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Method and device for feature extraction of physical layer equipment based on sampling rate deviation estimation

A feature extraction and physical layer technology, applied in the field of communication, can solve the problems of inability to extract features, carrier frequency deviation and I/Q offset deviation, etc., and achieve good environmental adaptability

Active Publication Date: 2021-05-04
NANJING INST OF CYBER TECH CO LTD
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Problems solved by technology

However, in baseband communication systems, such as wired communication systems, carrier frequency deviation and I / Q offset deviation do not exist, and their characteristics cannot be extracted

Method used

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  • Method and device for feature extraction of physical layer equipment based on sampling rate deviation estimation
  • Method and device for feature extraction of physical layer equipment based on sampling rate deviation estimation
  • Method and device for feature extraction of physical layer equipment based on sampling rate deviation estimation

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Embodiment Construction

[0044] The present invention provides a physical layer device feature extraction method based on sampling rate deviation estimation, which is suitable for a communication system with a repeated signal frame structure, and the method is executed at the receiving end, such as figure 1 shown, including the following steps:

[0045] Step 1: Receive a signal with a repeating signal frame structure sent by the target device.

[0046] Among them, the signal sent by the target device can be a fixed symbol sequence used for synchronization, or a pilot symbol sequence used for channel estimation, or a fixed-length and periodically repeated signal generated after the signal passes through the scrambling device. sequence of symbols.

[0047] For example, in the baseband communication system, the signal of the optical fiber communication system based on IEEE 802.3 has a certain repetition period, such as the 1.25Gbs gigabit communication system, when sampling with 10GS, the repetition per...

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Abstract

The invention discloses a method and device for feature extraction of physical layer equipment based on sampling rate deviation estimation. The method includes (1) receiving a signal with a repeated signal frame structure sent by a target equipment; (2) generating a standard signal according to the received signal, from Collect multiple signals at different positions in the received signal, and perform correlation calculations with the standard signal at irregular intervals to obtain the correlation value of each correlation peak and adjacent points; (3) Estimate the time of repeating the frame structure of the signal according to the results of step (3) Interval 1; (4) carry out the fixed-interval correlation operation with the signal of many different positions with the standard signal, obtain the correlation value set of each correlation peak and adjacent point; (5) the correlation value set calculation that step (4) obtains receives The change rule of the signal correlation peak; (6) the time interval I of the repeated signal frame structure and the change rule of the correlation peak are used as the physical layer device characteristics of the signal transmitting device. The invention can realize equipment feature extraction in a baseband communication system.

Description

technical field [0001] The invention relates to communication technology, in particular to a method for extracting physical layer device features based on sampling rate deviation estimation. Background technique [0002] Based on the physical layer device fingerprint feature of the transmitting device, the identity of the transmitting device can be identified. The physical layer fingerprint characteristics of the transmitting device mainly include transient characteristics, steady state characteristics and spectrum characteristics. However, the physical layer device feature extraction method based on transient features and spectral features is easily affected by transmission channel and signal-to-noise ratio interference, and has certain limitations in practical applications. The physical layer device feature extraction method based on steady-state features has better stability. In a wireless communication system, the steady-state characteristics mainly include carrier fre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/00H04L27/26
CPCH04L27/0014H04L27/2614H04L2027/0026
Inventor 方昊
Owner NANJING INST OF CYBER TECH CO LTD
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