Patent ID: 8019007
Filing Date: 2011-09-13
Classification: H04B,H04L

Abstract:
1. An apparatus comprising: a digital adaptive filter to mitigate flicker noise from a received Orthogonal Frequency-Division Multiplexing (OFDM) signal, wherein the digital adaptive filter comprises: a first path comprising a first pair of analysis-synthesis filters to process the received OFDM signal; a second path, to process the received OFDM signal in parallel to the first path, comprising a second pair of analysis-synthesis filters and a prediction filter to estimate a present value of the flicker noise as linear combination of past flicker noise samples; and a trainer sub-circuit to modify a coefficient of the prediction filter based on a difference between: a known incoming signal, which was filtered by the prediction filter in a training stage, and a locally-generated reference copy of the known signal.