答案1
您需要设置一对额外的括号,如下所示:
\begin{align}
p_{e,i}(k)=\frac{4}{b_{i}(k)}\left(1-2^{-\frac{b_{i}(k)}{2}}\right)Q\left(\sqrt{\frac{3\ b_{i}(k)\gamma_{i}(k)}{2^{b_{i}(k)}-1}}\right),~\forall~i,~k, \text{even } b_{i}(k).
\label{evenpber}
\end{align}
您需要设置一对额外的括号,如下所示:
\begin{align}
p_{e,i}(k)=\frac{4}{b_{i}(k)}\left(1-2^{-\frac{b_{i}(k)}{2}}\right)Q\left(\sqrt{\frac{3\ b_{i}(k)\gamma_{i}(k)}{2^{b_{i}(k)}-1}}\right),~\forall~i,~k, \text{even } b_{i}(k).
\label{evenpber}
\end{align}