Figure 2.16 Symbol Cutting From Bytes
m = 8
Byte N
Byte N + 1
Byte N + 2
b7 b6 b5 b4 b3 b2 b1 b0
b7 b6 b5 b4 b3 b2 b1 b0 b7 b6 b5 b4 b3 b2 b1 b0
m = 4
b3 b2 b1 b0 b3 b2 b1 b0
b3 b2 b1 b0 b3 b2 b1 b0
Symbol t Symbol t + 1
b3 b2 b1 b0 b3 b2 b1 b0
Symbol t + 2 Symbol t + 3
Symbol t + 4
Symbol t + 5
m = 6
b5 b4 b3 b2 b1 b0 b5 b4 b3 b2 b1 b0 b5 b4 b3 b2 b1 b0 b5 b4 b3 b2 b1 b0
Symbol t Symbol t + 1
Symbol t + 2
Symbol t + 3
The general control unit feeds packets of eight bytes and a valid indicator
to the convertor. Thus, the conversion is as shown in Figure 2.17.
Figure 2.17 Byte to Symbol Conversion
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
m = 4
m = 6
Bit 3
Bit 2
Bit 1
Bit 0
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
m = 5
m = 7
Time
Time
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Byte-to-Symbol
Conversion
m = 8
Bytes to M-tuples Converter
2-25
ETC [ ETC ]
