Jan 11, 2008 #1 N naresh850 Full Member level 3 Joined Jun 9, 2006 Messages 157 Helped 6 Reputation 12 Reaction score 4 Trophy points 1,298 Activity points 2,249 linear convolution circular convolution What is the difference between Circuler and linear convolution? where circuler convolution is used? -Naresh
linear convolution circular convolution What is the difference between Circuler and linear convolution? where circuler convolution is used? -Naresh
Jan 11, 2008 #2 R rag_perfect Banned Joined Sep 1, 2005 Messages 124 Helped 14 Reputation 28 Reaction score 7 Trophy points 1,298 Location India Activity points 0 When signal has some periodicity like OFDM signal... we have to go for circular convolution to get correct result in stead of liner one...
When signal has some periodicity like OFDM signal... we have to go for circular convolution to get correct result in stead of liner one...
Jan 11, 2008 #3 F flam157 Newbie level 4 Joined Jan 10, 2008 Messages 6 Helped 1 Reputation 2 Reaction score 0 Trophy points 1,281 Location France Activity points 1,309 The difference is that your signal in circular convolution is periodic. For example, when you apply a filter with circular convolution, you do not have the same borders effects.
The difference is that your signal in circular convolution is periodic. For example, when you apply a filter with circular convolution, you do not have the same borders effects.
Jan 13, 2008 #4 F flam157 Newbie level 4 Joined Jan 10, 2008 Messages 6 Helped 1 Reputation 2 Reaction score 0 Trophy points 1,281 Location France Activity points 1,309 Quick example: h : transfer function x : signal linear convolution: y=Σh(n-k)*x(k) ; from 0 to N-1 circular convolution y=Σh[(n-k) mod N]*x(k) ; from 0 to N-1
Quick example: h : transfer function x : signal linear convolution: y=Σh(n-k)*x(k) ; from 0 to N-1 circular convolution y=Σh[(n-k) mod N]*x(k) ; from 0 to N-1