• 한국전자파학회논문지
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• 제15권5호
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• pp.451-460
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• 2004

W-CDMA 시스템의 파일럿 비트 패턴은 채널 측정 및 프레임 동기 확인에 사용된다. 본 논문은 이러한 파일럿 패턴의 프레임 동기용 이원부호를 제안한다. 프레임 동기 단어라고 불리는 이러한 이원부호의 자기 상관 및 상호 상관 특성을 이용하여 이상적인 프레임 동기 특성을 구할 수 있는 회로를 제안한다. W-CDMA시스템에서는 두 개의 수신 단말기를 갖지 않고도, 다른 주파수의 측정을 가능하게 하기 위한 압축모드(compressed mode)를 두고 있다. 이 모드에서는 10 msec의 한 프레임 시간 동안에 7 슬랏까지 전송이 중단될 수 있는데, 이러한 경우에 제안된 프레임 동기용 이원부호의 우선 쌍 간의 보완 매핑(complementary mapping) 관계를 이용하면, 이상적인 프레임 동기 특성을 유지 할 수 있음을 보인다. 그리고 우선 쌍 개념, 보완 매핑(complementary mapping) 관계, 최대장부호(maximal length sequence) 개념을 이용하여 제안된 프레임 동기 단어를 생성하는 회로에 관하여 논한다.

• Journal of Communications and Networks
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• 제14권3호
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• pp.230-236
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• 2012

Based on the known binary sequence sets and Gray mapping, a new method for constructing quaternary sequence sets is presented and the resulting sequence sets' properties are investigated. As three direct applications of the proposed method, when we choose the binary aperiodic, periodic, and Z-complementary sequence sets as the known binary sequence sets, the resultant quaternary sequence sets are the quaternary aperiodic, periodic, and Z-complementary sequence sets, respectively. In comparison with themethod proposed by Jang et al., the new method can cope with either both the aperiodic and periodic cases or both even and odd lengths of sub-sequences, whereas the former is only fit for the periodic case with even length of sub-sequences. As a consequence, by both our and Jang et al.'s methods, an arbitrary binary aperiodic, periodic, or Z-complementary sequence set can be transformed into a quaternary one no matter its length of sub-sequences is odd or even. Finally, a table on the existing quaternary periodic complementary sequence sets is given as well.

• 한국전자파학회:학술대회논문집
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• 한국전자파학회 2005년도 종합학술발표회 논문집 Vol.15 No.1
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• pp.57-62
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• 2005

In spite of many advantages of OFDM, a major drawback for implementation is a non-linear distortion in the HPA due to a high PAPR problem. In this paper, the Complementary Clipping Transform technique (CCT) for the PAPR reduction of OFDM system is analyzed for the QPSK and QAM mapping data. BER performance and PSD in front of HPA and after HPA are analytically demonstrated.

• 한국식물병리학회지
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• 제10권3호
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• pp.235-239
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• 1994

Viral RNA was extracted from purified Chinese cabbage strain of turnip mosaic virus (TuMV-Ca) from infected leaves of turnip. Polyadenylated genomic viral RNA was recovered by oligo (dT) cellulose column chromatography and used as a template for the synthesis of complementary DNA (cDNA). Recombinant plasmids contained cDNA ranged from about 900 bp to 2, 450 bp were synthesized. Among the selected 41 transformants, pTUCA31 and pTUCA35 had over 2 Kbp cDNA insert. Restriction endonuclease patterns of the clones examined were very similar among them. Clones pTUCA23 and pTUCA31 were overlapped with pTUA35. The longest clone pTUCA35, encoding 3'-end, showed that it contained two sites for EcoRI, and one site for BamHI, ClaI, HincII, SacI and XbaI, respectively. The restriction mapping indicated that the clone pTUCA35 contained partial nuclear inclusion body gene, complete coding region of the coat protein and 3' untranslated region of TuMV-Ca genomic RNA.

• 한국전자파학회논문지
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• 제17권3호
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• pp.272-279
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• 2006

본 논문에서는 W-CDMA(Wide band Code Division Multiple Access) 시스템에서 채널 측정 및 프레임 동기 확인에 사용되는 파일럿 비트 패턴의 프레임 동기 단어(frame synchronization words) 성능을 분석한다. 또한 W-CDMA 시스템에서는 두 개의 수신 단말기를 갖지 않고도, 다른 주파수의 측정을 하기 위해 압축 모드(compressed mode)를 사용한다. 제안된 프레임 동기용 이원 부호의 우선 쌍 간의 보완 매핑(complementary mapping) 관계를 이용하면, 압축 모드에서도 프레임 동기 특성을 유지함을 컴퓨터 시뮬레이션을 통하여 확인한다. 검출 확률과 오 경보 확률을 갖는 수신기 동작 특성(ROC: Reciever Operating Characteristic) 곡선은 LLRT(Log Likely-hood Ratio Test), GLRT(Generalied Likeiyhood Ratio Test), 연판정(soft correlation test), 경 판정(hard correlarion test)과 같은 다양한 검출법(detection metrics)을 이용하여 레일레이 페이딩 채널에서 제안된 프레임 동기 단어의 성능 분석에 사용된다. 이 논문의 파일럿 비트 패턴의 성능에 대한 연구 결과는 3세대 W-CDMA 시스템에서 프레임 동기의 설계 및 구현에 유용한 참고 자료가 될 수 있을 것이다.

• 로봇학회논문지
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• 제18권1호
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• pp.59-65
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• 2023

This paper proposes an Extended and Adaptive Inverse Perspective Mapping (EA-IPM) model that can obtain an accurate bird's-eye view (BEV) from the forward-looking monocular camera on the sidewalk with various curves. While Inverse Perspective Mapping (IPM) is a good way to obtain ground information, conventional methods assume a fixed relationship between the camera and the ground. Due to the nature of the driving environment of the mobile robot, there are more walking environments with frequent motion changes than flat roads, which have a fatal effect on IPM results. Therefore, we have developed an extended IPM process to be applicable in IPM on sidewalks by adding a formula for complementary Y-derive processes and roll motions to the existing adaptive IPM model that is robust to pitch motions. To convince the performance of the proposed method, we evaluated our results on both synthetic and real road and sidewalk datasets.

• Journal of applied mathematics & informatics
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• 제20권1_2호
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• pp.327-343
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• 2006

A general methodology is suggested to solve shelf-space allocation problem of retailers. A multi-item inventory model of breakable items is developed, where items are either complementary or substitute. Demands of the items depend on the amount of stock on the showroom and unit price of the respective items. Also demand of one item decreases (increases) due to the presence of others in case of substitute (complementary) product. For such a model, a Contractive Mapping Genetic Algorithm (CMGA) has been developed and implemented to find the values of different decision variables. These are evaluated to have maximum possible profit out of the proposed system. The system has been illustrated numerically and results for some particular cases are derived. The results are compared with some other heuristic approaches- Simulated Annealing (SA), simple Genetic Algorithm (GA) and Greedy Search Approach (GSA) developed for the present model.

• 한국식물생명공학회:학술대회논문집
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• 한국식물생명공학회 2006년도 한국육종학회 공동심포지엄 및 학술대회
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• pp.36.2-37
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• 2006

• 대한전자공학회논문지TC
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• 제44권2호
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• pp.22-28
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• 2007

높은 PAPR (peak-to-average power ratio)은 OFDM (orthogonal frequency division multiplexing) 신호의 주된 문제점이다. 본 논문에서는 RS (Reed-Solomon) 부호의 소실 복호 기능을 이용한 수정된 SLM (selective mapping) 기법을 제안한다. 송신기에서 RS 부호화된 OFDM 데이터 블록에 일련의 위상 시퀀스를 곱하여 일부의 체크 심볼의 위상을 천이시킨다. 수신기에서 위상 천이된 체크 심볼들을 소실로 간주하여 RS 복호를 수행한다. 그러므로 가장 낮은 PAPR을 갖도록 선택된 위상 시퀀스에 대한 부가 정보를 전송할 필요가 없다. 또한 선택된 위상 시퀀스에 대한 추정 과정이 더 이상 수신기에 필요하지 않게 되어 복잡도와 성능이 향상된다. 제안한 수정된 SLM 기법의 성능을 평가하기 위해 PAPR의 CCDF(complementary cumulative distribution function), BER(bit error rate) 그리고 복호 실패 확률을 기존의 SLM 기법과 비교한다.

• 대한방사성의약품학회지
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• 제1권1호
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• pp.62-73
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• 2015

We developed an evans blue-indocyanine green-$^{99m}Tc$-human serum albumin conjugate for sentinel lymph node mapping and we describe its unique potential usage for clinical implications. This conjugate has combined the strengths of visible blue dye, near-infrared fluorescence and radioisotope into one single conjugate without any additional weakness/disadvantage. All the components of evans blue-indocyanine green-$^{99m}Tc$-human serum albumin are safe and of low cost, and they have already been clinically used. This conjugate was stable in the serum, it showed a long retention time in the lymphatic system and the lymph nodes showed a much higher signal-to-noise ratio after the conjugate was injected intradermally into the paw of mice. Both the single-photon emission computed tomography and near-infrared fluorescent images of the mice were successfully obtained at the same time as the excised sentinel lymph nodes showed blue color. The visual color, near-infrared fluorescence and gamma ray from this agent could be complementary for each other in all the steps of sentinel lymph node sampling: exploring and planning sentinel lymph node before excision with visualization of the exact sentinel lymph node location during an operation. Therefore, the triple modal agent will possibly be very ideal for sentinel lymph node mapping because of the high signal-to-noise ratio for non-invasive imaging and its complementary multimodal nature, easy preparation and safety. It is promising for clinical applications and it may have great advantages over the traditional single modal methods.