Communication Processor Module
16-46 MPC823e REFERENCE MANUAL MOTOROLA
DSP
COMMUNICATION
16
PROCESSOR MODULE
16.3.4.3 FIR3–COMPLEX C, COMPLEX X, AND REAL/COMPLEX Y. The FIR3 function
implements a basic FIR filter with k complex coefficients, complex input samples, and real
or complex output. The input data is in a circular buffer with size M+1 and the output data is
in a circular buffer with size N+1.
Figure 16-16. FIR2 Implementation Example
T
T
T
∑
X(N)
Y(N)
C(0)
C(1)
C(2)
C(K-1)
{COMPLEX}
{REAL OR COMPLEX}
{COMPLEX}
OR Y n
()
Cp
()
Xn p
–()
p0=
k1
–
∑
=
Yn
()
Real C p
()
Xn p
–()
p0=
k1
–
∑
=
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