20-Gb/s QPSK W-band (75-110GHz) wireless link in free space using radio-over-fiber technique

Abstract

Abstract:We demonstrate 20-Gb/s W-band wireless transmission in free space with a distance of 30 mm using optical signal generation. Optically synthesized QPSK signal and direct optical upconversion technique ease generation of W-band RoF signals for dual purpose of wireline and wireless transmission link. A W-band radio receiver with W-band frequency downconversion and digital signal processing will be applicable for any W-band radio detection.

100 Gbit/s hybrid optical fiber-wireless link in the W-band (75–110 GHz)

“…More advanced modulation formats in the W-band such as differential phase shift-keying (DPSK), binary/quadrature phase shift-keying (BPSK/QPSK) with data rates of 10 Gbit/s and 20 Gbit/s are reported in [6][7][8]. Most recently, 40 Gbit/s 16-level quadrature amplitude modulation (16-QAM) wireless transmission in the W-band is presented [9].…”

Autonomous self-healing technique utilizing a self-injection-locked Fabry-Perot laser for optical and wireless communication systems

“…Optical fiber failures are likely to occur at specific sections such as paths along bridges, embankments and cliffs, and therefore, wireless back-up links preliminarily installed at the specific sections can rapidly recover failed links. Radio-over-Fiber (RoF) is one of the promising technologies because it has a capability of optical and wireless seamless transmission [3,4]. From this perspective, we study a RoF-based optical and wireless communication system with rapid recovery capability against disasters.…”

42.13 GBIT/S 16QAM-OFDM PHOTONICS-WIRELESS TRANSMISSION IN 75-110 GHz BAND

“…In the 60 GHz band, OFDM technique has already been used to realize 27 Gbit/s [11] and 28 Gbit/s [12] 16-quadrature amplitude modulation (QAM)-OFDM fiber-wireless links with coherent optical up-conversion at a modulator. In the W-band, quadrature phase-shift keying (QPSK) and 16-QAM have also been used to achieve 20 Gbit/s [13] and 40 Gbit/s [14] wireless links. So far, no high speed OFDM W-band wireless transmission system has been reported.…”

“…So far, no high speed OFDM W-band wireless transmission system has been reported. In these reported 60 GHz band and W-band schemes, hybrid photonic-electronic up-conversion (coherent method) is used to generate the high wireless carrier frequency, and 2.5 m wireless transmission with achieved performance slightly above the forward error correction (FEC) limit in [11] and 30 mm wireless transmission with achieved performance below the FEC limit in [13,14] are demonstrated. Recently, a photonic up/down-conversion (incoherent method) with RF/bit-rate transparency has also been proposed for a 40 Gbit/s OFDM W-band system without air transmission [15].…”