Showing papers by "Yuki Yoshida published in 2019"

Coherent Detection Only by 2-D Photodetector Array: A Discreteness-Aware Phase Retrieval Approach

Abstract: A simple and spatially-flexible coherent receiver without local lights, optical hybrids, or spatial de-multiplexers is experimentally demonstrated; 2×10-Gbaud SDM QPSK signals were detected only by 2-D arrayed photodetectors based on a novel phase-retrieving technique.

An Outdoor Evaluation of 1-Gbps Optical Wireless Communication using AlGaN-based LED in 280-nm Band

Abstract: The performance of solar-blind optical wireless communication using AIGaN-based LED at 280 nm-band was evaluated experimentally over a 1.5-m outdoor Line-of-Sight channel. Even under the summer sun, 1.18-Gbps error-free transmission was achieved. © 2019 The Author(s)

FPGA Demonstration of Adaptive Low-latency High-fidelity Analog-to-digital Compression for Beyond-5G Wireless-wired Conversion

Abstract: Time-domain analog-to-digital compression (ADX) is designed and implemented on FPGA for low-complexity high-fidelity wireless-wired signal conversion. We demonstrate 50ns processing latency and $EVM 30dB$ input power range for 4096QAM-modulated OFDM and single-carrier radio signals.

Experimental and Numerical Analysis of Eigenvalue Deviation in Optical Multi-Eigenvalue Modulated Signal Transmission

Abstract: We experimentally demonstrate 1,000 km SSMF transmission of optical multi-eigenvalue modulated signal. Moreover, we discuss the deviation of the eigenvalues due to fiber loss, third dispersion, and ASE noise in practical fiber transmission.

Integrated High-Speed Photodetector Array for SDM Communications

Abstract: We present a two-dimensional high speed photodetector array as a platform technology in receivers, and its applications in space division multiplexing fiber communications, digital coherent direct detection, and free space optical communications.