seminar in summer vacation
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Seminar in Summer Vacation
學生：朱峻源指導老師：高永安博士
Outlines
• System Model
• Pulse-Shaping Function
• ICI Analysis
• Simulations in the Paper
System Model1
2 2
0
*
2 ( )
( ) ( )
1 k m[ ]
0 k m
( ) is the time-limited pulse shaping function
1 k m( )
0 k m
c k
k m
Nj f t j f t
kk
k m
j f f t
x t e a p t e
E a a
p t
p t e dt
CFO & ICI (1)
12 ( ) 2(2 )
0
:
( ) ( ) ( )
: ; :
c k
Nj f f t j f tj j ft
kk
the baseband signal of received signal
r t x t e e e a p t e
frequency offset f phase error
CFO & ICI (2)
Frequency function of rectangular, BTRC, and raised-
cosine pulse
ICI Power for different pulse-shaping function (α=0.2)
ICI Power for different pulse-shaping function (α=1)
Conclusion
BTRC pulse-shaping function is better than
the rectangular and the raised-cosine pulse
in ICI reduction.
Reference
Reduced ICI in OFDM Systems Using the
“Better Than” Raised-Cosine Pulse, IEEE
Communication Letter, 2004 March.
ICI Power in different sub-carrier, ε=0.05
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