EQUALIZING DISTRIBUTED ANTENNA SYSTEM EQUIPPED WITH MULTIPLE BASE STATION INTERFACE PORTS
First Claim
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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Accused Products
Abstract
Optimizing ripple reductions in equalizers shared between multiple interface ports in a distributed antenna system (DAS). In one aspect, a downlink equalizer is shared between a downlink simplex port and a duplex port in a radio interface module(s) (RIM(s)) in the DAS. In another aspect, to optimize ripple reduction in the downlink equalizer, the downlink equalizer is configured to go through a plurality of downlink equalizer states that each can generate a downlink equalizer frequency response affecting downlink ripple of the RIM(s). At each of the downlink equalizer states, a test signal is provided to the downlink equalizer and a corresponding downlink ripple of the RIM(s) is recorded. When all of the downlink equalizer states are evaluated based on the test signal, the downlink equalizer is configured to function based on the downlink equalizer state associated with the smallest downlink ripple of the RIM(s).
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Citations
25 Claims
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1. A system for optimizing ripple reductions in a distributed antenna system (DAS), comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for optimizing ripple reductions in a distributed antenna system (DAS), comprising:
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communicatively coupling a control system to at least one radio interface module (RIM) configured to communicate a downlink communications signal in a downlink frequency spectrum; commanding a downlink equalizer in the at least one RIM 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; providing a downlink test signal comprising one or more predefined downlink frequency steps across the downlink frequency spectrum of the downlink communications signal; and measuring and recording a respective downlink ripple of the at least one RIM in association with each downlink equalizer state of the plurality of downlink equalizer states based on the downlink test signal; examining a plurality of recorded downlink ripples corresponding to the plurality of downlink equalizer states, respectively; defining a 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; and configuring the downlink equalizer to minimize downlink ripple of the at least one RIM based on the predetermined downlink equalizer setting. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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Specification