Physical layer watermark authentication method and system for LTE system

An authentication method and physical layer technology, which is applied in the field of physical layer watermark authentication, can solve the problems of not considering the actual application scenarios of the watermark scheme, and achieve the effects of reducing system overhead, reducing bit error rate, and improving authentication success rate

Active Publication Date: 2021-09-28
HUAZHONG UNIV OF SCI & TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The existing physical layer watermarking schemes are all based on a specific modulation method (such as QPSK, FSK, OFDM, etc.), and the watermark information i

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  • Physical layer watermark authentication method and system for LTE system
  • Physical layer watermark authentication method and system for LTE system
  • Physical layer watermark authentication method and system for LTE system

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[0037] In order to make the objectives, technical solutions and advantages of the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely intended to illustrate the invention and are not intended to limit the invention. Further, the technical features according to each of the various embodiments described below can be combined with each other as long as they do not constitute a collision between each other.

[0038] The watermark authentication scheme suitable for the LTE system for the present invention mainly includes a transmitter to generate watermark, embedding watermark, and a recipient extracting watermark, an authentication watermark; the number of subcarriers of the LTE system is less than 36, and the user signal is 16QAM or 64QAM. In an embodiment, the signal is transmitted in units of subframes, each subfr...

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Abstract

The invention discloses a physical layer watermark authentication method and system for an LTE system, and belongs to the field of physical layer watermark authentication. A physical layer authentication technology is applied to an LTE system, system overhead required by traditional high-level authentication is reduced, and a traditional watermark authentication scheme is improved as follows: a watermark is embedded into a phase of a reference signal, interference of the watermark to a user signal is reduced, and meanwhile, by adopting a phase symmetric embedding mode, the influence of the watermark on the channel estimation of the reference signal is reduced; according to the method, the concept of pseudo user bits is provided, the pseudo user bits are used for replacing user bits to serve as parameters for watermark generation, and authentication errors caused by user signal demodulation errors of a receiving end are reduced; in addition, channel codes are added into a watermark generation scheme, and error codes generated in the watermark transmission process are reduced.

Description

technical field [0001] The invention belongs to the field of physical layer watermark authentication, and more specifically relates to a physical layer watermark authentication method and system for an LTE system. Background technique [0002] In recent years, the research on physical layer security mechanism has become the focus of people's attention. As an important way to realize the physical layer security mechanism, the physical layer authentication technology has strong theoretical and practical significance. The physical layer watermarking technology embeds the authentication information in the transmission signal in the form of watermark, which is the most commonly used physical layer authentication technology. [0003] In the communication system, the watermark scheme is firstly generated by the transmitter and embedded in the transmitted signal, then the receiver extracts the watermark in the transmitted signal, and generates a watermark at the receiving end, and ...

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Application Information

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IPC IPC(8): H04W12/06H04W12/041H04W12/03H04W12/122
CPCH04W12/06H04W12/041H04W12/03H04W12/122Y02D30/70
Inventor 徐争光陈婉
Owner HUAZHONG UNIV OF SCI & TECH
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