| 基于OFDM/DMT的短长度循环前缀分析 |
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| 引用本文： | 包永平,任亚萍.基于OFDM/DMT的短长度循环前缀分析[J].兵工自动化,2006,25(3):46-47. |
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| 作者姓名： | 包永平 任亚萍 |
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| 作者单位： | 装备指挥技术学院,研究生院,北京,101416;西安中航流量技术研究所,陕西,西安,710065 |
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| 摘 要： | 基于正交频分复用系统/离散多音调制系统(OFDM/DMT)的短长度循环前缀,设定相关信号并引入参数完成系统模型和干扰消除.通过分析短长度循环前缀对系统性能的影响,导出载波和符号间干扰能量谱密度计算公式,且得知二者的能量谱密度值相等.该分析以非对称数字环路传输系统为例,其噪声在DC附近集中.
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| 关 键 词： | 循环前缀 短长度 OFDM DMT 载波间干扰 符号间干扰 |
| 文章编号： | 1006-1576（2006）03-0046-02 |
| 收稿时间： | 2005-08-31 |
| 修稿时间： | 2005-10-09 |
Analysis of Short Length Cyclic Prefix Based on OFMD/DMT |
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| BAO Yong-ping,REN Ya-ping.Analysis of Short Length Cyclic Prefix Based on OFMD/DMT[J].Ordnance Industry Automation,2006,25(3):46-47. |
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| Authors: | BAO Yong-ping REN Ya-ping |
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| Abstract: | For the short length cyclic prefix based on orthogonal frequency division multiplex/distributed Multitone modulation (OFDM/DMT) system, the relative signals were set up and parameters were introduced by short length cyclic prefix to establish the system model and eliminate the disturbance. The energy spectrum density calculation formulas of Inter-Carrier Interface (ICI) and Inter-Symbol Interference (ISI) were deduced through analyzing influence of short length cyclic prefix on system performance, and learned that energy spectrum density value of ICI was equal to energy spectrum density value of ISI. The asymmetry digital circuit transmission system was taken as example. The noise was gathered around DC. |
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| Keywords: | Cyclic prefix Short length OFDM (Orthogonal Frequency Division Multiplexing) DMT (Discrete Multi-Tone) ICI (Inter-Carrier Interface) ISI (Inter-Symbol Interface) |
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