Non Convex Compressed Sensing for Non Gaussian Noise

optimization of the form
min ||x||_p subject to ||y-Ax||_q<e

p should be between 0 and 1 to promote sparsity.
q should be decided by the type of noise:
Gaussian 2
Speckle 1
Poisson 3

Before using this toolbox please replace the lsqr.m file in your matlab toolbox sparfun with the lsqr.m provided with this package.

Please add Sparco from www.cs.ubc.ca/labs/scl/sparco/
to ur matlab path for operators