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Method for obtaining steady radio frequency fingerprints from BPSK (Binary Phase Shift Keying) signal

A radio frequency fingerprint and signal technology, applied in the field of obtaining robust radio frequency fingerprints, can solve the problems of lack of robustness of radio frequency fingerprints, and achieve the effect of eliminating the influence

Active Publication Date: 2013-04-17
NANTONG UNIVERSITY
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For RFF, the robustness of RFF is a prerequisite for subsequent feature extraction and classification and recognition, that is, the RFF samples of the same radio device to be identified are consistent, but there are factors such as time-varying wireless multipath channels that cause radio frequency Fingerprints lack robustness

Method used

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  • Method for obtaining steady radio frequency fingerprints from BPSK (Binary Phase Shift Keying) signal
  • Method for obtaining steady radio frequency fingerprints from BPSK (Binary Phase Shift Keying) signal
  • Method for obtaining steady radio frequency fingerprints from BPSK (Binary Phase Shift Keying) signal

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Embodiment Construction

[0042] control figure 1 , the RFF identification system in this embodiment is mainly composed of Wi-Fi 802.11b network card 1 (Netware Interface Card, NIC for short) radio equipment, wireless channel 2 and receiving equipment 3 . The Wi-Fi 802.11b USB NIC is externally connected to the corresponding computer 11, the frequency of the NIC is set to 2.412GHz, the working mode is set to the Ad-hoc state in which the frame is continuously sent to announce its existence, and the preamble is set to a short preamble. The receiving device 3 is composed of a receiving antenna 31 , a wireless signal amplifier 32 for amplifying the wireless signal received by the receiving antenna 31 , a computer 33 and a radio frequency oscilloscope 34 . The receiving antenna 31 is an external high-gain antenna; the wireless signal amplifier 32 is a DSO91304A amplifier with a power of 2W, and its sampling rate is set to 10GSps (sa / s); the bandwidth of the radio frequency oscilloscope is 13GHz, and the sa...

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Abstract

The invention relates to a method for obtaining steady radio frequency fingerprints from a BPSK (Binary Phase Shift Keying) signal. The method comprises the following steps of: carrying out demodulation and normalization processing on a revived BPSK radio frequency signal to obtain a corresponding BPSK receiving baseband signal; carrying out starting point detection based on an energy threshold on the BPSK receiving baseband signal; intercepting a signal with certain duration of a head part and carrying out de-noising processing on the intercepted signal; carrying out windowing processing on a de-noised signal and carrying out real cepstrum conversion on a windowed signal; and carrying out low-pass filtering and windowing processing on an obtained real cepstrum signal to obtain steady cepstrum radio frequency fingerprints. The cepstrum radio frequency fingerprints obtained by the method disclosed by the invention have time translation invariance and better robustness.

Description

[0001] technical field [0002] The invention relates to wireless network communication technology, in particular to a method for obtaining robust radio frequency fingerprints from BPSK signals. Background technique [0003] The identification of radio equipment based on Radio Frequency fingerprint (RFF) belongs to the category of identity authentication based on physical unclonable functions, which makes RFF have strong application prospects in military and civilian applications. For example: physical layer access control of wireless networks, electronic forensics of radio equipment, radio station management, individual identification of communication stations and identification of specific radiation sources, anti-cloning RFID based on physical characteristics, user detection in cognitive radio, and merchandise Supply chain ownership transfer, etc. RFF is the transformation of the received radio analog signal carrying part of the hardware information of the wireless de...

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Application Information

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IPC IPC(8): H04L9/32
Inventor 袁红林包志华
Owner NANTONG UNIVERSITY
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