A novel modulation format identification based on amplitude histogram space
Tianliang Wang, Xiaoying Liu · Frontiers of Optoelectronics · 2018
In this paper, we proposed a novel modulation format identification method for square M -quadrature amplitude modulation ( M -QAM) signals which is based on amplitude histogram space of the incoming data after analog-to-digital conversion, chromatic dispersion compensation at the receiver. We demonstrated the identification of quadrature phase-shift keying (QPSK), 16-QAM, 64-QAM formats with an amplitude histogram space. Simulation results show that it achieve 100% identification accuracy when the incoming signal OSNR is 14 dB to identify the modulation format of QPSK, 16-QAM, and 64-QAM signals in digital coherent systems. The method has low complexity and small delay.