Problem 125. Remove DC

Created by AMITAVA BISWAS
Appears in Date & Time II

Difficulty:Rate

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Input x is the sampled signal vector, may have both AC and DC components. Output y should not contain any DC component.

Example:

 Input  x = [  1  2  3  2  1  2  3]
 Output y = [ -1  0  1  0 -1  0  1]

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Last Solution submitted on Mar 06, 2025

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2 Comments

David Verrelli on 11 Nov 2017

The Test Suite is not demonstrating removal of a DC component, as there is no way to identify the AC component in any of the tests! For example, Test 3 has x = 0:100, and from this we are supposed to obtain signalMean = 50. But without any observations to show that at earlier & later times the signal is decreasing with time, like x = [2 1 0:100 99 98], we have no way to know that more observations wouldn't have revealed, say, x = [2 1 0:100 101 102], for which signalMean = 51. And indeed we could get any arbitrary signalMean based on the limited observations in this Test Suite.

Rafael S.T. Vieira on 3 Aug 2020

The DC component of a signal is usually its mean.

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Problem 125. Remove DC

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Problem 125. Remove DC

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