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Xavier Andrade edited Theory.tex
over 9 years ago
Commit id: c4c3efcdf1f8ab5f48382e4c44b49b4bcfd75ae4
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Given the matrix \(P\) or equivalently the basis \(\{\phi_i\}\), compressed sensing allows to reconstruct the full matrix \(A\) sampling \texit{some} of the entries of \(B\). The reconstruction is done by solving the basis pursuit problem (BP),
\begin{align}
\label{eq:bpdn}
\min_{A} ||A||_1 \quad \textrm{subject to} \quad
\(PAP^T\)_{ij} (PAP^T)_{ij} = B_{ij}\quad
\forall i,j \in
R\ ,
\end{align}
where the 1-norm is considered as a \emph{vector} norm
(\(||A||_1 = \sum_{i,j} \left|A_{ij}\right|\)).