井下声波通信系统中的同步解调方法  

Synchronization and Demodulation Scheme in Downhole Acoustic Communication System

作　　者：余浩[1] 余厚全[1] 

机构地区：[1]长江大学电子信息学院,湖北荆州434023

出　　处：《河南科技》2017年第9期26-29,共4页Henan Science and Technology

摘　　要：为满足油田智能化开采应用中数据长期监测的需求,对井下数据的声波耦合提取进行研究;分析声波传输过程中可能出现的信号畸变问题,针对信号幅度的不规则起伏采取三值包络分层解调方法,设计基于采样点分组与相关检测的位同步提取算法,开发相应的同步解调软件。结果表明,该算法复杂度低,易于实现,适用于传输速率不高于2kbit/s的数传系统。To meet the demand of long-time data monitoring in intelligent exploitation of oil field, the downholeacoustic communication was studied. The research was mainly about the signal distortion during acoustic transmis-sion. For the irregular fluctuation of signal amplitude, the solution included three-envelope-layering and bit synchro-nization extraction algorithm based on sample points grouping and correlation detection. Lastly, the corresponding de-modulation software was developed. The result of experiment showed that the algorithm had advantage of low com-plexity, easy implementation and was suitable for data transmission system whose rate was not higher than 2 kbit/s.

关 键 词：声波通信 包络分层 位同步 

分 类 号：TN929.3[电子电信—通信与信息系统]