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This paper proposes a novel method to enhance the performance of themodulator for fifth-generation wireless communication (5G) by exploitingmodulation instability (MI). We show that MI can reduce the bias voltage of themodulator ($V_\pi$) by generating carrier side-band gain, and increase themodulation BandWidth (BW), resulting in higher channel capacity, withoutchanging the modulator structure. In receive mode of the array antenna, wherethe signal is very weak, high-frequency amplification is a high demandingsolution to mitigate coverage issue.  We also present a developed microwave-photonic beamforming bit-controllersystem for receiver-transmitter phased array antennas (PAAs), which areessential for high-capacity wireless communications like 5G. We employ amodulated frequency comb exploiting MI fiber to achieve an amplified true-timedelay (TTD) technique for wide-coverage PAA beamforming and show that it cansteer wideband high-frequency signal to a specific direction angle, avoidingbeam-squint.

Performance Improvement of True Time Delay Based Centralized Beamforming  Control with the Modulation Instability Phenomenon for Wireless-Array  Antennas