基于QDPSK的电磁波随钻测量信号调制方法  

Modulation method of electromagnetic wave measurement with drilling based on QDPSK

作　　者：闫严[1] 尹静文[2] Yan Yan;Yin Jing-wen

机构地区：[1]中国电子科技集团公司第二十二研究所 [2]新乡职业技术学院

出　　处：《国外测井技术》2019年第2期75-79,M0002,共6页World Well Logging Technology

摘　　要：基于提高电磁波随钻测量系统中电磁波传输的传输速率和抗干扰能力的目的,在深入分析PPM、2PSK和QDPSK几种调制方法的基础上,提出了一种QDPSK数字调制的软件实现方法,采用自上而下的设计方法,通过串/并转换、码变换、逻辑选相、四相载波生成完成,通过MATLAB对各部分进行建模和仿真和电磁波随钻测量系统在钻井现场的试验,结果表明该方法设计简单,性能稳定,便于实现,现场试验数据传输速率达到60bps。In order to improve the transmission rate and anti-interference ability of electromagnetic wave transmission in MWD system, a software implementation method of QDPSK digital modulation is proposed based on in-depth analysis of PPM, 2PSK and QDPSK modulation methods. It is completed by series/parallel conversion, code conversion, logical phase selection and four-phase carrier generation using top-down design method and MATLAB. Modeling and Simulation of each part and testing of electromagnetic wave while drilling measurement system in drilling field show that the method is simple in design, stable in performance and easy to implement, and the data transmission rate of field test reaches 60bps.

关 键 词：随钻测量系统 电磁波传输 QDPSK调制 MATLAB仿真 

分 类 号：TE927[石油与天然气工程—石油机械设备]