System identification by matlab

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linhtuptit
linhtuptit 2017-4-8
评论： Star Strider 2017-4-8
I am trying to determine an unknown block wherein output signal's amplitude of this block equals to a half of input signal's amplitude but remains signal feature (both input and output signal are same as can be seen in the attached figure). So what kind of unknown blocks (filters or something like that) can execute these functions? Many thank for helps.
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Star Strider
Star Strider 2017-4-8
‘... as can be seen in the attached figure ...’
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