On Fast Converging Data-Selective Adaptive Filtering

Abstract

The amount of information currently generated in the world has been increasing exponentially, raising the question of whether all acquired data is relevant for the learning algorithm process. If a subset of the data does not bring enough innovation, data-selection strategies can be employed to reduce the computational complexity cost and, in many cases, improve the estimation accuracy. In this paper, we explore some adaptive filtering algorithms whose characteristic features are their fast convergence and data selection. These algorithms incorporate a prescribed data-selection strategy and are compared in distinct applications environments. The simulation results include both synthetic and real data.

Keywords

• adaptive signal processing
• adaptive filters
• parameter estimation
• system identification
• equalization
• prediction
• learning systems
• data processing
• LMS-Newton
• conjugate gradient