Chaotic Constellation Shaping Synchronization Header Assistance Cognate Coherence OFDM-FSO Communication

We propose an orthogonal frequency division multiplexing - free space optical - chaotic constellation shaping (OFDM-FSO-CCS) scheme based on synchronization header assistance. The redundant information of constellation shaping is converted into a binary bit stream. The bit stream is encrypted by using a pseudo-random binary sequence (PRBS) generated by the 1-dimensional chaotic map amplifier (1-DCMA). This encrypted redundant information is inserted into the synchronization header. The proposed scheme enhances transmission security and reduces the bandwidth occupation of redundant information. Experimental results demonstrate an approximate 0.8dB bit error ratio (BER) performance improvement at 3.8×10
⁻³
, compared with the original model.