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Information hiding wireless transmission method based on time reversal

A wireless transmission and time inversion technology, applied in the field of electronics, can solve the problems of easy decryption and loss of encrypted information

Inactive Publication Date: 2016-06-15
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, with the continuous development of electronic information technology, especially the improvement of computer technology, it is easy to crack the information encrypted by digital signal processing technology.
For example, many mobile APPs can instantly crack the password of the wireless hotspot (WIFI) and cause losses.

Method used

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  • Information hiding wireless transmission method based on time reversal
  • Information hiding wireless transmission method based on time reversal
  • Information hiding wireless transmission method based on time reversal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Step 1, a pulse signal A(t) is emitted by the pulse generator 1 . figure 1 The pulse generator shown in can be implemented by a photoconductive switch or an arbitrary waveform generator.

[0055] Step 2, send the pulse signal A(t) into the amplifier 2 to obtain the cloak signal C(t). At this time, the cloak signal C(t) and the target signal S(t) are synthesized into a signal Y(t) through the power combiner 3, such as image 3 shown. The mathematical expression of the signal Y(t) is,

[0056] Y(t)=C(t)+S(t)(1)

[0057] Step 3, send the synthesized signal Y(t) to image 3 Shown in reverberation chamber 4. In this embodiment, the dimensions of the reverberation cavity are a=40cm, b=40cm, and c=70cm. Since the reverberation cavity is a multipath delay structure, its time domain response can be expressed as,

[0058] H ( t ) = Σ i = ...

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Abstract

The invention discloses an information hiding wireless transmission method based on time reversal, and belongs to the field of electronic technology. The method comprises the following steps that: a cloak pulse H(t) is added in front of an encoded target signal T(t) to form a new pulse sequence X(t); the cloak pulse undergoes a multipath delay effect after passing through a first reverberation cavity, a waveform is extended, and the target signal is hidden to form a new signal Y(t); the Y(t) is transmitted, and time reversal waveform transform is performed on the signal Y(t) after the signal Y(t) is received by a receiving end to obtain Y(-t); and the Y(-t) is input into a second reverberation cavity being the same as the first reverberation cavity, and the cloak signal and the target signal are recovered. Through the scheme, information hiding transmission is realized. The information hiding wireless transmission method is applied to the field of secret communication.

Description

technical field [0001] The invention belongs to the field of electronics, and in particular relates to an information hidden wireless transmission method based on time reversal. Background technique [0002] With the continuous development of society and the continuous updating of science and technology, the amount of information that people come into contact with is also increasing, and the means of information transmission and acquisition are also constantly enriched. Wireless information is the most widespread communication method today. In wireless communication, in order to prevent confidential information from being intercepted, the communication objects must encode information according to the method agreed in advance, so that the information can be disguised or communicated in a way that conceals its true content. . In the process of information transmission, the transmitting end needs to encrypt the information to be transmitted, change the expression form of the o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06
CPCH04L63/0428
Inventor 丁帅
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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