Safe communication system based on OFDM-PON multi-chaos scrambling

According to the secure communication system based on OFDM-PON multi-chaos scrambling, at a sending end, a signal generator is connected with a mapper, the mapper is connected to a serial-to-parallel converter through a chaos laser and the like in sequence, the mapper is further connected to an adder through two multipliers, and the adder is connected with the serial-to-parallel converter; the serial-to-parallel converter is connected with the IFFT converter, the output end of the IFFT converter is connected with the input end of the parallel-to-serial converter, the output end of the parallel-to-serial converter is connected with the photoelectric modulator through the pilot frequency and cyclic prefix importer, and the photoelectric modulator converts electric signals into optical signals; the optical signal is transmitted to an erbium-doped optical fiber amplifier at a receiving end through an optical fiber; at the receiving end, the erbium-doped optical fiber amplifier is connected with the input end of t