Optimization with few violated constraints for linear bounded error parameter estimation

In the context of linear constrained optimization, we study the problem of finding an optimal solution satisfying all but k of the given n constraints. A solution is obtained by means of an algorithm of the complexity min{O(n/spl middot/k/sup d/), O(n/spl middot/d/sup k+1/)}, where d is the dimension of the problem. We then use these results to solve the problem of robust identification in the presence of outliers in the setting of bounded error parameter identification. Finally, we show that the estimate obtained converges to the true but unknown parameter in the presence of outliers.