10-Gb/s wireless signal transmission over a seamless IM/DD fiber-MMW system at 92.5 GHz

Abstract

In this paper, we propose a high-speed wireless signal transmission over a simple analog intensity modulation/ direct detection (IM/DD) fiber-millimeter-wave (MMW) system at 92.5 GHz. The system employs a frequency and phase stabilized optical MMW signal generation at transmitter and a simple direct detection at receiver. We confirm a successful transmission of 10-Gb/s 16-QAM OFDM-based wireless signal over a seamless 8-km SMF and 27-cm 92.5-GHz wireless system. To further increase the fiber transmission range, we use a simple adaptive modulation approach. Successful transmission over 10-km single mode fiber (SMF) system is confirmed for a 8.1 Gb/s wireless signal using both 16-QAM and QPSK modulation. We also estimate the maximum transmission range for the MMW link, and it is proved that a transmission over a 1-km MMW link can be achieved. Both the confirmed fiber length and estimated MMW range are sufficiently long for future mobile front-haul systems in nextgeneration wireless networks. The system therefore can provide a high-speed, low-latency, and flexible solution for front-hauling in new emerging wireless systems such as 5G mobile networks.Index Terms-Millimeter-wave (MMW) communications, radio-over-fiber (RoF), orthogonal frequency division multiplexing (OFDM), mobile front-haul, small-cell networks, seamless fiber-millimeter-wave system.

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“…In this measurement, the cyclic prefix was fixed to oneeighth of the symbol period. All signal transmissions satisfy the EVM requirement for 16-QAM OFDM signals, which is approximately 14.84% for the bit error rate below the forward error correction limit of 2.2 × 10 −3 [27]. However, the signal performance for the transmission over the 30-km-SMF system was relatively degraded because of the interaction between the phase noise of the tunable laser and the fiber dispersion effect [28].…”

On the Performance of Cellular Networks with Adaptive Modulation and Energy Harvesting—A Stochastic Geometry Approach

“…Moreover, the transmit power of the secondary transmitter was computed in [13]. On the other hand, the performance of the combination of optical communications and wireless communications was conducted in [14] where RF signals are seamlessly transmitted through both fiber and mmWave. The impact of hardware impairment in UAV-NOMA-based systems was investigated in [15].…”