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在差分混沌键控方案中 ,由于混沌信号是非周期的 ,因而相关解调时得到每信息比特的能量不是恒定值 ,即解调结果在无噪声干扰情况下也会存在偏差 ,从而影响通信系统的抗噪声性能。本文提出将混沌多相序列引入到差分混沌键控方案中 ,利用混沌多相序列的统计特性可有效解决相关解调时的偏差问题。文中给出了一类混沌多相序列的生成方案 ,以及该通信系统的误码特性表达式。
In the scheme of differential chaos keying, since the chaotic signal is non-periodic, the energy per information bit obtained by the demodulation is not constant, that is, the demodulation result will also have a bias in the case of no-noise interference, thus affecting the communication system’s Anti-noise performance. In this paper, the chaotic multiphase sequence is introduced into the scheme of differential chaos keying, and the statistical properties of the chaotic multiphase sequence can be used to solve the problem of deviation in the correlation demodulation. In this paper, a class of chaotic multiphase sequence generation scheme and the expression of the error characteristics of the communication system are given.