LabVIEW POWER Programming
By Gary W. Johnson (ed)

Chapter 8: Digital Signal Processing

Chapter 8: Digital Signal Processing
Lothar Wenzel
LabVIEW Consultant
Overview
One of the numerous, extremely well laid out pages of LabVIEW relates to signal processing. The LabVIEW Full Development System includes a wide variety of signal theory routines in the Analysis library. In addition, as an open programming environment, LabVIEW is very capable of simulating relatively complex situations. This chapter includes examples that address some of these difficult problems. Most of the themes mentioned here are currently very important and seem to indicate new directions of development within signal theory, which is certainly not a small field.
The LabVIEW DSP Library
The acquisition of measured data is closely connected with digital signal processing. Many of National Instruments? hardware components have integrated signal processing circuits; for example, low-pass filters for filtering out higher-frequency interference signals. In addition, LabVIEW?s Full Development System offers numerous signal theory routines within the Advanced Analysis library (AAL).
The assignment of specific parts of the AAL to mathematics or to signal theory isn?t exactly easy. The transitions are simply too fluid, and, in a sense, signal theory without the use of mathematical aids is inconceivable. However, in some circumstances you can use the breakdown in Table 8.1 as an aid to orientation.
Table 8.1: Organization of the Advanced Analysis Library
Mathematical Libraries of the AAL
Signal Theory Libraries of the AAL
Curve fitting
Signal generation
Probability and statistics
Digital signal processing
Linear algebra
Measurement
Array operations
Filters
Additional numerical methods
Windows
Each of these libraries consists...
Copyright The McGraw-Hill Companies, Inc. 1998 under license agreement with Books24x7
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