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基于OFDM的高速遥传电缆调制解调器设计
引用本文:秦伟,王炜,陈鹏.基于OFDM的高速遥传电缆调制解调器设计[J].测井技术,2006,30(5):467-469.
作者姓名:秦伟  王炜  陈鹏
作者单位:中国石油集团测井有限公司技术中心,陕西 西安 710021
摘    要:为满足成像测井仪器采集数据量大的要求,对高速电缆遥传系统中的关键环节--电缆调制解调器进行了研制.电缆调制解调器采用OFDM等编码调制技术,解决了高数据传输率和有限的电缆带宽的矛盾.介绍了正交频分复用(OFDM)技术的原理.根据该原理,设计出了高速遥传电缆调制解调器结构图和硬件框图,并作了详细阐述.给出了OFDM调制/解调流程图及其说明.所设计的电缆调制解调器经过室内测试和野外测井试验,试验表明电缆调制解调器的设计是合理可行的.

关 键 词:测井仪器  高速遥传  正交频分复用  电缆调制/解调器  数字信号处理器  傅里叶变换  OFDM  电缆遥传系统  电缆调制解调器  设计  Modulator  Telemetry  Cable  Design  测井试验  室内测试  流程图  阐述  框图  硬件  结构图  原理  正交频分复用  带宽  有限  传输率
文章编号:1004-1338(2006)05-0467-03
收稿时间:2006-07-05
修稿时间:2006年7月5日

Design of High-speed Cable Telemetry Modulator/Demodulator Based on OFDM
QIN Wei,WANG Wei,CHEN Peng.Design of High-speed Cable Telemetry Modulator/Demodulator Based on OFDM[J].Well Logging Technology,2006,30(5):467-469.
Authors:QIN Wei  WANG Wei  CHEN Peng
Abstract:In order to meet the demand of high data volume for imaging tools,a cable Modulator/Demodulator is investigated and developed since it is the key to any high-speed cable transmission system.The Modulator/Demodulator adopts OFDM(Orthogonal Frequency Division Multiplexing) technology to solve the antinomy between the high-speed data transmission and the limited cable bandwidth.The principle of OFDM is introduced first.Based on the OFDM principle,architecture block diagram and hardware block diagram of the cable Modulator/Demodulator are designed and are described in detail.OFDM Modulation/Demodulation flowchart is also presented and elaborated.Field test results demonstrate that the cable Modulator/Demodulator design is practical and feasible.
Keywords:well logging tool  high-speed telemetry  Orthogonal Frequency Division Multiplexing  cable Modulator/Demodulator  DSP  FFT
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