서지주요정보
Frequency estimation in frequency-selective channels and its application to transmissions with antenna diversity = 주파수 선택적 페이딩 채널에서의 주파수 추정과 송신 다이버시티 시스템에의 응용
서명 / 저자 Frequency estimation in frequency-selective channels and its application to transmissions with antenna diversity = 주파수 선택적 페이딩 채널에서의 주파수 추정과 송신 다이버시티 시스템에의 응용 / Eui-Rim Jeong.
저자명 Jeong, Eui-Rim ; 정의림
발행사항 [대전 : 한국과학기술원, 2001].
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8012599

소장위치/청구기호

학술문화관(문화관) 보존서고

DEE 01069

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초록정보

New data-aided frequency estimators are introduced for phase shift keying (PSK) or quadrature amplitude modulation (QAM) transmitted over frequency-selective fading channels. The estimators are developed based on a maximul likelihood (ML) or a least squares (LS) criterion. The ML-based estimator assumes the use of a special class of pilots, called near-iid (independent identically distributed) sequences, with impulsive 4-th order moments. By the help of such pilots, the ML based estimator can estimate frequency offsets without the need for channel information. The pilots of GSM and IS-136 mobile communication systems have been observed as are near-iid, and statistical analysis indicates that the ML based estimate is almost unbiased if the pilot is near-iid. The LS-based estimator is developed from differentially decoded signals. Using these signals, the channel autocorrelations containing a frequency offset are first estimated by LS criterion. Among the elements of the estimated autocorrelations, useful terms for frequency estimation are collected, and from which the frequency offset is estimated. The LS based estimator is robust to the preamble pattern, and it also does not require any channel information. The proposed estimators are applied to transmissions with antenna diversity. In addition, a space-time (ST) block coding for frequency estimation is investigated, and we propose a condition that the code matrix should satisfy, called cyclically orthogonal matrix. If the code matrix is cyclically orthogonal, the frequency offset can be easily estimated from the inner product between different received signal vectors without any channel information.

서지기타정보

서지기타정보
청구기호 {DEE 01069
형태사항 vii, 89 p. : 삽도 ; 26 cm
언어 영어
일반주기 저자명의 한글표기 : 정의림
지도교수의 영문표기 : Yong-Hoon Lee
지도교수의 한글표기 : 이용훈
수록잡지명 : "Data-aided frequency estimation for PSK signaling in frequency-selective fading". IEEE journal on selected areas in communications, v.19 no. 7, (July 2001)
학위논문 학위논문(박사) - 한국과학기술원 : 전기및전자공학전공,
서지주기 Reference : p. 88-89
주제 Frequency estimation
Frequency-selective fading channel
Transmit diversity
주파수 추정
주파수 선택적 페이딩 채널
송신 다이버시티
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