Enhancement of Bit Error Rate using TDM OFDM in Passive Optical Network

Orthogonal frequency division multiplexing (OFDM), as the original form of various DSP methods with frequency-domain equalization (FDE), is chosen for both upstream and downstream transmissions.Accurate channel estimation is required for FDE. There are several FDE techniques are used to reduce the bit error rate (BER) and enhancement of transmission rate in combination with Orthogonal Frequency Division Multiplexing (OFDM). A hybrid TDM OFDM PON introduces a cost-effective, reliable and efficient access network. It can achieve maximum compatibility with current TDM-PON and achieves high spectral efficiency transmission over a fiber optic communication.