To set up the filter node, we make the following test.

要设置筛选器节点，我们要进行以下测试。

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The article analyses the signal through the method of gaining instant frequency on the base of instant correlation, then we can make up a multicenter matching filter in the FPGA.

通过对信号进行基于瞬时自相关的瞬时频率提取的方法对中频信号进行分析、识别，然后可以在FP - GA内部构造一个多通道匹配滤波器对信号进行匹配。

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The received circuit is make up of magnify, mixing, filter the wave and demodulation circuits. MAX274 chip and wave filtering circuits is designed in detail.

本文设计的地面信号处理电路由信号放大、混频、滤波和解调电路四部分构成，本文重点对采用MAX274集成芯片和滤波电路进行了分析和设计。

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If the lights weren't there, naturally we would approach slowly and carefully and see what other people were doing and filter through, but the traffic lights make us speed up to beat them.

BBC: Viewpoint: Is it time to get rid of traffic lights?