FFT SIZE DETECTION

"PARTICLEREDDY" <particlereddy@gmail.com> writes:
> before saying it as a funny question, try to put
> your brain into new technologies then you will know, where
> exactly this question has arised.

Maybe he is listening to radio through his teeth and he
is trying to decode the secret message.

> 7. Lastly this will be my last post in this topic, i solved my problem. 

Let me guess: you put your brain into a tinfoil had?
But Particle, this technology is not that new.

Anton

glen herrmannsfeldt wrote:

> 
> With additional explanation it makes slightly more sense, but still
> not much.  If the goal is an FFT of 10000 points, partial FFTs,
> other than those done by the FFT algorithm itself, are not really
> a partial solution.


No actually that is completely incorrect. In fact the opposite may have
been  the complete solution to the problem.

	 If the original signal were homogeneously stationary (as in all
frequencies  not varying over its entire length) and data arrived in the
form of random FFT blocks that were in lengths of powers of 2 (i.e. 128
256 512 ..) then deciphering the length of each individual block and
constructing an FFT (as well as an IFFT) of the entire record is in fact
quite trivial.

	Even if the signal were not completely stationary during the whole
record if it were only  changing very slowly with time the problem would
be fairly simple.

-jim

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>
> 7. Lastly this will be my last post in this topic, i solved my problem.

How did you solve it? I'm curious, and would like you to help us to all
understand.

On 19 Jul 2006 03:05:57 -0700, "PARTICLEREDDY"
<particlereddy@gmail.com> wrote:

>hi rick
>         really pity that i didnt even bothered about the answer or any
>questions i asked. seems you are hovering in a fantastic world that i
>will come to your office and that you do all the so said stuff. To tell
>frankly, you are no engineer by profession. you did talked all the dirt
>and saying that you didnt insult anyone. i think you are trying to
>impress upon the experts in this group. first and last thing, i dont
>involve in tussle with brutes (YOU) (SORRY, I DIDNT INSULT YOU). I
>
>points i would like to expand
>
>1. when somebody called my question funny, i replied that useless
>fellow aptly in a befiting manner, he could have asked "particle,
>please do provide more details instead of calling it as funny question
>and andor i answered well with full respect, i know him very well."
>
>2. second i didnt insult any one..

Well, I saw you do it, and you did it again in your first paragraph in
this post.

>3. i wont get provoked for unecessary and unwanted matters from others
>(as a matter of fact from you). (The say when elephants are marching
>royally, darks will be barking, so you are barking when i am not
>involved in tussle at all ...)
>
>4. i have respect for each and everybody in this comp.dsp.

And I'm the Pope.

>Also you post my reply in this group also.
>
>5. lastly you ask your mom and dad as why didnt they teach YOU
>manners,respect and common sense to you to not interefere in other's
>business.
>
>6. TO all dear respected members, i didnt involve in insult to anyone.
>
>7. Lastly this will be my last post in this topic, i solved my problem.
>
>
>---------------------BYE-----------------------------------

Yikes.



Eric Jacobsen
Minister of Algorithms, Intel Corp.
My opinions may not be Intel's opinions.
http://www.ericjacobsen.org

> >4. i have respect for each and everybody in this comp.dsp.
>
> And I'm the Pope.

One would suspect that this is the first-ever mention of the pope on
comp.dsp, but alas it is not.

PARTICLEREDDY wrote:
>
> ANY FURTHER AGAIN NO APOLOGIES..i didnt do any mistake. if people
> presume my behaviour as rude, its their mistake.

PARTICLEREDDY> WHO'S THAT WALKING OVER MY BRIDGE?!

little_billy_goat_gruf> only me, only me, little billy goat gruf. i'm
going to the pasture to make myself fat.

PARTICLEREDDY> NO YOU'RE NOT, NO YOU'RE NOT,'CAUSE I'LL GOBBLE YOU UP!

little_billy_goat_gruf> don't take me, don't take me, take my bigger
brother.

PARTICLEREDDY> WHO'S THAT WALKING OVER MY BRIDGE?!


... etc.


--

r b-j