Altera FFT MegaCore Function - Manual (Page 28)

Figure 3-2: Single-Output FFT Engine
H[k,m]
G[k,0]
G[k,1]
G[k,2]
G[k,3]
x[k,0]
x[k,1]
x[k,2]
x[k,3]
-j
-1 j
-1
-1
j
-1
-j
RAM
RAM
ROM
FFT Engine
BFPU
I/O Data Flow
Streaming FFT
The streaming FFT allows continuous processing of input data, and outputs a continuous complex data
stream without the need to halt the data flow in or out of the FFT IP core.
The streaming FFT generates a design with a quad output FFT engine and the minimum number of
parallel FFT engines for the required throughput.
A single FFT engine provides enough performance for up to a 1,024-point streaming I/O data flow FFT.
Using the Streaming FFT
When the data transfer is complete, the FFT deasserts
sink_sop
and loads the data samples in natural
order.
UG-FFT
2014.12.15
I/O Data Flow 3-5
FFT IP Core Functional Description Altera Corporation
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