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SYSTEMS AND METHODS FOR JOINT BEAMFORMING AND PREAMBLE DETECTION

  • US 20120188058A1
  • Filed: 11/30/2011
  • Published: 07/26/2012
  • Est. Priority Date: 11/30/2010
  • Status: Active Grant
First Claim
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1. An RFID reader system, comprising:

  • an antenna array comprising a plurality of antenna elements;

    a joint beamformer and preamble detector configured to receive inputs from each of the plurality of antenna elements, where the joint beamformer and preamble detector is configured to;

    correlate the inputs from the plurality of antenna elements against a correlation sequence at a plurality of starting sample positions and a plurality of predetermined rates;

    use the correlations to select a starting sample position and rate for decoding the received signal;

    use the correlations to determine beamforming coefficients for combining the inputs from each of the plurality of antenna elements; and

    resample the combined inputs from each of the plurality of antenna elements based upon the selected starting sample position and rate;

    a decoder configured to receive the resampled signal from the joint beamformer and preamble detector and to decode data using the resampled signal.

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