Radwin TV White Space, Installation Manual

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TV White Space Installation Guide Release 1.0 B ‐ 3
Scope of this Appendix
B.2.3 Single at One Site, Dual Antennas at the Other
In this mode one of the sites uses the ODU with a single antenna while the other site uses the
ODU with a dual antenna.
The advantages in this mode in comparison to using a single antenna in both sites are
doubled total Tx Power and additional polarization and/or space diversity (depending on the
polarization of installed antennas).
The air rates used in this mode are same as when using single antennas in both sites.
Table B ‐ 1 summarizes the situation: (SM =Spatial Multiplexing)
Site A and B may be HBS or SU.
B.3 Considerations for Changing Antenna
Parameters
Let:
max Available Tx Power denote the maximum Tx Power practically available from an ODU. (It
appears as Tx Power per Radio.)
maxRegEIRP denote the maximum EIRP available by regulation. It will be determined by three
factors:
• per band/regulation
• per channel bandwidth
• antenna gain
maxRegTxPower denote the maximum regulatory Tx Power for the equipment, also having
regard the above three points.
Table B ‐ 1: Spatial Multiplexing ‐ Diversity settings
Number of
Antennas
Mode
Max Full
Duplex
Capacity
Site A Site B Site A Site B
2 2
Spatial
Multiplexing
Spatial
Multiplexing
50 Mbps
Diversity Diversity 25 Mbps
2 1
Diversity Single 25 Mbps
1 2
Single
Diversity
25 Mbps
1 1
Single Single 25 Mbps
FOR REGULATORY USES ONLY