Method and device for sending hidden data by modulating amplitude of LoRa signal

Abstract

The invention discloses a method and device for sending hidden data by modulating the amplitude of a LoRa signal, and the method comprises the steps: obtaining a first LoRa signal, carrying out the amplitude modulation of the first LoRa signal, and obtaining a second LoRa signal, wherein the first LoRa signal is a carrier signal subjected to frequency modulation, and the second LoRa signal is a carrier signal subjected to frequency modulation and amplitude modulation; and sending the second LoRa signal. According to the method, amplitude modulation is carried out on the carrier signal subjected to frequency modulation again, so that the carrier signal can carry dual information. Due to the fact that a conventional LoRa network system lacks detection of the LoRa physical layer signal amplitude, so information carried by the amplitude parameter of the carrier signal cannot be detected by the conventional LoRa network system, that is, the information carried by the amplitude parameter ofthe carrier signal has concealment to the conventional LoRa network system. 本发明公开了通过调制LoRa信号幅度发送隐蔽数据的方法及装置，所述方法包括：获取第一LoRa信号，对所述第一LoRa信号进行幅度调制，得到第二LoRa信号；其中，所述第一LoRa信号为经过频率调制的载波信号，所述第二LoRa信号为经过频率调制和幅度调制的载波信号；发送所述第二LoRa信号。本发明通过对经过频率调制的载波信号再次进行幅度调制，使得载波信号可以携带双重信息。由于现有的LoRa网络体系缺乏对LoRa物理层信号幅度的检测，因此载波信号的幅度参数携带的信息并不会被现有的LoRa网络体系检测到，即载波信号的幅度参数携带的信息对现有的LoRa网络体系具有隐蔽性。