Digital Signal Processing Reference
In-Depth Information
(
a
)
(
b
)
(
c
)
(
d
)
FIGURE 7.20.
CCS plots illustrating the adaptation process of an adaptive filter: (
a
) weights
set initially as a 3-kHz bandpass filter; (
b
) weights starting to converge to a 2-kHz filter;
(
c
) weights almost converged to 2 kHz with the 3-kHz filter reduced; (
d
) adaptation com-
pleted with convergence to the 2-kHz bandpass filter.
gradually phases out. As the adaptation process takes place, one can observe at some
time the two bandpass filters. You may wish to increase slightly the rate of adapta-
tion (
beta
)
.
The adaptation process is illustrated with the CCS plots in Figure 7.20. Figure
7.21 illustrates the real-time adaptation process using an HP dynamic signal
analyzer.
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