Rights Creative Commons: Attribution 3.0 Hong Kong License A HUBER RECURSIVE LEAST SQUARES ADAPTIVE LATTICE FILTER FOR IMPULSE NOISE SUPPRESSION

This paper proposes a new adaptive filtering algorithm called the Huber Prior Error-Feedback Least Squares Lattice (H-PEF-LSL) algorithm for robust adaptive filtering in impulse noise environment. It minimizes a modified Huber M-estimator based cost function, instead of the least squares cost function. In addition, the simple modified Huber M-estimate cost function also allows us to perform the time and order recursive updates in the conventional PEF-LSL algorithm so that the complexity can be significantly reduced to O ( M ) , where M is the length of the adaptive filter. The new algorithm can also be viewed as an efficient implementation of the recursive least M-estimate (RLM) algorithm recently proposed by the authors [I], which has a complexity of O(M' ) . Simulation results show that the proposed H-PEF-LSL algorithm is more robust than the conventional PEFLSL algorithm in suppressing the adverse influence of the impulses at the input and desired signals with small additional computational cost.