A wireless communication key generation method based on channel characteristic parameters

Abstract

The invention discloses a method for generating a wireless communication key based on channel characteristic parameters, which includes: two communication parties sequentially send pilot signals to each other within the coherence time; both parties respectively process the received pilot signals to obtain their own channel Response; both parties extract channel characteristic parameters from their respective channel responses, and quantify and generate a binary sequence as the codebook number; the communication initiator generates verification information according to its codebook number and sends it to the communication receiver; the communication receiver receives the verification information The information is compared with the codebook number generated by the communication receiver, and if there is an error, the communication initiator is requested to re-initiate the communication, and if there is no error, a feedback message is sent to inform the communication sender that there is no error and the codebook number is used to find the codebook to obtain the key; The communication initiator receives the correct information, and searches the same codebook by the codebook number to obtain the key. The beneficial effects of the present invention: the present invention can guarantee a high key generation rate with relatively low computational complexity; and can be applied to the FDD system.

Description

technical field [0001] The invention relates to the technical field of wireless and mobile communication, in particular to a method for generating a wireless communication key based on channel characteristic parameters. Background technique [0002] At present, wireless communication is widely used in military and civilian fields, but the unique openness of wireless communication leads to low security of wireless information transmission. The traditional solution is to encrypt data through public and private keys at the network layer. However, in a dynamic wireless network, the symmetric encryption method needs to solve the problem of key distribution in wireless communication. On the one hand, key distribution introduces additional complexity and cost, and cannot quickly update the key or one-time encryption. It is easy to leak secrets during the distribution process. Asymmetric key algorithms require high power and high computing costs that are difficult for mobile nodes...

AI Technical Summary

Problems solved by technology

[0007] In view of this, the present invention provides a wireless communication key generation method based on channel feature parameters, which can solve the problem of large amount of computation, low key generation rate, and problems in the existing physical layer key generation technology based on wireless channel feature extraction. Deficiencies applicable to FDD communication systems

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