Time reversal based channel self-adaptive OFDM in complex environment

This paper presents a novel scheme of orthogonal frequency division multiplexing (OFDM) transmission link combined with the time reversal technique, which is recently believed as a promising self-adaptive technique to enhance the wireless transmission due to the special characteristics: spatial focusing and temporal focusing. The proposed time reversal based OFDM system could combat against the multi-path effect and inter-symbol interference through the efficient energy capture by introducing the equivalent time reversal channel impulse response. The transmission model is discussed and numerical simulation is carried out to investigate the performance improvement of the time reversal based OFDM scheme. More importantly, its robustness in harsh environment application is also proved.