Finite block length covert communication implementation method based on channel estimation

A channel estimation and covert communication technology, applied in wireless communication, baseband system, baseband system components and other directions, can solve the problem of unavoidable channel estimation, and achieve the effect of reducing complexity and improving performance

Active Publication Date: 2019-10-01
NANJING UNIV OF SCI & TECH
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Problems solved by technology

However, in practice, the assumption of channel reciprocity is too ideal, which inevitably estimates the channel
At the same time, most of the

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  • Finite block length covert communication implementation method based on channel estimation
  • Finite block length covert communication implementation method based on channel estimation
  • Finite block length covert communication implementation method based on channel estimation

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Embodiment Construction

[0030] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.

[0031] A finite block length covert communication implementation method based on channel estimation of the present invention includes: first obtain the optimal error probability of the watchman, make it greater than a certain number close to 1, as a covert condition, and then maximize the effective rate to Optimize the number of pilots and power allocation factors.

[0032] As an embodiment, the method includes: if there is a channel estimation error, first obtain the ef...

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Abstract

The invention provides a finite block length covert communication implementation method based on channel estimation. In the past, studies on covert communication in a fading channel are supposed thatthe channel is known, or channel estimation is avoided through a channel inversion power control method. However, in practice, channel estimation is inevitably performed in a fading channel due to theideality of channel reciprocity hypothesis. In conventional channel estimation, the optimal pilot number is equal to the number of transmission antennas, but in covert communication, the conclusion may not be established any more. In order to improve the reliability of covert communication, a minimum mean square error estimation method is used for estimating a channel, and the optimal pilot frequency number, the optimal transmitting power, the optimal data number and the optimal transmitting power are designed under the covert constraint condition to maximize the effective rate. Meanwhile, due to the fact that previous studies are generally concentrated on analysis of infinite block lengths, but symbols of the limited block lengths are usually sent in practice, hidden communication underthe limited block lengths is studied through the method.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for realizing covert communication with limited block length based on channel estimation. Background technique [0002] With the rapid development of mobile communications, it is becoming more and more important to protect the privacy of information transmission. However, in the traditional method of ensuring information security, the information content itself is often protected, such as encryption. But in this way, it is easy for the eavesdropper to know that the secret information is being transmitted at this time, and it will be easier to arouse the eavesdropper's interest in deciphering. [0003] The purpose of covert communication is to hide the process of information transmission, so that the watchman does not know that there is information transmission, that is, to ensure that the watchman detects that the information is being transmitted with a v...

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Application Information

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IPC IPC(8): H04W12/02H04L25/02
CPCH04W12/02H04L25/0256Y02D30/70
Inventor 束锋徐婷珍唐钰城胡锦松颜世豪桂林卿徐玲刘笑语陆造宇钱玉文
Owner NANJING UNIV OF SCI & TECH
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