Analog distributed antenna systems (DASS) supporting distribution of digital communications signals interfaced from a digital signal source and analog radio frequency (RF) communications signals
First Claim
1. An analog wireless communications system configured to support analog radio frequency (RF) communications signals and digital communications signals distribution, comprising:
- a plurality of remote units;
a head-end equipment (HEE), comprising;
at least one RF signal interface communicatively coupled to at least one RF signal source;
at least one digital signal interface communicatively coupled to at least one digital signal source;
a downlink communications signal interface coupled to the at least one RF signal interface and the at least one digital signal interface;
an uplink communications signal interface coupled to the at least one RF signal interface and the at least one digital signal interface; and
a HEE front end interface coupled to the downlink communications signal interface and the uplink communications signal interface, the HEE front end interface comprising a plurality of optical interface modules (OIMs);
at least one downlink communications medium coupled to the HEE front end interface and the plurality of remote units; and
at least one uplink communications medium coupled to the HEE front end interface and the plurality of remote units, wherein;
the at least one RF signal source is at least one base transceiver station (BTS);
the at least one digital signal source is at least one baseband unit (BBU);
the at least one RF signal interface is at least one radio interface module (RIM);
the at least one digital signal interface is at least one baseband interface module (BIM); and
the at least one BIM is combined with the at least one BBU located outside the HEE.
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Accused Products
Abstract
Embodiments disclosed in the detailed description include analog distributed antenna system (DAS) supporting distribution of digital communications signals interfaced from a digital signal source and analog radio frequency (RF) communications signals. Analog RF communications signals received from analog RF signal sources are distributed in the analog DAS without being digitized. The analog DAS is also configured to interface with digital signal sources and compatibly distribute digital communications signals. Hence, a digital signal interface in head-end equipment (HEE) is configured to convert downlink digital communications signals to downlink analog RF communications signals for distribution to a plurality of remote units. The digital signal interface is also configured to convert uplink analog RF communications signals to uplink digital communications signals for distribution to the digital signal source(s). By providing the digital signal interface in the HEE, the analog DAS can be configured to distribute digital communications signals to analog DAS components.
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Citations
13 Claims
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1. An analog wireless communications system configured to support analog radio frequency (RF) communications signals and digital communications signals distribution, comprising:
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a plurality of remote units; a head-end equipment (HEE), comprising; at least one RF signal interface communicatively coupled to at least one RF signal source; at least one digital signal interface communicatively coupled to at least one digital signal source; a downlink communications signal interface coupled to the at least one RF signal interface and the at least one digital signal interface; an uplink communications signal interface coupled to the at least one RF signal interface and the at least one digital signal interface; and a HEE front end interface coupled to the downlink communications signal interface and the uplink communications signal interface, the HEE front end interface comprising a plurality of optical interface modules (OIMs); at least one downlink communications medium coupled to the HEE front end interface and the plurality of remote units; and at least one uplink communications medium coupled to the HEE front end interface and the plurality of remote units, wherein; the at least one RF signal source is at least one base transceiver station (BTS); the at least one digital signal source is at least one baseband unit (BBU); the at least one RF signal interface is at least one radio interface module (RIM); the at least one digital signal interface is at least one baseband interface module (BIM); and the at least one BIM is combined with the at least one BBU located outside the HEE. - View Dependent Claims (2, 3, 4)
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5. An analog wireless communications system configured to support analog radio frequency (RF) communications signals and digital communications signals distribution, comprising:
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a plurality of remote units; a head-end equipment (HEE), comprising; at least one RF signal interface communicatively coupled to at least one RF signal source; at least one digital signal interface communicatively coupled to at least one digital signal source; a downlink communications signal interface coupled to the at least one RF signal interface and the at least one digital signal interface; an uplink communications signal interface coupled to the at least one RF signal interface and the at least one digital signal interface; and a HEE front end interface coupled to the downlink communications signal interface and the uplink communications signal interface, the HEE front end interface comprising a plurality of optical interface modules (OIMs); at least one downlink communications medium coupled to the HEE front end interface and the plurality of remote units; and at least one uplink communications medium coupled to the HEE front end interface and the plurality of remote units, wherein; the at least one RF signal source is at least one base transceiver station (BTS); the at least one digital signal source is at least one baseband unit (BBU); the at least one RF signal interface is at least one radio interface module (RIM); and the at least one digital signal interface is at least one baseband interface module (BIM), and wherein the at least one BIM comprises; a digital data processing circuit; and a downlink signal processing path, comprising; a digital-to-analog converter (DAC) coupled to the digital data processing circuit; a first downlink filter coupled to the DAC; a downlink modulator coupled to the first downlink filter; a first local oscillator coupled to the downlink modulator; a second downlink filter coupled to the downlink modulator; and a downlink variable gain amplifier coupled to the second downlink filter and the downlink communications signal interface. - View Dependent Claims (6, 7, 8, 9)
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10. An analog wireless communications system configured to support analog radio frequency (RF) communications signals and digital communications signals distribution, comprising:
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a plurality of remote units; a head-end equipment (HEE), comprising; at least one RF signal interface communicatively coupled to at least one RF signal source; at least one digital signal interface communicatively coupled to at least one digital signal source; a downlink communications signal interface coupled to the at least one RF signal interface and the at least one digital signal interface; an uplink communications signal interface coupled to the at least one RF signal interface and the at least one digital signal interface; and a HEE front end interface coupled to the downlink communications signal interface and the uplink communications signal interface, the HEE front end interface comprising a plurality of optical interface modules (OIMs); at least one downlink communications medium coupled to the HEE front end interface and the plurality of remote units; and at least one uplink communications medium coupled to the HEE front end interface and the plurality of remote units, wherein; the at least one RF signal source is at least one base transceiver station (BTS); the at least one digital signal source is at least one baseband unit (BBU), the at least one RF signal interface is at least one radio interface module (RIM), and the at least one digital signal interface is at least one baseband interface module (BIM), and wherein the at least one BIM comprises; a digital data processing circuit; and a downlink signal processing path, comprising; a downlink quadrature (Q) signal digital-to-analog converter (DAC) coupled to the digital data processing circuit; a downlink in-phase (I) signal DAC coupled to the digital data processing circuit; a first downlink Q signal filter coupled to the downlink Q signal DAC; a first downlink I signal filter coupled to the downlink I signal DAC; a downlink quadrature modulator coupled to the downlink Q signal DAC and the downlink I signal DAC; a first local oscillator coupled to the downlink quadrature modulator; a second downlink filter coupled to the downlink quadrature modulator; and a downlink variable gain amplifier coupled to the second downlink filter and the downlink communications signal interface. - View Dependent Claims (11, 12, 13)
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Specification