PAPR Reduction with a Recoverable Peak Cancellation Technique for OFDM

왕뢰,윤동원,박상규,Wang, Lei,Yoon, Dong-Weon,Park, Sang-Kyu The Korea Institute of Information and Commucation 2008 韓國通信學會論文誌 Vol.33 No.5A

Orthogonal Frequency Division Multiplexing(OFDM) is one of the most promising techniques for 4th generation communication systems. One of the main disadvantages of OFDM is the Peak to Average Power Ratio(PAPR). In this paper, a recoverable peak cancellation(RPC) technique that recovers the cancelled part for the peak-cancelled OFDM signal is introduced. Using the RPC technique, the bit error rate(BER) performance can be greatly improved and the efficiency of the PAPR reduction is nearly that of the clipping method, at a cost of slightly reducing the transmission data rate.

Side Information Transmission Using Pilot Tones for PAPR Reduction of OFDM Signal

왕뢰,윤동원,박상규,Wang, Lei,Yoon, Dong-Weon,Park, Sang-Kyu The Korea Institute of Information and Commucation 2008 韓國通信學會論文誌 Vol.33 No.4A

One of the maindisadvantages of Orthogonal Frequency Division Multiplexing (OFDM) is the Peak to Average Power Ratio (PAPR) problem. To reduce PAPR and improve the error performance of the OFDM signal over a fading channel, an OFDM system combining an Adaptive Symbol Selection Scheme (ASSS) and channel estimation can be used. Because of the side information of ASSS, however, the data rate decreases in the conventional ASSS OFDM system. In this letter, to overcome this impairment, we propose a technique to transmit side information by using pilot tones, and demonstrate that the proposed technique can give reasonable bit error rate (BER) performance.

論陶瓷在中國當代書法創作中的應用和表現研究

왕뢰(Wang Lei),박재연(Park Jae Yeon) 한국전시산업융합연구원 2020 한국과학예술융합학회 Vol.38 No.5

Chinese calligraphy and ceramics have a long history and rich cultural heritage. Calligraphy has long been written or carved on ceramic surfaces, as a mark, or for decoration, and has remained in a subordinate status, which continues to this day. Nowadays, the homogenization and formalization of artworks are becoming increasingly serious, and it is difficult for artworks lacking tension and attraction to attract too much attention and demand. Therefore, "cross-border" creation has become a new solution and trend, "ceramic calligraphy" came into being. Compared with the situation abroad, contemporary Chinese ceramic art creation is still the inheritance and continuation of tradition, and generally lacks the deep sense of innovation and design. It is rare to find artists who can "cross the boundary" between the creation concept of contemporary calligraphy and the production of ceramics. Although the concept of "ceramic calligraphy" has been put forward for a long time, so far the relevant theoretical research and work production are still in the exploratory stage. To solve above problems, based on a large number of relevant literature review is put forward on the basis of redefinition of "ceramic calligraphy art form", and under this definition, to present contemporary calligraphy for the purpose, with the help of ceramic production technology to achieve "ceramic" calligraphy show, again through the work of validation of the proposed theory and perfect.The research shows that the definition of "ceramic calligraphy" is scientific and reasonable. Ceramic is an effective carrier and means to express contemporary calligraphy, which has its unique value and rule, promoting the feasibility of innovative presentation of contemporary calligraphy in three-dimensional space, which also means that calligraphy has changed from the decoration on ceramics to the subject of artistic creation using ceramic materials.

Side Information Transmission Using Pilot Tones for PAPR Reduction of OFDM Signal

Lei Wang(왕뢰),Dongweon Yoon(윤동원),Sang Kyu Park(박상규) 한국통신학회 2008 韓國通信學會論文誌 Vol.33 No.4A

One of the maindisadvantages of Orthogonal Frequency Division Multiplexing (OFDM) is the Peak to Average Power Ratio (PAPR) problem. To reduce PAPR and improve the error performance of the OFDM signal over a fading channel, an OFDM system combining an Adaptive Symbol Selection Scheme (ASSS) and channel estimation can be used. Because of the side information of ASSS, however, the data rate decreases in the conventional ASSS OFDM system. In this letter, to overcome this impairment, we propose a technique to transmit side information by using pilot tones, and demonstrate that the proposed technique can give reasonable bit error rate (BER) performance.

헌법의 빈번한 수정 및 점진적 개혁

王磊 (Wang Lei) 한국헌법학회 2010 憲法學硏究 Vol.16 No.3

어쩌면 우리는 중국을 헌법을 많이 만들어내는 나라라고 부를 수도 있을 것이다. 청(清)말 이래, 중국은 끊임없이 헌법 제정과 수정의 과정을 반복해왔기 때문이다. 1908년 <흠정헌법대강>부터 1949년 <공동강령>이 나온 41년 동안, 중국은 15개 헌법 혹은 헌법의 성격을 띤 문건을 반포하였다. 2년 반 마다 헌법 혹은 헌법의 성격을 띤 문건을 반포한 셈이다. 1)만약 우리가 그 시간의 범위를 신 중국 건국 이후로까지 늘린다면, 그 이후에 4개의 헌법이 발표되었기 때문에 1908년~1982년의 74년 동안 중국은 총 16개 헌법을 발표한 것이 된다. 즉 근 5년마다 한 번씩 헌법을 공포한 것이다. 1980년 이래 입헌사를 돌이켜보면, 중국 헌법의 변경이 지나치게 잦았다는 것을 알 수 있다. 중국 사회 발전의 두드러진 특징 중 하나가 바로 헌법의 제정 및 수정과 함께 이루어졌다는 것이며, 이것은 오늘날까지도 여전히 이어지고 있다. 우리는 헌법 제정이 혁명의 결과이며, 헌법 수정은 정치 운동 또는 개혁의 결과물이라고 할 수 있을 것이다. 1908년~1949년의 헌법의 잦은 변경은 중국의 혁명과 전쟁으로 빚어진 것이라 할 수 있다. 청 말 자산 계급 혁명, 군벌 혼전, 국민당과 공산당 간의 내전이 그 예이다. 1949년 이후, 즉 1954년~1982년 시기의 헌법의 잦은 변경은 정치 운동으로 야기된 것이다. 1966년~1976년의 ‘문화대혁명’이 아주 좋은 예이다. 중국의 현행 헌법, 즉 1982년 이후 잦은 헌법의 수정은 중국이 진행하고 있는 점진적 개혁의 결과로 촉발된 것이라 할 수 있다. 중국의 경제 체제 개혁, 농촌 개혁 등을 그 예로 들 수 있다. 본 문에서는 1949년 신 중국 건국 이후의 헌법 수정, 특히 현행 헌법의 1982년 헌법의 수정 상황을 집중적으로 다룰 것이다.

한류 화장품 광고모델의 특성이 브랜드 개성과 브랜드 태도에 미치는 영향 - 중국 소비자를 중심으로 -

왕뢰 ( Lei Wang ),이진화 ( Jin Hwa Lee ) 한국의류산업학회 2018 한국의류산업학회지 Vol.20 No.5

The purpose of this study is to analyze the effect of characteristics of advertising model on brand personality and the effect of brand personality on brand attitude; and analyze whether the characteristics of the advertising model have a direct effect on the brand attitude or indirectly through the brand personality. A survey was conducted from August 10, 2017 until August 31, 2017, and 400 respondents’ survey results were analyzed. For data analysis, SPSS 23.0 was utilized to perform descriptive statistics, factor analysis, t-test, and regression analysis. As a result, five brand personality factors were derived, which are aesthetics, safety/expertise, sophistication, pro-environment, youth, respectively. For advertising model characteristics, seven factors were derived, which are credibility, visibility, attractiveness, expertise, similarity, likeability, and familiarity, respectively. This study investigated the relationship between characteristics of cosmetics advertising model, brand personality, and brand attitude. Brand personality does not play a mediating role between advertising model’s characteristics and brand attitude. Advertising model’s characteristics have a direct effect on the brand attitude. Consequently, Cosmetics companies should recognize the importance of the characteristics of advertising model and implement the marketing strategy by carefully selecting the advertising model so that consumers can relate the characteristics of advertisement model to the brand attitude which will ultimately lead to positive evaluation of the brand.

중국 소비자의 상조서비스 선택특성과 이용의도에 관한 연구 -소비자 특성(전통적 가치관, 체면민감성, 편의성)을 중심으로-

손설문 ( Sun Xue Wen ),박상수 ( Park Sang Soo ),양연 ( Yang Juan ),왕뢰 ( Wang Lei ) 한중사회과학학회 2022 한중사회과학연구 Vol.20 No.4

본 연구에서는 중국 소비자를 대상으로 상조회사의 장례용품의 선택특성(경제성, 다양성, 포맷)과 장례회사의 서비스 선택특성(적합성, 전문성, 대응성)이 지각된 유용성과 이용의도/추천의도 간에 미치는 영향에 대해 살펴보았다. 이울러 상조회사에 대한 인식과 소비자 특성(전통적 가치관, 체면 민감성, 편의성)에 따른 조절효과와 상조회사 이용경험(직접/간접)에 따른 경로분석 결과의 차이를 살펴보기 위해 다중집단 분석을 실시하였다. 분석결과는 다음과 같다. 첫째, 전체 구조모형의 경로 분석결과에서는 장례용품의 선택특성(경제성, 다양성, 포맷) 3개 요인 중 ‘경제성’과 ‘포맷(디자인/레이아웃 등)’이 지각된 유용성’에 정(+)의 영향을 미치는 것으로 나타났다. 상조회사의 서비스특성(적합성, 전문성, 대응성) 3개 요인은 모두 지각된 유용성에 정(+)의 영향을 미치는 것으로 나타났으며, 지각된 유용성은 이용의도와 추천의도에 모두 정(+)의 영향을 미치는 것으로 나타났다. 둘째, 조절효과 검증결과에서는 상조회사에 대한 인식(긍정적/부정적)의 경우, 지각된 유용성과 이용의도 및 추천의도 간에는 조절효과가 확인되었다. 소비자의 특성(전통적 가치관, 체면 민감성, 편의성)에 따른 조절효과 검증결과에서는 소비자의 특성 3개 요인 모두 장례용품의 선택특성과 지각된 유용성간에서 조절효과가 있는 것으로 나타났으며, 편의성의 경우는 서비스 선택특성(적합성, 전문성, 대응성)중 적합성과 지각된 유용성 간에서도 조절효과가 유의한 것으로 나타났다. 한편, 지각된 유용성과 이용의도/추천의도 간 소비자의 특성(전통적 가치관, 체면 민감성, 편의성)에 따른 조절효과에서는 추천의도에서만 ‘전통적 가치관’이 조절효과가 유의한 것으로 나타났다. 셋째, 상조회사 이용경험 (직접/ 간접)에 따른 두 집단의 경로계수 값에 대한 차이검증(등가제약 모형)결과에서 통계적으로 유의한 차이를 보이는 경로는 ‘경제성’→ ‘지각된 유용성’, ‘지각된 유용성’→ ‘추천의도’ 2개 경로인 것으로 나타났다. In this study, the effect of the funeral supplies selection characteristics (economy, diversity, format) and the funeral service selection characteristics (suitability, expertise, responsiveness) of funeral companies on perceived usefulness and intention to use/recommendation were examined for Chinese consumers. In addition, the moderating effect according to the perception(positive/ negative) of funeral companies and consumers’ characteristics (traditional values, face sensitivity, convenience) was examined and a multi-group analysis was conducted to examine the difference according to the experience(direct/indirect) of using funeral companies The analysis results are as follows. First, it was verified that ‘economy’ and ‘format (design/layout, etc.) had a positive (+) effect on perceived usefulness’ among the three factors of the selection characteristics (economy, diversity, and format) of funeral products. All three factors of service specificity (suitability, expertise, and responsiveness) of funeral companies were verified to have a positive (+) effect on perceived usefulness and perceived usefulness was verified to have a positive (+) effect on both use-intention and recommendationintention. Second, in the case of perception (positive/negative) of funeral companies, the moderating effect was verified between perceived usefulness and intention to use and recommendation. In the results of verifying the moderating effect according to consumer characteristics (traditional values, face sensitivity, convenience), all three factors were found to have a moderating effect between the selection characteristics of funeral supplies and perceived usefulness. and In the case of convenience, it was verified that the moderating effect was significant between suitability and perceived usefulness among service selection characteristics (suitability, expertise, responsiveness). On the other hand, in the moderating effect according to consumers’ characteristics (traditional values, face sensitivity, convenience) between perceived usefulness and use-intention/ recommendationintention, ‘traditional values’ was significant only in recommendation intention. Third, In the results of verifying the difference in the path coefficient values of the two groups(multi-group analysis) according to the experience(direct/indirect) of using a funeral companies, It was statistically significant in two paths such as ‘economical’ → ‘perceived usefulness’, ‘perceived usefulness’ → ‘recommended intention’.