Systems and methods for integrating asynchronous signals in distributed antenna system with direct digital interface to base station
First Claim
1. A distributed antenna system, comprising:
- a plurality of signal interface circuits configured to receive a plurality of downlink asynchronous radio carrier signals for a plurality of radio frequency carriers from at least one external device, each of the plurality of downlink asynchronous radio carrier signals having a different clock;
wherein the plurality of signal interface circuits is further configured to re-clock the plurality of downlink asynchronous radio carrier signals to a master clock of the distributed antenna system from each different clock of each of the plurality of downlink asynchronous radio carrier signals;
wherein the plurality of signal interface circuits is further configured to convert the re-clocked plurality of downlink asynchronous radio carrier signals to downlink digital signals;
a host circuit communicatively coupled to the plurality of signal interface circuits and configured to combine at least two of the downlink digital signals into an aggregate downlink digital signal;
an antenna circuit communicatively coupled to the host circuit and configured to receive the aggregate downlink digital signal from the host circuit;
wherein the antenna circuit is further configured to convert at least one of the aggregate downlink digital signal and another signal based on the aggregate downlink digital signal into downlink radio frequency signals;
wherein the antenna circuit is further configured to wirelessly transmit the downlink radio frequency signals to at least one subscriber unit.
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Accused Products
Abstract
A distributed antenna system (DAS) includes: signal interface units to receive downlink asynchronous radio carrier signals for radio frequency carriers from external device(s), each having a different clock, the signal interface units configured to: re-clock the downlink asynchronous radio carrier signals to a master clock of the DAS and convert the downlink asynchronous radio carrier signals to downlink digital signals; a host unit communicatively coupled to signal interface units and configured to combine at least two downlink digital signals into an aggregate downlink digital signal; an antenna unit coupled to the host unit and configured to: receive the aggregate downlink digital signal from the host unit, convert the aggregate downlink digital signal(s) and/or another signal based on the aggregate downlink digital signal into downlink radio frequency signals, and wirelessly transmit downlink radio frequency signals to a subscriber unit.
194 Citations
25 Claims
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1. A distributed antenna system, comprising:
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a plurality of signal interface circuits configured to receive a plurality of downlink asynchronous radio carrier signals for a plurality of radio frequency carriers from at least one external device, each of the plurality of downlink asynchronous radio carrier signals having a different clock; wherein the plurality of signal interface circuits is further configured to re-clock the plurality of downlink asynchronous radio carrier signals to a master clock of the distributed antenna system from each different clock of each of the plurality of downlink asynchronous radio carrier signals; wherein the plurality of signal interface circuits is further configured to convert the re-clocked plurality of downlink asynchronous radio carrier signals to downlink digital signals; a host circuit communicatively coupled to the plurality of signal interface circuits and configured to combine at least two of the downlink digital signals into an aggregate downlink digital signal; an antenna circuit communicatively coupled to the host circuit and configured to receive the aggregate downlink digital signal from the host circuit; wherein the antenna circuit is further configured to convert at least one of the aggregate downlink digital signal and another signal based on the aggregate downlink digital signal into downlink radio frequency signals; wherein the antenna circuit is further configured to wirelessly transmit the downlink radio frequency signals to at least one subscriber unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for interfacing a plurality of asynchronous downlink asynchronous radio carrier signals in a distributed antenna system, comprising:
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receiving a plurality of downlink asynchronous radio carrier signals for a plurality of radio frequency carriers at a plurality of signal interface circuits from at least one external device, each of the plurality of downlink asynchronous radio carrier signals having a different clock; re-clocking the plurality of downlink asynchronous radio carrier signals to a master clock of the distributed antenna system from each different clock of each of the plurality of downlink asynchronous radio carrier signals at the plurality of signal interface circuits; converting the re-clocked plurality of downlink asynchronous radio carrier signals to downlink digital signals at the plurality of signal interface circuits; communicating the downlink digital signals from the plurality of signal interface circuits to a host circuit; combining at least two of the downlink digital signals into an aggregate downlink digital signal at the host circuit; communicating the aggregate downlink digital signal from the host circuit to an antenna circuit; and converting at least one of the aggregate downlink digital signal and another signal based on the aggregate downlink digital signal into downlink radio frequency signals at the antenna circuit. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification