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Multi-channel transmitter having an adaptive antenna array

  • US 5,912,927 A
  • Filed: 02/12/1998
  • Issued: 06/15/1999
  • Est. Priority Date: 12/29/1994
  • Status: Expired due to Term
First Claim
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1. A multi-channel transmitter comprising:

  • a channel processing element comprising;

    a channel processor having an input adapted to receive a communication signal from a communication network and a processed digital communication signal output;

    a splitter having an input coupled to the processed digital communication signal output and a plurality of substantially identical processed digital communication signal outputs;

    a plurality of gain and phase adjusters each having an input coupled to one of the substantially identical processed digital communication signal outputs and a phase adjusted signal output; and

    a plurality of digital up-converters, each digital up-converter having an input coupled to one of the phase adjusted signal outputs and each having a digital intermediate frequency output; and

    a plurality of radio frequency processing elements, each radio frequency processing element being coupled to one of the plurality digital intermediate frequency outputs and each radio frequency processing element comprising;

    a digital summer having a plurality of inputs one of which being coupled to the digital intermediate frequency output and having a summed signal output;

    a digital-to-analog converter having an input coupled the summed signal output and an analog intermediate frequency signal output; and

    a radio frequency processor having an input coupled to the intermediate frequency signal output and an amplified radio frequency signal output; and

    an antenna array having a plurality of antenna elements respectively coupled to the plurality of radio frequency processing elements.

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