Link Performance Evaluation of 5G mm-wave and LiFi Systems for the Transmission of Holographic 3D Display Data

摘要

This paper presents an evaluation of link performance of a 5G millimetre wave (mm-wave) and a LiFi (light fidelity) system for the transmission of holographic 3D display data via over-the-air (OTA) links. In order to reduce the transmission payload the holographic data is compressed from 256-level gray scales to 8-level gray scales which results in the required transmission data throughout to be about 1.5 Gbps. The compressed data is then encoded and decoded through holographic encoding and decoding systems at the transmitting and receiving ends. The 5G mm-wave system is designed to operate at RF bands centered between 26.3 and 26.7 GHz with carrier aggregation to increase the throughput rate of the system using multiple vector signal transceiver modules. The LiFi system is designed to operate with four colors in the optical spectrum: red, green, blue, and yellow. Wavelength division multiplexing (WDM) is applied to efficiently modulate the four wavelengths to improve the link data rate. The current results show that, without forward error coding (FEC), the 5G mm-wave system is able to achieve a real-time data transmission rate of 0.6 Gbps with 16-QAM (quadrature amplitude modulation) with the symbol error rate of 0.22% over a 0.13 m wireless link, whereas, with FEC, the LiFi system is able to achieve a non-real-time data transmission rate of 15.7 Gbps with the bit error rate (BER) below 3.8x10^-3 over a 1.6 m wireless link.