A method and system is disclosed for designing a radio for down-converting RF signals to IF signals by sampling the signals in a round-robin sampling circuit and multiplying the samples by coefficients that are changed at a fixed rate equal to the rate of operation of each of the sampling circuits. Such operation includes ascertaining which of the plurality of sub-carriers have a channel quality that satisfies one or more criteria. The memory address remapping circuitry also includes a selection circuit responsive to the comparison circuit to output a physical address.