随机共振技术在弱随机二元码检测中的应用研究

Application Research of Detecting Weak Random Binary Code Based on Stochastic Resonance

分析了小信号条件下二维双稳Duffing系统的随机共振现象,提出基于Duffing系统随机共振技术的微弱随机二元码检测方法,此方法在不需要知道被检测信号的任何先验知识的条件下,检测微弱随机二元码信噪比可以达到-25dB以下,并可估计出信号波形,计算机仿真验证了该方法的有效性;为强噪声背景下微弱随机二元码的检测提供了一种操作性强、高效的方法。

The phenomenon of stochastic resonance based on two-dimensional bistable Duffing system under the conditions of small signal is analyzed in this paper; the detection methods of faint random binary code based on stochastic resonance technique of Duffing system is presented. Using this method, under the conditions of no knowing any priori knowledge of detection signal, the detected signal waveform can be estimated, what＇ s more, the ratio of signal to noise of detecting weak random binary code can be achieved -25dB below, and the computer simulation verifies effectiveness of the method. As a result, the research in the paper provides the a feasible and efficient method of weak random binary code detection under the conditions of Strong noise background.