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參數(shù)資料
| 型號： | HSP43216 |
| 廠商： | Intersil Corporation |
| 英文描述： | Halfband Filter |
| 中文描述： | 半帶濾波器 |
| 文件頁數(shù)： | 15/19頁 |
| 文件大?。?/td> | 144K |
| 代理商： | HSP43216 |
3-207
The Quadrature to Real Conversion mode is most easily
understood by first considering an implementation using a
7 tap transversal filter as shown in Figure 19. By examining
the combination of interpolation, filtering, and up
conversion it is seen that a particular output is only
dependent on the sum-of-products for the even indexed
samples and coefficients or the sum-of-products for the
odd indexed samples and coefficients. This computational
partitioning allows the dual interpolation filters required in
this mode to be realized using the same polyphase filter
structure used in the other modes. A functional block
diagram of the polyphase implementation for Quadrature to
Real Conversion mode is shown in Figure 20. In this
implementation, the real and imaginary components of a
complex input stream drive the even and odd tap filters.
The output of each filter is then modulated by the non-zero
mix factors and multiplexed into a single real output stream.
FIGURE 18. QUADRATURE TO REAL CONVERSION
REAL OUTPUT
UPCONVERTED SIGNAL
FILTER PASSBAND
INPUT SIGNAL SPECTRUM
0
f
’S
/2
f
’S
-f
’S
/2
0
f
’S
/2
f
’S
-f
’S
/2
0
f
S
2f
S
-f
S
f
S
= INPUT SAMPLE RATE
f
’S
= INTERPOLATED SAMPLE RATE, 2f
S
INTERPOLATED SIGNAL
0
f
’S
/2
f
’S
-f
’S
/2
C0 C1 C2 C3 C4 C5 C6
0,1,0,-1...
-1,0,1,0...
HALFBAND FILTER
..R1,R0
2
..R1,0,R0,0
C0 C1 C2 C3 C4 C5 C6
..,Y2,Y1,Y0
..I1,I0
2
..I1,0,I0,0
Y(0) = 0(0(C0)+R0(C1)+0(C2)+R1(C3)+0(C4)+R2(C5)+0(C6))+
-1(0(C0)+I0(C1)+0(C2)+I1(C3)+0(C4)+I2(C5)+0(C6))
Y(1) = 1(R0(C0)+0(C1)+R1(C2)+0(C3)+R2(C4)+0(C5)+R3(C6))+
0(I0(C0)+0(C1)+I1(C2)+0(C3)+I2(C4)+0(C5)+I3(C6))
Y(2) = 0(0(C0)+R1(C1)+0(C2)+R2(C3)+0(C4)+R3(C5)+0(C6))+
1(0(C0)+I1(C1)+0(C2)+I2(C3)+0(C4)+I3(C5)+0(C6))
Y(3) = -1(R1(C0)+0(C1)+R2(C2)+0(C3)+R3(C4)+0(C5)+R4(C6))+
0(I1(C0)+0(C1)+I2(C2)+0(C3)+I3(C4)+0(C5)+I4(C6))
HALFBAND FILTER
COS((
n
+1)
π
/2)
SIN(-(
n
+1)
π
/2)
+
FIGURE 19. QUADRATURE TO REAL CONVERTER USING
TRANSVERSAL FILTERS
Y(0) = -1(I0(C1)+I1(C3))+I2(C5))
Y(1) = 1(R0(C0)+R1(C2)+R2(C4))+R3(C6))
Y(2) = 1(I1(C1)+I2(C3)+I3(C5))
Y(3) = -1(R1(C0)+R2(C2)+R3(C4)+R4(C6))
C0 C2 C4 C6
C1 C3 C5
R
E
G
ODD TAP FILTER
EVEN TAP FILTER
1,-1,1,-1,..
COS LO
-1,1,-1,1..
SIN LO
..R1,R0
..I1,I0
M
U
X
..,Y2,Y1,Y0
FIGURE 20. POLYPHASE IMPLEMENTATION OF
QUADRATURE TO REAL CONVERTER
HSP43216
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HSP43216JC-52 | Halfband Filter |
| HSP43220JC-15 | Circular Connector; MIL SPEC:MIL-C-5015; Body Material:Metal; Series:GT; No. of Contacts:4; Connector Shell Size:24; Connecting Termination:Solder; Circular Shell Style:Box Mount Receptacle; Body Style:Straight |
| HSP43220GC-25 | Decimating Digital Filter |
| HSP43220GC-33 | Decimating Digital Filter |
| HSP43220VC-33 | Decimating Digital Filter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HSP43216_07 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Halfband Filter |
| HSP43216_08 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Halfband Filter |
| HSP43216GC-52 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Halfband Filter |
| HSP43216GI-52 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Digital Filter |
| HSP43216J1-52 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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