通道估測技術應用於歐規數位地面電視廣播接收機之實現與效能評估

Implementation and Evaluation of Applying Channel Estimation Scheme in DVB-T Receiver

蔡俊偉(Chun-Wei Tsai)

指導教授 ： 林信標

國立臺北科技大學/電資學院/電子電腦與通訊產業研發碩士專班/碩士(2007年)

https://doi.org/10.6841/NTUT.2007.00229

摘要

本論文是以正交分頻多工（Orthogonal Frequency Division Multiplexing, OFDM）裡的通道估測（Channel Estimation）為主體，藉由論文中的時域下自相關估測法（Frequency Domain Pilot Time Domain Correlation Method, FPTC）來取代舊系統的傳統通道估測法而達到更好的接收效率。
在論文的第二章會提到OFDM的特性及優點與介紹數位地面電視廣播（Digital Video Broadcast-Terrestrial, DVB-T ）的傳輸標準，第三章的部分則是比較傳統通道估測法與時域下自相關估測法的模擬結果，第四章是實際接收DVB-T的訊號接著由不同通道估測法所解映射的星座圖來比較。
將傳統數位電視接收機的同步與通道估測演算法換成部分相似估測法（PLD）與時域下自相關估測法（FPTC）後，在固定接收的情況下效能增加了36.7%，時速40km/h接收的情況下效能增加了29.3%。

關鍵字

歐規數位電視 ； 正交分頻多工 ； 通道估測和時域下自相關演算法

並列摘要

This paper’s principal is based on channel estimation scheme of OFDM systems by way of using FPTC to replace conventional system’s channel estimation for obtaining better BER performance of DVB-T receivers.
In this paper, the second section mention, the characteristics and advantages of OFDM modulation and transmission parameters of DVB-T system. The third section compares the simulation result of one-tap equalizer and FPTC. The fourth section presents the performance of using FPTC channel estimation scheme in real DVB-T receiving signals.
Finally, after using PLD and FPTC to replace the conventional synchronization and channel estimation scheme of DVB-T receiver. The reception performance increases 30.7% and 29.3%, respectively, in fixed and 40km/hr cases.

並列關鍵字

DVB-T ； OFDM ； Channel Estimation ,and FPTC

參考文獻

[23] 李卓澔，數位電視通道解碼及解調變之實作，碩士論文，國立台北科技大學資訊工程系所，台北，2006。

coding and modulation for digital terrestrial television,” vo1.5.1, Nov 2004.

[3] J.A.C. Bingham, “Multicarrier modulation for data transmission :an idea whosetime has come,” IEEE Communication Magazine, vol. 28, no. 5, pp. 5-14, May 1990.

[4] ETSI EN 300 401, Radio broadcast systems: Digital audio broadcasting to mobileportable and fixed receivers, vo1.3.3,2001.

[5] T. Shono, Y. Shirato, H. Shiba, K. Uehara, K. Araki, and M. Umehira, , “IEEE 802.11 wireless LAN implemented on softwaredefined radio with hybrid programmable architecture,” IEEE Transactions on Wireless Communication, vol. 4, no. 5, September 2005.