| 一种低信噪比下的伪码快速捕获算法 |
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| 引用本文： | 韩宁,张大伟,尚朝轩.一种低信噪比下的伪码快速捕获算法[J].军械工程学院学报,2011(2):49-51. |
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| 作者姓名： | 韩宁 张大伟 尚朝轩 |
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| 作者单位： | 军械工程学院光学与电子工程系;北京跟踪与通信研究所; |
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| 摘 要： | 传统的伪码捕获算法消耗时间长且在低信噪比条件下伪码捕获虚警率高,针对该问题,提出了一种低信噪比条件下的伪码快速捕获算法。该算法首先利用快速傅里叶变换完成信号相干积累,然后根据频率进行门限判决,从而捕获相应的时域伪码。仿真实验结果表明：该算法可减少伪码捕获时间,降低伪码捕获的虚警概率。
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| 关 键 词： | 伪码 捕获时间 相干积累 低信噪比 |
A Fast Acquisition Algorithm for PRC in Low SNR Environment |
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| HAN Ning,ZHANG Da-wei,SHANG Chao-xuan.A Fast Acquisition Algorithm for PRC in Low SNR Environment[J].Journal of Ordnance Engineering College,2011(2):49-51. |
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| Authors: | HAN Ning ZHANG Da-wei SHANG Chao-xuan |
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| Institution: | HAN Ning1,ZHANG Da-wei2,SHANG Chao-xuan1(1.Department of Optics and Electronics Engineering,Ordnance Engineering College,Shijiazhuang 050003,China,2.Beijing Institute of Tracking and Communication,Beijing 100094,China) |
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| Abstract: | Traditional PRC acquisition algorithm consumes long time and gets high false alarm rate in low SNR environment.To solve the problem,the fast acquisition algorithm in low SNR is put forward.The algorithm first executes the coherent integration by FFT,then based on the judgement of the magnitude of the frequency-domain,the time-domain pseudo random code is caught.The simulation result validates the algorithm and reduces the acquisition time and false alarm rate at the same time. |
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| Keywords: | PRC acquisition time coherent integration low SNR |
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