摘要
常规的单载波调制技术在带宽有限的测井电缆上的低传输速率制约着成像测井技术的发展。在分析测井电缆传输特性和OFDM技术原理的基础上,设计了一种基于OFDM技术的测井电缆高速数据传输系统,并介绍了基于OFDM技术的测井电缆高速数据传输系统的参数设计和工作原理,给出了不同长度测井电缆上的测试结果。电缆实测结果表明,在7000 m长的测井电缆上,基于OFDM技术的测井电缆高速数据传输系统可获得900 kbit/s以上的数据传输速率和低于5E-8的误码率。当变压器的接入模式为Mode-Ⅱ时,系统最高的数据传输速率可达到1.1 Mbit/s。
To solve the low data transmission rate problem in the conventional single carrier modulation method for logging cable and enhance the data transmission rate, a new data transmission system with high data transmission rate for logging cable is proposed, which is based on the Orthogonal Frequency Division Multiplexing （OFDM） technology. The working principle of OFDM modem and the procedure of data transmission system are also presented and lots of tests are carried out on logging cables with different lengths. It is verified that the data transmission rate can reach 900 kbit/s on 7 000 meters logging cable with bit error rate （BER） lower than 5E-8, and the maximum data transmission rate is 1.1 Mbit/s under Mode-Ⅱ of the transformer.
出处
《测井技术》
CAS
CSCD
北大核心
2009年第1期84-88,共5页
Well Logging Technology
