【摘要】 为了提高深海投弃式剖面仪ASK频带传输的可靠性,提出了RS-CC级联码的解决方案。首先,从信道模型入手,分析了XCTD时变信道的特点;其次,根据信道环境存在复杂噪声的特点,分析了信号在传输过程中可能产生的错码类型,设计了(255,223)RS码+(8,255)交织器+(7,1/2)卷积码的算法结构;最后,针对XCTD的工作特点,分析了不同探测深度、传输频率和噪声量级条件下信号传输的误码率。仿真结果表明,RS-CC级联码的编码方案能够保证XCTD以高传输频率在大深度、大噪声环境中测量时较高的数据传输可靠性,对提高深海投弃式剖面仪传输性能提供了一种新的研究思路。更多还原

【Abstract】 In order to improve the accuracy of ASK band transmission of deep-sea abandoned profiler measuring instrument,this paper proposes the solution of Reed-Solomon Convolutional Concatenated Code.Firstly,starting with the XCTD channel model,we analyze the characteristic of time-varying channel;Secondly,according to the characteristic that the channel environment contains complex noise,we analyze the type of error code when data signal transmit in the channel,and design the algorithm structure of(255,223)Reed-Solomon(RS)code+(8,255)Interleaver+(7,1/2)Convolutional code;Finally,we analyze the error rate of signal transmission under the conditions of different investigation depth,transmission frequency and level of noise on the basis of XCTD work characteristics.The result of simulation indicates that the encoding scheme of Reed-Solomon Convolutional Concatenated Code is able to ensure the higher accuracy of data transmission when XCTD measures in the great-depth and strong-noise environment at high transmission frequency,and provides a new research idea for improving the transmission performance of deep-sea abandoned profiler measuring instrument.更多还原