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    Advantages of fir filters

  • Straight forward conceptually and simple to implement
  • Can be implemented with fast convolution
  • Always stable
  • Relatively insensitive to quantization
  • Can have linear phase (same time delay of all frequencies)

    Advantages of iir filters

  • Better for approximating analog systems
  • For a given magnitude response specification, IIR filters often require much less computation than an equivalent FIR,particularly for narrow transition bands
Both FIR and IIR filters are very important in applications.

    Generic filter design procedure

  • Choose a desired response, based on application requirements
  • Choose a filter class
  • Choose a quality measure
  • Solve for the filter in class 2 optimizing criterion in 3

Perspective on fir filtering

Most of the time, people do L optimal design, using the Parks-McClellan algorithm . This is probably the second most important technique in "classical"signal processing (after the Cooley-Tukey ( radix-2 ) FFT).

Most of the time, FIR filters are designed to have linear phase. The most important advantage of FIR filters over IIRfilters is that they can have exactly linear phase. There are advanced design techniques for minimum-phase filters,constrained L 2 optimal designs, etc. (see chapter 8 of text).However, if only the magnitude of the response is important, IIR filers usually require much fewer operations and aretypically used, so the bulk of FIR filter design work has concentrated on linear phase designs.

Questions & Answers

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are you nano engineer ?
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Mostly, they use nano carbon for electronics and for materials to be strengthened.
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Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
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Graphene has a hexagonal structure
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Cied
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I start with an easy one. carbon nanotubes woven into a long filament like a string
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many many of nanotubes
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what is system testing?
AMJAD
preparation of nanomaterial
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Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
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what is system testing
AMJAD
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In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
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after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
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Source:  OpenStax, Fundamentals of signal processing. OpenStax CNX. Nov 26, 2012 Download for free at http://cnx.org/content/col10360/1.4
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