Cost-effective IFDMA-PON Enabled by Bidirectional Long Short-Term Memory

Interleaved frequency division multiple access (IFDMA) is considered as a promising candidate for next-generation optical access networks. In this paper, we proposed a bidirectional long short-term memory (BiLSTM)-based detection method for IFDMA-PON. The performance of the BiLSTM-based method was evaluated with varying modulation formats and laser linewidths. The results showed that BiLSTM could detect system impairments more effectively with higher tolerance for nonlinear distortion of the transmitter than traditional least square-based methods.