【摘要】：走航投棄式剖面儀是海洋環(huán)境數(shù)據(jù)獲取的重要儀器,主要應(yīng)用于海洋環(huán)境觀測中海洋參數(shù)的大面積快速測量,但傳輸信道特點一直并不明確,對信道傳輸性能的提高缺乏一定的理論基礎(chǔ)。以XCTD信道為研究對象,優(yōu)化了信道的模型和傳遞方程,計算得到信道阻抗參數(shù)值;采用時頻法研究投棄式剖面儀信道基帶傳輸信號的時變性,分析不同頻率下的信號帶寬的變化特性,分析隨機噪聲對傳輸信號和誤碼率的影響規(guī)律,結(jié)果表明,深海走航投棄式剖面儀傳輸信道在不同深度和傳輸速率下具有的"時變/窄帶/低信噪比"規(guī)律特性,該信道特點與水聲信道具有更多的相似性,該結(jié)論為提高XCTD信道傳輸性能拓寬了研究思路,為深海投棄式觀測技術(shù)發(fā)展的信道傳輸技術(shù)共性問題提供了理論支持。
[Abstract]:The jettisoning profiler is an important instrument for the acquisition of marine environmental data. It is mainly used in large area rapid measurement of ocean parameters in marine environmental observation, but the characteristics of transmission channel are not clear all the time. There is no theoretical basis for improving the performance of channel transmission. Taking the XCTD channel as the research object, the channel model and transfer equation are optimized, and the channel impedance parameters are calculated. The time-frequency method is used to study the time-variation of the baseband transmission signal in the channel of the disposable profiler. The variation characteristics of the signal bandwidth at different frequencies are analyzed, and the influence of random noise on the transmission signal and the bit error rate is analyzed. The results show that, The "time-varying / narrowband / low signal-to-noise ratio" characteristics of the deep-sea jettisoned profiler transmission channel at different depths and transmission rates are more similar to those of the underwater acoustic channel. This conclusion broadens the research ideas for improving the transmission performance of XCTD channel and provides theoretical support for the commonness of channel transmission technology in the development of deep-sea jettisoned observation technology.
【作者單位】： 天津工業(yè)大學(xué)電子與信息工程學(xué)院;國家海洋技術(shù)中心;
【基金】：天津市應(yīng)用基礎(chǔ)與前沿技術(shù)研究計劃(14JCYBJC16300)
【分類號】：P716
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本文編號：2407551