User's Manual

Table Of Contents

Ver.

CHAPTER 4. Message Flow

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4.2 Data Traffic Flow

Sending Path

The user data received from the EPC passes through the network interface module and is

transmitted through the Ethernet switch to the L7IA of Indoor Pico Cell. The transmitted

user data goes through baseband-level digital processing, and transmitted to the transceiver

part. The transceiver up-converts the wideband baseband signal to the RF band, and the

converted signal is transmitted to the antenna through the power amplifier and filter.

Receiving Path

The RF signal received by the antenna passes through the L7IA’s filter and its low noise is

amplified by the LNA. This signal is converted to the data signal of baseband after the RF

down-conversion in the transceiver of the L7IA. The data which passed through the SC-

FDMA signaling process in the modem is converted to the Gigabit Ethernet frame and

transmitted to the EPC through GE.

Figure 22. Data Traffic Flow

Main

Processor

Modem

Digital

EPC

Transceiver

PAM

Filter/LNA

Network

D/A

A/D

Conversion

Down

Conversion

Power

Amp

LNA

Filter

Indoor Pico Cell

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