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In this module, I will present and explain the following new programs:

  • Dsp035 - Illustrates the reversible nature of the Fourier transform. This program transforms a real time series into a complexspectrum, and then reproduces the real time series by performing an inverse Fourier transform on the complex spectrum. This is accomplished using a DFTalgorithm.
  • InverseComplexToReal01 - Class that implements an inverse DFT algorithm for transforming a complex spectrum into a real timeseries.
  • Dsp036 - Replicates the behavior of the program named Dsp035 but uses an FFT algorithm instead of a DFT algorithm.
  • InverseComplexToRealFFT01 - Class that implements an inverse FFT algorithm for transforming a complex spectrum into a real timeseries.
  • Dsp037 - Illustrates filtering in the frequency domain. Uses an FFT algorithm to transform a time-domain impulse into the frequencydomain. Modifies the complex spectrum, eliminating energy within a specific band of frequencies. Uses an inverse FFT algorithm to produce the filteredversion of the impulse in the time domain.

In addition, I will use the following programs that I explained in the module titled Spectrum Analysis using Java, Sampling Frequency, Folding Frequency, and the FFT Algorithm and other previous modules.

  • ForwardRealToComplex01 - Class that implements a forward DFT algorithm for transforming a real time series into a complexspectrum.
  • ForwardRealToComplexFFT01 - Class that implements a forward FFT algorithm for transforming a real time series into a complexspectrum.
  • Graph03 - Used to display various types of data. (The concepts were explained in an earlier module.)
  • Graph06 - Also used to display various types of data in a somewhat different format. (The concepts were also explained in an earliermodule.)
  • GraphIntfc01 - An interface that is required by Graph03 and Graph06 .

Discussion and sample code

Description of the program named Dsp035

The program named Dsp035 illustrates forward and inverse Fourier transforms using DFT algorithms.

The program performs spectral analysis on a time series consisting of pulses and a sinusoid. Then it passes the resulting real and complex parts of thespectrum to an inverse Fourier transform program. This program performs an inverse Fourier transform on the complex spectral data to reconstruct theoriginal time series.

Questions & Answers

How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
scanning tunneling microscope
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
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
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
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.
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
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
How can I make nanorobot?
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
how can I make nanorobot?
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
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.
what is the actual application of fullerenes nowadays?
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.
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.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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