Digital Signal Processing Reference
In-Depth Information
CE
0
CE
1
CE
N-1
x
2
= x
1 -
δ
1
2
-1
y
1
x
N-1
x
1
cos
θ
N
d =
x
N
x
0
=k
-/+
-/+
-/+
N
x
N-1
>>N-1
x
i
>> 1
y >> 1
y
N-1
>>N-1
y
1
N
y
2
=
δ
1
2
-1
x
1
+y
1
sin
θ
d =
y
N
+/-
y
0
=0
+/-
_
+/-
_
y
N-1
N
1
θ
θ
0
[N-1]
1
1
θ
0
=
θ
d
θ
1
[N-1]
θ
1
=
θ
d
-
δ
0
∆θ
0
N
θ
θ
2
=
θ
1
-
δ
∆θ
~
0
θ
N
N-1
1
1
-/+
1
-/+
-/+
∆θ
∆θ
0
=tan
-1
2
0
0
∆θ
N-1
=tan
-1
2
-(N-1)
∆θ
1
=tan
-1
2
-1
1
[N-1]
θ
1
θ
[N-1]
1
N-1
θ
0
[N-1]
sign_bit
Figure 12.10
FDA architecture of CORDIC as cascade of CEs
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