Digital Signal Processing Reference
In-Depth Information
Figure 20.4
SNR versus the iteration cycle numbers characterizing application of the three
compared algorithms for signal waveform reconstruction
their performance characteristics are different. To gain a first impression of their
comparative qualities, a multitone test signal was digitized and its waveform was
reconstructed in the presence of noise by applying all three algorithms. Diagrams
of the SNR versus the iteration cycle numbers characterizing application of
the three compared algorithms for signal waveform reconstruction are shown
Figure 20.4. It can be seen from them that the waveform reconstruction errors,
in the case where the reconstruction is performed on the basis of the SECOEX
algorithm, decrease from one iterative cycle to the next relatively slowly and the
iterative process is long. The second algorithm, the iterative algorithm, provides
better results. However, the best results are obtained in the case of the third al-
gorithm based on iteratively adapting the waveform reconstruction process to
the sampling irregularities. When a signal waveform is reconstructed in accor-
dance with this, suppression of the reconstruction error to their minimal value is
achieved in a reduced number of iteration cycles.
20.3
Dedicated Services of the Embedded DASP Systems
According to the definition, embedded systems provide dedicated services to
embedding systems. The services that should be offered by the embedded DASP
