地震数据采集记录系统中RS编译码的原理及实现

发布时间：2018-05-30 21:12

本文选题：RS码 + 地震数据采集记录系统　；参考：《南京邮电大学》2015年硕士论文

【摘要】：地震数据采集记录系统是用于石油勘探和地震勘探领域中重要的设备。地震数据在传输过程中要经过冗长的数据线,其间会受到各种噪声的干扰,从而造成数据发生错误。因此研究信道的抗干扰技术,以提高系统的容错能力对地震数据采集记录系统的正常且可靠地工作具有重大的意义。纠错编码技术可以纠正数据在传输过程中因干扰造成的错误。里德-所罗门码(RS码)可以纠正随机错误和突发错误,是一种性能优异的前向纠错编码。RS编码的复杂度决定了其具有较大的功耗,这一点使其很难应用于采用蓄电池供电的地震仪。针对以上问题,本文在研究RS码编译码原理后,通过对RS编码参数的改变,提出一种适用于数字地震仪中的低功耗RS编码方法。该方法相比于传统的已提出的实现方法在计算复杂度,延迟及功耗等性能方面的优势均有明显提升。在译码方面,本文提出将ARiBM译码算法应用到本设计中。仿真结果证明,本设计实现的的RS(31,27)码,可以在满足数字地震仪对低功耗的要求下,达到数字地震仪对传输可靠性的要求。本文完成的主要工作有:1.分析影响地震数据采集记录系统中数据传输的因素,深入研究地震数据采集记录系统的信道模型。将RS码与其他码型进行分析对比,综合各种码型的特点和工程需要,将RS码应用到地震数据采集记录系统中,作为信道编码,拟定设计方案。2.提出了一种适合应用于地震数据采集记录系统中的RS编码方法。该方法有效降低了RS码编码的功耗,更加适用于对功耗要求较高的地震数据传输系统,并在以上基础上提出了一种适合应用于地震数据采集记录系统中的RS码型。3.基于FPGA平台利用Verilog语言设计实现RS(31,27)编译码器。由本文的实验结果可知,本设计完全达到了地震数据采集记录系统在信息传输时对速率、可靠性及实时性的要求。
[Abstract]:Seismic data acquisition and recording system is an important equipment in the field of petroleum exploration and seismic exploration. Seismic data is transmitted through long data lines, which will be disturbed by various noises, resulting in data errors. Therefore, it is of great significance to study the anti-jamming technology of the channel to improve the fault-tolerant ability of the system for the normal and reliable work of the seismic data acquisition and recording system. Error correction coding technique can correct the errors caused by interference during data transmission. Reed-Solomon code (RS) can correct random errors and burst errors. It is a kind of forward error correction code with excellent performance. The complexity of RS code determines its high power consumption. This makes it difficult to apply to accumulator-powered seismographs. Aiming at the above problems, after studying the principle of RS coding and decoding, a low power RS coding method suitable for digital seismograph is proposed by changing the RS coding parameters. Compared with the traditional implementation method, the proposed method has significant advantages in terms of computational complexity, delay and power consumption. In the aspect of decoding, this paper proposes to apply ARiBM decoding algorithm to this design. The simulation results show that the RSH31P27) code designed in this paper can meet the requirement of transmission reliability of digital seismograph under the requirement of low power consumption. The main work accomplished in this paper is 1: 1. The factors affecting data transmission in seismic data acquisition and recording system are analyzed, and the channel model of seismic data acquisition and recording system is deeply studied. The RS code is analyzed and compared with other code types, and the characteristics and engineering requirements of various codes are synthesised. The RS code is applied to the seismic data acquisition and recording system as the channel coding, and the design scheme is drawn up. A RS coding method suitable for seismic data acquisition and recording system is proposed. This method can effectively reduce the power consumption of RS code coding, and is more suitable for seismic data transmission systems with high power consumption. On the basis of the above, a RS code type. 3, which is suitable for seismic data acquisition and recording system is proposed. Based on FPGA platform, Verilog language is used to design and implement RSN 31 / 27) encoder and decoder. From the experimental results of this paper, we can see that this design completely meets the requirements of the speed, reliability and real-time of the seismic data acquisition and recording system in the transmission of information.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P631.4;TP274.2

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