Identification method of wireless transmitter based on RF fingerprints (RFF)

Abstract

The invention discloses an identification method of a wireless transmitter based on RF fingerprints (RFF). The method comprises the following steps: receiving a wireless signal transmitted by the wireless transmitter, wherein the wireless signal is a preamble sequence transmitted by the wireless transmitter while power is increased gradually; detecting reference time of the wireless signal; according to the detected reference time, carrying out preamble signal interception on the wireless signal; converting the intercepted preamble signal into the RFF; carrying out feature extraction on the converted RFF and carrying out identification on the wireless transmitter. According to the identification method of the wireless transmitter based on the RFF, through using advantages that RFF separability is good and a required sampling rate is low, ramp-up RFF can be used for multiple RFF identification of wireless equipment based on the preamble so that purposes of increasing wireless network physical layer safety and so on can be realized, wherein the advantages are possessed by the ramp-up RFF (radio frequency fingerprints RFF) which is obtained through converting the preamble signal transmitted during the power is obliquely ascended.

Description

technical field [0001] The invention relates to the field of wireless communication equipment, in particular to a radio frequency fingerprint-based identification method for a wireless transmitter. Background technique [0002] With the gradual increase of security threats, the physical layer security method of wireless network is getting more and more attention. Identifying wireless devices based on radio frequency fingerprints (RF fingerprints, RFF for short) to implement access control thereof has been proposed to enhance the physical layer security of wireless networks. RFF can be generalized as a transformation of the received radio signal carrying information about the hardware of the radio transmitter, and this transformation is comparable. The turn-on RFF converted from the power-on transient signal is a classic RFF, including envelope turn-on RFF and phase turn-on RFF. [0003] Figure 1a-Figure 1e Reveals the envelope turn-on RFF sample alignment of five Wi-Fi 80...

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Problems solved by technology

In addition, I.O.Kennedy, P.Scanlon and M.M.Buddhikot jointly published entitled "Passive Steady State RF Fingerprinting: A Cognitive Technique for Scalable Deployment of Co-Channel Femto Cell Underlays" (published in Proc.IEEE New Fron.in Dyn. Spec.Access Networks (DySPAN'08), 2008, PP.1-12) pointed out in the paper that the sampling rate required by tu rn-on RFF is extremely high, so its practical value is limited

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