differential encoding

Differential encoding: Encoding in which signal significant conditions represent binary data, such as "0" and "1", and are represented as changes to succeeding values rather than with respect to a given reference. Note: An example of differential encoding is phase-shift keying (PSK) in which the information is not conveyed by the absolute phase of the signal with respect to a reference, but by the difference between phases of successive symbols, thus eliminating the requirement for a phase reference at the receiver. Source: from Federal Standard 1037C

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db(a)
dbm
dbrn
data circuit terminating equipment
decollimation
decrypt
degradation
degree of isochronous distortion
degree of start stop distortion
dejitterizer
delay

delay encoding
delay line
delta modulation
demand assignment
demand factor
demand load
desensitation
design objective
detector
deterministic routing
d 4

pulse dialing
dial up
dielectric
dielectric strength
differential manchester encoding
diffraction grating
digital access and cross connect system
digital filter
digital milliwatt
digital multiplex hierarchy
digital signal 0

digital subscriber line
digital transmission group
digitizer
digroup
direct access
direct connect
direct distance dialing
directional coupler
directive gain
direct sequence spread spectrum
disengagement originator