17
Option UN5 (continued)
Code domain power display
Visually check channel configuration.
Prevent mistakes and costly delays
by checking the expected channel
setup before producing the RF signal.
Block diagram
Option UN5 partially coded IS-95
provides the highlighted section of
the physical layer for forward traffic
channels. Option UN5 also includes
a single reverse channel beginning
with short code spreading.
Code domain power view.
Long code
64-ary
modulator
Reverse link
Vecoded
speach data
Convolutional
encoder
Walsh code
sequence
Long code
Forward link
Q short code
I short code
Data in:
• all 0's
• repeating pattern
• random
FIR
FIR
t/2
QPSK
OQPSK
1/2 chip delay
1.2288
Mbps
Not in UN5 Coding in UN5
I
Q
Sums up to
256 channels
64 channels
Interleaver
Σ
Σ
Physical layer of CDMA standard block diagram.
To Next Page
Loading...
Need help?
General
