DETERMINING NOISE LEVELS IN FREQUENCY BAND(S) IN DISTRIBUTED ANTENNA SYSTEMS AND ADJUSTING FREQUENCY BAND(S) OF COMMUNICATIONS SIGNALS IN RESPONSE, AND RELATED COMPONENTS, SYSTEMS, AND METHODS
First Claim
1. A noise detection circuit for detecting noise in a distributed antenna system, comprising:
- a scanning circuit configured to;
receive an input distributed antenna system communications signal;
scan the input distributed antenna system communications signal at a plurality of scan frequencies in a frequency spectrum of a distributed antenna system; and
generate a plurality of output scan communications signals each centered at a scan frequency among the plurality of scan frequencies; and
a power detector configured to detect an energy level of the plurality of output scan communications signals and provide a plurality of output signals indicative of noise levels in the distributed antenna system for each of the plurality of scan frequencies.
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Accused Products
Abstract
Determining noise levels in frequency band(s) for communications paths in distributed antenna systems. Noise may be induced in communications paths in distributed antenna system as a result of electromagnetic interference from communications media located in close proximity and/or from other electronic devices. Noise induced on communications media may not be evenly distributed across the frequency spectrum, but instead concentrated in certain portions of the frequency spectrum. The frequency band(s) of communication signals distributed in the distributed antenna systems may be adjusted to be provided outside of frequency band(s) having unacceptable noise levels. In this manner, the communications performance (e.g., the signal-to-noise (S/N) ratio) of communications signals communicated in the distributed antenna systems may be improved.
92 Citations
32 Claims
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1. A noise detection circuit for detecting noise in a distributed antenna system, comprising:
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a scanning circuit configured to; receive an input distributed antenna system communications signal; scan the input distributed antenna system communications signal at a plurality of scan frequencies in a frequency spectrum of a distributed antenna system; and generate a plurality of output scan communications signals each centered at a scan frequency among the plurality of scan frequencies; and a power detector configured to detect an energy level of the plurality of output scan communications signals and provide a plurality of output signals indicative of noise levels in the distributed antenna system for each of the plurality of scan frequencies. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A central unit providing communications signals in a distributed antenna system, comprising:
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at least one communications interface configured to; receive communications signals at a communications frequency for at least one communications service; and communicate the communications signals over at least one communications medium at a tuned frequency between a plurality of remote units; and a controller configured to; select a communications medium among the at least one communications medium for a remote unit among the plurality of remote units; instruct a noise detection circuit to scan the selected communications medium at a plurality of scan frequencies in a frequency spectrum; receive a power level on the selected communications medium at each of the plurality of scan frequencies; and store a scan frequency and power level on the selected communications medium for each of the plurality of scan frequencies. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A distributed antenna system, comprising:
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a plurality of remote units; a plurality of noise detection circuits for detecting noise disposed in each of the plurality of remote units, each of the plurality of noise detection circuits comprising; a scanning circuit configured to; receive an input distributed antenna system communications signal; scan the input distributed antenna system communications signal at a plurality of scan frequencies in a frequency spectrum of a distributed antenna system; and provide a plurality of output scan communications signals each centered at a scan frequency among the plurality of scan frequencies; and a power detector configured to detect an energy level of the plurality of output scan communications signals and provide a plurality of output signals indicative of noise levels in the distributed antenna system for each of the plurality of scan frequencies; a central unit, comprising; at least one communications interface configured to; receive communications signals at a communications frequency for at least one communications service; and communicate the communications signals over at least one communications medium at a tuned frequency between the plurality of remote units; and a controller configured to; select a communications medium among the at least one communications medium for a remote unit among the plurality of remote units; instruct the plurality of noise detection circuits to each scan the selected communications medium at a plurality of scan frequencies in a frequency spectrum; receive a power level on the selected communications medium at each of the plurality of scan frequencies from each of the plurality of noise detection circuits; and store the scan frequency and power level on the selected communications medium for each of the plurality of scan frequencies for each of the plurality of noise detection circuits. - View Dependent Claims (27, 28, 29, 30, 31, 32)
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Specification