User Guide

Figure 107 RF frequency plan

Receiver

Introduction to receiver functionality

The receiver is a linear direct conversion receiver containing LNA, band pass filter and demodulator for each

supported system and band. After the demodulators the signal paths are combined to one common BB path.

WCDMA receiver

In the WCDMA mode, the received signal is fed from the antenna to the SAW duplex filter. From the duplex

filter, the signal goes through a balun to the integrated LNA in the RF ASIC. From the LNA, the signal goes

through a band pass filter. After filtering, the signal goes to the down conversion mixer, which converts the

signal into baseband I and Q signals.

At BB frequency the signal is amplified and fed to a low pass filters.

RM-100

System Module Nokia Customer Care

Issue 2 COMPANY CONFIDENTIAL Page 10 –41