| 高速电缆遥传系统中的调制解调器设计 |
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| 引用本文： | 党剑华.高速电缆遥传系统中的调制解调器设计[J].测井技术,2005,29(1):66-68. |
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| 作者姓名： | 党剑华 |
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| 作者单位： | 西安邮电学院电子与信息工程系,陕西,西安,710061 |
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| 摘 要： | 根据奈斯特定律,测井电缆所能传输的基带信号的极限速率为200 kBit/s,这给提高信息传输速率带来很大困难.因此,需要采用高效的调制解调技术.介绍了高速电缆遥传系统中的调制解调器设计方案及实现.通过对OFDM(正交频分复用)技术原理及测井电缆传输特性的分析,设计出满足测井电缆所需的调制解调器.在测井仪器中首次使用OFDM技术,满足了测井仪器的设计要求.
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| 关 键 词： | 调制解调器 正交频分复用 高速电缆遥传系统 |
| 文章编号： | 1004-1338(2005)01-0066-03 |
| 修稿时间： | 2004年12月13日 |
The Design of Modem in High Speed Cable Telemetry System |
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| DANG Jian-hua.The Design of Modem in High Speed Cable Telemetry System[J].Well Logging Technology,2005,29(1):66-68. |
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| Authors: | DANG Jian-hua |
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| Abstract: | The limit velocity of baseband signal that logging cable can transmit is 200 kBit/s, so, it is very difficult to increase velocity of data transmission, then, high efficient modulation and demodulation technology should be adopted. Introduced are the design scheme and realization of Modem in high speed cable telemetry system. Based on analyzing the theory of OFDM(Orthogonal Frequency Division Multiplexing)and characteristic of cable transmission, the Modem of high speed cable telemetry system has been designed. It is the first time that the OFDM is used in logging tools,which meets the requirement of design of logging tools. |
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| Keywords: | Modem OFDM high speed cable telemetry system |
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