Effective throughput 1 Gbps-class millimeter-wave wireless system

Abstract

In preparation for achieving the millimeter-wave broadband wireless system aimed at seamless connection with the optical network, we have developed key devices such as baseband signal processing SoC (System-On-Chip) with the built-in high-speed multi-level QAM (Quadrature amplitude modulation) modem (modulator and demodulator), SiGe (silicon germanium) I/Q quadrature modulator and demodulator MMIC (Microwave Monolithic Integrated Circuit), and GaAsHEMT (gallium arsenide high electron mobility transistor) frequency converter MMIC. We have also prototyped the small and broadband 38 GHz band point-to-point wireless system using TDD (Time Division Duplex) mode with dynamic radio resource control. Then, the maximum effective throughput on 64QAM has been 1 Gbps, and this system has reached to the stage of field trial.