[Tex/LaTex] How to left align a text in IEEEeqnarray environment

Question

I am using IEEEeqnarray environment and want to left align a text. How to do that?

\documentclass[a4paper, 10pt, conference]{ieeeconf}
\usepackage{amsmath} % assumes amsmath package installed
\interdisplaylinepenalty=10000
\begin{document}
\begin{IEEEeqnarray}{C}
    p(t) = \sum_{k=1}^M a_k \cos(k\w_f t + \phi_k) = \sum_{k=1}^M h_k(t) \label{eq:pli} \\
\text{where} 
    h_k(t) = a_k \cos(k\w_f t + \phi_k)  \label{eq:plih}
\end{IEEEeqnarray}
end{document}

Answer 1

without an example, this is untested, but if the IEEE class doesn't provide anything for this, the TeX primitive \noalign probably does something similar to what you need.

... \label{eq:pli}\\
\noalign{\noindent where}
 h_k(t) =