Coherent Self-Superposition Aided SSB Nyquist 16QAM Synthesis from Twin-SSB Nyquist QPSK with Reduced DAC Resolution Requirement

Abstract

An FWM-based coherent self-superposition technique is proposed and demonstrated to synthesize 12.5-Gb/s SSB Nyquist 16QAM from Twin-SSB Nyquist QPSK, which effectively relaxes DAC resolution requirement. An equalization algorithm is also proposed for such approach's detection.