Narrowband Signal Transport Sub-System for Distributed Antenna System
First Claim
1. A narrowband signal transport sub-system for a distributed antenna system, the narrowband signal transport sub-system comprising:
- an input port configured for receiving a broadband downlink signal comprising a plurality of carriers; and
a filter bank configured for generating a set of narrowband downlink signals from the broadband downlink signal, wherein the set of narrowband downlink signals corresponds to a carrier from the plurality of carriers, the filter bank comprising;
demodulators communicatively coupled to the input port and configured for generating respective frequency-shifted downlink signals from the carrier, each of the frequency-shifted downlink signals having a respective frequency shift from a frequency of the carrier, wherein the respective frequency shift is based on a bandwidth of a narrowband channel associated with the carrier, andfilters communicatively coupled to the demodulators and configured for outputting the set of narrowband downlink signals, wherein each of the filters has a passband corresponding to the bandwidth of the carrier and is configured for generating a respective narrowband downlink signal of the set of narrowband downlink signals by filtering a respective one of the frequency-shifted downlink signals.
9 Assignments
0 Petitions
Accused Products
Abstract
Certain aspects involve narrowband signal transport sub-systems for a distributed antenna system (“DAS”). The narrowband signal transport sub-system includes one or more filter banks that are communicatively coupled to a port of a unit in the DAS. The input port can receive a broadband downlink signal that includes multiple carriers. Each filter bank can generate a set of narrowband downlink signals corresponding to a carrier from the broadband downlink signal. Each filter bank can include demodulators and filters. The demodulators can generate respective frequency-shifted downlink signals from the carrier. Each frequency-shifted downlink signal can have a respective frequency shift from the carrier'"'"'s frequency that is based on a respective bandwidth for the carrier. Each filter can have a passband corresponding to the bandwidth of a narrowband channel associated with the carrier and can generate one of the narrowband downlink signals by filtering a respective one of the frequency-shifted downlink signals.
22 Citations
20 Claims
-
1. A narrowband signal transport sub-system for a distributed antenna system, the narrowband signal transport sub-system comprising:
-
an input port configured for receiving a broadband downlink signal comprising a plurality of carriers; and a filter bank configured for generating a set of narrowband downlink signals from the broadband downlink signal, wherein the set of narrowband downlink signals corresponds to a carrier from the plurality of carriers, the filter bank comprising; demodulators communicatively coupled to the input port and configured for generating respective frequency-shifted downlink signals from the carrier, each of the frequency-shifted downlink signals having a respective frequency shift from a frequency of the carrier, wherein the respective frequency shift is based on a bandwidth of a narrowband channel associated with the carrier, and filters communicatively coupled to the demodulators and configured for outputting the set of narrowband downlink signals, wherein each of the filters has a passband corresponding to the bandwidth of the carrier and is configured for generating a respective narrowband downlink signal of the set of narrowband downlink signals by filtering a respective one of the frequency-shifted downlink signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method for generating narrowband signals from a multicarrier signal communicated via a distributed antenna system, the method comprising:
-
receiving a broadband downlink signal comprising signal components for carriers; and for each of the carriers; generating a set of frequency-shifted downlink signals having respective frequency shifts from a frequency of the carrier, wherein each of the frequency shifts is determined based on a bandwidth of a narrowband channel associated with the carrier, and generating narrowband downlink signals by filtering the frequency-shifted downlink signals using filters having respective passbands corresponding to the bandwidth for the carrier. - View Dependent Claims (11, 12, 13, 14, 15, 16)
-
-
17. A distributed antenna system configured for generating narrowband signals from a multicarrier signal, the distributed antenna system comprising:
-
a remote unit; and a unit communicatively couplable to the remote unit and a base station, the unit configured for; receiving broadband downlink signal comprising signal components for carriers, and for each of the carriers; generating a set of frequency-shifted downlink signals having respective frequency shifts from a frequency of the carrier, wherein each of the frequency shifts is determined based on a bandwidth of a narrowband channel associated with the carrier, and generating narrowband downlink signals by filtering the frequency-shifted downlink signals using filters having respective passbands corresponding to the bandwidth for the carrier. - View Dependent Claims (18, 19, 20)
-
Specification