Analysis of BER performance of frequency domain differential detection OFDM system in multipath fading channels

Bit error rate (BER) performance of orthogonal frequency division multiplexing (OFDM) system in multipath fading channels using the frequency domain differential detection (FDDD) was analyzed, and the results were evaluated by simulation. The BER performance of FDDD was affected by both coherent bandwidth and coherent time of the channel, but the BER performance of FDDD is more sensitive to the change of coherent bandwidth, FDDD can be used to the multipath fading channel with shorter delay spread.