http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Cheng-Chew (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
-
周?海(Chew Cheng-Hai) 중국문화연구학회 2006 중국문화연구 Vol.0 No.9
This article deals with the following topics: 1. Language changes am language norm and the standardization of Chinese when it goes globe-wide. 2. The balance between language development and language creativity. 3. Language teaching materials and language changes. 4. Challenges ahead when Chinese going globe-wide.
-
A Cholesky Factorization Based Approach for Blind FIR Channel Identification
Jinho Choi,Cheng-Chew Lim IEEE 2008 IEEE transactions on signal processing Vol.56 No.4
<P>For blind channel identification, various techniques, including transmitter-induced cyclostationarity based approaches, have been proposed in literature. To induce cyclostationarity at the transmitter, zero padding to every symbol packet can be considered. Some subspace methods are proposed for the channel estimation by exploiting the induced cyclostationarity. Due to zero padding, the covariance matrix of received signal vectors can have a special structure. Utilizing this structure, we can estimate channel impulse responses through factorization. In this correspondence, we propose a factorization based approach to estimate channel impulse responses. In general, the proposed factorization based approach can work with a small number of samples and becomes much more computationally efficient than the subspace method when the length of packets is long.</P>
-
An Analytical Approach for Design of Nth-band FIR Digital Filters with Equi-Ripple Passband
Moon, Dong-Wook,Kim, Lark-Kyo,Lim, Cheng-Chew The Korean Institute of Electrical Engineers 2009 Journal of Electrical Engineering & Technology Vol.4 No.3
In FIR (Finite Impulse Response) filter applications, Nth-band FIR digital filters are known to be important due to their reduced computational requirements. The conventional methods for designing FIR filters use iterative approaches such as the well-known Parks-McClellan algorithm. The Parks-McClellan algorithm is also used to design Nth-band FIR digital filters after Mintzer's research. However, a disadvantage of the Parks-McClellan algorithm is that it needs a large amount of design time. This paper describes a direct design method for Nth-band FIR Filters using Chebyshev polynomials, which provides a reduced design time over indirect methods such as the Parks-McClellan algorithm. The response of the resulting filter is equi-ripple in passband. Our proposed method produces a passband response that is equi-ripple to within a minuscule error, comparable to that of Mintzer's design method which uses the Parks-McClellan algorithm.
-
An Analytical Approach for Design of Nth-band FIR Digital Filters with Equi-Ripple Passband
Dong-Wook Moon,Lark-Kyo Kim,Cheng-Chew Lim 대한전기학회 2009 Journal of Electrical Engineering & Technology Vol.4 No.3
In FIR (Finite Impulse Response) filter applications, Nth-band FIR digital filters are known to be important due to their reduced computational requirements. The conventional methods for designing FIR filters use iterative approaches such as the well-known Parks-McClellan algorithm. The Parks-McClellan algorithm is also used to design Nth-band FIR digital filters after Mintzer’s research. However, a disadvantage of the Parks-McClellan algorithm is that it needs a large amount of design time. This paper describes a direct design method for Nth-band FIR Filters using Chebyshev polynomials, which provides a reduced design time over indirect methods such as the Parks-McClellan algorithm. The response of the resulting filter is equi-ripple in passband. Our proposed method produces a passband response that is equi-ripple to within a minuscule error, comparable to that of Mintzer’s design method which uses the Parks-McClellan algorithm.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
