Browsing by Author "Shih, Boris"

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Direct-Detection PDM-OFDM RoF System for 60-GHz 2 x 2 MIMO Wireless Transmission Without Polarization Tracking
(2018-09-01)
Huang, Hou-Tzu
;
Sun, Chung-Shin
;
Lin, Chun-Ting
;
Wei, Chia-Chien
;
Zeng, Wei-Siang
This work experimentally demonstrates a 60-GHz direct-detection polarization division multiplexing and orthogonal frequency division multiplexing (PDM-OFDM) system that does not require polarization tracking. The frequency offset of un-modulated optical carriers and a novel training symbol design enable the estimation of optical polarization mixing and wireless multi-input-multi-output (MIMO) channels for signal demodulation. We also adopted an empty subcarrier to mediate noise enhancement. Simulation and experiment results both demonstrate the feasibility of this approach. With pre-compensation, we achieved a BER of 1 x 10(-3) under all polarization states over 10-km fiber and 3-m wireless MIMO transmission. The maximal allowable transmission data rate of up to 52 Gb at the worst case of states of polarization can he achieved.