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| 基于FFT相位差修正的伪码快捕方法 | |
| 引用本文： | 郭飞,朱文明,李志强,陆存乐. 基于FFT相位差修正的伪码快捕方法[J]. 无线电通信技术, 2006, 32(2): 15-17 |
| 作者姓名： | 郭飞 朱文明 李志强 陆存乐 |
| 作者单位： | 1. 解放军理工大学通信工程学院研究生1队,江苏,南京,210007 2. 解放军理工大学通信工程学院卫星通信系,江苏,南京,210007 |
| 摘 要： | 针对大频偏下高动态直扩接收机伪码捕获时间长的问题,提出了一种新的基于FFT相位精确估计频偏的改进方法。利用分段FFT频谱的相位差信息修正估计误差,以达到精确估计频偏的目的。理论分析和仿真结果表明,与传统的方法相比,该算法简单有效,具有较高的估计精度。 |
| 关 键 词： | 伪码快捕 频偏估计 FFT 部分相关 相位差修正 |
| 文章编号： | 1003-3114（2006）02-15-3 |
| 收稿时间： | 2005-08-22 |
| 修稿时间： | 2005-08-22 |
Fast code acquisition based on phase difference correction of FFT |
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| GUO Fei,ZHU Wen-ming,LI Zhi-qiang,LU Cun-le. Fast code acquisition based on phase difference correction of FFT[J]. Radio Communications Technology, 2006, 32(2): 15-17 | |
| Authors: | GUO Fei ZHU Wen-ming LI Zhi-qiang LU Cun-le |
| Affiliation: | 1. Postgraduate Team 1 ICE, PLAUST,Nanjing Jiangsu 210007, China; 2 . Department of Satellite Communication ICE, PLAUST, Nanjing Jiangsu 210007, China |
| Abstract: | A new code acquisition method based on phase difference correction of FFT is presented to solve the problem of long code acquisition time in high dynamic DSSS receivers having large frequency offset. The new algorithm is proposed to correct the error of FFT and then to estimates the frequency offset accurately by using the phase difference between two segmented spectrums. Both analysis and simulations demonstrate that the algorithm is simple, efficient and can achieve high precision compared with traditional FFT. |
| Keywords: | fast code acquisition frequency offset estimation FFT partial correlation phase difference correction |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |