Re: Can a LPF have linear phase when the impuse response is not symmetric?

On 31 Mrz., 18:08, Andor <andor.bari...@xxxxxxxxx> wrote:
On 31 Mrz., 17:12, dbell <bellda2...@xxxxxxx> wrote:





On Mar 31, 8:45 am, Andor <andor.bari...@xxxxxxxxx> wrote:

On 31 Mrz., 13:45, Randy Yates <ya...@xxxxxxxx> wrote:

Andor <andor.bari...@xxxxxxxxx> writes:
[...]
(except for a delay, wich is symmetric and anti-symmetric)

We're on a bit of a slippery slope (in my opinion) since these
terms aren't fully defined, but in the case of the terminology
"even symmetric" and "odd symmetric" that I've learned, an
odd-symmetric function is necessarily 0 at t=0.

How about [-1 2 1]? Or [0 1 0]?

Regards,
Andor

Are either of these supposed to be odd symmetric?

Both of them are odd symmetric, and therefore linear-phase FIR filters.

Oops. Of course they're not, sorry. So this just means that the delay
isn't an exception to the rule I posted above.

Regards,
Andor
.

Relevant Pages

  • Re: Can a LPF have linear phase when the impuse response is not symmetric?
    ... (except for a delay, wich is symmetric and anti-symmetric) ... but in the case of the terminology ... odd-symmetric function is necessarily 0 at t=0. ...
    (comp.dsp)
  • Re: Can a LPF have linear phase when the impuse response is not symmetric?
    ... (except for a delay, wich is symmetric and anti-symmetric) ... but in the case of the terminology ... odd-symmetric function is necessarily 0 at t=0. ...
    (comp.dsp)
  • Re: need a LOONG delay line
    ... As I clearly stated digitising is out, ... digitising reference frequency wich doesnt then even need to be delayed ... so you're wanting to find a delay line with a propogation delay that's ... most oscillators are prone to 1/f noise wich seems to be most pronounced at ...
    (sci.electronics.design)
  • Re: simple frequecny multiplier
    ... The Laser Gyro would obviously not work if it had to reflect the light path ... to virtualy cancel out any change in delay exept for very high velocities. ... mathmatical aproaches (wich might seem dubious) prove this is always a null ... be more acurate than atomic clocks now and only revently did i think it was ...
    (sci.electronics.design)
  • Re: Strange Mosfet Results
    ... related to diming rather then delay before starting to turn off. ... the miler efect multiplies the efective capacitance by the gain of the ... wich both vary with curent. ...
    (sci.electronics.basics)