<< Chapter < Page Chapter >> Page >

    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

richa Reply
if sinx°=sin@, then @ is - ?
the value of tan15°•tan20°•tan70°•tan75° -
0.037 than find sin and tan?
Jon Reply
cos24/25 then find sin and tan
Deepak Reply
Santosh Reply
At the start of a trip, the odometer on a car read 21,395. At the end of the trip, 13.5 hours later, the odometer read 22,125. Assume the scale on the odometer is in miles. What is the average speed the car traveled during this trip?
Kimberly Reply
-3 and -2
Julberte Reply
tan(?cosA)=cot(?sinA) then prove cos(A-?/4)=1/2?2
Chirag Reply
tan(pi.cosA)=cot(?sinA) then prove cos(A-?/4)=1/2?2
Chirag Reply
sin x(1+tan x)+cos x(1+cot x) = sec x +cosec
Ankit Reply
let p(x)xq
Sophie Reply
To the nearest whole number, what was the initial population in the culture?
Cheyenne Reply
do posible if one line is parallel
Fran Reply
The length is one inch more than the width, which is one inch more than the height. The volume is 268.125 cubic inches.
Vamprincess Reply
Using Earth’s time of 1 year and mean distance of 93 million miles, find the equation relating ?T??T? and ?a.?
James Reply
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris Reply
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele Reply
Got questions? Join the online conversation and get instant answers!
QuizOver.com Reply

Get the best Algebra and trigonometry course in your pocket!

Source:  OpenStax, Fundamentals of signal processing(thu). OpenStax CNX. Aug 07, 2007 Download for free at http://cnx.org/content/col10446/1.1
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Fundamentals of signal processing(thu)' conversation and receive update notifications?