针对相关延迟移位键控混沌通信系统中相邻比特之间相互干扰导致误码率高的缺点,提出了一种基于量子密钥分配协议的Hadamard码相关延迟移位键控混沌通信方案。 在系统发射端,参考信号是经Hadamard函数扩频的混沌信号,发送信号是参考信号、延迟信号和数据调制信号的和信号,系统延迟时间由量子协议分布确定。 仿真结果表明,由于Hadamard函数的正交性,该系统可以很好地消除相邻位之间的相互干扰,并保持原有相关延迟移位键控的优点如混沌通信方案,降低系统误码率等。 此外,该系统具有高安全性的量子密钥分配协议。

For the shortcomings of correlation delay shift keying chaotic communication system, mutual interference between the adjacent bits leads to high bit error rate, a Hadamard code correlation delay shift keying chaotic communication scheme based on quantum key distribution protocol is proposed. In the system transmitter, the chaotic signal through Hadamard function for spreading spectrum is used as reference signal, and the sent signal is a sum of the reference signal, delay signal and data modulation signal, and the system delay time is determined by quantum protocol distribution. Simulation results show that because of the orthogonally of Hadamard function, the proposed system can well eliminate the mutual interference between adjacent bits and keep the advantages of original correlation delay shift keying, such as chaotic communication scheme, reducing system bit error rate. Moreover, the proposed system has quantum key distribution protocol with high security.