| 一种可克服非相干数据影响的直扩信号捕获算法 |
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| 引用本文： | 赵春燕,崔嵬.一种可克服非相干数据影响的直扩信号捕获算法[J].电子学报,2011,39(7):1491-1496. |
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| 作者姓名： | 赵春燕 崔嵬 |
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| 作者单位： | 北京理工大学信息与电子学院,北京 100081 |
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| 摘 要： | 本文提出了一种可克服非相干数据调制影响的直扩信号捕获算法.该算法首先通过延迟共轭相乘克服数据位跳变影响,并通过快速傅立叶变换(FFT)计算圆周相关获得接收信号伪码相位的快速预测;然后使用捕获到的伪码相位对接收信号进行解扩,并利用FFT频谱分析完成接收信号载波多普勒频率的捕获.理论分析及仿真均表明,与已有的算法相比,本文提出的算法对数据位跳变时刻不敏感,捕获时间短,适用于非相干数据位调制直扩信号的快速捕获.
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| 关 键 词： | 非相干数据位调制 快速傅立叶变换(FFT) 延迟共轭相乘 捕获时间 信噪比损失 |
| 收稿时间： | 2010-08-02 |
A DS-SS Signal Acquisition Algorithm for Overcoming the Impact of Non-Coherent Data Modulation |
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| ZHAO Chun-yan,CUI Wei.A DS-SS Signal Acquisition Algorithm for Overcoming the Impact of Non-Coherent Data Modulation[J].Acta Electronica Sinica,2011,39(7):1491-1496. |
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| Authors: | ZHAO Chun-yan CUI Wei |
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| Affiliation: | School of Information and Electronics,Beijing Institute of Technology,Beijing 100081,China |
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| Abstract: | This paper proposes a kind of acquisition algorithm for Direct Sequence Spread Spectrum(DS-SS) signal,which can overcome the adverse impact of the non-coherent data modulation effectively.In the algorithm,the received signal is multiplied by its delay conjugate result to eliminate the impact of the data transition.Then the Fast Fourier Transform(FFT) is used to calculate the circular correlation to estimate the PN code phase.After that,we use the estimate result of the PN code phase to despread the received... |
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| Keywords: | non-coherent data modulation fast Fourier transform(FFT) delay conjugate multiply acquisition time signal to noise ratio(SNR) loss |
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