Re: [casper] real sampled fft block for 2 inputs per fpga clock

[G Jones]

The biplex_real_2x is what you want, and it will do two 'polarizations' at
a time.
On Nov 2, 2013 10:56 PM, "Louis Dartez"  wrote:

> Hello Mark, Glenn, et al.,
>
>
> Does anyone know of any CASPER FFT block that will take as inputs two real
> sampled values (per ADC input) and output a single complex-valued frequency
> bin per FPGA clock? The three FFT blocks that I’ve found on the CASPER
> block documentation and the latest mlib library (wideband 
> real
> , biplex real 4x ,
> and the biplex real 2x)
> all accept real sampled values but require a minimum of 4 simultaneous
> values per FPGA clock per ADC input. I could really use an FFT block (and a
> corresponding polyphase FIR block) that will accept only two real sampled
> values for each of a total of four ADC inputs and spit out a single complex
> FFT bin (per stream) per FPGA clock.
>
> Can someone point me in the right direction here?
>
> Thanks!
>
> L
>
>
>
> Louis P. Dartez
>
> Graduate Student
>
> Center for Advanced Radio Astronomy
>
> University of Texas @ Brownsville
>
>
>

[casper] real sampled fft block for 2 inputs per fpga clock

[Louis Dartez]

Hello Mark, Glenn, et al., 


Does anyone know of any CASPER FFT block that will take as inputs two 
real sampled values (per ADC input) and output a single complex-valued 
frequency bin per FPGA clock? The three FFT blocks that I’ve found on the 
CASPER block documentation and the latest mlib library (wideband real, biplex 
real 4x, and the biplex real 2x)  all accept real sampled values but require a 
minimum of 4 simultaneous values per FPGA clock per ADC input. I could really 
use an FFT block (and a corresponding polyphase FIR block) that will accept 
only two real sampled values for each of a total of four ADC inputs and spit 
out a single complex FFT bin (per stream) per FPGA clock. 

Can someone point me in the right direction here?

Thanks!

L



> Louis P. Dartez
> Graduate Student
> Center for Advanced Radio Astronomy
> University of Texas @ Brownsville