Method of inserting CDMA beacon pilots in output of distributed remote antenna nodes
First Claim
1. A distributed antenna system to feed remote antenna nodes with simulcast traffic and non-simulcast beacons, the distributed antenna system comprising:
- a host radio frequency (RF) digitizer to input code division multiple access (CDMA) base station signals for simulcast CDMA-traffic-bearing channels and to output digital samples;
a delay buffer communicatively coupled to input the samples output from a beacon pilot generator and to output digitally delayed CDMA-digital-beacon-pilot samples having different pseudo-noise offsets;
a summing circuit to add the CDMA-digital-beacon-pilot samples having different pseudo-noise offsets to the digital samples input from the host RF digitizer to form composite simulcast-plus-uniquely-offset-beacon-pilot CDMA samples; and
a framer/serializer communicatively coupled to input the composite simulcast-plus-uniquely-offset-beacon-pilot CDMA samples and to route the down-link composite simulcast-plus-uniquely-offset-beacon-pilot CDMA samples for distribution to an associated remote antenna node in the distributed antenna system.
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Accused Products
Abstract
A communication system to feed remote antenna nodes with simulcast traffic and non-simulcast beacons is provided. The communication system includes a host radio frequency (RF) digitizer, a delay buffer, a summing circuit, and a framer/serializer. The host RF digitizer receives CDMA base station signals for simulcast CDMA-traffic-bearing channels and to output digital samples. The delay buffer is communicatively coupled to receive the samples output from a beacon pilot generator and to output digitally delayed CDMA-digital-beacon-pilot samples having different pseudo-noise offsets. The summing circuit adds the CDMA-digital-beacon-pilot samples having different pseudo-noise offsets to the digital samples received from the host RF digitizer to form composite simulcast-plus-uniquely-offset-beacon-pilot CDMA samples. The framer/serializer is communicatively coupled to receive the composite simulcast-plus-uniquely-offset-beacon-pilot CDMA samples, and to route the composite simulcast-plus-uniquely-offset-beacon-pilot CDMA samples to an associated remote antenna node.
310 Citations
18 Claims
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1. A distributed antenna system to feed remote antenna nodes with simulcast traffic and non-simulcast beacons, the distributed antenna system comprising:
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a host radio frequency (RF) digitizer to input code division multiple access (CDMA) base station signals for simulcast CDMA-traffic-bearing channels and to output digital samples; a delay buffer communicatively coupled to input the samples output from a beacon pilot generator and to output digitally delayed CDMA-digital-beacon-pilot samples having different pseudo-noise offsets; a summing circuit to add the CDMA-digital-beacon-pilot samples having different pseudo-noise offsets to the digital samples input from the host RF digitizer to form composite simulcast-plus-uniquely-offset-beacon-pilot CDMA samples; and a framer/serializer communicatively coupled to input the composite simulcast-plus-uniquely-offset-beacon-pilot CDMA samples and to route the down-link composite simulcast-plus-uniquely-offset-beacon-pilot CDMA samples for distribution to an associated remote antenna node in the distributed antenna system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A distributed antenna system to feed remote antenna nodes with simulcast code division multiple access (CDMA) traffic and non-simulcast beacon pilots, the distributed antenna system comprising:
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a first digital up-converter to input CDMA digital base station signals from a digital base station and to output digital samples for CDMA-traffic-bearing channels; a second digital up-converter to input digital baseband samples from a baseband beacon pilot generator and to output digital intermediate frequency (IF) samples; a delay buffer communicatively coupled to input the digital IF samples from the second digital up-converter and configured to output CDMA-digital-beacon-pilot samples having different timing offsets; and a summing circuit to form down-link composite simulcast-plus-uniquely-offset-beacon-pilot CDMA samples by summing the digital samples for CDMA-traffic-bearing channels with the CDMA-digital-beacon-pilot samples having different timing offsets, wherein each down-link composite simulcast-plus-uniquely-offset-beacon-pilot CDMA sample is distributed to an associated one of the remote antenna nodes in the distributed antenna system. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method to distribute simulcast code division multiple access (CDMA)-traffic-bearing channels together with non-simulcast CDMA-digital-beacon-pilot samples having different timing-offsets using a single beacon pilot generator, the method comprising:
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inputting CDMA radio frequency signals from a base station at a host radio frequency digitizer; converting CDMA base station signals into digital samples for traffic bearing channels at the host RF digitizer; inputting CDMA-digital-beacon-pilot samples at a delay buffer; simultaneously tapping CDMA-digital-beacon-pilot samples having different timing offsets from the delay buffer; adding the CDMA-digital-beacon-pilot samples having the different timing offsets to the CDMA base station digital samples to form down-link composite simulcast-plus-uniquely-offset-beacon-pilot CDMA samples; inputting composite simulcast-plus-uniquely-offset-beacon-pilot CDMA sample streams at a framer/serializer; and routing each of the composite simulcast-plus-uniquely-offset-beacon-pilot CDMA sample streams from the framer/serializer to an associated remote antenna node in a distributed antenna system. - View Dependent Claims (16)
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17. A host unit to feed remote antenna nodes in a distributed antenna system with simulcast traffic and non-simulcast beacons, the host unit comprising:
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a host radio frequency (RF) digitizer to input code division multiple access (CDMA) base station signals for simulcast CDMA-traffic-bearing channels and to output digital samples; a summing circuit to add CDMA-digital-beacon-pilot samples having different pseudo-noise offsets to the digital samples input from the host RF digitizer to form down-link composite simulcast-plus-uniquely-offset-beacon-pilot CDMA samples; and a framer/serializer configured to distribute each composite simulcast-plus-uniquely-offset-beacon-pilot CDMA sample to an associated remote antenna node in the distributed antenna system; a delay buffer communicatively coupled to input samples output from a beacon pilot generator and to output digitally delayed CDMA-digital-beacon-pilot samples having the different pseudo-noise offsets, the beacon pilot generator configured to output digital baseband samples; and a digital up-convertor to input the digital baseband samples and to output digital intermediate frequency samples to the delay buffer.
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18. A host unit to feed remote antenna nodes in a distributed antenna system with simulcast traffic and non-simulcast beacons, the host unit comprising:
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a host radio frequency (RF) digitizer to input code division multiple access (CDMA) base station signals for simulcast CDMA-traffic-bearing channels and to output digital samples; a summing circuit to add CDMA-digital-beacon-pilot samples having different pseudo-noise offsets to the digital samples input from the host RF digitizer to form down-link composite simulcast-plus-uniquely-offset-beacon-pilot CDMA samples; and a framer/serializer configured to distribute each composite simulcast-plus-uniquely-offset-beacon-pilot CDMA sample to an associated remote antenna node in the distributed antenna system, wherein the summing circuit inputs the CDMA-digital-beacon-pilot samples having the different pseudo-noise offsets from an external beacon pilot generator, the external beacon pilot generator including; a baseband beacon pilot generator to output digital baseband samples; a digital up-converter to input the digital baseband samples from the baseband beacon pilot generator and to output digital intermediate frequency (IF) samples to a delay buffer; and the delay buffer communicatively coupled to input the digital IF samples output from the digital up-converter and configured to output the CDMA-digital-beacon-pilot samples having the different pseudo-noise offsets to the summing circuit.
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Specification