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參數(shù)資料
| 型號： | GALAXY |
| 英文描述： | Galaxy Simulation Toolkit User＇s Guide |
| 中文描述： | 銀河仿真工具包用戶指南 |
| 文件頁數(shù)： | 6/23頁 |
| 文件大?。?/td> | 435K |
| 代理商： | GALAXY |
comtech
aha
corporation
PSGalaxy_STK_0100
A subsidiary of Comtech Telecommunications Corporation
Page 3 of 20
For example, in a (64,57)x(32,26) code, the X
feedback (
xfbk
) multiplier could be set to 16/32,
while the Y feedback (
yfbk
) multiplier could be set
to 18/32.
The feedback values must be tuned for the
number of iterations allowed in a system. For less
iterations than the above guidelines, the feedback
values should be increased. For more iterations, the
values should be decreased. For example, when
using a (64,57)x(64,57) code with only 2 iterations,
the feedback multiplier for both axes should be set
to 20/32. Conversely, in a system that allows 12 or
more iterations, the value for the feedback should be
lowered to 16/32.
The feedback may also need to be tuned
depending on the number of soft input bits
(
quant_size
). This parameter will only affect the
optimum feedback multiplier value slightly,
meaning that it should be adjusted by only 2/32 or 4/
32 to allow for these differences. Since systems vary
widely, the system designer should experiment with
various feedback multiplier values to obtain the best
performance. Recommended starting values for
feedback are listed in Table 2. The code
combination shows 2D and 3D combinations of
Hamming and parity codes.
Table 2:
Suggested Feedback Starting Values
Figure 1:
Galaxy Block Diagram
CODE COMBINATION
X FEEDBACK
(xbck)
16/32
20/32
30/32
12/32
16/32
30/32
Y
FEEDBACK
(ybck)
16/32
20/32
30/32
12/32
16/32
30/32
Z
FEEDBACK
(zbck)
N/A
N/A
N/A
12/32
20/32
30/32
2D Hamming, Hamming
2D Hamming, Parity
2D Parity, Parity
3D Hamming, Hamming, Hamming
3D Hamming, Hamming, Parity
3D Parity, Parity, Parity
Output Data Storage
Dual Port RAM
I
I
I
I
I
I
I
I
I
I
I
I
M
M
M
M
M
M
M
M
O
O
O
O
O
O
O
O
B
IDATA
IRDY
IACPT
ODATA
ORDY
OACPT
S
S
C
IDATA
IRDY
IACPT
ODATA
ORDY
OACPT
SYNCI
SCYNIO
SYNCI
SYNCIO
SYNCO
SYNCO
J
J
C
C
R
B
Input Data Storage
Dual Port RAM
(2x input block size)
Intermediate Storage
(1x or 2x block size)
TPC Engine
TPC Core
JTAG
Controller
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| GALB-1 | 制造商:Thomas & Betts 功能描述:1/2"BX/SURF CVR,ALUM,LB-STYLE,XP 制造商:Thomas & Betts 功能描述:Outlet Boxes Hazardous Locations |
| GALB-1-OR | 制造商:Thomas & Betts 功能描述:1/2BX/SURF CVR,LB-STYLE,XP,O-RING |
| GALB-2 | 制造商:Thomas & Betts 功能描述:3/4"BX/SURF CVR,ALUM,LB-STYLE,XP 制造商:Thomas & Betts 功能描述:Outlet Boxes Hazardous Locations |
| GALB-2-OR | 制造商:Thomas & Betts 功能描述:3/4BX/SURF CVR,LB-STYLE,XP,O-RING |
| GALB-3-OR | 制造商:Thomas & Betts 功能描述:1 BX/SURF CVR,LB-STYLE, XP, O-RING |
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