Determination of D_k,0(t) using correlation between the instantaneous amplitudes

Setting D_k,0 to any value within $[-\pi/2, \pi/2]$, we can determine $\hat{C}_{k,1}(t)$ at any D_k,0 using the above method. An optimal solution $\hat{D}_{k,0}$ is determined by

$$\hat{D}_{k,0}=\mathop{\arg\max}_{-\pi/2 \leq D_{k,0} \leq \pi... ...t\vert\hat{A}_k\vert\vert \vert\vert\hat{\hat{A}}_k\vert\vert}$$ (33)

where $\hat{A}_k(t)$ is the instantaneous amplitude determined by $\hat{C}_{k,1}$, and $\hat{\hat{A}}_k(t)$ is determined by Eq. (32).