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Topic: Iterative Match Filterings
Replies: 33   Last Post: Apr 17, 2012 6:13 PM

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 Eric Jacobsen Posts: 107 Registered: 12/7/04
Re: Iterative Match Filterings
Posted: Apr 6, 2012 3:57 PM

On Fri, 6 Apr 2012 12:03:28 -0700 (PDT), Bret Cahill
<BretCahill@peoplepc.com> wrote:

>> >>>>>> Do you mean matched filtering or is "match" filtering something
>> >>>>>> different?

>>
>> >>>>> North filter.
>>
>> >>>> Far more commonly known as a "matched filter",
>>
>> >>> How long did it take you to figure that out?
>>
>> >>>> which requires no
>> >>>> special kind of convolution, only the ordinary, mundane kind. =A0The=

>re's
>> >>>> no deconvolution involved.
>>
>> >>> How is the original waveform recovered with a North Filter?
>>
>> >> Bret, can you stick with the common semantic? =A0before today, i have
>> >> never heard of a "North filter".

>>
>> > Is anyone still whining about "match filter" or "matched filter", both
>> > of which google up tens of thousands of on point hits in less time
>> > than it takes to play trifling word games.

>>
>> >> i am assuming from Eric's response and
>> >> yours, that it is synonymous with "matched filter".

>>
>> >> a matched filter is not about recovering an original waveform.
>>
>> >http://en.wikipedia.org/wiki/Matched_filter
>>
>> > Scroll down to the match filter recovery of the binary signal
>>

>
>In that example the "detection" of the signal requires recovering the
>original waveform.

You're calling it a waveform, other people may call it the modulated
data, which can be from a symbol alphabet other than binary.

You need to be clear what you mean if you want to be understood.

>> if you think that example is about producing a
>> signal, rather than determining if a 0 or 1 had been transmitted, then
>> you're mistaken.

>
>You think any convolution of a square wave form with its kernel could
>look like _that_?

>> also, Wikipedia should not be taken as authoritative
>
>You think an authoritative article is necessary for an _example_?
>
>Maybe you think the author put that nonsense in because he wanted to
>help out anyone trying to mislead on how match filtering can be used
>for wave form recovery?

Again, you miss the point by quite a long ways.

Eric Jacobsen
Anchor Hill Communications
www.anchorhill.com