TAILIEUCHUNG - Distributed Antenna Systems

The Digivance® product line with FLEX technology has many features and functions made possible by its use of a digital platform. This white paper describes the distinct advantages of Digivance when contrasted with legacy analog fiber repeaters. Topics covered include: Benefits of Digital Over Analog Fiber Backhauls; Benefits of Digitizing RF signals; Interference Protection; and Future-Proofing. | od J CL Distributed Antenna Systems Advantages of Digital Transport in the Design Operation and Growth of Distributed Antenna Systems DAS Advantages of Digital Transport in the Design Operation and Growth of Distributed Antenna Systems DAS Introduction The Digivance product line with FLEX technology has many features and functions made possible by its use of a digital platform. This white paper describes the distinct advantages of Digivance when contrasted with legacy analog fiber repeaters. Topics covered include Benefits of Digital Over Analog Fiber Backhauls Benefits of Digitizing RF signals Interference Protection and Future-Proofing. Digivance NXD and CXD feature the innovative FLEX technology that offers the option of one two three or four 15 MHz bands in a single cabinet. This technology also provides simulcasting -- the option of spreading the coverage of a BTS sector across two or more transmit receive locations. FLEX technology allows multiple simulcast arrangements for different bands or different RF technologies. In addition this technology offers operators increased flexibility in meeting fluctuating capacity demands. By allowing service providers to change simulcast patterns through the use of remotely controlled digital cross connect switches FLEX technology can reallocate capacity and reduce BTS costs. This technology can also be integrated with Software Defined Radio SDR to enable wireless networks of the future. Benefits of Digital Fiber The Digivance system uses digital fiber for connecting the hub to the remote units. Digital fiber has many advantages over analog including greater band-to-band isolation consistent RF performance with automated delay management and integrated IP connectivity to all RANs and accurate fiber link fault detection and isolation. Band-to-Band Isolation The multiple RF bands transported between the hub and remote unit are digitally time-multiplexed onto the fiber backbone. Therefore once the signals are in the digital .

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