Complexity-reduction for the Digital-filtered AWGR-based 2D IR Beam-steered OWC System by using Non-integer Oversampling

Digital Nyquist filtering improves the capacity of our 1 2.5-GHz channel-spaced 6-GHz bandwidth-limited AWGR-based 2D infrared beam-steered OWC system but introduces additional complexity. Experiments demonstrate the practicability of non-integer oversampling at 1.1× symbol rate with root-raised-cosine filtering to reduce data converter sampling rate and power consumption.