Analysis and Compensation of Phase Noise in Mm-Wave OFDM ARoF Systems for Beyond 5G

Abstract

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Highly Tunable Heterodyne Sub-THz Wireless Link Entirely Based on Optoelectronics

“…This behavior has already been studied, and it is produced due to the interferometer formed by the arrangement of the system [29]. These results show that the phase noise behavior of the produced signal is largely determined by the length unbalance between the two arms of the system and the electrical source [28], [29]. This is the author's version of an article that has been published in this journal.…”

“…The power of the signal at this point is low, but an increment in the phase noise level is observed. This increase appears because the two optical components used for photomixing propagate through separate optical fibers with different lengths [28]. Two additional peaks appear at 24 kHz and 100 kHz, which are attributed to the filtering and the control loop of the EDFA in one of the two lines.…”

Bidirectional mm-Wave ARoF Fronthaul over Multicore Fiber for 5G and Beyond

“…A way to avoid the need of using the EDFA in the downlink is by performing another technique for the two-tone generation with high-power output rather than the employed external modulation method [9]. However, most of the high-power two-tone generation techniques contains higher phase noise levels which extremely deteriorates the performance when 5G numerologies are employed [8], [12]. Lastly, regarding Fig.…”

Experimental ARoF System Based on OPLL Mm-Wave Generation for Beyond 5G

“…However, since mm-Wave signals present high free-space path loss (FSPL), the number of mm-Wave remote units (RUs) will be much larger than in the current mobile network. Then, analog radio-over-fiber (ARoF) technology arises as an adequate solution for the beyond 5G fronthaul since it offers interesting benefits such as low latency, low complex RUs, and efficient spectrum usage [1,2]. Hence, ARoF enables a scalable deployment of the mm-Wave RUs for the future 5G architecture.…”