Signal identification method and communication device

Abstract

To solve the problem that frame overlap in signal transmission processing causes a receiving end device to be unable to accurately synchronize to a target frame, resulting in data packet loss, a signal identification method and a communication apparatus are provided, which can be applied to systems such as UWB-based wireless personal area network systems, Wi-Fi systems, and detection systems. The method includes: a first device performs channel estimation based on an L-LTF sequence corresponding to a received signal frame to obtain a first channel estimate, and determines whether the L-LTF sequence corresponding to the signal frame is a target L-LTF sequence based on the first channel estimate and mark information of N subcarrier elements, where the first channel estimate includes channel estimates corresponding to M subcarrier elements in the L-LTF sequence corresponding to the signal frame, and the mark information of the N subcarrier elements includes sequence numbers of the N subcarrier elements and amplitude and / or phase change values ​​corresponding to the N subcarrier elements, where M and N are positive integers, M>1, 1≦N≦M.

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