DNN-assisted phase distance tuned PSK modulation for PAM4-to-QPSK format conversion gateway node

Abstract

An optical gateway to convert four-level pulse amplitude modulation to quadrature phase shift keying modulation format having shaping gain was proposed for flexible intensity to phase mapping which exploits non-uniform phase noise. The power consumption of the optical modulation format conversion can save by making a DNN-based decision on the receiver side for the generated QPSK signal with non-uniform phase noise. A proof-of-principle experiment has shown that an optically geometric constellation shaped QPSK modulated signals generated from regular PAM4 signals with Gaussian-distributed noise. The shaped QPSK signal shows BER and generalized mutual information improvement by 1dB gain through the use of digital neural network signal recovery.

Design of Enterprise Economic Management Intelligent Terminal for Big Data Application

“…e data collected by the terminal node can be uniformly transmitted to the gateway node so that it can exchange with the external Internet. At the same time, the gateway node can also accept the response instructions to realize the routing and forwarding function of data [26,27]. When the Internet of ings is established, the gateway node can be placed flexibly according to the needs.…”