<< Chapter < Page
  Digital signal processing - dsp     Page 8 / 24
Chapter >> Page >

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

Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
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
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
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
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
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
hi
Loga
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get the best Algebra and trigonometry course in your pocket!





Source:  OpenStax, Digital signal processing - dsp. OpenStax CNX. Jan 06, 2016 Download for free at https://legacy.cnx.org/content/col11642/1.38
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Digital signal processing - dsp' conversation and receive update notifications?

Ask