| 宽带干扰下GPS接收机捕获性能的分析 |
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| 引用本文： | 李延辉,王顺李,单宁.宽带干扰下GPS接收机捕获性能的分析[J].舰船电子工程,2005,25(4):9-12,74. |
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| 作者姓名： | 李延辉 王顺李 单宁 |
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| 作者单位： | 华中科技大学电子与信息工程系,武汉,430074 |
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| 摘 要： | 在GPS接收机捕获原理的基础上，分析了GPS接收机的平均捕获时间和捕获时间方差，推导出宽带干扰与噪声的功率谱密度，从而得到检测概率和虚警概率的表达式，最后给出不同中频信噪比以及不同积分时间下的平均捕获时间和平均捕获时间方差与干扰噪声功率比的关系曲线。仿真结果表明宽带干扰功率达到一定值时，对GPS接收机具有较好的干扰效果。
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| 关 键 词： | 宽带干扰 GPS接收机 平均捕获时间 捕获时间方差 |
| 收稿时间： | 2005-03-14 |
| 修稿时间： | 2005-03-142005-03-21 |
An Analysis of the Acquisition Capability of GPS Receivers Under the Broad-band Interference Condition |
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| Li Yanhui,Wang Shunli,San Ning.An Analysis of the Acquisition Capability of GPS Receivers Under the Broad-band Interference Condition[J].Ship Electronic Engineering,2005,25(4):9-12,74. |
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| Authors: | Li Yanhui Wang Shunli San Ning |
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| Abstract: | Based on the acquisition principle of GPS receivers, this paper analyzed the the mean acquisition time and mean acquisition time variance of GPS receivers, deduced the Power spectrum density of broad - band interference and noise, thereby concluding the expressions of detecting probability and false alert probability. Finally, under different intermediate frequency signal noise power ratio and integral time, the curves among acquisition time,acquisition time variance and interference noise power ratio are given. The simulation results have shown that when the broad- band interference power is increased to some degree, it would have a good interference effect on the GPS receivers. |
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| Keywords: | broad- band interference GPS receivers mean acquisition time acquisition time variance |
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