LPMP, UBBP, WBBP, LBBP >>> BBU boards

LPMP:

The LTE PIM mitigation processing card (LPMP) can be installed in a BBU3900 or BBU3910. PIM is short for passive intermodulation.

The LPMP performs the following functions:

• Suppresses passive intermodulation interference among LTE carriers.

• Provides CPRI ports for communication between the BBU and RF modules.

Here's a working principle of an LPMP;

UBBP:

The universal baseband processing unit (UBBP).

The UBBP performs the following functions:

• Provides CPRI ports for communication with RF modules.

• Processes uplink and downlink baseband signals.

• Supports the multiplex of baseband resources among different modes, thereby implementing multimode concurrency.

Here's a working principle:

WBBP:

A WCDMA baseband processing unit (WBBP) is a board processing WCDMA baseband signals. A WBBP can be installed in a BBU3900.

• A WBBP processes uplink and downlink baseband signals.

• A WBBP provides CPRI ports for communication with RF modules.

• A WBBPd supports interference cancellation (IC) within the board.

• When the CPRI cables connect RF modules carrying corresponding cells to a WBBPd, the WBBPd installed in slot 2 or 3 supports IC of uplink data.

• A WBBPf installed in slot 2 or 3 supports BBU interconnection.

Here's a working principle:

LBBP:

An LTE baseband processing unit (LBBP) is a board processing LTE baseband signals. An LBBP can be installed in a BBU3900.

An LBBP performs the following functions:

• Provides CPRI ports for communication between the BBU and RF modules.

• Processes uplink and downlink baseband signals.

Here's the working principle:

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