Chapter 4 173
Basic Digital Operation
Using Finite Impulse Response (FIR) Filters
Using Finite Impulse Response (FIR) Filters
Finite Impulse Response filters can be created and used with both dual arbitrary waveform generated
waveforms and real-time baseband generated waveforms. For this example, the filter is defined within the
CDMA2000 digital communications format, a dual arbitrary waveform generated state.
Creating a User-Defined FIR Filter Using the FIR Table Editor
In this procedure, you use the FIR Values table editor to create and store an 8-symbol, windowed sync
function filter with an oversample ratio of 4.
Accessing the Table Editor
1. Press
Preset.
2. Press
Mode > CDMA > Arb CDMA2000.
3. Press
More (1 of 2) > CDMA2000 Define > Filter > Define User FIR.
4. Press
More (1 of 2) > Delete All Rows.
This will initialize the table editor as shown in Figure 4-29.
Figure 4-29
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