CAJ | 학술논문

为了实现钻井过程中井下信息的实时测量和上传，采用声波作为载波是一种很有发展前景的方法。对随钻数据声波传输系统中的调制技术和编码解码方法进行了Matlab仿真，结果表明：采用QPSK调制技术和1/3编码效率的卷积编码能提高数据通信的可靠性，降低系统的误码率。
위료실현찬정과정중정하신식적실시측량화상전，채용성파작위재파시일충흔유발전전경적방법。대수찬수거성파전수계통중적조제기술화편마해마방법진행료Matlab방진，결과표명：채용QPSK조제기술화1/3편마효솔적권적편마능제고수거통신적가고성，강저계통적오마솔。
The acoustic wave data transmission is a promising method to realize real-time measurement and uploading of the downhole information in the process of drilling. The modulation technology and coding/decoding method of the LWD data sound wave transmitting system were simulated in Matlab. The results show that the convolutional encoding with QPSK modula-tion technology and 1/3 coding efficiency can improve the reliability of the data communications and lower the bit error rate of the system.