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DPSKDifferential Phase Shift Keying
DPSKDigital Phase Shift Keying
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* Differential phase shift keying (DPSK) codes the bit information into the phase of the optical signal, providing a 3 dB higher OSNR sensitivity than duobinary modulation, but receiver costs rise;
Inphi's 13750DE/13751DE Differential Encoder is said to be the first commercially available single-chip encoder to provide up to 12.5 Gbps Differential Phase Shift Keying (DPSK) or Duobinary transmission.
The transmission breakthrough was made possible using the differential phase shift keying (DPSK) method, a new coding scheme for high-capacity communications developed at Bell Labs.
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