Physical layer digital watermarking method for 4G communication

The invention discloses a physical layer digital watermarking method for 4G communication. According to the method, the advantage that a shared key and a channel have short-time heterogeneity is utilized. The method comprises the following steps: generating digital watermark information for each dat...

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Bibliographic Details
Main Authors LU MING, JI XIAOPENG, LIU WEIWEI, LIU YUANDU, LIU GUANGJIE
Format Patent
LanguageChinese
English
Published 24.03.2020
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:The invention discloses a physical layer digital watermarking method for 4G communication. According to the method, the advantage that a shared key and a channel have short-time heterogeneity is utilized. The method comprises the following steps: generating digital watermark information for each data field in a data packet through a one-way hash function by using an estimated value obtained by channel estimation of a pilot signal and a pre-shared key in 4G communication by a sender, performing spread spectrum processing to obtain a label signal, embedding the label signal into a carrier signal, and sending the superposed signal to a receiver; and detecting and extracting the watermark data at a receiver to obtain watermark information, recalculating the watermark information for the pilotsignal, and judging whether the data is from the same sender by judging whether the two pieces of digital watermark information are the same. According to the method, the security authentication information is modulated in th
Bibliography:Application Number: CN201911066084