宽带多体制信号目标模拟器校准技术的研究

Research of wide band multi-type signal target simulator calibration Technology

用于情报侦察任务的目标模拟器具有体制复杂,信号类型多样,带宽较宽的特点。针对目前常规计量标准只能对单一体制信号进行校准并且带宽较窄的局限性,研究了一种宽带多体制信号校准装置。该校准装置自主设计了宽带变频器,并且采用数字滤波的方法进行信号分离,最终通过数字解调和分析得到分离后的单一信号的特征指标并且与定标值进行比较。研究表明,该校准装置最终分析结果与定标值一致性很好,满足指标要求,最后对该校准装置的不确定度进行分析。

Target simulator of the intelligence reconnaissance mission has complex system, multitype, wide bandwidth characters. In view of the limitation that the current conventional measurement standards can only calibrate single system signal and have narrow bandwidth, a kind of broadband multi-system signal calibration equipment is studied in this article. The calibration device independently designs a broadband frequency converter, and uses digital filtering method to separate the signals. Finally, through digital demodulation and analysis, the characteristic index of the separated single signal is obtained and compared with the calibration value. The results show that the final analysis results of the calibration device are in good agreement with the calibration values and meet the requirements of the indicators. Finally, the uncertainty of the calibration device is analyzed.