| 一种适合软件无线电的载波相位和频差估计算法 |
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| 引用本文： | 储士平,张邦宁,郭道省,潘克刚. 一种适合软件无线电的载波相位和频差估计算法[J]. 北京理工大学学报, 2005, 25(5): 443-446 |
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| 作者姓名： | 储士平 张邦宁 郭道省 潘克刚 |
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| 作者单位： | 解放军理工大学,通信工程学院,江苏,南京,210007;解放军理工大学,通信工程学院,江苏,南京,210007;解放军理工大学,通信工程学院,江苏,南京,210007;解放军理工大学,通信工程学院,江苏,南京,210007 |
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| 摘 要： | 提出一种适合软件无线电的载波相位和频差估计算法.该算法利用并行方法估计有频差时的载波相位.在此基础上,基于MMSE准则计算载波相位的轨迹,得到频差和初始相位.该算法计算量小,可全数字实现,适用于线性和非线性调制,利用QPSK调制信号进行仿真.结果表明,用该算法可以精确估计载波相位和频差,有效地降低系统的误码率.
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| 关 键 词： | 载波同步 频差估计 软件无线电 最小均方误差 |
| 文章编号： | 1001-0645(2005)05-0443-04 |
| 收稿时间： | 2004-04-09 |
| 修稿时间： | 2004-04-09 |
An Algorithm for Carrier Phase and Frequency Offset Estimation in Software Radio |
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| CHU Shi-ping,ZHANG Bang-ning,GUO Dao-sheng and PAN Ke-gang. An Algorithm for Carrier Phase and Frequency Offset Estimation in Software Radio[J]. Journal of Beijing Institute of Technology(Natural Science Edition), 2005, 25(5): 443-446 |
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| Authors: | CHU Shi-ping ZHANG Bang-ning GUO Dao-sheng PAN Ke-gang |
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| Affiliation: | Institute of Communication Engineering, PLAUST, Nanjing, Jiangsu 210007, China;Institute of Communication Engineering, PLAUST, Nanjing, Jiangsu 210007, China;Institute of Communication Engineering, PLAUST, Nanjing, Jiangsu 210007, China;Institute of Communication Engineering, PLAUST, Nanjing, Jiangsu 210007, China |
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| Abstract: | An algorithm suitable for carrier phase and frequency offset estimation in software radio is proposed. Firstly the carrier phase with frequency offset is obtained with a parallel method. Then the phase trajectory is estimated based on MMSE criterion, and the frequency offset and initial phase can be achieved. The algorithm suits for linear and nonlinear modulation, which is simple and can be realized all-digitally. The simulation for QPSK shows that the algorithm can estimate the carrier phase and frequency offset accurately and reduce the system BER effectively. |
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| Keywords: | carrier synchronization frequency offset estimation software radio minimum mean square error |
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