>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 on
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 12
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 situatio
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 tim
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 ca
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 nex
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.


It seems thats exactly the case i will have... What i want to do i
analagous to having 128 antennas and a situation where i have to take th
FFT for each antenna. So some kind of rotary switch gives me the ne
antenna input data at every sample... and will keep spinning.