User Guide for FibeAir® IP-20 All-Outdoor Products, CeraOS 10.5
Page 157 of 825
Ceragon Proprietary and Confidential
3.6
Configuring XPIC
Note
:
This option is only relevant for IP-20C and IP-20C-HP units.
This section includes:
•
•
Configuring the Radio Carriers
•
•
Performing Antenna Alignment for XPIC
3.6.1
XPIC Overview
Cross Polarization Interference Canceller (XPIC) is a feature that enables two radio
carriers to use the same frequency with a polarity separation between them.
Since they will never be completely orthogonal, some signal cancelation is
required.
In addition, XPIC includes an automatic recovery mechanism that ensures that if
one carrier fails, or a false signal is received, the mate carrier will not be affected.
This mechanism also ensures that both carriers will be operational, after the
failure is cleared.
To configure and enable XPIC, first configure the carriers and then perform
antenna alignment, as described below.
For 2+2 XPIC using an external switch operating in LAG mode, Mate Management
Access enables users to manage both units via in-band management. For
instructions, see
Mate Management Access (IP Forwarding) (CLI)
on page 448.
3.6.2
Configuring the Radio Carriers
To configure the radio carriers:
1 Configure the carriers on both ends of the link to the desired frequency
channel. Both carriers must be configured to the same frequency channel.
2 Assign an XPIC (CCDP operational mode) support-enabled script to the carriers
on both ends of the link. Each carrier must be assigned the same script. For
details, refer to
Configuring the Radio (MRMC) Script(s)
Note:
XPIC support is indicated by an X in the script name. For example,
mdN_A2828X_111_1205 is an XPIC-enabled script.
mdN_A2828N_130_100 is not an XPIC-enabled script. For a list of XPIC
support-enabled scripts, refer to the most recent Release Notes.
3 In the XPIC page, create an XPIC group that consists of the two RMCs that will
be in the XPIC group. See
3.6.3
Creating an XPIC Group
To create an XPIC group:
1 Select
Radio > Groups > XPIC
. The XPIC page opens.