DVB-T傳收器在AWGN下系統效能模擬與分析

[[abstract]]在本論文中，我們以 Matlab 軟體架構出數位地面廣播系統(Digital Video Broadcasting Terrestrial,DVB-T)之實體層傳收器[1]，並在傳送過程中放入可加性白色高斯雜訊(Additive White Gaussian Noise,AWGN)，信號在經過調變、解調變、編碼與解碼的過程，最後我們將此信號與原本傳送的信號相比較並計算出位元錯誤率(Bit Error Rate, BER)。在本論文中模擬出在三種調變 QPSK、16-QAM、64-QAM 之下經由信號雜訊比(Signal to Noise Ratio,SNR)的改變來產生不同的結果。最後則個別針對有無里德所羅門碼(Reed Solomon code) [2]與迴旋編 碼 (convolutional code) 、維特比解碼(Viterbidecode) [3][4][5][6]之編解碼技術，再做一次系統效能模擬比較與分析。[[abstract]]In this paper, we use the Matlab software to implement the physical layer transceiver architecture of Digital Video Broadcasting Terrestrial (DVB-T) system, with additive white Gaussian noise (AWGN) is inserted during the signal transmission. The signal is transmitted through the processes of modulation, demodulation, encoding and decoding. The received signals are finally decoded and compared with the transmitted signals to calculate the system Bit Error rate (BER). Three different modulation formats, QPSK, 16-QAM, 64-QAM, are considered and their system performances are compared with different Signal to Noise (SNR) situations. We furthermore simulate and compare the system performances by implementing or without including certain coding and decoding techniques, such as Convolutional Code, Viterbi Decoder and Reed Solomon Code, in the DVB-T system.[[conferencetype]]國內[[conferencedate]]20061201~20061202[[booktype]]紙本[[iscallforpapers]]