Alert!
CVXMOD is discontinued!
Unfortunately CVXMOD has not been developed since 2008. It is incomplete, somewhat buggy and not supported. Please instead try the replacement package CVXPY. Or, try CVXOPT if you are prepared to work at a lower level, CVX if you are ok with Matlab, or CVXGEN if you want small (but super high speed) QP solvers.
Various CVXMOD examples from Boyd & Vandenberghe's book.
and 
spike signal reconstruction