DVB-T基頻接收機之FPGA設計與實現

Design and FPGA Implementation of Baseband Receiver for DVB-T System

徐銘言(Ming-yan Hsu)

指導教授 ： 陳逸民

國立中央大學/資訊電機學院/通訊工程學系/碩士(2012年)

摘要

DVB-T(Digital Video Broadcasting - Terrestrial)是歐洲廣播聯盟(European
Broadcast Union，EBU)所制定的數位電視廣播規格，也是目前我國所採用的數位電視廣播系統。
在本論文中，我們採用目前我國數位電視廣播之規格，設計並且實現DVB-T即時基頻接收機在FPGA實驗板上，此接收機之數位訊號處理模組中，包括了數位降頻器、訊號同步器、快速傅立葉轉換處理器、通道估測器、通道等化器、軟式決策器、訊號解交錯器及通道解碼器。系統架構以Matlab模擬分析後，在效能與硬體複雜度上選取適當之參數及規格後再以硬體實現。首先以Verilog硬體描述語言撰寫，經由ModelSim軟體邏輯驗證及模擬時序後，再以FPGA板做測試及驗證其功能與效能。

關鍵字

里徳所羅門碼 ； 快速傅立葉轉換器 ； 數位電視廣播

並列摘要

DVB-T, which is a Digital Video Broadcasting standard ratifies by European Broadcast Union and an abbreviation for Digital Video Broadcasting-Terrestrial, is the digital video broadcasting standard adopted in Taiwan. In this thesis, we discuss the design and implementation issues of a real-time baseband receiver for DVB-T system with FPGA. The digital signal processing units required for the baseband receiver include digital down converter, signal synchronizer, Fast Fourier Transform processor, channel estimator/equalizer, symbol deinterleaver, soft decision logics, bit deinterleaver, Viterbi decoder and Reed-Solomon decoder.
The algorithm and specification for each digital signal processing unit is first designed with a compromise between the performance and the hardware complexity. Then the hardware is programmed using Verilog hardware description language and logically verified with ModelSim. Finally, the real-time hardware is implemented and verified with FPGA.

並列關鍵字

Reed-Solomon code ； Fast Fourier Transform Processor ； DVB-T

參考文獻

[1] ETSI EN 300 744, Digital Video Broadcasting(DVB), Framing structure channel coding and modulation for digital terrestrial television. European Standard.

[2] R. Andraka, "A survey of CORDIC algorithms for FPGAs, " Proc. ACM/SIGDA Conf., pp.191 1998.

[3] P.C. Wang, “Design and Implementation of Variable-Length Fast Fourier Transform Processor in OFDM Systems, ” National Central University, Master’s thesis, Jul. 2007.

[6] W.Y. Huang, “Design and FPGA Implementation of An Improved Inter-Carrier Interference Mitigation Scheme for OFDM System in High-Mobility Environment, ” National Central University, Master’s thesis, 2010.

[9] F.S. Huang, “Design and Implementation of Synchronization System for DVB-T Receiver, ” National Central University, Master’s thesis, Jul. 2006.