A comprehensive information fusion method of wireless channel characteristics

Abstract

A wireless channel characteristic comprehensive information fusion method includes the steps of characteristic extraction, information entropy calculation, low entropy elimination, key negotiation and staggered fusion. Characteristic extraction is used for obtaining three types of wireless channel characteristic values, namely, the strength, the phase and the Doppler frequency shift of a received signal, from a wireless communication system. Information entropy calculation is used for estimating the information amounts of the three types of wireless channel characteristic values. Low entropy elimination is used for deleting the wireless channel characteristic values lower than a certain threshold value and conducting key negotiation on the wireless channel characteristic values conforming to the conditions. Key negotiation is used for generating symmetric keys through the wireless channel characteristic values. Staggered fusion is used for arraying the keys generated through the different channel characteristic values in a staggered mode and generating a final key. By means of the method, the aim of generating the symmetric keys through the various types of wireless channel characteristics together is achieved, the high key generation capacity, the high key security and the high environment adaption capacity are provided, and the development of the next generation of symmetric key technology is powerfully supported.

Description

technical field [0001] The invention belongs to the field of communication, and relates to a feature extraction and fusion application method of communication signals. Background technique [0002] With the development of radio communication technology, the security requirements in the communication process are getting higher and higher. By using the characteristics of the wireless channel to generate a symmetric key, the communication parties can generate and distribute a truly random and highly secure key in real time during the communication process. This method can be used in the wireless communication data link of missile weapons and on-orbit aircraft, which greatly improves the anti-interception capability of the data link. [0003] Existing methods for generating symmetric keys using wireless channel characteristics mainly use received signal strength as the key source, and a few use Doppler frequency shift as the key source. The shortcomings of these methods are: w...

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, and provide a wireless channel feature comprehensive information fusion method, which solves the problem of low generation rate caused by the existing symmetric key generation using a single feature of the wireless channel , poor randomness, and weak environmental adaptability. It realizes the purpose of using multiple wireless channel characteristics to generate symmetric keys, and provides high key generation ability, key security and environmental adaptability. Strong support for the development of next-generation symmetric key technology

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