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I am reading a paper, and the author claimed that in asymptotic sense as M goes to infinite:

[tex]\sum_{i=1}^M\sum_{l=0}^L|h_i(l)|^2=M[/tex]

where:

[tex]\sum_{l=0}^L\mathbb{E}\left\{|h_i(l)|^2\right\}=1[/tex].

How is that asymptotic follows?

Thanks in advance

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# Aysmptotic Approximation

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