摘要
对现有的进动周期提取方法进行了研究,分析了周期提取函数的特性,针对其容易造成分频和倍频错误的问题,提出了一种基于修正的双重平均幅度差函数的周期提取方法。该方法利用了传统周期提取函数随步长增加而衰减的特性,使处理后的结果只有一个峰值,从而克服了分频的影响,并且能够有效抑制噪声和倍频带来的干扰。仿真实验表明,该方法能够明显提高周期估计的精确性和稳定性。
After the research of current precession period extraction methods and functions,a new period extraction method is put forward based on amendatory DAMDF function aiming at solving the frequency demultiplication and frequency multiplication problem.Taking the advantage of the attenuation character of traditional functions,this method just has only one peak,so it overcomes the frequency demultiplication and frequency multiplication problem as well as the interference of noise.Simulations show that this method can improve the precision and stability vastly.
出处
《现代雷达》
CSCD
北大核心
2014年第11期62-66,共5页
Modern Radar
基金
国家自然科学基金资助项目(61273275
60975026)
