參數(shù)資料
型號: DSP56600
廠商: 飛思卡爾半導體(中國)有限公司
英文描述: Implementing Viterbi Decoders Using the VSL Instruction on DSP Families
中文描述: 維特比解碼器實現(xiàn)上使用DSP的家庭教學的VSL
文件頁數(shù): 27/108頁
文件大?。?/td> 726K
代理商: DSP56600
The Viterbi Algorithm
Algorithmic Enhancements
Viterbi Decoder Implementation
For More Information On This Product,
Go to: www.freescale.com
2-13
Figure 2-8
Encoder Tap Symmetry to Reduce Calculations
00100
10100
01000
01001
11
00/0
11/2
Decoder
input
S
1
S
0
S
2
S
3
S
4
1
1
D
D
2
D
3
D
4
D
5
00100
10100
01000
01001
S
1
S
0
S
2
S
3
S
4
1
D
D
2
D
3
D
4
D
5
11/2
00/0
If all polys have
taps at the input
,
branches into the
same state will
have complement
branch metrics.
If all polys have
taps at the last (S
4
)
state bit, branches
into the lower state
pair will be flipped
versions of the
upper state
branches.
F
Freescale Semiconductor, Inc.
n
.
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