Chapter 6 Wireless and Mobile Networks - Network and Systems Lab

CDMA Encode/Decode
sender
data
bits
code
d 0 = 1
d 1 = -1
1 1 1 1 1 1 1 1
-1
-1
-1
-1
-1
-1
-1
-1
slot 1 slot 0
Z i,m = d i
. cm
channel output Z i,m
-1
-1
-1
1
-1
1 1 1
slot 1
channel
output
1 1 1 1
-1
-1
-1
-1
slot 0
channel
output
received
input
receiver
code
-1
-1
-1
1 1 1 1 1 1 1 1
-1
-1
-1
-1
-1
1 1 1 1
-1
-1
-1
-1
1 1 1 1
-1
-1
-1
-1
slot 1 slot 0
D i = Z i,m
. cm
m=1
M
M
d 1 = -1
slot 1
channel
output
d 0 = 1
slot 0
channel
output
6: Wireless and Mobile Networks 6-15