可观测性分析是无源定位与跟踪系统的前提和基础，只有满足可观测条件才能对系统进行正确求解。
Observability analysis is the basic and prime task in passive localization and tracking system, for only when the system is observable, it can be determined with unique and definite solution.
针对光波导电场传感器无源工作的特点，分析了电场传感器工作点对传感灵敏度、线性动态范围的影响。
For passive working electric field sensors, the effects of bias point on the performances including sensitivity and linear dynamic range are analyzed.
根据小波分析理论，针对无源北斗导航定位系统初始校频问题，提出了一种基于小波分析的信号特征提取算法。
According to wavelet analysis theory, a signal picking up algorithm based on wavelet analysis is proposed to solve problem of passive CNS initial frequency calibration.
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