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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/33025
標題: | 在出現嚴重頻率漂移下差別相位調變碼之遞迴式解碼 The Performance of Iterative Decoding for Coded DMPSK Signal in the Presence of Strong Frequency Drift |
作者: | Chen-Yi Chang 張正義 |
指導教授: | 林茂昭 |
關鍵字: | 非同調解碼,頻率漂移, Noncoherent Decoding,Frequency Drift, |
出版年 : | 2006 |
學位: | 碩士 |
摘要: | Noncoherent decoding is an attractive strategy when carrier phase acquisition and tracking is difficult
or impractical in communication systems. By using the powerful serial concatenated code scheme, Peleg and Marsland proposed efficient decoding methods that have good performance for noncoherent AWGN channel. In the thesis, we will consider the frequency drift induced by the mismatch of the tranceiver oscillators and modify the algorithm to achieve near coherent result based on the Peleg's method. We use a 1/2 code rate convolutional encoder and differential M-ary phase-shift keying(DMPSK) modulation to do computer simulations. The simulation results reveal the improvement of our proposed method. Further, we can also achieve near the same performance of the Peleg's method in the presence of combined frequency drift and random phase noise. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/33025 |
全文授權: | 有償授權 |
顯示於系所單位: | 電信工程學研究所 |
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