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深海走航投弃式剖面仪传输信道特点的分析

发布时间:2019-01-12 08:14  文章来源:笔耕文化传播
【摘要】:走航投弃式剖面仪是海洋环境数据获取的重要仪器,主要应用于海洋环境观测中海洋参数的大面积快速测量,但传输信道特点一直并不明确,对信道传输性能的提高缺乏一定的理论基础。以XCTD信道为研究对象,优化了信道的模型和传递方程,计算得到信道阻抗参数值;采用时频法研究投弃式剖面仪信道基带传输信号的时变性,分析不同频率下的信号带宽的变化特性,分析随机噪声对传输信号和误码率的影响规律,结果表明,深海走航投弃式剖面仪传输信道在不同深度和传输速率下具有的"时变/窄带/低信噪比"规律特性,该信道特点与水声信道具有更多的相似性,该结论为提高XCTD信道传输性能拓宽了研究思路,为深海投弃式观测技术发展的信道传输技术共性问题提供了理论支持。
[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.
【作者单位】: 天津工业大学电子与信息工程学院;国家海洋技术中心;
【基金】:天津市应用基础与前沿技术研究计划(14JCYBJC16300)
【分类号】:P716


本文编号:2407551


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