| 一种利用循环前缀改善OFDM各级系统性能的方法 |
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| 引用本文： | KONG Fan-ting,尹志伟,万毅. 一种利用循环前缀改善OFDM各级系统性能的方法[J]. 通信技术, 2008, 41(8) |
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| 作者姓名： | KONG Fan-ting 尹志伟 万毅 |
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| 作者单位： | 兰州大学,信息科学与工程学院,甘肃,兰州,730000 |
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| 摘 要： | 近年来,正交频分复用(OFDM)技术已被越来越多的人所关注,并且在IEEE 802.11无线局域网中得到实际应用.在经典的OFDM系统中,接收端恢复信号时,只是对去掉循环前缀(CP)的信号进行处理,而没有考虑循环前缀中的部分有用信息.文章提出了一种基于LS(Least Squares)准则,利用循环前缀恢复发送信号的方法,并给出这种方法的仿真结果.结果表明,当循环前缀长度较大时,文章方法得到的误码率明显低于传统方法.
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| 关 键 词： | 正交频分复用 循环前缀 信道估计 误码率 |
A Method for Improving Performance of OFDM System by Using Cyclic Prefix |
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| KONG Fan-ting,YIN Zhi-wei,WAN Yi. A Method for Improving Performance of OFDM System by Using Cyclic Prefix[J]. Communications Technology, 2008, 41(8) |
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| Authors: | KONG Fan-ting YIN Zhi-wei WAN Yi |
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| Affiliation: | KONG Fan-ting,YIN Zhi-wei,WAN Yi(School of Information Science , Engineering,Lanzhou University,Lanzhou Gansu 730000,China) |
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| Abstract: | Recently orthogonal frequency division multiplexing(OFDM) has received more and more attention and applied to IEEE 802.11 wireless LAN.In a traditional OFDM system,the cyclic prefix is simply deleted during signal detection at the receiver,and the remaining portion of the received signal is used for processing,hence some useful information in the CP is not used.In this paper,an LS-based method is proposed,which uses the CP to help signal recovery and present its simulation result.As it turns out,for long CP... |
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| Keywords: | orthogonal frequency division multiplexing(OFDM) cyclic prefix(CP) channel estimation symbol error rate(SER) |
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