mpc823rg Freescale Semiconductor, Inc, mpc823rg Datasheet - Page 519

• Manufacturer Part Number: mpc823rg
• Description: Mpc823 Powerquicc Integrated Communications Processor For Portable Systems
• Manufacturer: Freescale Semiconductor, Inc

16.3.4.9.3 LMS1 Parameter Packet. The LMS1 parameter packet is composed of seven
16-bit half-words and is described in the table below.
16.3.4.9.4 Application Example. The LMS1 is used in the echo cancellation update.
16.3.4.10 LMS2–COMPLEX COEFFICIENTS, COMPLEX SAMPLES, AND
REAL/COMPLEX SCALAR. The LMS2 function implements a basic FIR filter coefficients
update and the sample pointer is incremented by two, which is required for fractionally
spaced equalizer updates. The coefficients and input samples are complex numbers, but
the scalar is a real or complex number.
OFFSET + 0
OFFSET + 2
Half-word 1
Half-word 2
Half-word 3
Half-word 4
Half-word 5
Half-word 6
Half-word 7
ADDRESS
0
S
1
0
CBASE
XYPTR
NAME
EPTR
RES
RES
M
K
W
2
Figure 16-30. LMS2 Implementation Example
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Table 16-16. LMS1 Parameter Packet
3
I
Reserved
Number of Taps-1.
Filter Coefficients Vector Base Address Pointer
Samples Buffer Size-1. The minimum sample buffer size is 8 (2 samples).
Pointer to New Sample Data Pointer
Pointer to Scalar
Reserved
MPC823 REFERENCE MANUAL
4
Z
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C n 1
5
0
+
i
=
6
I=1 (ONE ITERATION)
INDEX
C n i E X n i –
+
7
8
0
DESCRIPTION
9
0
Communication Processor Module
10
0
11
12
01010
13
14
16-67
15