| 动态环境下数字化DS/BPSK接收机捕获电路 |
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| 引用本文： | 陈实如,郝燕玲,张京娟.动态环境下数字化DS/BPSK接收机捕获电路[J].电子学报,2003,31(12):1878-1881. |
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| 作者姓名： | 陈实如 郝燕玲 张京娟 |
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| 作者单位： | 哈尔滨工程大学自动化学院,黑龙江,哈尔滨 150001 |
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| 摘 要： | 提出了一种全数字化扩频序列捕获电路,建立了接收机动态环境下捕获电路的数学模型,分析了多普勒频移、伪码相位差和信号载噪比对电路捕获性能的影响.提出了一种提高电路捕获性能的改进方案.分析表明改进后的捕获电路具有检测概率高和虚警概率低的特点,可有效地缩短电路的平均捕获时间.
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| 关 键 词： | DS/BPSK 多普勒频移 捕获 接收机 |
| 文章编号： | 0372-2112(2003)12-1878-04 |
| 收稿时间： | 2002-07-02 |
Acquisition Circuit of Digital DS/BPSK Receiver Operating in Dynamic Situation |
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| CHEN Shi ru,HAO Yan ling,ZHANG Jing juan.Acquisition Circuit of Digital DS/BPSK Receiver Operating in Dynamic Situation[J].Acta Electronica Sinica,2003,31(12):1878-1881. |
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| Authors: | CHEN Shi ru HAO Yan ling ZHANG Jing juan |
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| Affiliation: | Automation College.Harbin Engineering University.Harbin,Heilongjiang 150001,China |
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| Abstract: | A digital DS/BPSK code acquisition circuit is proposed,and the mathematics model is derived when the receiver operates in high dynamic situation.The effect of Doppler frequency shift and PN phase error on the acquisition performance is analyzed.A scheme used to improve the probability of detection,and decrease the probability of false alarm is introduced.According to the analysis,the improved digital code acquisition circuit has higher probability of detection and lower probability of false alarm,and can be adopted for shortening the acquisition time effectively. |
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| Keywords: | DS/BPSK Doppler frequency shift Acquisition Receiver |
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