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That's it for dsp029

That's about it for the program named Dsp029 . If you understand this program, you are well ahead of the game. The overall structurefor the programs named Dsp028 and Dsp030 are very similar to the structure for Dsp029 . The big difference is the manner in which they populate the array objects with the data that is to beplotted. Instead of simply plotting sinusoids, they perform spectral analysis on sinusoids and provide the results of the spectral analysis to be plotted.

Using the interface named graphintfc01

As you learned earlier, this is a very simple interface. However, because the class named Dsp029 implements the interface, the interface definition file must be in the same directory as the source file for Dsp029 in order to successfully compile Dsp029 . Therefore, I have provided a complete listing of GraphIntfc01 in Listing 17 near the end of the module.

The program named Graph06

A complete listing of the program named Graph06 is provided in Listing 18 near the end of the module. This is simply a newer version of graphics display programs that I explained in the earlier module titled Plotting Engineering and Scientific Data using Java . Therefore, I won't repeat that explanation here. The comments at the beginning and spreadthroughout the program provide considerable information about it.

Operational aspects of graph06

However, an explanation of the operational aspects of the program will be useful here. You can use this program to display the output produced by Dsp029 by entering the following at the command line prompt:

java Graph06 Dsp029

As you saw in Figure 3 and other previous figures, this program provides the following text fields for user input, along with a button labeled Graph :

  • xMin = minimum x-axis value
  • xMax = maximum x-axis value
  • yMin = minimum y-axis value
  • yMax = maximum y-axis value
  • xTicInt = tic interval on x-axis
  • yTicInt = tic interval on y-axis
  • xCalcInc = calculation interval

These text fields make it possible for you to adjust the plotting parameters and to re-plot the graphs as many times as needed.

You can modify any of these parameters and then click the Graph button to cause the five functions to be re-plotted according to the newplotting parameters.

Spectral Analysis using a DFT Algorithm

Now that you have a good idea where we are heading, it's time to start doing some spectral analysis.

Let's begin by looking at some output obtained by performing a spectral analysis on the same five sinusoids shown in Figure 3 . The parameters used to perform this spectral analysis are shown in Figure 8 . (I will explain each of these parameters as we go along.)

Figure 8. Parameters for spectral analysis.
Data length: 400 Sample for zero time: 0Lower frequency bound: 0.0 Upper frequency bound: 1.0Number spectra: 5 Frequencies0.03125 0.06250.125 0.250.5 Amplitudes90.0 90.090.0 90.090.0

Although more parameters are required to perform spectral analysis than are required to simply generate and plot the sinusoids, the number of sinusoids, thefrequencies of the sinusoids, and the amplitudes of the sinusoids in Figure 8 are the same as in Figure 2 .

Questions & Answers

How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
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Damian Reply
what king of growth are you checking .?
Renato
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Stoney Reply
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Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
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Adin
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Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
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Akash Reply
it is a goid question and i want to know the answer as well
Maciej
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Abigail
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Anassong
How can I make nanorobot?
Lily
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
how can I make nanorobot?
Lily
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Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
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Source:  OpenStax, Digital signal processing - dsp. OpenStax CNX. Jan 06, 2016 Download for free at https://legacy.cnx.org/content/col11642/1.38
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