westocl wrote:
>> westocl wrote:
>>> Hello all.
>>>
>>> Is it feasable to do an fft in 'real time' on different 'blocks' of
> data?
>>> (i understand the nomenclature real time may be inappropriate).
>>>
>>>
>>> Im thinking, in general usage of an FFT, some x[n] comes in one sample
> at
>>> a time and fills up a buffer and when that buffer (lets call it 128
> time
>>> domain samples) is filled a FFT is taken and the 'output' is 128 points
> of
>>> frequncy domain data.
>>>
>>> Now.. instad of somthing like a sliding DFT where a window evaluates
> the
>>> previous 127 samples along with one new one, i have a situation where
> i
>>> want to give the 'fft buffer' 128 NEW data points... so every single
> 'time
>>> instant'...128 new x[n] data are available.
>>>
>>> If this were done would I get a new FFT output at every time instant?
>> You confused me. 128 new instances of x[n] for every n? How?
>>
>> Jerry
>> --
>> Engineering is the art of making what you want from things you can get.
>
>
> You are right...My notation is somewhat confusing by using x[n]. But
> imagine we had a switch that will switch to an already full buffer at
> every 'sample interval'. Then at the next instant we go to the next 128
> buffer and we call that x[n] and so on..

What fills these nearly full buffers? When? You seem to want 128 new
samples per sampling instant. That can't be sustained.

Jerry
--
Engineering is the art of making what you want from things you can get.