| 多径衰落信道下导频辅助的OFDM定时估计算法 |
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| 引用本文： | 秦志毅.多径衰落信道下导频辅助的OFDM定时估计算法[J].电子科技,2007(3):51-52,57. |
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| 作者姓名： | 秦志毅 |
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| 作者单位： | 中国电子科技集团第二十研究所,第八研究室,陕西,西安,710068 |
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| 摘 要： | 利用最大似然代价函数推导出了一种导频辅助的OFDM定时估计算法。在信道阶数未知情况下,对其导频采用循环前缀(CP)方式和补零(ZP)方式的性能做了比较分析。用ZP方式导频时,该算法克服了信道阶数未知时定时测度平台。仿真分析验证了本算法性能的优越性。
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| 关 键 词： | OFDM 导频 定时估计 多径衰落 补零 |
| 收稿时间： | 2006-06-09 |
| 修稿时间： | 2006-06-09 |
Pilot-aided Timing Estimation for OFDM Communication Systems in Multipth Fading Channels |
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| Qin Zhiyi.Pilot-aided Timing Estimation for OFDM Communication Systems in Multipth Fading Channels[J].Electronic Science and Technology,2007(3):51-52,57. |
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| Authors: | Qin Zhiyi |
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| Abstract: | A pilot-aided timing algorithm for OFDM systems has been derived by exploiting the maxi- mum likelihood cost function.The performances for both cycle prefix (CP) and zeros-padding (ZP) mode pilots are compared and analyzed in the case of unknown channel order (UCO).It is found that the ZP mode pilot can overcome the metric plateau.Simulations show the effectiveness of the algorithm. |
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| Keywords: | OFDM pilot timing estimation multipath fading zeros-padding |
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