https://scholars.lib.ntu.edu.tw/handle/123456789/71964
標題: | 淡水河域水下通訊模擬與實驗研究 Underwater Acoustic Communication Study in Tamshui River |
作者: | 楊韋申 Yang, Wei-Shen |
關鍵字: | 多重路徑效應;二位元相位鍵移;決策回授等化器;符間干擾;高斯波束法;Multipath;Binary Phase Shift Keying;Decision Feedback Equalization;Inter Symbol Interference;Gaussian Beam Method | 公開日期: | 2009 | 摘要: | 就水下通訊而言,淺水環境面臨最大困難,是訊號受通道的多重路徑效應影響下,導致在振幅及相位失真。本論文是將水下通訊實驗進行量化分析,藉由分析結果把淡水河作為主要水下通訊的測試場。使用非線性決策迴授等化器主要目的為消除通道的符間干擾與補償原始訊號。本論文在淡水河作水下通訊實驗,利用線性與非線性等化器處理頻率8kHz資料傳輸速率每秒4K位元之二位元相位鍵移(BPSK)訊號,分析該訊號經過距離為50?190公尺之淺水環境通訊傳播成效,將實驗收到的訊號與高斯波束法模擬淺水環境相比下,了解整個淺水通道環境的影響情況。 On the underwater communication, the major obstacle is multipath effects with the shallow water channel. Acoustic signals that propagate through shallow water channel are effected by amplitude distorsion and phase fluctuation. This paper is to quantify the underwater communication experiment analysis,the results of the analysis by the Tamshui River as a major underwater communication test area. The main objective of using the nonlinear equalizer(Decision Feedback Equalization,DFE) to eliminate Inter Symbol Interference(ISI) and compensated to the original signal. This paper presents an experimental analysis of shallow water channel measurements for transmission distance from 50m to 190m in the Tamshui River. The linear and nonlinear equalizer are used for BPSK signal frequency 8kHz with a bit rates of 4kbits/s , compared to Gaussian Beam Method(GBM) simulation of shallow water environment to understand the environment of shallow water channel. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/188990 |
顯示於: | 工程科學及海洋工程學系 |
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ntu-98-R96525059-1.pdf | 23.53 kB | Adobe PDF | 檢視/開啟 |
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