CDMA2000 Generator
R&S
®
CMW-KG8xx/-KM8xx/-KS8xx
929
User Manual 1173.9511.02 ─ 11
Band Class
Number
Band Class Name
Channel
Number N
Center
Frequency [MHz]
18
Public Safety Bands 700
MHz
0
≤
N
≤
240
757 + 0.05 N
19
Lower 700 MHz
0
≤
N
≤
360
728 + 0.05 N
6.2.3 Radio Configurations
The CDMA2000 standard defines several Radio Configurations (RC). A RC defines a
set of forward and reverse traffic channel transmission formats that are characterized
by certain physical layer parameters such as transmission rates, modulation character-
istics, and spreading rate.
The supported forward channel RCs are listed in the table below.
Table 6-2: Supported radio configurations for the forward channel
Radio Con-
figuration
Spreading
Rate
Modulation
max Data Rate
[kbps]
Coding
QOF
1
1
O-QPSK
9.6
1/2 Convolutional
0
2
1
O-QPSK
14.4
3/3 Convolutional
0
3
1
H-PSK
153.6
1/4 Convolutional,
Turbo Convolu-
tional
0 to 3
4
1
H-PSK
307.2
1/2 Convolutional,
Turbo Convolu-
tional
0 to 3
5
1
H-PSK
230.4
3/8 Convolutional,
Turbo Convolu-
tional
0 to 3
The R&S
CMW supports only spreading rate 1 (also called 1x). For 1x the forward as
well as the reverse channel use a single direct-sequence spread carrier with a chip
rate of 1.2288 Mcps.
The R&S
CMW supports several modulation schemes, to be selected as radio configu-
ration:
●
O-QPSK
: for cdmaOne connections (RC 1 and 2).
●
H-PSK
: for CDMA2000 connections (RC 3, 4 and 5).
6.2.4 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-
General Description
深圳德标仪器
135-1095-0799