https://scholars.lib.ntu.edu.tw/handle/123456789/151881
Title: | 多媒體與多重服務之數位用戶迴路通訊系統子計畫二–
高速數位用戶迴路DMT 基頻處理電路架構設計 Design of DMT Baseband Processing Architecture for High-Speed DSL |
Authors: | 闕志達 | Keywords: | 收發機;寬頻;正交多頻分工;數 位用戶迴路;離散多音調;Transceivers;Wideband data communication;OFDM, Digital Subscriber Loop;DMT | Issue Date: | 31-Jul-2002 | Publisher: | 臺北市:國立臺灣大學電機工程學系暨研究所 | Abstract: | 近年來,高速資料傳輸的需求增加,特別 是在網際網路相關的應用中,像是網路會 議、視訊點播、影像電話等。由於全面鋪 設光纖是相當昂貴的,為了在現有的電話 網路上達到寬頻的傳輸,DSL 的技術便因 應而生。 本計劃主要欲完成一個基於ETSI 所提出 的VDSL 系統標準的基頻收發機架構設計 及接收機晶片設計並驗證。在本設計中, 我們提出採用離散多音調(DMT)超高速數 位用戶迴路收發機架構。考量ETSI 所規範 的通道響應及各式干擾與雜訊,例如:高 斯雜訊(AWGN),近端交談雜訊(NEXT), 遠端交談雜訊(FEXT),無線電波干擾(RFI) 及突波雜訊(Impulse noise),在接收機架構 部分,設計並整合了符元邊界偵測,取樣 頻率誤差估測與補償,快速傅利葉轉換, 通道估測與等化及錯誤更正碼解碼器等演 算法。系統定點數模擬在所規範的通訊環 境下,所提出的收發機架構可以提供高速 低錯誤的數據傳輸(50Mbps,BER < 10-7)。 This project presents the architecture design, IC design and implementation of a VDSL transceiver for DMT-based VDSL systems. We propose an transceiver architecture for ETSI VDSL standard using discrete multi-tone modulation (DMT). According to Channel model and impairments defined in the standard, such as additive white Gaussian noise (AWGN), near end crosstalk (NEXT), far end crosstalk (FEXT), radio frequency interference (RFI) and impulse noise, algorithms for symbol boundary estimation, sampling clock offset estimation and compensation, fast Fourier transform(FFT), channel estimation and equalization, and forward error correcting code (FEC) decoder are designed and integrated into receiver architecture. Fixed point system simulation results show that the proposed receiver architecture is capable of very high-rate transmission in digital subscriber loop channels. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/7895 | Other Identifiers: | 902218E002039 | Rights: | 國立臺灣大學電機工程學系暨研究所 |
Appears in Collections: | 電機工程學系 |
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902218E002039.pdf | 322.91 kB | Adobe PDF | View/Open |
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