| 一种高阶QAM信号载波频偏估计算法 |
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| 引用本文： | 吴迪松,张公礼,郑国.一种高阶QAM信号载波频偏估计算法[J].国际商务研究,2006,46(4):144-149. |
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| 作者姓名： | 吴迪松 张公礼 郑国 |
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| 作者单位： | 杭州电子科技大学通信工程学院,杭州310018 |
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| 摘 要： | 给出了一种高阶QAM信号载波频偏估计算法。该算法先采用非数据辅助频偏估计器估算出一个粗略的频偏，并进行补偿，然后对补偿信号用非数据辅助频偏估计器进行频偏估计，并把两者的频偏估计进行相加。最后为了提高估计精度，对估计出来的频偏进行Kalman滤波，并得出精确的频偏估计。该算法具有频偏估计范围大、估计准确度高的特点。计算机仿真表明频偏估计范围可达0．5符号率，估计精度接近克拉美-罗限。
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| 关 键 词： | 软件无线电 正交幅度调整 非数据辅助 载波频偏估计 克拉美-罗限 |
| 收稿时间： | 2005/6/29 0:00:00 |
| 修稿时间： | 2005/9/2 0:00:00 |
An Algorithm for Estimating Frequency Deviation of High Order QAM Carrier |
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| WU Di-song,ZHANG Gong-li,ZHENG Guo.An Algorithm for Estimating Frequency Deviation of High Order QAM Carrier[J].International Business Research,2006,46(4):144-149. |
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| Authors: | WU Di-song ZHANG Gong-li ZHENG Guo |
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| Institution: | Telecommunication Engineering College, Hangzhou University of Electronic Science and Technology, Hangzhou 310018, China |
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| Abstract: | An algorithm for high order QAM carrier frequency offset estimation is presented.This algorithm adopts non-data-aided frequency estimator to estimate a cursory frequency offset firstly,and then compensates and estimates it by the other frequency offset estimator,and then gets a precise frequency offset by adding them.In order to get a more precise frequency ,Kalman filter is kerforned for the estimated frequency offset.This algorithm has characteristics of large frequency acquisition range and high estimation precision.Computer smulations indicate that with this algorithm the estimation range can reach 0.5 symbol rate and estimation precision is near to Cramer-Rao bound(CRB). |
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| Keywords: | software radio QAM non-data-aided carrier frequency deviation estimation Cramer-Rao Bound(CRB) |
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