CDMA2000 Signaling
R&S
®
CMW-KG8xx/-KM8xx/-KS8xx
479
User Manual 1173.9511.02 ─ 11
Table 4-2: F-SCH Walsh codes dependancies on MuxPDUs per physical layer SDU, RC and frame
type for frame size 20 ms
MuxPDUs/Layer
Frame Type
Rate1
MuxPDUs/Layer
Frame Type
Rate2
RC3
RC4
RC5
1
W
n
64
W
n
128
W
n
64
2
1
W
n
32
W
n
64
W
n
32
4
2
W
n
16
W
n
32
W
n
16
8
4
W
n
8
W
n
16
W
n
8
8
W
n
4
W
n
8
W
n
4
Table 4-3: SCH maximum data rate (kbit/s) dependancies on MuxPDUs per physical layer SDU, RC
and frame type for frame size 20 ms
MuxPDUs/Layer
F-SCH RC=3,4
R_SCH RC=3
F-SCH RC=5
R_SCH RC=4
Frame Type
Rate 1
Frame Type
Rate 2
Frame Type
Rate 1
Frame Type
Rate 2
1
9.6
19.2
14.4
28.8
2
19.2
38.4
28.8
57.6
4
38.4
76.8
57.6
115.2
8
76.8
153.6
115.2
230.4
4.2.9.2
Channelization Codes
The forward CDMA2000 channel is spread using orthogonal Walsh functions W
n
N
defined in terms of the order
N
of the function and the index
n
ranging from
0
to
N–1
.
This index is also called channelization code number. The Walsh functions are con-
structed from a
N x N
Hadamard matrix, generated by means of the following recursive
procedure defined in 3GPP2 C.S0002:
For the spreading operation the binary symbols of the Walsh function are mapped as
follows:
0
is mapped to
+1
and
1
is mapped to
-1
.
Orthogonal Variable Spreading Factor (OVSF) codes provide an alternative scheme of
generating codes that preserve orthogonality between channels. They are derived from
a hierarchical tree.
General Description
深圳德标仪器
135-1095-0799
