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A spectrum-efficient MIMO-enhanced 60-GHz RoF system based on optical TDM has been demonstrated. It consists of two QPSK-OFDM MIMO channels with a simple TDM network design as a practical solution for mm-wave MIMO-based wireless communications.
For the first time, bidirectional multi-band multi-gigabit wireless-over-fiber transmission at 60-GHz mm-wave band has been accomplished with centrally supplied LO service. It does not require mm-wave LO devices in each base stations and mobile terminals.
We demonstrate for the first time a polarization-multiplexed multiple-input multiple-output radio-over-fiber system with direct-modulation and envelope-detection architectures. Based on blind equalization techniques, cross-channel interferences in both optical fiber and wireless channels are cancelled simultaneously without incurring additional overhead.
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