Pipeline FFT Architectures Optimized for FPGAs

Table 3

SQNR with different FFT sizes.

	FFT size	Input data width	Twiddle factor width	Stage number	SQNR (dB)
R4SDC	16	16	16	2	82.29
	64	16	16	3	73.49
	256	16	16	4	67.47
	1024	16	16	5	61.25
R2^2SDF	16	16	16	2	81.82
	64	16	16	3	74.47
	256	16	16	4	68.22
	1024	16	16	5	62.68