METHOD & APPARATUS FOR DEMODULATING AN OPTICAL DIFFERENTIAL PHASE-SHIFT KEYING SIGNAL

摘要

Demodulating an optical Differential Phase-Shift Keying (DPSK) signal is accomplished using a self-homodyne receiver (402) for receiving the optical signal. A converter (404) converts the optical signal received by the self-homodyne receiver into a representative electrical signal. A processor (410) that processes the representative electrical signal using decision feedback multi-symbol detection in order to obtain a decision variable that indicates a differential phase-shift in the optical signal.