@article {855, title = {Fast orthonormal sparsifying transforms based on Householder reflectors}, journal = {IEEE Transactions on Signal Processing}, volume = {64}, year = {2016}, month = {12/2016}, pages = {6589-6599}, keywords = {compass, compressed sensing}, doi = {10.1109/TSP.2016.2612168}, author = {C. Rusu and Nuria Gonz{\'a}lez-Prelcic and R.W. Heath Jr.} }