User's Manual

Mobile WiMAX RAS SPI-2213 System Description/Ed.02

y Monitoring Port

Operators can monitor the information for an RRH using its debug port.

Support of MIMO

The SPI-2213 supports MIMO through the 2Tx/2Rx RF path of the RRH-2 (RRH-

2LB/RRH-2UB). There are the following methods in MIMO.

y Downlink

− Space Time Coding (STC): method for raising reliability of link

− Spatial Multiplexing (SM): method for raising data transmission rate

y Uplink

Collaborative SM (CSM): method for doubling the frequency efficiency

Support of Cyclic Delay Diversity (CDD)

The CDD sends the data stream that is the same as a data stream repeatedly using

frequency diversity. Therefore, the air performance of the Mobile WiMAX system can be

improved using CDD.

Figure 1.3 FFT Spectrum Plot of CDD

Support of Frequency Reuse Pattern (FRP)

The SPI-2213 supports FRP N=1 that provides the service to 3-sector by using a carrier and

FRP N=3 that provides the service to 3-sector by using different carriers.

A service provider can efficiently operate its own frequency resources by using the FRP

function.

Providing or not the System Feature and Schedule to Provide the System

Feature

For the providing or not the system feature and schedule to provide the features

described in this system description, see separate document.

IFFT

Cyclic Prefix

Cyclic

Delay

Data A

Data A (Delayed)

CDD data

Freq.