<s>
The	O
sparse	B-General_Concept
Fourier	I-General_Concept
transform	I-General_Concept
(	O
SFT	O
)	O
is	O
a	O
kind	O
of	O
discrete	B-Algorithm
Fourier	I-Algorithm
transform	I-Algorithm
(	O
DFT	O
)	O
for	O
handling	O
big	B-Application
data	I-Application
signals	O
.	O
</s>
<s>
However	O
,	O
with	O
the	O
advent	O
of	O
big	B-Application
data	I-Application
era	O
,	O
the	O
FFT	O
still	O
needs	O
to	O
be	O
improved	O
in	O
order	O
to	O
save	O
more	O
computing	O
power	O
.	O
</s>
<s>
Recently	O
,	O
the	O
sparse	B-General_Concept
Fourier	I-General_Concept
transform	I-General_Concept
(	O
SFT	O
)	O
has	O
gained	O
a	O
considerable	O
amount	O
of	O
attention	O
,	O
for	O
it	O
performs	O
well	O
on	O
analyzing	O
the	O
long	O
sequence	O
of	O
data	O
with	O
few	O
signal	O
components	O
.	O
</s>
