서지주요정보
범용 DSP 칩을 이용한 음성대역 고속 모뎀 알고리즘의 실시간 구현에 관한 연구 = Real time implementation of high-speed voice-band MODEM algorithm using general purpose DSP chip
서명 / 저자 범용 DSP 칩을 이용한 음성대역 고속 모뎀 알고리즘의 실시간 구현에 관한 연구 = Real time implementation of high-speed voice-band MODEM algorithm using general purpose DSP chip / 심우현.
저자명 심우현 ; Shim, Woo-Hyun
발행사항 [대전 : 한국과학기술원, 1996].
Online Access 제한공개(로그인 후 원문보기 가능)원문

소장정보

등록번호

8006257

소장위치/청구기호

학술문화관(문화관) 보존서고

MEE 96042

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

In this thesis, we implement a V.22 voice-band full digital MODEM using general purpose digital signal processor(DSP) chip, and suggest efficient algorithms for V.32 9600 bps QAM modem. The implementation is divided into three parts. The first one is a controller part which controls a flow between Data Terminal Equipment(DTE) and DSP chip. The second part is a data pump which receives and transmits digital signals with analog front end(AFE), and the third part is a Data Access Arrangement(DAA) which interfaces data pump with a real telephone line. Algorithms for V.32 High Speed MODEM are suggested and tested. The MODEM algorithm implemented includes functional blocks of scrambler/descrambler, differential encoder/decoder, signal point mapper, pre-equalizer, band-pass filter, phase-splitter, timing recovery, carrier recovery, decision, adaptive equalizer, echo-canceller and hand-shaking. For each functional blocks of V.32 modem, we choose passband symbol timing recovery, jointly T/2 spaced passband equalizer with carrier recovery and passband echo canceller with LMS algorithm for tap adaptation. Designed MODEM is tested and verified through successful communications with a commercial modem. Increasing data rates upto 9.6 kbps, 14.4kbps and adopting V.42/V.42bis for error correction/data compression would be left as a further work.

서지기타정보

서지기타정보
청구기호 {MEE 96042
형태사항 [iii], 70 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Woo-Hyun Shim
지도교수의 한글표기 : 이용훈
지도교수의 영문표기 : Yong-Hoon Lee
학위논문 학위논문(석사) - 한국과학기술원 : 전기 및 전자공학과,
서지주기 참고문헌 : p. 68-70
주제 모뎀
시각복구
반송파 복구
적응 등화기
반향 제거기
MODEM
DSP
QAM
BECM
Timing recovery
Carrier recovery
Adaptive equalizer
Echo canceller
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