Chaotic Maps: A Tool to Enhance the Performance of OFDM Systems

This paper presents a chaotic interleaving approach for efficient data transmission with orthogonal frequency division multiplexing (OFDM) over fading channels. The binary data is interleaved with the proposed approach prior to the modulation step. The chaotic Baker map is used in the proposed interleaving approach. In addition to reducing the channel effects on the transmitted data, the proposed chaotic interleaving approach adds a degree of encryption to the transmitted data. The performance of the proposed approach is tested by the transmission of images over Rayleigh fading channels with chaotic interleaving. Experimental results show that images are received with higher peak signal to noise ratios (PSNRs) if chaotic interleaving is applied.