5, we list the
radio configurations for the forward traffic channel.
Ablock diagram of the PN-code spreading and FL physical channel mapping is shown in Fig. 1.17
for radio configurations 3, 4, and 5, using spreading rate 1.
Long Code
Mask
X
PN Code
3.6864 Mcps
1 Chip
Delay
Decimate
by 2
X
X
Complex
PN Code
I PN Code
Q PN Code Walsh
FIGURE 1.16 Reverse link complex PN-coded generation.
The signal is now mapped to a modulation format and then quadrature spread (see Fig. 1.18).
For radio configurations 6, 7, 8, and 9, using spreading rate3, we have the forward-spreading operations
shown in Fig. 1.19.
Convolutional coding is used on the fundamental and supplemental channels. Their coding rates
depend on the radio configuration used. The supplemental channel also supports turbo coding, provided
WIRELESS TOPICS 15
TABLE 1.5 Forward Link Radio Configuration Characteristics
Radio Number of FEC Modulation
configuration carriers Data rates supported technique scheme
1 1 1.2K, 2.4K, 4.8K, 9.6K R 1/2 BPSK
2 1 1.8K, 3.6K, 7.2K, 14.4K R 1/2 BPSK
3 1 1.2K, 1.35K, 1.5K, 2.4K, R 1/4 QPSK
2.7K, 4.8K, 9.6K, 19.2K,
38.4K, 76.8K, 153.6K
4 1 1.2K, 1.35K, 1.5K, 2.4K, R 1/2 QPSK
2.7K, 4.8K, 9.6K, 19.
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