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Record wireless data transmission of 31.4 Gbps within 7 GHz license-free band at 60 GHz is experimentally demonstrated using adaptive bit-loading OFDM modulation. Adaptive bit-loading OFDM also enables extended fiber transmission distances beyond 5km.
This paper reviews 60-GHz radio-over-fiber systems employing optical frequency multiplication and adaptive OFDM signals with multi-level modulation formats to achieve an ultra-high data rate of up to 32.65 Gbps within the 7-GHz license-free band.
We experimentally demonstrated an adaptive I/Q imbalance correction scheme to compensate I/Q-imbalance. With I/Q correction, a 32.65-Gbps OFDM signal at 60 GHz within 7-GHz license-free band is successfully generated and, following 25km SMF transmission, negligible power penalty is observed.
A full-duplex bidirectional 60 GHz RoF system for in-building wireless applications employing DSB IMDD techniques is experimentally demonstrated. Symmetrical 2×21 Gbps transmission over 500-m standard single mode fiber and 2.5-m wireless distance is successfully achieved.
This paper demonstrates the feasibility of a simple multigigabit-per-second (Gbps) radio-over-fiber (RoF) system employing multilevel orthogonal frequency-division-multiplexing (OFDM) signal modulation at 60 GHz and a single-electrode Mach-Zehnder modulator (MZM). In this paper, the impact of fiber chromatic dispersion and OFDM beat noise on the performance of the RoF system are investigated by theoretical...
A simple double-sideband IMDD RoF system is successfully employed to directly transport a 21 Gbps OFDM signal at 60 GHz over 500 m of standard single-mode fiber and 10 m wireless distance.
A radio-over-fiber system with a simple architecture is used to transport a 14 Gbps OFDM signal occupying the full 60 GHz band. Fiber lengths exceeding 3 km are supported without any dispersion compensation.
We experimentally demonstrate 10-Gb/s OFDM-QPSK signal with negligible penalty following 100-km SSMF transmission within 7-GHz unlicensed band at 60-GHz for the first time. The proposed scheme proves to be a viable solution for long-reach 60-GHz RoF system.
5 Gb/s 16 QAM OFDM signal for ROF downstream link and 1.25 Gb/s OOK signal via RSOA for upstream link are demonstrated. Negligible penalty is observed after 25 km SMF.
Both highly spectral-efficient direct-detection 15-Gb/s 64-QAM and 20-Gb/s 16-QAM OFDM signals are demonstrated. Negligible penalty is observed following 25-km SMF transmission.
This investigation demonstrates the generation of OFDM-RoF signal using frequency doubling. Benchmarked against the OOK format, the 4-Gb/s, 16-QAM OFDM format has four times the higher spectral efficiency with a sensitivity penalty of under 2.6-dB.
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