摘要
提出一种正弦信号频率估算的快速迭代算法,它可以保证在不知信号频率的确切值的情形下在2个周波内以0.1%的测量准确度来估算信号频率的实际值。本算法是一个迭代计算过程,仅利用一个采样周期信号采样序列值中的任何两个相邻的采样值,并通过构造信号幅值、频率和相位与这两个采样值有关的影响系数来实现。在迭代计算中,通过设定不同数值的迭代系数,可以在不同的计算时间内获得不同的估算精确度。并给出一个实际应用系统的实例计算,仿真结果证明这种算法的可靠性、准确性和快速性。
An iterative fast algorithm for sinusoidal signal frequency estimation is presented in this paper.The algorithm guarantees to estimate the signal frequency at a measurement accuracy of 0.1% within 2 cycles with undetermined real-time value of signal frequency.The algorithm is a iterative method which is carried out with any two sampling values among sequences in a sampling period and via formation of 2 influencing factors of amplitude,frequency and phase concerned with the corresponding one of sampling values.One of the main factors influencing calculation speed and estimation accuracy is enactment of iterative factors.The testing results and the data of practical application system prove its reliability,veracity and celerity of this algorithm.
出处
《化工自动化及仪表》
CAS
北大核心
2003年第5期59-61,64,共4页
Control and Instruments in Chemical Industry
关键词
频率估算
迭代算法
自适应测量
信号参数
frequency estimation
iterative algorithm
adaptive measurement
signal parameters
