3. TECHNICAL BRIEF
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3.1 General Description
The KU950 supports UMTS-2100 DS-WCDMA, EGSM-900, DCS-1800, and PCS-1900. All receivers
and the UMTS transmitter use the radio One
1
Zero-IF architecture to eliminate intermediate
frequencies, directly converting signals between RF and baseband. The EGSM, DCS1800 and
PCS1900 transmitters use a baseband-to-IF up-conversion followed by an offset phase-locked loop
that translates the GMSKmodulated signal to RF.
1
QUALCOMM’s branded chipset that implements a Zero-IF radio architecture.
3. RF TECHNICAL BRIEF
KU950 high-level RF functional block diagram