Timeline for Adaptive equalization vs inverse of transfer function
Current License: CC BY-SA 4.0
8 events
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| Feb 23, 2023 at 11:43 | comment | added | Dan Boschen | @mohammadsdtmnd sorry I don’t understand your point. Even theoretically, the IIR inverse filter is not possible to use in a mixed phase case because it will be unstable in a causal solution (not potential but always is). Only a minimum phase system has a causal stable inverse so that is the only case in which an IIR inverse filter can be used. | |
| Feb 23, 2023 at 11:08 | comment | added | mohammadsdtmnd | Then I think saying don't use it, since you have mixed system, is not correct. The corrected one: In mixed system IIR is better option theoretically but they have potential to be unstable, then typycally many guys opting IIR estimation using FIR. It neglects my @, O_O! Maybe because your are the answer composer. | |
| Feb 23, 2023 at 3:37 | comment | added | Dan Boschen | @mohammadsdtmnd Do NOT use IIR because you have a mixed phase system; the IIR will be unstable. Yes an FIR filter can create the same response as an IIR filter as long as the impulse response of the IIR filter is decaying with time and eventually insignificant. It won't have the same poles and zeros but it will have the same response. Please post as another question if that doesn't make sense to you as long dialogue in the comments is discouraged. Also when commenting use @ with my name otherwise I am not alerted. | |
| Feb 20, 2023 at 13:38 | comment | added | mohammadsdtmnd | THX. Yes. But you've told typically not use IIR because we have mixed system. I think this is not right. Am I right? | |
| Feb 20, 2023 at 12:25 | comment | added | Dan Boschen | @mohammadsdtmnd Great observation! As long as the IIR impulse response is decaying over the longer time duration, eventually to insignificance, we can create any IIR with an FIR given the coefficients of the FIR are the samples of that impulse response (it just takes more coefficients than we could otherwise do with an IIR). Does that make sense? | |
| Feb 20, 2023 at 7:13 | comment | added | mohammadsdtmnd | Finally youve mentioned: IIR not used since impulse reponses are mixed. But it seems IIR can model the mixed better than FIR, since inverses of all FIR filters have poles and then it seems we need IIR doesn't it? FIR have only zeros but IIR have both zeros and poles and it seems like the mixed case doesn't it? | |
| Feb 16, 2020 at 21:04 | vote | accept | Phobos | ||
| Feb 15, 2020 at 17:05 | history | answered | Dan Boschen | CC BY-SA 4.0 |