Efficient approach to noise suppression in adaptive filtering subject to output envelope constraints

Median smoothing is incorporated into the recently developed adaptive envelope-constrained filtering algorithms with a view to suppressing the effect of impulsive noise at the input channel. It is demonstrated that the proposed adaptive filtering algorithms can provide notable improvements in the performance. In particular, the output envelope constraints of primary interest can be more easily satisfied by the filter weight estimate obtained with the median smoothing than with the average smoothing in impulsive noise situations.