A new harmonic and inter-harmonic parameter estimation method

In order to reduce the influence of noise signals in harmonic and inter-harmonic analysis, a new method is proposed in this paper based on modern cross-spectrum, TLS-ESPRIT and improved prony techniques. The characteristics of noise signals of zero average value in the sampling period and being independent in different time are adopted to obtain the frequency, amplitude and initial phase of sub-signals. The proposed method has been applied conditioned upon low signal noise ratio, and the simulation results have shown that this new method can distinguish more sub-signals and are characterized by the high resolution capability and good stability.