Abstract:

Orthogonal frequency division multiplexing (OFDM) is a modulation technique which is now used in most new and emerging broadband wired and wireless communication systems because it is an effective solution to inter symbol interference caused by a dispersive channel.Very recently a number of researchers have shown that OFDM is also a promising technology for passive optical network.The transmission performance of the OFDM-PON system and its dynamic bandwidth allocation algorithm are studied in this paper.The improved algorithm is put forward based on the traditional CP algorithm,achieving upstream bandwidth allocation performance of OFDM-PON system.Modeling and simulating show that both system upstream traffic delay and link utilization are improved.

Key words: OFDM-PON;dynamic bandwidth allocation;CP algorithm;Qoc