| 大动态直扩信号的快速捕获方法 |
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| 引用本文： | 王永庆,高磊,吴嗣亮. 大动态直扩信号的快速捕获方法[J]. 北京理工大学学报, 2010, 30(1): 92-95 |
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| 作者姓名： | 王永庆 高磊 吴嗣亮 |
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| 作者单位： | 北京理工大学,雷达技术研究所,北京,100081;上海航天电子技术研究所,上海,201109 |
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| 基金项目： | 国家“八六三”计划项目(1010021310XXX) |
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| 摘 要： | 针对大动态环境下直接序列扩频信号的快速捕获问题,提出了一种两轮频域搜索的捕获方法.该方法采用快速傅里叶变换实现伪码的并行相关,通过两轮频域搜索完成捕获.第1轮搜索整个多普勒频率范围,得到各个频点的峰均比,选大后进行门限判决;第2轮搜索进行多普勒频率的小范围验证.分析和仿真结果均表明,对于直接序列扩频信号的快速捕获,提出的方法具有更高的捕获精度、更好的捕获性能,尤其适用于大多普勒频率及其变化率的动态环境.
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| 关 键 词： | 捕获 直接序列扩频信号 大动态 快速傅里叶变换(FFT) |
| 收稿时间： | 2009-04-03 |
Fast Acquisition Method for High Dynamic DSSS Signal |
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| WANG Yong-qing,GAO Lei and WU Si-liang. Fast Acquisition Method for High Dynamic DSSS Signal[J]. Journal of Beijing Institute of Technology(Natural Science Edition), 2010, 30(1): 92-95 |
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| Authors: | WANG Yong-qing GAO Lei WU Si-liang |
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| Affiliation: | 1.Radar Research Laboratory;Beijing Institute of Technology;Beijing 100081;China;2.Shanghai Institute of Space Electronic Technology;Shanghai 201109;China |
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| Abstract: | In view of the acquisition problem for high dynamic direct sequence spread signals,a new method of acquisition is presented.The method completes signal acquisition by twice frequency domain search based on fast Fourier transform.In this method,the whole range of Doppler frequency for signals is searched in addition with a second round verification.Analysis and simulation results indicate that the principle of the method is correct and it has better acquisition accuracy and great performance especially for h... |
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| Keywords: | acquisition direct sequence spread spectrum signal high dynamic fast Fourier transform(FFT) |
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