User's Manual

Chapter 3 - Operation and Administration Using the CLI Managing BSs
4Motion 567 System Manual
3.8.16.2.8 Configuring Airframe MIMO Parameters
The DL MIMO feature provides a TX diversity gain or, when physical conditions
allow, data rate gain (double rate).
The gain is allowed thanks to two transmitting antennas at the BS side, two
receiving antennas at the MS side, and encoding/decoding capabilities of both MS
and BS.
TX diversity gain is achieved when MS works at matrix A/STC, space time coding,
AKA STTD (vertical encoding) mode.
IMPORTANT
When creating a new BS, the Airframe Dynamic Permutation mandatory permbase parameter must
be configured.
Command
Syntax
npu(config-bs-66053-airframe)# dynamicperm [dl-permbase {TRUE |
FALSE} ] [ul-permbase {TRUE | FALSE} ]
Privilege
Level
10
Syntax
Description
Parameter Description Presence Default
Value
Possible
Values
dl-permbase
{TRUE | FALSE}
The Downlink Permutation
Base. If TRUE we use the
same Permutation Base
over all frames (Static). If
FALSE the Permutation
Base changes from frame
to frame (Dynamic).
Optional True
 TRUE
 FALSE
ul-permbase
{TRUE | FALSE}
The Uplink Permutation
Base. If TRUE we use the
same Permutation Base
over all frames. If FALSE
the Permutation Base
changes from frame to
frame.
Optional True
 TRUE
 FALSE
Command
Modes
bs airframe configuration mode