LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 15 -
3.1 General Description
The L705iX supports UMTS-800, UMTS-2100. All receivers and the UMTS transmitter use the
radioOne1Zero-IF architecture to eliminate intermediate frequencies, directly converting signals
between RF and baseband.
A generic, high-level functional block diagram of L705iX is shown in Figure 3.1-1. One antenna
collects base station forward link signals and radiates handset reverse link signals. The antenna
connects with receive and transmit paths through a Diplexer.
The UMTS receive paths each include an LNA, an RF band-pass filter, and a downconverter
1
QUALCOMM’s branded chipset that implements a Zero-IF radio architecture.
3. TECHNICAL BRIEF
Fig 3.1 Block diagram of RF part
Z3X-BOX.COM
Содержание L705ix
Страница 185: ...Note Z 3 X B O X C O M ...
Страница 186: ...Note Z 3 X B O X C O M ...