Digital Envelope Detection: The Good, the Bad, and the Ugly

Rick Lyons
10 comments

Recently I've been thinking about the process of envelope detection. Tutorial information on this topic is readily available but that information is spread out over a number of DSP textbooks and many Internet web sites. The purpose of this blog is to summarize various digital envelope detection methods in one place. Here I focus of envelope detection as it is applied to an amplitude-fluctuating sinusoidal signal where the positive-amplitude fluctuations (the sinusoid's envelope) contain some sort of information. Let's begin by looking at the simplest envelope detection method.



Comments:

runner
Said:
good
2 years ago
+1
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JosephK
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good
1 year ago
0
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Ahmed_Amer
Said:
cool
11 months ago
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SangkoogChoi
Said:
good
10 months ago
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LongXin
Said:
why I can't even read or download free stuffs here please?
thanks
7 months ago
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mbados
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ok
6 months ago
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bokki
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thanks in advance
4 months ago
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chalil
Said:
nice, one practical tip - replacing the generic lowpass filter with a CIC decimator (+ CFIR + PFIR) will make the Figure 7 more efficient. so that the abs(.) operation is required to be performed at very low sampling rate, typically 1/256 or so ...
2 weeks ago
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