Specifications
5
ESG Option 201 Real-time cdma2000 personality
The ESG’s Option 201 personality provides a complete solution for
testing of IS-2000 mobile receiver designs. This section provides an
overview of the Option 201 real-time IS-2000 system. It also describes
the Option 201 features.
Overview
The ESG with the Option 201 personality simulates a basestation trans-
mitter to create a forward spread rate 1 (SR1) link for an IS-2000
mobile. The flexibility inherent in the ESG signal generator allows flexi-
ble channel configurations with individually adjustable power levels,
customized user data, and customizable data rates. Radio configurations
1-5 (RC1-RC5) are supported. An IS-2000 RC4 forward traffic link, as
supported by the personality, is shown below in Figure 1. Long and
short coding, cyclic redundancy checks, convolutional encoding or tur-
bocoding, interleaving, power control, and complex scrambling are all
supported. Paging, Sync, and Pilot channels are similarly supported.
Because IS-2000 provides backward compatibility with IS-95 in RC1 and
RC2 configurations, the Option 201 personality also supports the IS-95
standard.
The menu structure of Option 201 shown in Figure 2 illustrates the
flexibility and features of the system. The BTS Setup menu, shown in
the bottom of the display, allows configuration of parameters common
to all channels, while the Link Control softkey provides a separate
configuration menu for individual channels.
Figure 1. Forward coding path for an IS-2000 SR1 RC4 traffic channel
I
Q
8.6 kbps
1.2288 Mcps
1.2288 Mcps
FIR
FIR
Σ
Add CRC and
Tail Bits
User Long
Code Mask
Long Code
Generator
Walsh 128
Generator
PRBS or
User-defined
Data
S-P
P.C. Bits
PC
PC
Dec
1/2 Rate Conv.
Encoder or
turbocoder
Interleaver
Long Code
Decimator
19.2 ksps
I Short Code
Q Short Code
Σ
9.6 kbps
Power
Control
Puncture
I
I
Q
Q
1.2288
Mbps
19.2
ksps
800 bps
Decimated by
Walsh Length/2
19.2 ksps
Puncture
Timing
800 bps
1.2288
Mbps
9.6 ksps
9.6 ksps
1.2288
Mbps
Q
I
1.2288
Mcps
1.2288
Mcps
1.2288 Mcps
1.2288 Mcps
+
-
+
+
19.2
ksps
Figure 2. Screen printout of CDMA2000 menu