Gain level control circuit supporting dynamic gain control in a wireless communications system (wcs)

A wireless distribution system (WDS), comprising:

• a plurality of remote units;
• and
• a head-end unit (HEU) coupled to the plurality of remote units via a plurality of optical communications mediums, respectively, the HEU configured to:
• distribute a plurality of downlink optical communications signals to the plurality of remote units via the plurality of optical communications mediums, respectively;
• and
• receive a plurality of uplink optical communications signals from the plurality of remote units via the plurality of optical communications mediums, respectively;
• wherein the HEU comprises a gain level control circuit, the gain level control circuit comprises:
• a digital signal distribution circuit comprising a plurality of digital signal inputs and a plurality of digital signal outputs, the digital signal distribution circuit configured to:
• receive a plurality of first digital communications signals having a plurality of first digital amplitudes from the plurality of digital signal inputs, respectively;
• and
• generate a plurality of second digital communications signals having a plurality of second digital amplitudes at the plurality of digital signal outputs based on the plurality of first digital communications signals, wherein each of the plurality of second digital amplitudes is represented up to a full-scale digital amplitude in a predefined number of binary bits;
• and
• a digital signal processing circuit coupled to the plurality of digital signal inputs, the digital signal processing circuit configured to:
• determine that a selected second digital communications signal among the plurality of second digital communications signals has a selected second digital amplitude among the plurality of second digital amplitudes approaching the full-scale digital amplitude that can be represented by the predefined number of binary bits;
• determine a selected first digital communications signal among the plurality of first digital communications signals having a selected first digital amplitude causing the selected second digital amplitude to approach the full-scale digital amplitude;
• and
• control the digital signal distribution circuit to adjust the selected first digital amplitude.