Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

IFFT Info !

Allo, I would like to have a output of 8192 samples @ 16bits real only with IFFT core. I have a input of 4096 samples@16bits in real only (imaginary is 0) !! It's correct ? I set ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

My design is very simple,

I want to make a OFDM transmitter with 4096 carriers in natural order

Index(0) = frequency 0

Index(1) = frequency 1 (12.207 kHz)

.

.

Index(4095) = frequency 4095 (50MHz)

My sampling rate is 100MHz and no négatif frequency

-------------------------------------------------------------------------------------------------------------------------------------------------------

Also, I try to simulate in fonctional mode and the FFT core not work!

In burst mode, Sink_ready signal is still high (active) and according to the doc, it should be active only for the length of a block (FIFO) and this length, I do not know !!!!!

Do you have a idea about this ?

Thank you to help me.