BER Performance Analysis of O-OFDM-IM System Under Non-ideal Conditions

In this paper, the effects of atmospheric turbulence, aiming error, frequency offset, and channel estimation error on the communication performance of the optical OFDM-IM system are investigated, and an expression for the average BER of the optical OFDM-IM system under this non-ideal condition is derived. Finally, simulation experiments are used to verify the results. The results show that under the same conditions, the reliability of the system becomes less and less as the turbulence intensity, frequency offset, and channel estimation error increase.