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LNA
Figure 3-3 shows the logical structure of the RRU3606.
Figure 3-3 Logical structure of the RRU3606
3.2.1 High-Speed Interface Module
The functions of a high-speed interface module are:
Receiving downlink baseband data from an upper-level BBU3900
Sending uplink baseband data to an upper-level BBU3900 and forwarding data of
cascaded RRU3606s
3.2.2 RTRX
The RTRX consists of two uplink reception channels and one downlink transmission
channel. Each channel supports four carriers.
3.2.3 PA
The PA amplifies small-power RF signals sent from the RTRX.
3.2.4 Duplexer
The functions of a duplexer are:
Multiplexing the RF channel so that the transmitted and received signals share
one antenna channel
Filtering received and transmitted signals
3.2.5 LNA
The LNA amplifies the received signals of the antenna.
Commercial in Confidence
RRU3606 CDMA Base Station Product Description
Page 13 of 43
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