p/8 D8PSK (Digital Demod)
(Differential 8 PSK Phase Shift Keying: A broad classification of modulation techniques where the information to be transmitted is contained in the phase of the carrier wave.) is a differential modulation format where the bits for a given symbol are determined by the phase change from the previous symbol. p/8 D8PSK is the same as D8PSK with a p/8 rotation between each symbol. This leads to a physical 16PSK constellation. Due to this rotation the ideal trajectory between symbols never crosses through zero.
The phase transitions for Pi/8 D8PSK modulation are:
|
Transmitted Bits |
Phase Transitions |
|---|---|
|
000 |
+p/8 |
|
001 |
+3p/8 |
|
101 |
+5p/8 |
|
100 |
+7p/8 |
|
010 |
-p/8 |
|
011 |
-3p/8 |
|
111 |
-5p/8 |
|
110 |
-7p/8 |
The phase transition to bit mapping may be modified using a custom state definition file. See About State Definition.
See Also
