| DS/FH扩频测控信号同步方案的捕获性能 |
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| 引用本文： | 孟生云,杨文革,王金宝,路伟涛.DS/FH扩频测控信号同步方案的捕获性能[J].宇航学报,2010,31(8). |
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| 作者姓名： | 孟生云 杨文革 王金宝 路伟涛 |
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| 作者单位： | 装备指挥技术学院测控工程研究中心,北京,101416 |
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| 基金项目： | 武器装备预研基金资助项目 |
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| 摘 要： | 针对航天测控信号的高动态以及由载频跳变引起的多普勒频率周期跳变的特点,提出了一种基于快速频率识别和辅助机制的直扩/跳频(DS/FH)混合扩频测控信号的一种同步方案。建立了跳频图案,伪码相位及多普勒频率的三维同步捕获状态转移过程的数学模型,推导出三维捕获的平均捕获时间表达式,及在伪码相位误差、多普勒频移和高斯白噪声条件下的检测概率和虚警概率表达式。仿真分析了在采用时域匹配滤波、频域多通道的直扩捕获方式下,信号和捕获系统参数对三维捕获性能的影响。理论推导与数值仿真结果表明了同步方案的有效性,并为信号设计及捕获系统参数选择提供了理论依据和实际参考。
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| 关 键 词： | 测控 直扩/跳频扩频 三维同步 捕获性能 平均捕获时间 |
Acquisition Performance of a Synchronization Scheme of DS/FH Spread Spectrum TTC Signals |
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| MENG Sheng-yun,YANG Wen-ge,WANG Jin-bao,LU Wei-tao.Acquisition Performance of a Synchronization Scheme of DS/FH Spread Spectrum TTC Signals[J].Journal of Astronautics,2010,31(8). |
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| Authors: | MENG Sheng-yun YANG Wen-ge WANG Jin-bao LU Wei-tao |
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| Institution: | MENG Sheng-yun,YANG Wen-ge,WANG Jin-bao,LU Wei-tao(TTC Research Center,the Academy of Equipment Command & Technology,Beijing 101416,China) |
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| Abstract: | For the high dynamic characteristics of TTC signals and doppler shift periodic hopping caused by carrier frequency hopping,a synchronization scheme of DS/FH spread spectrum signals based on a fast frequency identification method and aiding mechanism is proposed.The state transition mode of three-dimensional synchronization process in frequency hopping pattern,PN code phase and Doppler shift is given,and the expressions of the mean acquisition time and both detection probabilty and false alarming probability... |
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| Keywords: | TTC DS/FH spread spectrum Three-dimensional synchronization Acquisition performance Mean acquisition time |
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