| 基于正交频分复用(OFDM)技术的高速测井遥传系统 |
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| 引用本文： | 陈文轩,孙云涛,裴彬彬,朱新楷.基于正交频分复用(OFDM)技术的高速测井遥传系统[J].测井技术,2011,35(5):460-464,493. |
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| 作者姓名： | 陈文轩 孙云涛 裴彬彬 朱新楷 |
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| 作者单位： | 中国石油长城钻探工程公司测井技术研究院,北京,100176 |
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| 摘 要： | 采用传统的曼彻斯特等编码调制方式的遥传系统所获得的低传输率已成为制约测井仪器发展的瓶颈.正交频分复用技术(OFDM,Orthogonal Frequency Division Multipexing)利用子载波间的正交性很好地解决了频带利用率和码间干扰问题,具有较强的抗干扰能力和自适应能力,可以在带宽有限的测井电缆上实...
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| 关 键 词： | 测井电缆 正交频分复用 测井遥传 传输速率 数字通信 调制解调器 |
High Speed Telemetry System for Well Logging Based on OFDM |
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| CHEN Wenxuan,SUN Yuntao,PEI Binbin,ZHU Xinkai.High Speed Telemetry System for Well Logging Based on OFDM[J].Well Logging Technology,2011,35(5):460-464,493. |
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| Authors: | CHEN Wenxuan SUN Yuntao PEI Binbin ZHU Xinkai |
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| Affiliation: | (Well Logging Technology Center,Great Wall Drilling Company,Beijing 100176,China) |
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| Abstract: | By analyzing the frequency characteristics of the well logging wireline,a high speed well logging telemetry system is developed based on the Orthogonal Frequency Division Multiplexing (OFDM).This system with high environment noise immunity and adaptive data rate according to the noise environment is a full duplexer communication system and has achieved upstream data rate above 1 000 kbit/s and downstream data rate above 50 kbit/s over the 7 000 meters long well logging cable with the bit error rate less than 10E-7.As part of the LEAP800 well logging system,the telemetry system,with the features of short communication establishing time,high reliability and adapting to different lengths of wireline automatically,can work at 175 degree centigrade for two hours continuously and has been successfully used in the oilfield operation. |
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| Keywords: | logging cable OFDM(Othogonal Frequency Division Multipexing) logging telemetry transmission rate digital communication Modem |
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