Radwin TV White Space, Руководство по установке

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TV White Space Installation Guide Release 1.0 B ‐ 1
Appendix B: About Antennas
B.1 Scope of this Appendix
This appendix provides some basic information and considerations regarding antennas and
what you need to take into account when configuring antenna parameters.
B.1 Antenna Issues
The choice of Tx Power, antenna gain and cable loss (between the radio and the antenna)
determines the EIRP and is affected by such considerations as radio limitations and regulatory
restrictions.
Before proceeding to antenna installation details, the following background information
should be considered:
B.2 About Single and Dual Antennas
Each RADWIN radio is actually made of two radio transceivers (radios). The radios make use
of algorithms that utilize both Spatial Multiplexing (also called MIMO) and Diversity resulting
in enhanced capacity, range and link availability. The number of antennas (i.e. radios) used is
determined by user configuration and by automatic system decisions, explained below.
B.2.1 Dual Antennas at the HBS and an SU
When using dual antennas at both sites (single bipolar antenna or two mo ‐ unipolar antennas)
you can choose between Spatial Multiplexing Mode and Diversity Mode.
Spatial Multiplexing Mode
Under this mode, the system doubles the link capacity. At the same time, it keeps the same
rate and modulation per radio as was used with single antenna, thus increasing capacity,
range and availability.
FOR REGULATORY USES ONLY