Paper V: Polyphase Signal Calculus

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9 \node[left]at(0,1.5){$a_1=2$};
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13 \node[left]at(0,0.5){$a_2=5$};
14 \node[above]at(0.7,3){$b_0=0$};\node[above]at(2.0999999999999996,3){$b_1=2$};\node[above]at(3.5,3){$b_2=5$};\node[anchor=west,align=left] at(5,2){off-diagonal squared error\\[6pt]$1\cdot 2^2+1\cdot 3^2+1\cdot 5^2$\\[6pt]$=38$};
15 \end{tikzpicture}

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