Flexible bandwidth allocation strategies in a statistical OFDM-PON are experimentally shown to compensate for differential link loss allowing for proper detection of ONUs separated up to 55km (11.4dB)
Cano, I. [et al.]. Differential link-loss compensation through dynamic bandwidth assignment in statistical OFDMA-PON. A: Optical Fiber Communication Conference and Exposition and National Fiber Optic Engineers Conference. "Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC)". Barcelona: 2013, p. 1-3.