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Digital beamforming in a satellite communication system

  • US 6,016,124 A
  • Filed: 04/06/1998
  • Issued: 01/18/2000
  • Est. Priority Date: 04/07/1997
  • Status: Expired due to Fees
First Claim
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1. A reduced rate beamforming network comprising:

  • a plurality of digital input signals that represent voice or data messages;

    a plurality of bit stream formatters, each bit stream formatter coupled to one of the plurality of digital input signals to generate a predetermined format signal;

    a plurality of symbol generators, each symbol generator coupled to one of the plurality of bit stream formatters, each symbol generator transforming the predetermined format signal into a series of symbols;

    a beamforming matrix connected directly to the plurality of symbol generators, the beamforming matrix generating a plurality of baseband beam signals from the plurality of series of symbols; and

    a plurality of baseband low-pass filters coupled to the beamforming matrix, each of the filters coupled to a different baseband beam signal of the plurality of baseband beam signals, the low-pass filters generating a plurality of antenna feed signals from the plurality of baseband beams signals.

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