US 8,270,387 B2 · Systems and methods for improved digital RF transport in distributed antenna systems

Abstract

Systems and methods for improved digital RF transport in a DAS are provided. In one embodiment, a transceiver comprises: a receive path circuit including an RF reception interface coupled to an ADC, the ADC receiving a down-converted analog RF spectrum from the RF reception interface and producing a digitized RF spectrum at an input sampling rate; a logic device receiving the digitized RF spectrum and producing a first set of baseband data samples at a first sampling rate, corresponding to a first spectral region of the analog RF spectrum and a second set of baseband data samples at a second sampling rate, corresponding to a second spectral region of the analog RF spectrum. The logic device maps the first set and second sets of baseband data samples to a respective first set and second set of timeslots of a serial data stream transport frame.

Claims27

Dependent claims

A digital-analog radio transceiver for providing digital transport of signals on a radio-frequency (RF) distributed antennal system, the transceiver comprising:

a receive path circuit including an RF reception interface coupled to an analog-to-digital converter, the analog-to-digital converter receiving a down-converted analog RF spectrum from the RF reception interface and producing a digitized RF spectrum at an input sampling rate;
a logic device coupled to the receive path circuit and receiving the digitized RF spectrum at the input sampling rate, the logic device producing a first set of baseband data samples at a first sampling rate, the first set of baseband data samples corresponding to a first spectral region of the analog RF spectrum, the logic device further producing a second set of baseband data samples at a second sampling rate, the second set of baseband data samples corresponding to a second spectral region of the analog RF spectrum;
wherein the logic device maps the first set of baseband data samples at the first sampling rate to a first set of timeslots of a serial data stream transport frame and maps the second set of baseband data samples at the second sampling rate to a second set of timeslots of the transport frame.

A digital-analog radio transceiver for providing digital transport of signals on a radio-frequency (RF) distributed antennal system, the transceiver comprising:

a transmission path circuit including an RF transmission interface coupled to an digital-to-analog converter;
a logic device further coupled to the transmission path circuit, the logic device receiving an input transport frame having a plurality of timeslots, wherein a first set of the plurality of timeslots includes a first set of baseband data samples at first sampling rate, the third set of baseband data samples corresponding to a first spectral region of an analog RF spectrum, and wherein a second set of the plurality of timeslots includes a second set of baseband data samples at a second sampling rate, the second set of baseband data samples corresponding to a second spectral region of the analog RF spectrum;
wherein the logic device up-converts the first set of baseband data samples at the first sampling rate to a first set of RF data samples corresponding to the first spectral region at an output sampling rate;
wherein the logic device up-converts the second set of baseband data samples at the second sampling rate to second set of RF data samples corresponding to the second spectral region at the output sampling rate;
wherein the logic device sums the first set of RF data samples with the second set of RF data samples to produce a set of output data samples at the output sampling rate;
wherein the digital-to-analog converter receives the output data samples at the output sampling rate and generates an output analog signal from the output data samples;
wherein the RF transmission interface receives the output analog signal and up-converts the output analog signal into an analog RF signal within the analog RF spectrum.

4 more elements

A method for providing digital transport of signals on a radio-frequency (RF) distributed antennal system, the method comprising:

receiving an input transport signal comprising a transport frame having a plurality of timeslots;
parsing the input transport signal into at least a first set of baseband signal and a second set of baseband signals based on a timeslot configuration of the input transport signal;
upconverting the first set of baseband signals from a first sampling rate to an output sampling rate;
in parallel with upconverting the first set of baseband signals, upconverting the second set of baseband signals from a second sampling rate to the output sampling rate;
summing the upconverted first set of baseband signals with the upconverted second set of baseband signals to produce a set of output data samples;
and
converting the set of output data samples to an analog RF signal through a digital-to-analog converter.

4 more elements

Dependencies are inferred from the claim text.

Systems and methods for improved digital RF transport in distributed antenna systems

Life of this patent

Systems and methods for improved digital RF transport in distributed antenna systems

Life of this patent

Abstract

Claims27