Advantages and disadvantages of FIR filters

FIR short terms is finite impulse response. FIR filter are called as non-recursive filters because they do not use the feedback.This article gives the information about advantages and disadvantages of  FIR filters to know more details about it. 

Advantages of  FIR filters :
  • FIR filter are always stable
  • It is simple
  • FIR filter are having linear phase response
  • It is easy to optimize
  • Non causal
  • Round of noise error are minimum
  • Both recursive as well as non recursive filter can be designed using FIR designing techniques
  • For designing of filter having any arbitrary magnitude response; FIR designing techniques can be easily applied
  • Good performance
  • Robust
  • Necessity of computational techniques for filter implementation
  • Requirement of large storage
  • Incapability of linear phase response
Disadvantages of FIR filters :
  • Large storage requirements
  • Can not simulate prototype analog filter
  • For implementation of FIR filter complex computational techniques are required
  • It is hard to implementation than IIR
  • Expensive due to large order
  • Require more memory
  • Time consuming process

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