lixiang

[\begin{array}{c}
{{\rm{S}}{{h{norm}}}}{\rm{(}}{{\rm{f}}_i}{\rm{) = }}\frac{{\frac{{\sigma _\omega ^2}}{{|1 - \kappa \exp ( - j2\pi {f_i}){|^2}}}}}{{\sum\limits_k {\frac{{\sigma _\omega ^2}}{{|1 - \kappa \exp ( - j2\pi {f_k}){|^2}}}} }}\
{\rm{ = }}\frac{1}{{\sum\limits_k {\frac{{|1 - \kappa \exp ( - j2\pi {f_i}){|^2}}}{{|1 - \kappa \exp ( - j2\pi {f_k}){|^2}}}} }}
\end{array}]

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