Abstract: A pseudo-code phase estimation method is presented which attempts to deal with the emergence of multi-peak signals and the defect of traditional phase-estimation, especially its inablility to extract the main peak of multi-peak signals, and large phase estimation errors in non-integer sampling conditions.The new method improves the accuracy of multi-peak signals.First, the ambiguity caused by vice-peak is removed by frequency domain abstract processing, and the purpose of extracting main peak is achieved.Second, an interpolation equation is established to improve the phase estimation accuracy.On this basis, validation and assessment are conducted, and the results show that this estimation method can accurately extract the main peak of multi-peak signals, and improve phase estimation accuracy significantly as compared with traditional methods.

Key words: multi-peak, signal, pseudo-code, main peak, estimation