摘要
分析了Duffing振子对方波调制信号的敏感性,通过对方波调制信号检测过程中出现的间歇混沌现象的分析,推导出检测微弱DSSS信号的方法,仿真结果验证了该理论分析的正确性和所提方法可以检测出信噪比在-20dB以下的微弱DSSS信号的有效性,为DSSS信号检测提供了一种高效的新途径.
The sensitivity of Duffing oscillator to the square-wave modulation signal firstly analyzed in this paper. Through intermittent chaos phenomenon analysis which appears to the square-wave modulation signal detection process, the method of detecting weak DSSS signal is inferred, the simulation result has confirmed this theoretical analysis is accurate and the proposed method to be possible to examine below signal-to-noise ratio -20 dB the weak DSSS signal is validly. The result has provided one highly effective new way for the DSSS signal detection.
出处
《陕西科技大学学报（自然科学版）》
2010年第3期87-90,共4页
Journal of Shaanxi University of Science & Technology
基金
陕西省教育厅专项科研计划项目05JK159
