3. TECHNICAL BRIEF
3. TECHNICAL BRIEF
3.1 General Description
The U300 supports UMTS-2100 DS-WCDMA, EGSM-900, DCS-1800, and PCS-1900.
All receivers and the UMTS transmitter use the radioOne
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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 upconversion followed by an offset phase-locked loop
that translates the GMSKmodulated signal to RF.
U300 high-level RF functional block diagram
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QUALCOMM's branded chipset that implements a Zero-IF radio architecture.
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