Patent ID: 8571148

Claim:
A system, comprising: a control module configured to receive signals via a plurality of antennas, wherein the signals include subcarriers having frequencies in a frequency band, and divide the frequency band into a plurality of sub-bands, wherein one of the plurality of sub-bands includes a plurality of the subcarriers; and a correlation module configured to generate sets of correlation values by correlating symbols in the sub-bands with a plurality of preamble sequences, wherein one of the sets of correlation values is generated for one of the plurality of antennas and is generated based on the plurality of preamble sequences, wherein the control module is further configured to generate a plurality of sums by adding selected correlation values from the sets, wherein the selected correlation values in one of the plurality of sums are generated respectively for the plurality of antennas and are generated based on one of the plurality of preamble sequences, and detect one of the preamble sequences in the signals by determining whether a largest one of the plurality of sums is greater than or equal to a predetermined threshold.