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本文研讨了用在图数转换仪中的高精度同步相敏检波系统主通道性能的最优化问题。给出高斯白噪声最优组合带通滤波器的设计准则,导出最优组合带通滤波器与接收传感器噪声的数学模型;采用精度双平衡技术,设计出低电平高精度同步相敏检波开关。用灵敏度理论,导出参数小误差的附加作用使系统性能变坏程度的数学模型,进而给出高精度同步相敏检波系统、按重要信号抗干扰探测滤波和信息传递多判据最优化的数学模型、最后与文献[1]同类系统主通道主要性能对比,本文系统的主要性能比文献[1]要好。
This article discusses the optimization of the main channel performance of a high-precision synchronous phase-sensitive detection system used in a digraph converter. The design criterion of the optimal combined bandpass filter of Gaussian white noise is given and the mathematical model of the optimal combined bandpass filter and receiver noise is deduced. Using the double precision balancing technique, a low level and high precision synchronous phase sensitive detector . Sensitivity theory is used to derive a mathematical model which can make the performance of the system worse by the additional effect of the small error of the parameters. And then the high precision synchronous phase sensitive detection system is given, and the mathematical model optimized by multiple signals with anti-jamming detection and filtering of important signals and information transmission Finally, compared with the main performance of the main system of the same system in literature [1], the main performance of this system is better than [1].