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Preamble detection with multiple receive antennas

  • US 8,571,148 B1
  • Filed: 08/07/2012
  • Issued: 10/29/2013
  • Est. Priority Date: 05/31/2006
  • Status: Active Grant
First Claim
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1. A system, comprising:

  • a control module configured toreceive signals via a plurality of antennas, wherein the signals include subcarriers having frequencies in a frequency band, anddivide 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 togenerate 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 togenerate 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, anddetect 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.

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