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 Model. CFO & ICI (1). CFO & ICI (2). Frequency function of rectangular, BTRC, and raised-cosine pulse. - PowerPoint PPT PresentationTRANSCRIPT
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Seminar in Summer Vacation
學生:朱峻源指導老師:高永安博士
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Outlines
• System Model
• Pulse-Shaping Function
• ICI Analysis
• Simulations in the Paper
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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
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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
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CFO & ICI (2)
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Frequency function of rectangular, BTRC, and raised-
cosine pulse
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ICI Power for different pulse-shaping function (α=0.2)
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ICI Power for different pulse-shaping function (α=1)
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Conclusion
BTRC pulse-shaping function is better than
the rectangular and the raised-cosine pulse
in ICI reduction.
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Reference
Reduced ICI in OFDM Systems Using the
“Better Than” Raised-Cosine Pulse, IEEE
Communication Letter, 2004 March.
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ICI Power in different sub-carrier, ε=0.05