基于共轭-旋转矢量不变性技术的谐波检测方法

Harmonic Detection Method Based on Conjugate Signal Parameters via Rotational Invariance Techniques

本文提出了将一种阵列信号处理方法即共轭-旋转矢量不变性技术(C-SPRIT)应用于谐波、间谐波检测。该方法结合实值信号共轭与自身值相等的特点,利用旋转因子共轭矩阵代替旋转因子做阵列信号处理,采用总体最小二乘法减小噪声信号的影响,从而准确提取出谐波参数。理论分析和仿真实验表明该算法精度高、抗噪性强,实际数据分析表明该算法有效可行,具有一定的应用前景。

In this paper,a new algorithm conjugate signal parameters via rotational invariance techniques to estimate the frequency of the harmonics is presented.The C-SPRIT employs all element outputs to form separate sub-arrays which are fully overlapped.It uses the conjugate of rotation matrix instead of rotation matrix in array signal processing.The total least squares（TLS） is also employed here to decrease the influence of noise.The simulation examples demonstrate that the algorithm is capable of having higher precision and stronger anti-noise capacity.Real-time data analysis shows that the algorithm is feasible and available.It has some prospects in future.