By Nasser Kehtarnavaz
LabVIEW (Laboratory digital Instrumentation Engineering Workbench) constructed through nationwide tools is a graphical programming atmosphere. Its ease of use permits engineers and scholars to streamline the construction of code visually, leaving time ordinarily spent on debugging for precise comprehension of DSP. This booklet is ideal for working towards engineers, in addition to and software program technical managers who're acquainted with DSP and are fascinated with system-level layout. With this article, authors Kehtarnavaz and Kim have additionally supplied a worthwhile source for college kids in traditional engineering classes. The built-in lab workouts create an interactive event which helps improvement of the hands-on talents crucial for studying to navigate the LabVIEW application. electronic sign Processing System-Level layout utilizing LabVIEW is a entire device that might tremendously speed up the DSP studying approach. Its thorough exam of LabVIEW leaves absolute confidence unanswered. LabVIEW is this system that would demystify DSP and this is often the booklet that may enable you to grasp it. * A graphical programming method (LabVIEW) to DSP system-level layout * DSP implementation of acceptable parts of a LabVIEW designed approach * offering system-level, hands-on experiments for DSP lab or undertaking classes
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Extra info for Digital Signal Processing System-Level Design Using LabVIEW
Position the While Loop to enclose all the Express VIs and the graph. Now the VI is ready to be run. 33 Lab 2 Figure 2-34: FP of signal generation and ampliﬁcation system. Run the VI and observe the Waveform Graph. The output should appear as shown in Figure 2-34. To extend the plot to the right end of the plotting area, rightclick on the Waveform Graph and choose X Scale, then uncheck Loose Fit from the shortcut menu. The graph shown in Figure 2-35 should appear. Figure 2-35: Plot with Loose Fit.
This sets up an indicator of scalar data type outside the loop structure on the BD. Next, create a third indicator on the Number (0 to 1) terminal of the Random Number (0-1) function located in the For Loop to observe the values coming out. To do this, right-click on the output terminal or on the wire connected to this terminal and choose Create → Indicator from the shortcut menu. Place a Time Delay Express VI (Functions → Execution Contol → Time Delay) to delay the execution in order to have enough time to observe a current value.
That is why, in practice, an approximation of a sinc function is used. Figure 3-11 shows an approximation of a sinc function by a pulse, which is easy to realize in electronic circuitry. In fact, the well-known sample and hold circuit performs this approximation . 4 −5 −4 −3 −2 −1 0 1 2 3 4 5 Figure 3-11: Approximation of a sinc function by a pulse.