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Joint time-frequency duplex shared channel characteristic obtaining method

A joint time-frequency and channel-sharing technology, applied in the field of communication, can solve problems such as the inability to guarantee channel information, the inability to guarantee the security of generated keys, etc., and achieve a high degree of reciprocity

Active Publication Date: 2015-11-25
SOUTHEAST UNIV
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Problems solved by technology

[0005] However, based on the JRNSO transmission communication method specified in US8401196B2, no matter in TDD mode or FDD mode, it cannot guarantee that the channel information shared by the communication parties will not be deciphered by eavesdroppers in the case of eavesdroppers, so that the generation of key security

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  • Joint time-frequency duplex shared channel characteristic obtaining method
  • Joint time-frequency duplex shared channel characteristic obtaining method
  • Joint time-frequency duplex shared channel characteristic obtaining method

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] The joint time-frequency duplex shared channel feature acquisition method needs to use two channels of different frequency bands for key information transmission. Its transmission channel model is as figure 1 shown. exist figure 1 In the model shown, Alice and Bob can use two frequency bands for transmission respectively. The signal transmitted from Alice to Bob through frequency band 1 has a channel response of channel, the signal transmitted from Alice to Bob through frequency band 2 has a channel response of channel, the signal transmitted by Bob to Alice through frequency band 1 has a channel response of channel, the signal transmitted by Bob to Alice through frequency band 2 has a channel response of Channel. The signal transmitted by the Alice terminal parasitizes the device fingerprint The signal transmitted by the Bob side parasitic device f...

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Abstract

The invention discloses a joint time-frequency duplex shared channel characteristic obtaining method. Two parties of communication obtain channel characteristics using two frequency bands. The two parties of communication send channel measurement signals to each other at different moments firstly using the first frequency band, and then return the received signals to the opposite parties at different moments using the other frequency band without processing or only simple processing such as signal amplitude amplification. According to the method, the two parties of communication can obtain highly consistent shared channel characteristics in case of different device fingerprints. Besides, the method is capable of ensuring that the channel characteristics obtained by the two legal parties of communication cannot be broken by a third-party wiretapper after the whole information exchange process is wiretapped, thereby ensuring the security of obtaining the shared channel characteristics. The method joint time-frequency duplex shared channel characteristic obtaining method can be applied to a wireless communication system or to a wired communication system and an optical fiber communication system.

Description

technical field [0001] The present application relates to the communication field, and in particular to a method for acquiring channel characteristics in a Time Division Duplex (TDD, TimeDivisionDuplex) system. In addition, it can also be used in some specific Frequency Division Duplex (FDD, Frequency Division Duplex) systems. Background technique [0002] With the development of communication technology, digital communication system has been applied in various fields, and its security has attracted more and more attention. The communication system based on password protection can effectively guarantee the security of communication information. The security of traditional encryption methods mainly depends on the complexity of key cracking. However, as the length of the key increases, the complexity of the encryption and decryption technology implemented by the terminal also increases rapidly. At the same time, with the development of information countermeasure technology,...

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Application Information

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IPC IPC(8): H04L5/00H04L25/02
CPCH04L5/0057H04L25/0202
Inventor 彭林宁胡爱群
Owner SOUTHEAST UNIV
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