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Apparatus and method for remote beam forming for satellite broadcasting systems

  • US 8,098,612 B2
  • Filed: 05/16/2008
  • Issued: 01/17/2012
  • Est. Priority Date: 05/21/2007
  • Status: Active Grant
First Claim
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1. For an integer N that is greater than one and an integer M that is greater than N−

  • 1, a satellite broadcasting system includes;

    a satellite segment comprising;

    a downlink broadcast antenna array including N elements;

    a wavefront de-multiplexer having at least N outputs configured to drive corresponding ones of the N downlink broadcast antenna array elements, and M inputs;

    a frequency-domain de-multiplexer unit configured to demultiplex and frequency-convert uplink signals; and

    an uplink receive antenna configured to receive the uplink signals;

    a ground segment comprising;

    at least one digital beam forming (DBF) processor configured to multiply a content data stream with an N-component beam weight vector (BWV) to create an N-component product vector;

    a wavefront multiplexer having at least N inputs driven by corresponding ones of the N-component product vector, and M outputs;

    a frequency-domain multiplexer unit configured to frequency up-convert and modulate the M outputs of the wavefront multiplexer to generate the uplink signals; and

    an uplink transmit antenna configured to transmit the uplink signals; and

    a user segment comprising at least one user receiving at least one beam from the downlink broadcast antenna array of the satellite segment.

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