based on fractal box dimension feature of signals, this paper presents a spectrum sensing method employing the difference of fractal box dimension be tween noise and licensed signals.
在信号分形盒维数特征的基础上,提出利用噪声与授权信号分形盒维数的差异对授权 用户是否存在进行检测。
the results show that this approach is fast, exact, credible and can get the fractal box dimension of watershed topography of different scope.
结果表明,该方法快速、準确、数据可靠,可实现不同尺度流域地貌形态分形盒维数的测定。
the definition of short-time fractal box dimension and the fuzzy control function of the filter are discussed.
讨论了滤波器中时间序列的短时分形盒维数的定义及分形模糊控制函数形式及选用方式。
the frequency-magnitude response of the fractal filter and the change of fractal box dimension of white noise and color noise are analyzed.
分析了一阶分形模糊控制滤波器的频率-幅度特性,白噪声和有色噪声分形盒维数的变化;