摘要
为了在含有噪声的短时间Duffing时间序列中较快地估计出其信噪比,采用建立基于Duffing时间序列的重构相空间,计算与含噪时间序列有关的轨迹平均分离距离这个统计量,研究含噪信号的信噪比(SNR)与轨迹平均分离距离(ADD)的关系,找出一种有效的估计方法。通过数据拟合发现ADD随SNR指数衰减,经仿真验证,估计出的信噪比相对误差不超过1%,这对于微弱信号的检测具有积极的意义。
In order to evaluate the Signal to Noise Ratio （SNR） quickly in the Duffing time sequence which contains noise, reconstructed phase space,which is based on Duffing time sequence,is adopted to overcome the difficulty. Calculate the statistics which is got from Average Divergencing Distance （ADD）,then studing the relationship between SNR and ADD,finding a kind of effective evaluated method. Through the data imitation,the result is that ADD attenuates with SNR in the style of exponent. Through the simulation verification,proportional error of the evaluated SNR is no more than 1%, It is very important to detect weak signal in the field of signal disposal.
出处
《现代电子技术》
2008年第5期22-24,共3页
Modern Electronics Technique
