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高阶谱分析是信号处理领域的一种新方法，近年来得到迅速发展。本文介绍几种利用高阶谱知识恢复信号相位信息的非参数方法。
Higher order spectral analysis is a new method in the field of signal processing and has been rapidly developed in recent years. This article describes several non-parametric methods for recovering signal phase information using high-order spectral knowledge.