A system includes a correlation module and a control module. The correlation module is configured to generate correlation values based on a correlation of modulated signals with a plurality of preamble sequences and generate correlation values. The modulated signals include sub-carriers modulated using orthogonal frequency domain multiplexing (OFDM). The control module is configured to select a largest correlation value from the correlation values and detect one of the preamble sequences in the modulated signals upon determining that a magnitude of the largest correlation value is greater than or equal to a first predetermined threshold. The control module divides N of the sub-carriers into L bands in response to a channel gain of the sub-carriers not being substantially the same for all of the sub-carriers, where N and L are integers greater than 1, and where each of the L bands includes N/L of the sub-carriers.