Systems and methods for integrating asynchronous signals in distributed antenna system with direct digital interface to base station
First Claim
1. A signal interface unit in a radio system, comprising:
- an external device interface configured to receive a downlink asynchronous radio carrier signal for a radio frequency carrier from an external device;
clock conversion circuitry communicatively coupled to the external device interface and including a resampling filter configured to re-clock the downlink asynchronous radio carrier signal to a master clock of the radio system from a clock of the external device by at least converting first samples of a channelized radio carrier synchronous with a first clock of a first clock domain to second samples synchronous with a second clock of a second clock domain; and
an antenna side interface configured to communicate at least one of the re-clocked downlink asynchronous radio carrier signal and a downlink digitized radio frequency signal that is based on the re-clocked downlink asynchronous radio carrier signal to an antenna unit.
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Accused Products
Abstract
A signal interface unit in a radio system includes an external device interface configured to receive a downlink asynchronous radio carrier signal for a radio frequency carrier from an external device; a clock conversion unit communicatively coupled to the external device interface and configured to re-clock the downlink asynchronous radio carrier signal to a master clock of the radio system from the clock of the external device; and an antenna side interface configured to communicate at least one of the re-clocked downlink asynchronous radio carrier signal and a downlink digitized radio frequency signal based on the re-clocked downlink asynchronous radio carrier signal to an antenna unit.
191 Citations
28 Claims
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1. A signal interface unit in a radio system, comprising:
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an external device interface configured to receive a downlink asynchronous radio carrier signal for a radio frequency carrier from an external device; clock conversion circuitry communicatively coupled to the external device interface and including a resampling filter configured to re-clock the downlink asynchronous radio carrier signal to a master clock of the radio system from a clock of the external device by at least converting first samples of a channelized radio carrier synchronous with a first clock of a first clock domain to second samples synchronous with a second clock of a second clock domain; and an antenna side interface configured to communicate at least one of the re-clocked downlink asynchronous radio carrier signal and a downlink digitized radio frequency signal that is based on the re-clocked downlink asynchronous radio carrier signal to an antenna unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method comprising:
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receiving a downlink asynchronous radio carrier signal for a radio frequency carrier at a signal interface unit within a radio system from an external device; re-clocking, using a resampling filter at the signal interface unit, the downlink asynchronous radio carrier signal to a master clock of the radio system from a clock of the external device by at least converting first samples of a channelized radio carrier synchronous with a first clock of a first clock domain to second samples synchronous with a second clock of a second clock domain; and communicating at least one of the re-clocked downlink asynchronous radio carrier signal and a downlink digitized radio frequency signal that is based on the re-clocked downlink asynchronous radio carrier signal from the signal interface unit to an antenna unit. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification