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ML7065-033 User’s Manual
Chapter 5 IEEE802.15.4 Modulation
10
5. IEEE802.15.4 Modulation
5.1 Block Diagram of the Modulator Circuit
(1) Binary data for transmission to be input to a modem is mapped to the 16 types of symbols “0” to “F” every
four bits in the order the binary data is input.
(2) As shown in the following table, Symbol-to-Chip Mapping, each symbol is mapped to a set of 32 chip data
values that corresponds.
Symbol-to-Chip Mapping
Data Symbol
(Hex)
Data Symbol
(Binary)
b
0
b
1
b
2
b
3
Chip Values
(c
0
, c
1
,c
2
, •••••,c
29
,c
30
,c
31
)
(I, Q , I , •••••, Q , I , Q)
0
0 0 0 0
1 1 0 1 1 0 0 1 1 1 0 0 0 0 1 1 0 1 0 1 0 0 1 0 0 0 1 0 1 1 1 0
1
1 0 0 0
1 1 1 0 1 1 0 1 1 0 0 1 1 1 0 0 0 0 1 1 0 1 0 1 0 0 1 0 0 0 1 0
2
0 1 0 0
0 0 1 0 1 1 1 0 1 1 0 1 1 0 0 1 1 1 0 0 0 0 1 1 0 1 0 1 0 0 1 0
3
1 1 0 0
0 0 1 0 0 0 1 0 1 1 1 0 1 1 0 1 1 0 0 1 1 1 0 0 0 0 1 1 0 1 0 1
4
0 0 1 0
0 1 0 1 0 0 1 0 0 0 1 0 1 1 1 0 1 1 0 1 1 0 0 1 1 1 0 0 0 0 1 1
5
1 0 1 0
0 0 1 1 0 1 0 1 0 0 1 0 0 0 1 0 1 1 1 0 1 1 0 1 1 0 0 1 1 1 0 0
6
0 1 1 0
1 1 0 0 0 0 1 1 0 1 0 1 0 0 1 0 0 0 1 0 1 1 1 0 1 1 0 1 1 0 0 1
7
1 1 1 0
1 0 0 1 1 1 0 0 0 0 1 1 0 1 0 1 0 0 1 0 0 0 1 0 1 1 1 0 1 1 0 1
8
0 0 0 1
1 0 0 0 1 1 0 0 1 0 0 1 0 1 1 0 0 0 0 0 0 1 1 1 0 1 1 1 1 0 1 1
9
1 0 0 1
1 0 1 1 1 0 0 0 1 1 0 0 1 0 0 1 0 1 1 0 0 0 0 0 0 1 1 1 0 1 1 1
A
0 1 0 1
0 1 1 1 1 0 1 1 1 0 0 0 1 1 0 0 1 0 0 1 0 1 1 0 0 0 0 0 0 1 1 1
B
1 1 0 1
0 1 1 1 0 1 1 1 1 0 1 1 1 0 0 0 1 1 0 0 1 0 0 1 0 1 1 0 0 0 0 0
C
0 0 1 1
0 0 0 0 0 1 1 1 0 1 1 1 1 0 1 1 1 0 0 0 1 1 0 0 1 0 0 1 0 1 1 0
D
1 0 1 1
0 1 1 0 0 0 0 0 0 1 1 1 0 1 1 1 1 0 1 1 1 0 0 0 1 1 0 0 1 0 0 1
E
0 1 1 1
1 0 0 1 0 1 1 0 0 0 0 0 0 1 1 1 0 1 1 1 1 0 1 1 1 0 0 0 1 1 0 0
F
1 1 1 1
1 1 0 0 1 0 0 1 0 1 1 0 0 0 0 0 0 1 1 1 0 1 1 1 1 0 1 1 1 0 0 0
Bit-to-
Symbol
Symbol
-to-Chip
Symbol
Pulse
Shaping
Symbol
Modulated
Signal
Binary
Data
(b
0
,b
1
,b
2
,b
3
,b
4
,b
5
,b
6
,b
7
,b
8
,•••)
(b
0
,b
1
,b
2
,b
3
)
(b
4
,b
5
,b
6
,b
7
)
••••••
(c
0
,c
1
,•••••,c
30
,c
31
)
(c
0
,c
1
,•••••,c
30
,c
31
)
••••••
Quadrature
Modulator
Symbol