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Two-dimensional data concealed transmission method based on data-driven multi-subcarrier mapping

A two-dimensional data, multi-subcarrier technology, applied in the field of data communication, can solve the problems of single data modulation, no transmission of two channels of data at the same time, etc., to achieve reduced channel interference rate, strong anti-interference ability, strong concealment and confidentiality sexual effect

Active Publication Date: 2018-07-13
SHENYANG LIGONG UNIV
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Problems solved by technology

[0006] However, existing communication technologies such as frequency hopping, differential frequency hopping, and OFDM can only modulate a single data onto a carrier for transmission, and there is currently no communication technology that can simultaneously transmit two channels of data

Method used

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  • Two-dimensional data concealed transmission method based on data-driven multi-subcarrier mapping
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  • Two-dimensional data concealed transmission method based on data-driven multi-subcarrier mapping

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Embodiment Construction

[0032] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0033] A two-dimensional data covert transmission method based on data-driven multi-subcarrier mapping, such as figure 2 As shown, the method of this embodiment is as follows.

[0034] Step 1: Carry out second-dimensional data subcarrier mapping based on the differential system, which specifically includes 2 steps:

[0035] (1) Input the second dimension data D with half the number of subcarriers 2 ,D 2 ={d 21 ,...,d 2n ,...,d 2N}, where d 2n is the second dimension data element, d 2n ∈ {0, 1}, n ∈ N + , 1≤n≤N, 2N is the number of subcarriers;

[0036] (2) Carry out subcarrier mapping according to the following formula after serial-to-parallel conversion,

[00...

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Abstract

The invention provides a two-dimensional data concealed transmission method based on data-driven multi-subcarrier mapping, relating to the technical field of data communication. The method includes the following steps: performing second-dimensional data subcarrier mapping based on a differential system; performing first-dimensional data modulation based on an OFDM system; performing channel transmission; performing second-dimensional data demodulation based on subcarrier detection after receiving a signal; and performing first-dimensional data demodulation based on FFT. According to the schemeof the invention, the differential system and an OFDM technology are combined, the number of subcarriers is increased, and based on the original operation of performing parallel multi-subcarrier modulation on first-dimensional transmission data, second-dimensional transmission data is used to control the selection of the subcarriers, and thus the concealed transmission of the second-dimensional transmission data can be implemented, and the anti-interference performance of the communication process can be improved.

Description

technical field [0001] The invention relates to the technical field of data communication, in particular to a two-dimensional data covert transmission method based on data-driven multi-subcarrier mapping. Background technique [0002] OFDM orthogonal frequency division multiplexing technology, by dividing the channel into several orthogonal sub-channels, the high-speed data stream is converted into multiple low-speed sub-data streams in parallel, and each low-speed sub-data stream is modulated corresponding to a sub-carrier to form a multi-carrier Parallel transmission system with simultaneous modulation. It can effectively resist multipath fading and has the characteristics of high spectrum utilization. [0003] Frequency-Hopping FHSS (Frequency-Hopping Spread Spectrum) technology controls the carrier frequency of the transmission signal to change according to specific rules over time to avoid detection and interference, and has the advantages of strong anti-interception a...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L5/00H04B1/715
CPCH04B1/715H04B2001/7152H04L5/0007H04L27/2628H04L27/265
Inventor 冯永新钱博周帆刘芳
Owner SHENYANG LIGONG UNIV
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