A DCSK Communication Scheme Based on Time Reversal Reference Signal Modulation
To address the problems of low information transmission rate and lack of security in the DCSK system,a time reversal reference signal modulated DCSK(TR-RM-DCSK)communication system scheme is proposed to improve the bit transmission rate and security.This scheme uses RM modulation to transmit two bits in a frame time slot.The chaotic signal carrying even information bits is not only an infor-mation signal,but also a reference signal for transmitting odd information bits.The reference signal is time reversed,the correlation between the same frame time slot signals is eliminated,thereby bit transmis-sion rate and signal security are improved.The theoretical bit error rate under Gaussian channel is derived,and performance simulation analysis is conducted on both Gaussian and Rician channels.The results show that this scheme improves error rate performance and improves system security without sacri-ficing transmission rate.
differential chaotic shift keying(DCSK)time reversalreference signal modulationerror code performance
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