Experimental Comparison of 32- and 64-QAM Constellation SHapes on a Coherent PDM Burst Mode Capable System
18 September 2011
By introduction of an OFDM-based, data independent synchronization symbol, we implement a burst mode capable coherent transmission system. Experimental comparison of differently shaped 32-/64-QAM-constellations show a benefit up to 3dB in OSNR-sensitivity for round patterns. OCIS codes: (060.1660) Coherent communications, (060.4080) Modulation
