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EQUALIZING DISTRIBUTED ANTENNA SYSTEM EQUIPPED WITH MULTIPLE BASE STATION INTERFACE PORTS

  • US 20160352497A1
  • Filed: 05/18/2016
  • Published: 12/01/2016
  • Est. Priority Date: 06/01/2015
  • Status: Active Grant
First Claim
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1. A system for optimizing ripple reductions in a distributed antenna system (DAS), comprising:

  • at least one radio interface module (RIM), comprising;

    at least one downlink port configured to receive a downlink communications signal in a downlink frequency spectrum from a signal source;

    a downlink interface configured to provide the downlink communications signal to a downlink path; and

    a downlink equalizer configured to minimize downlink ripple in the at least one RIM based on a predetermined downlink equalizer setting; and

    a control system configured to;

    command the downlink equalizer to go through a plurality of downlink equalizer states based on a plurality of downlink digital words, respectively;

    for each downlink equalizer state of the plurality of downlink equalizer states;

    provide a downlink test signal to the at least one downlink port, wherein the downlink test signal comprises one or more predefined downlink frequency steps across the downlink frequency spectrum of the downlink communications signal; and

    measure and record a respective downlink ripple in association with each downlink equalizer state of the plurality of downlink equalizer states based on the downlink test signal;

    examine a plurality of recorded downlink ripples corresponding to the plurality of downlink equalizer states, respectively; and

    define the predetermined downlink equalizer setting as a downlink equalizer state among the plurality of downlink equalizer states associated with a smallest recorded downlink ripple among the plurality of recorded downlink ripples.

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