Algorithm 1 Geo-location information aided spectrum sensing.

Input:${\mathbf{\Theta }}_{q,L}$, ${\mathbb{C}}_{q,L}$, $T_{qk}$, WFPD. % for the q-th SUE, $q=1,2,\cdots ,Q$ Output:$\mathrm{PUT}\_\mathrm{Flag}\_q$.  1:train the q-th T1-SVM classifier via $\{{\mathbf{\Theta }}_{q,L},{\mathbb{C}}_{q,L}^{\left(1\right)}\}$  2:train the q-th T2-SVM classifier via ${\{{\breve{\mathbf{\Theta }}}_{q,h},{\mathbb{C}}_{q,h}^{\left(2\right)}\}}_{h=0}^{2^P-1}$  3:the q-th SUE estimates K TOAs (fingerprint) from the K BSs over $F_1$  4:if${\beta }_{q^{\ast }}<\psi$ and it satisfies (15) then  5:    the estimated fingerprint best matches the $q^{\ast }$-th WFP in the WFPD  6:    the q-th SUE is located in the $q^{\ast }$-th grid  7:else return to step 2  8:end if  9:the q-th SUE reads the labels in the $q^{\ast }$-th WFP and obtain 10:   $\left\{\mathrm{PUT}\_\mathrm{Position}\_\mathrm{Flag}\_q^{\ast },\mathrm{Update}\_\mathrm{Timer}\_q^{\ast },\mathrm{PUT}\_\mathrm{Flag}\_q^{\ast }\right\}$ 11:if$\mathrm{PUT}\_\mathrm{Position}\_\mathrm{Flag}\_q^{\ast }=1$then 12:    if $\mathrm{Update}\_\mathrm{Timer}\_q^{\ast }<\phi$ then 13:        if $\mathrm{PUT}\_\mathrm{Flag}\_q^{\ast }\ne 0$ then 14:           output $\mathrm{PUT}\_\mathrm{Flag}\_q=\mathrm{PUT}\_\mathrm{Flag}\_q^{\ast }$ 15:           Exit to step 33 16:        end if 17:    end if 18:end if 19:if$\mathrm{Update}\_\mathrm{Timer}\_q^{\ast }=\phi$ or $\mathrm{PUT}\_\mathrm{Flag}\_q^{\ast }=0$ then the q-th SUE 20:    % single-SUE prediction 21:    obtains the sensing observation ${\mathit{\theta }}_q$ over the LFB $F_2$ 22:    predicts the state of the PUTs as ${\widehat{\mathcal{C}}}_{q^{\ast }}^{\left(1\right)}$ via ${\mathit{\theta }}_q$ and the trained T1-SVM classifier 23:    predicts $\mathrm{PUT}\_\mathrm{Flag}\_q^{\ast }$ as ${\widehat{\mathcal{C}}}_{q^{\ast }}^{\left(2\right)}$ via ${\mathit{\theta }}_q,{\widehat{\mathcal{C}}}_{q^{\ast }}^{\left(1\right)}$ and the trained T2-SVM classifier 24:    if Joint-SUE prediction is required then 25:        reads received signals of the $|{\mathbb{Q}}_q|$ grids that neighbor the $q^{\ast }$-th grid 26:        predicts $\mathrm{PUT}\_\mathrm{Flags}\_q^{\prime },q^{\prime }\in \left\{{\mathbb{Q}}_q\right\}$ independently, via single-SUE prediction 27:        obtains $\mathrm{PUT}\_\mathrm{Flag}\_q^{\ast }$ by HDF voting based on $\mathrm{PUT}\_\mathrm{Flags}\_q^{\prime },q^{\prime }\in \{{\mathbb{Q}}_q\cup \left\{q^{\ast }\right\}\}$ 28:    end if 29:    update $\mathrm{PUT}\_\mathrm{Flag}\_q^{\ast }$ in the $q^{\ast }$-th WFP 30:    clear and restart $\mathrm{Updata}\_\mathrm{Timer}\_q^{\ast }$ in the $q^{\ast }$-th WFP 31:end if 32:output $\mathrm{PUT}\_\mathrm{Flag}\_q=\mathrm{PUT}\_\mathrm{Flag}\_q^{\ast }$ 33:if A new sensing request occurs then return to step 2 35:Exit