Distributed antenna system

DAS antenna elevations are generally at or below the clutter level, and node installations are compact.

DAS is often used in scenarios where alternate technologies are infeasible due to terrain or zoning challenges.

This artificially increases delay spread in areas of overlapped coverage, permitting quality improvements via time diversity.

[citation needed] Using a distributed antenna system to create an area of wireless coverage, it is possible to use this technique to propagate indoor WiFi for commercial uses.

All high-rise buildings in New York must have a dedicated wireless two-way communications system for fire department use.

[10] The Industry designs and builds DAS systems in line with the joint operator document known as the Multi Carrier Forum (MCF).

For example a 'Passive DAS" globally often refers to an offair repeater based system, whereas in Australia that is not the case.

A diagram contrasting a single antenna configuration with DAS
A typical DAS node for the Videotron 3G network in Montreal, Quebec
DAS deployed by Transit Wireless in New York City Subway to provide WiFi, cellular voice and data coverage. The RF node with three antennas was at the platform and another antenna near the stairs on the far side.