Datasheet

253
32072H–AVR32–10/2012
AT32UC3A3
Figure 17-7. Error Evaluator Block Diagram
The Chien Search takes charge of determining if an error has occurred at symbol N according to
the scheme in Figure 17-8 on page 253
Figure 17-8. Chien Search Block Diagram
ω
0
ω
4
ω
1
ω
5
ω
3
ω
7
+
α
-4
α
-1
α
-3
α
-5
α
-7
Array - Mult
Rom 1024x10
GF(2 ) inverted
Λ
odd( α )
-j
10
ErrorLoc
Error value
@ position j
ω
(α )
-j
λ
0
Not
Error Located
counter
Deg ree of Lambda
Error locatedFlag error
+
+
+
λ
0
λ
1
λ
2
λ
3
λ
8
λ
7
Λ(α )
-j
α
-1
α
-2
α
-8
α
-3
α
-7
Λodd(α )
-j