电力载波通信中强背景噪声下弱信号的混沌振子检测方法与研究

利用混沌振子可以检测微弱的信号，并且具有很多优点。本文根据混沌微弱信号检测的原理，提出了将duffing混沌振子应用到三态脉冲位置调制信号检测中, 检测过程首先调节系统的策动力 ，使系统处于从混沌状态向大周期状态过渡的临界状态，此时系统的策动力阈值为 ，其相轨迹仍是混沌的，当三态脉冲信号加入系统后，系统从混沌态转变为大尺度周期状态，则检测出输入信号中包含有周期信号；如果系统继续处于混沌状态，则说明输入信号为纯噪声；最后通过相干提取包络识别系统状态,从而实现三态脉冲信号的检测。仿真结果表明了文中所提方法的可行性和有效性。

Weak signal of the chaotic oscillator detection methods and research in strong background noise of power line communication

chaotic oscillator could detect extremely weak signals, and has many advantages. Weak signal detection based on the chaos theory put forward a chaotic oscillator duffing applied to the triple-state pulse position modulation signal detection in this paper, first of all the driving force was adjusted in the detection process, and made the system in the critical state of from a chaotic state to the big cycle, at this point the threshold of the system driving force was ,and the phase trajectory was still chaos, when the triple-state pulse signal was added in the system, the system turned into a state of large-scale cycles from chaotic state, was detected a periodic signal in the input signal; if the system continued to be at a chaotic state, it indicated the input signal was the pure noise; finally the signal envelope was extracted through coherent detection and achieved the triple-state pulse signal detection. The simulation results shown that the method referred in the text was the feasibility and effectiveness.