Algorithm 1 Construct of Beamformer

1:Set the iteration index $i=0$, and define algorithm termination conditions, namely, maximum iterations ($i_{max}$), and precision level ($ϵ$). 2:Select an objective function from (14), and initialize beamformers ${\left\{{\mathbf{w}}_k^{\{int.\}}\right\}}_{k=1}^K$ using PEV scheme in [27]. 3:Compute $J^{\left(i\right)}\left({\left\{{\mathbf{w}}_k\right\}}_{k=1}^K;C;L\right)$ using ${\left\{{\mathbf{w}}_k^{\{int.\}}\right\}}_{k=1}^K$. 4:repeat 5:    $i=i+1$ 6:    Compute $J^{\left(i\right)}\left({\left\{{\mathbf{w}}_k\right\}}_{k=1}^K;C;L\right)$ using ‘interior-point’ method in (13). 7:    Update local optimal beamformer ${\left\{{\mathbf{w}}_k^{lo}\right\}}_{k=1}^K$. 8:    if $\left\{\right|{\mathit{J}}^{\left(i\right)}(.)-{\mathit{J}}^{(i-1)}(.)|\ge ϵ\}\&\&\{i_{}\le i_{max}\}$ then 9:        set  Condition = false. 10:    else 11:        set  Condition = true. 12:    end if 13:until {Condition = true}