Digital Standard 3GPP W-CDMA (FDD)
SMIQ
1125.5555.03
E-9
2.192
2.14.2.4 WCDMA/3GPP Menu – Displaying Constellation Diagrams
A constellation diagram can be calculated and displayed from the unfiltered I/Q samples (menu item
CONSTELLATION).
Fig. 2-114
DIGITAL STD - WCDMA/3GPP – CONSTELLATION menu
In addition to the code domain display (see section 2.14.2.9) and the CCDF display (see section
2.14.2.3) the constellation diagram is the most important display for a W-CDMA signal. In addition to
channel powers, the effect of data sources etc and also the spreading scheme can be read off as a
function of the type of channel. For further information on W-CDMA constellation diagrams see sections
2.14.3.1 and 2.14.3.3. The complete waveform, i.e. the sum for all (max. 4) stations is used to calculate
the constellation diagram.
