Real-Time Intra-Symbol Two-Stage Bit-Class Distribution Matcher-Based PS-64QAM DMT Transceiver for W-Band Wireless Transmission

The utilization of probabilistic shaping (PS) techniques effectively mitigates the average power of the transmitted signal by optimizing modulation mapping schemes, which helps to improve the resistance of the wireless transmission system to the nonlinear effect induced by envelope detection. In this work, we have experimentally demonstrated FPGA-based real-time photonics-assisted W-band with envelope detection 23 Gb/s PS 64-ary quadrature amplitude modulation (64QAM) discrete multi-tone (DMT) signals over 40.5-m wireless link. In addition, an intra-symbol two-stage bit-weighted distribution matching-based PS-64QAM scheme was implemented based on FPGA to alleviate nonlinear damage caused by envelope detector. This PS-64QAM scheme has the advantages of no complex multiplication, division operations and low hardware implementation complexity. According to experimental results, by adopting our proposed PS-64QAM scheme, the receiver sensitivity can be significantly improved. This study demonstrates the attainment of the greatest wireless range to date through FPFA-based real-time photonics millimeter wave envelope detection for wireless communication. The results underscore the feasibility of integrating millimeter wave photonics, electronics, and advanced DSP algorithms to accomplish high-speed wireless communication over long distances in real time. This will provide important assistance for our future work in real-time photonics- assisted millimeter wave wireless communication.