Novel Delay-Division-Multiplexing OFDMA Passive Optical Networks Enabling Low-Sampling-Rate ADC

Abstract

Without extra hardware, the proposed delay-division-multiplexing scheme reduces sampling rate and FFT size at ONUs in OFDMA-PONs to 1/2 similar to 1/32 of conventional ones. Sending preprocessed signals, various aliasing-free subcarriers can be received dynamically by controlling delays.