Patent ID: 8165251

Claim:
A filtering process for a stream of OFDM symbols applied to the input of an infinite impulse response (IIR) filter, said stream of OFDM symbols comprising a preamble interval followed by a plurality of data intervals, each data interval having a cyclic prefix followed by a data symbol, said IIR filter comprising a plurality of sequentially connected registers generating an output and having at least one sequentially connected register output fed back to a preceding one of said sequentially connected registers, said sequentially connected registers responsive to a reset signal which initializes said sequentially connected registers, the filtering process comprising the steps: a preamble step performed during said preamble interval where said reset signal is not asserted; a data interval step performed during each said data interval where said reset signal is asserted during each of said cyclic prefixes; and a step of removing a stream of filtered symbols from said IIR filter output.