Digital baseband transport in telecommunications distribution systems
First Claim
1. A telecommunications system, comprising:
- a head end unit configured for communicating, with remotely located units, channelized digital baseband signals that include call information for wireless communication, the head end unit including;
channelizer circuitry configured for extracting, per channel, the channelized digital baseband signals using channel filters and digital down-converters; and
transport circuitry configured for formatting the channelized digital baseband signals for transport together using a transport schedule unit configured for packetizing and packet scheduling the channelized digital baseband signals, wherein the transport circuitry includes;
transport channel processors configured for performing decimation, filtering, and signal gain changes on the channelized digital baseband signals; and
a transport device including the transport schedule unit and a baseband signal extractor, the baseband signal extractor being configured for extracting received channelized digital baseband signals from a transport physical interface device.
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Abstract
A telecommunications system is provided that includes a unit for communicating channelized digital baseband signals with remotely located units. The channelized digital baseband signals include call information for wireless communication. The unit includes a channelizer section and a transport section. The channelizer section can extract, per channel, the channelized digital baseband signals using channel filters and digital down-converters. The transport section can format the channelized digital baseband signals for transport together using a transport schedule unit for packetizing and packet scheduling the channelized digital baseband signals. A signal processing subsystem can control a gain of uplink digital baseband signals, independently, that are received from the remotely located units prior to summing the uplink digital baseband signals.
180 Citations
18 Claims
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1. A telecommunications system, comprising:
a head end unit configured for communicating, with remotely located units, channelized digital baseband signals that include call information for wireless communication, the head end unit including; channelizer circuitry configured for extracting, per channel, the channelized digital baseband signals using channel filters and digital down-converters; and transport circuitry configured for formatting the channelized digital baseband signals for transport together using a transport schedule unit configured for packetizing and packet scheduling the channelized digital baseband signals, wherein the transport circuitry includes; transport channel processors configured for performing decimation, filtering, and signal gain changes on the channelized digital baseband signals; and a transport device including the transport schedule unit and a baseband signal extractor, the baseband signal extractor being configured for extracting received channelized digital baseband signals from a transport physical interface device. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A distributed antenna system comprising:
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at least two remote units configured for wirelessly transmitting signals in a coverage area; a head end unit configured for communicating, with the at least two remote units, channelized digital baseband signals that include call information for wireless communication; channelizer circuitry configured for extracting, per channel, the channelized digital baseband signals using channel filters and digital down-converters; and transport circuitry configured for formatting the channelized digital baseband signals for transport together using a transport schedule unit configured for packetizing and packet scheduling the channelized digital baseband signals, wherein the transport circuitry includes; transport channel processors configured for performing decimation, filtering, and signal gain changes on the channelized digital baseband signals; and a transport device including the transport schedule unit and a baseband signal extractor, the baseband signal extractor being configured for extracting received channelized digital baseband signals from a transport physical interface device. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A telecommunications system, comprising:
a head end unit configured for communicating, with remotely located units, channelized digital baseband signals that include call information for wireless communication, the head end unit including; transport circuitry configured for formatting the channelized digital baseband signals for transport together using a transport schedule unit configured for packetizing and packet scheduling the channelized digital baseband signals; and signal processing circuitry configured for controlling a gain of each of a plurality of uplink digital baseband signals received from the remotely located units independently prior to summing the plurality of uplink digital baseband signals, wherein the signal processing circuitry includes; a variable gain block associated with a signal envelope peak detector and configured for scaling summed uplink digital baseband signals; a shifter device configured for shifting the summed uplink digital baseband signals; and a saturate device configured for clipping the summed uplink digital baseband signals at a level selected by the shifter device. - View Dependent Claims (18)
Specification