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Anti-pilot spoofing attack channel estimation and identification method based on independent component analysis in ofdm system

A technology of independent component analysis and channel estimation, which is applied in the field of channel estimation and identification against pilot spoofing attacks based on independent component analysis, can solve the problem that it is difficult for legal transceivers to obtain accurate channel state information of legal links, and achieve improved Effect of Channel Estimation Accuracy

Active Publication Date: 2019-03-01
XI AN JIAOTONG UNIV
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Problems solved by technology

Moreover, once the pilot spoofing attack is successfully implemented, it is difficult for the legitimate transceiver to obtain accurate channel state information of the legal link

Method used

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  • Anti-pilot spoofing attack channel estimation and identification method based on independent component analysis in ofdm system
  • Anti-pilot spoofing attack channel estimation and identification method based on independent component analysis in ofdm system
  • Anti-pilot spoofing attack channel estimation and identification method based on independent component analysis in ofdm system

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Embodiment Construction

[0040] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

[0041] In the method of the present invention, when the system model is set up, a pair of legal transceivers and an active eavesdropper are considered, and two uplink communication links are respectively 1. uplink transmitter→receiver, defined as legal channel 2. Active eavesdropper → receiver is defined as the attack channel. The receiver has N T The root antenna, the uplink transmitter and the active eavesdropper are all single antennas, such as figure 1 As shown, each antenna of each uplink simultaneously occupies N subcarriers in each OFDM symbol. The channel coefficients on each subcarrier obey the independent and identical distribution with a mean value of 0 and a variance of 1, and the noise on each subcarrier obeys an independent and identically distributed Gaussian white noise with...

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Abstract

The invention provides a method for channel estimation and identification against a pilot spoofing attack based on independent component analysis in an OFDM (Orthogonal Frequency Division Multiplexing) system. The method utilizes the characteristics of the random pilot to weaken the pilot spoofing attack to a pilot interference attack, and meanwhile, a legal channel between an uplink legal transmitter and a receiver under the pilot interference environment is estimated and identified according to the independent features of the channel. The method only need to spend time resources of three OFDM symbols and a certain number of frequency band resources and is immune to the pilot interference power of an active eavesdropper. The uplink legal transmitter disrupts the intentional pilot attack of the active eavesdropper through transmitting the uplink random pilot, and meanwhile, the receiver extracts legal channel information from a received contaminated signal through utilizing the mutual independence between the legal channel and an attack channel, so that the channel estimation accuracy of the legal channel is improved, and thus a problem of low channel estimation accuracy caused by the pilot spoofing attack is solved.

Description

technical field [0001] The invention belongs to the field of wireless communication, and relates to a channel estimation and identification mechanism against pilot spoofing attacks in an OFDM system, in particular to an anti-pilot spoofing attack channel estimation and identification method based on independent component analysis in an OFDM system. Background technique [0002] With the rapid development of wireless communication technology, security risks are gradually threatening and restricting the application and development of wireless communication technology. The broadcast characteristics of wireless channels can make harmful signal sources eavesdrop on the confidential and private information of other nodes or harm and interfere with the communication links of other normal nodes. At present, the upper-layer password encryption and decryption system can guarantee the security of the wireless communication environment to a certain extent, but with the development of co...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02H04L27/26
CPCH04L25/024H04L27/2601
Inventor 任品毅徐东阳王熠晨杜清河孙黎
Owner XI AN JIAOTONG UNIV
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