| 基于PMF-FFT改进的捕获方法 |
| |
| 引用本文： | 徐宁波,宋荣荣.基于PMF-FFT改进的捕获方法[J].无线电通信技术,2014(2):41-43,55. |
| |
| 作者姓名： | 徐宁波 宋荣荣 |
| |
| 作者单位： | [1]远东华强导航定位有限公司,河北石家庄050081 [2]河北省计量监督检测院,河北石家庄050051 |
| |
| 摘 要： | 在北斗或GPS定位系统中,噪声环境下的快速捕获是信号处理的重要环节。提出了一种基于PMF-FFT改进算法的信号同步捕获方法,可以在硬件资源有限的情况下提高多普勒频偏估计精度,并在不增加FFT点数的条件下减少相关增益存在的损失,该改进算法综合考虑了捕获时间和硬件资源的消耗占比,优化了算法结构。对仿真结果做了分析,结果表明能够有效增加捕获概率,减少捕获时间。
|
| 关 键 词： | 捕获 部分匹配滤波器 快速傅里叶变换 多普勒频偏 |
Based on PMF-FFT Improved Synchronization Acquisition Method |
| |
| XU Ning-bo,SONG Rong-rong.Based on PMF-FFT Improved Synchronization Acquisition Method[J].Radio Communications Technology,2014(2):41-43,55. |
| |
| Authors: | XU Ning-bo SONG Rong-rong |
| |
| Institution: | 1.Fareast Huaqiang Navigation ＆ Position Limited Company, Shijiazhuang Hebei 050081, China; 2, Hebei Institute of Product Quality Metrology Technology Supervision,Shijiazhuang Hebei 050051,China) |
| |
| Abstract: | In Compass or GPS positioning system, fast signal acquisition in noisy environments is an important part of signal processing. This paper presents a synchronized signal acquisition algorithm based on improved PMF-FFT methods. It can improve the Doppler offset estimation accuracy with limited hardware resources, and reduced associated gain loss without increasing the number of FFT points. The improved algorithm takes into account the proportion of consumption to acquisition time and hardware resources and optimizes the algorithm structure. Finally, the simulation results are analyzed. The results show that this algorithm can effectively increase the probability of acquisition, reduce the acquisition time. |
| |
| Keywords: | acquisition PMF FFT Doppler-shift |
| 本文献已被 CNKI 维普 等数据库收录！ |
|
