地面數位電視廣播基頻接收器之載波同步設計; Design of Carrier Recovery for DVB-T Baseband Receiver

NCUIR > College of Electrical Engineering & Computer Science > Graduate Institute of Electrical Engineering > Electronic Thesis & Dissertation > Item 987654321/9872

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/9872

Title:	地面數位電視廣播基頻接收器之載波同步設計;Design of Carrier Recovery for DVB-T Baseband Receiver
Authors:	魏庭楨;Ting-Zhen Wei
Contributors:	電機工程研究所
Keywords:	同步;等化器;數位電視;equalizer;synchronization;dvb-t
Date:	2005-07-08
Issue Date:	2009-09-22 11:58:27 (UTC+8)
Publisher:	國立中央大學圖書館
Abstract:	地面數位電視廣播（DVB-T），為台灣地區所使用的數位電視廣播規格。其所採用的通訊技術為正交分頻多工（OFDM），正交分頻多工是一種多載波的調變方式，將資料分散到各個不同的頻率且互相正交的次載波。在本論文裡，針對地面數位電視廣播系統，專注於同步與通道等化器的演算法，並使用Matlab與C語言建立系統模擬平台。此平台包含數位降頻器，載波同步，時序同步與頻域等化器。最後，提出縮減記憶體之整數倍頻率誤差估計之架構，此架構可以減少記憶體使用量達90%，減少存取次數達94%和減少估計時間達37%。 Digital Video Broadcasting for Terrestrial (DVB-T) is the digital TV broadcasting standard in Taiwan. The adopted communication technical is Orthogonal Frequency Division Multiplexing (OFDM). OFDM is a kind of multi-carrier modulation and divides the data into several differential and orthogonal sub-carriers. In this thesis, we focus on synchronization and channel estimation of DVB-T and build a simulation platform using Matlab and C language. This platform contains digital down conversion, carrier frequency synchronization, timing synchronization and frequency domain channel estimation. Finally, we propose a memory reduction architecture for integer carrier frequency offset estimation. This architecture reduces the usage of memory by 90 %, the memory access number is reduced by 94% and the estimation time is reduced by 37%.
Appears in Collections:	[Graduate Institute of Electrical Engineering] Electronic Thesis & Dissertation

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