문에서는 다수의 지상국을 이용하여 얻은 FDOA(Frequency Difference of Arrival) 측정값을 통해서 UAV(Unmanned Aerial Vehicle; 무인항공기) 추적 알고리즘의 이론적 경계인 CRLB(Cramer-Rao Lower Bound)를 분석하였다. 첫째로 FDOA 측정값을 시간을 두고 모았을 때 CRLB에 주는 영향을 관찰하였고, 둘째로 지상국이 일정한 범위 안에서 무작위적 위치를 가질 때 그 범위에 따른 FDOA의 측정값이 어떤 특성을 갖는지 확인할 수 있었다. 또한 CRLB의 크기를 측정하여 CCDF(Complementary Cumulative Distribution Function)로 나타내어 성능을 비교, 분석하였다. In this paper, the performances of Cramer-Rao Lower Bound (CRLB) with Frequency Difference of Arrival (FDOA) measurements for Unmanned Aerial Vehicle (UAV) tracking are investigated. We focus on two cases: the influence on CRLB with FDOA measurements collected by time, and random distribution of Ground Stations (GSs). We derived the performance by gauging the size of CRLB through Complementary Cumulative Distribution Function (CCDF). From the simulation results, broader distribution of GSs and FDOA measurements by longer time bring about better performance.