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Only for training and service purposes
3. Technical Brief
3. Technical Brief
3.1 GENERAL DESCRIPTION
The GW620 supports UMTS-900(Band VIII), UMTS-2100(Band I), GSM-850, GSM-900, GSM-1800, and GSM-
1900 based GSM/GPRS/EDGE/UMTS. All receivers and the UMTS transmitter use the radioOne1Zero-IF
architecture to eliminate intermediate frequencies, directly converting signals between RF and baseband.
The quad-band GSM transmitters use a baseband-to-IF up-conversion followed by an offset phase-locked
loop that translates the GMSK-modulated or 8-PSK-modulated signal to RF.
[Figure -1] Block diagram of RF part
1
QUALCOMM’s branded chipset that implements a Zero-IF radio architecture.
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