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本文讨论了数字横向滤波器实现频率鉴别的原理。具体分析了利用自相关及自复卷积方法实现频率鉴别的方法,得出了鉴频特性斜率值及鉴频带宽的关系式,计算并给出了鉴频特性∑I~ω、ΔQ~ω的关系曲线。这种频率鉴别方法可以用在接收相参系统中的自动频率微调。
This article discusses the principle of digital transverse filter to achieve frequency identification. The method to realize frequency identification by autocorrelation and self - convolution is analyzed in detail, and the relationship between the frequency of frequency discrimination and the bandwidth of frequency discrimination is obtained. The frequency discrimination characteristics ΣI ~ ω, ΔQ ~ ω The relationship curve. This frequency identification method can be used to receive automatic frequency trimming in coherent systems.