Chapter 3: Configuration Guide
Configuring MIMO and Space Diversity
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Configuring MIMO and Space Diversity
Note
This feature is only relevant for PTP 820C units.
This section describes how to configure MIMO and space diversity, and include the following
topics:
MIMO and Space Diversity Overview
Creating a MIMO or Space Diversity Group
Enabling/Disabling a MIMO or Space Diversity Group
Setting the Role of a MIMO or Space Diversity Group
Deleting a MIMO or Space Diversity Group
MIMO and Space Diversity Overview
Line-of-Sight (LoS) Multiple Input Multiple Output (MIMO) achieves spatial multiplexing by
creating an artificial phase de-correlation by deliberate antenna distance at each site in
deterministic constant distance. At each site in a LoS MIMO configuration, data to be transmitted
over the radio link is split into two bit streams (MIMO 2x2) or four bit streams (MIMO 4x4). These
bit streams are transmitted via two antennas. In MIMO 2x2, the antennas use a single polarization.
In MIMO 4x4, each antenna uses dual polarization. The phase difference caused by the antenna
separation enables the receiver to distinguish between the streams.
PTP 820C supports both MIMO 2x2 and MIMO 4x4. For a full explanation of MIMO support in PTP
820C, refer to the PTP 820C Technical Description.
The same hardware configurations can also be used to implement BBS Space Diversity. PTP 820C
supports 1+0, 2+0 and 2+2 Space Diversity. For a full explanation of Space Diversity support in PTP
820C, refer to the PTP 820C Technical Description.
Note
Only one MIMO or Space Diversity group can be created per PTP 820C unit. All MRMC
scripts that support MIMO also support Space Diversity.