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使用Python使用幅度解调进行载波信号提取

[英]Carrier signal extraction using Amplitude Demodulation using Python

原文 2015-08-21 08:48:21 3 1 python/ signal-processing/ software-defined-radio

I get an IF signal from microwave circuit which looks like this: 我从微波电路收到一个中频信号，如下所示：

As we can see there is a distinct unwanted Amplitude Modulation which is believed to be due to coupling between antennae. 如我们所见，存在明显的不想要的幅度调制，这被认为是由于天线之间的耦合引起的。 This signal will also have a FM modulation. 该信号还将具有FM调制。

I want to remove this AM modulation so that only FM modulation remains. 我要删除此AM调制，以便仅保留FM调制。 I want the carrier signal NOT the AM modulation. 我希望载波信号不是AM调制。 Something like how a Automated Gain Control (AGC) would work. 诸如自动增益控制（AGC）的工作方式。

1 个解决方案

I tried to filter the lower freqs but that dose not removes the AM modulation. 我尝试过滤较低的频率，但该剂量不能消除AM调制。

Well, then you need to adjust your filter. 好吧，那么您需要调整滤波器。 Every kind of AGC is but a high pass filter in effect. 每种AGC实际上都不过是一个高通滤波器。

I want to remove this AM modulation so that only FM modulation remains. 我要删除此AM调制，以便仅保留FM调制。

Seriously, don't do that. 说真的，不要那样做。 FM demodulation doesn't need constant envelope. FM解调不需要恒定的包络。 As a FM demodulator doesn't care the least about amplitude, it will not care about what you consider to be AM. 由于调频解调器并不在乎振幅，因此它不会在乎您认为是AM。

EDIT I though you'd probably already tried, but what about the AGC , AGC2 and AGC3 block in GNU Radio? 编辑我虽然您可能已经尝试过，但是GNU Radio中的AGC ， AGC2和AGC3块呢？