基于混沌理论的微弱MPSK信号解调方案设计
esign of Weak MPSK Signal Demodulator based on Chaos Theory
MPSK传统解调方案主要利用相干解调，然而在信噪比较低的环境中误码率较高。本文利用了混沌系统的对输入信号的敏感性特点，选取了典型混沌系统--Duffing系统，对微弱MPSK信号的解调方案进行了设计。根据MPSK信号相位对Duffing系统的不同影响，提出了基于Duffing振子列解调微弱MPSK信号的方案，并对振子数量选取、相位设计和判决规则进行了研究。最后利用MATLAB平台的Simulink模块，对解调方案进行了性能仿真，验证了此解调方案可以在信噪比为-18dB的情况下实现对微弱MPSK信号的解调，并且误码率较低。
raditional coherent demodulation of MPSK signal will lead to high BER in the low SNR condition. Using the characteristic of chaos system which is sensitive to the input signal, this paper designs a demodulator of the weak MPSK signal in low SNR. Taking advantage of the different effect of MSPK signal phase to the Duffing system, this paper put forward a method to demodulate the weak MPSK signal based on a row of Duffing oscillators and research the quantity and the phase of the Duffing oscillators. At last this paper simulates the demodulator based on MATLAB platform and proves that the method can demodulate weak MPSK signal under -18dB SNR.
冯志勇、张轶凡、马腾跃
通信无线通信电子技术概论
通信技术相移键控解调uffing振子
communication technologyMPSKdemodulationDuffing oscillator
冯志勇,张轶凡,马腾跃.基于混沌理论的微弱MPSK信号解调方案设计[EB/OL].(2015-03-27)[2025-08-02].http://www.paper.edu.cn/releasepaper/content/201503-385.点此复制
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