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在具有去噪声模块的DCSK(differentialchaosshiftkeying)通信系统中 ,存在三种导致估值误差的因素 ,这三种因素分别来源于DCSK信号本身、加性信道噪声和去噪声模块 .经过对上述三种因素的分析 ,提出了一种新型的DCSK通信系统 ,该系统使用混沌多相序列 (CPS)避免DCSK信号本身带来的误差 ,同时采用相空间量子化的方法降低加性信道噪声的干扰 .仿真结果表明 ,虽然这种新型的DCSK通信系统因去噪声算法带来的误差而使其噪声特性略逊于FM -DCSK ,但是在CPU运算时间及系统结构上 ,该系统比FM -DCSK复杂性降低 ,易于实现
In DCS (differentialchaosshiftkeying) communication system with de-noise module, there are three kinds of factors that lead to the error of estimation, which come from the DCSK signal itself, additive channel noise and denoising module respectively.Through the above three factors , A new type of DCSK communication system is proposed. The system uses chaotic polyphase sequence (CPS) to avoid the error caused by DCSK signal and uses phase space quantization to reduce the interference of additive channel noise. Simulation results It shows that the new DCSK communication system has slightly lower noise characteristics than FM-DCSK due to the error caused by the de-noising algorithm, but the complexity of the system is lower than that of FM-DCSK in CPU operation time and system structure, Easy to implement