p/8 D8PSK (Digital Demod)

p/8 D8PSK (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

Setting up a Digital Demod Measurement

Available Digital Demodulation Formats