Split structure for adaptive line enhancer

Abstract

A new adaptive line enhancer (ALE) is suggested to speed up the convergence rate for the retrieval of multiple sinusoids corrupted by a wide-band random noise. The proposed ALE structure comprises two transversal linear phase filters connected in parallel, one being antisymmetric and the other symmetric. The two filters are adapted separately using a least-mean-squares algorithm. The convergence characteristics and computational requirements of the new ALE are examined in detail. Simulation results have shown that the split structure ALE can significantly improve the rate of adaptation while still maintaining system simplicity for real-time hardware implementation.