A new signal containing two sinusoidal signals is reconstructed from originally sampling signal by the method.Then based on the bispectrum analyses of the new signal,the phase is estimated accurately.

• 此方法在采样信号的基础上,重构出一路新的信号,该信号包含两个频率互成倍数的正弦波,再进行双谱分析,以实现正弦波初相的精确求解。