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Data transmission method and device

A legal and illegal technology, applied in the field of communication, can solve the problem of low security

Active Publication Date: 2020-05-12
徐州优盟科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a data transmission method and device to overcome the problem of low security in the prior art of implementing encryption by means of random weighting and artificial noise at the sending end

Method used

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Experimental program
Comparison scheme
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Embodiment 1

[0111] figure 1 The flow chart of Embodiment 1 of the data transmission method provided by the embodiment of the present invention, as shown in figure 1 As shown, the data transmission method of this embodiment may specifically include the following steps:

[0112] 101. The sending end estimates channel parameters according to the received pilot signal.

[0113] The data transmission method provided in the embodiment of the present invention can be applied to a SISO (single input single output) system, and the system can include a sending end and a receiving end, wherein the sending end includes an antenna. In order to enhance the security of communication, in the embodiment of the present invention, before sending a signal, the sending end first needs to determine the channel parameters between the sending end and the receiving end, and the way of determining the channel parameters can be channel estimation. Specifically, the receiving end sends a pilot signal to the sendin...

Embodiment 2

[0166] figure 2 The flow chart of Embodiment 2 of the data transmission method provided by the embodiment of the present invention, as shown in figure 2 As shown, the data transmission method of this embodiment may specifically include the following steps:

[0167] 201. The sending end estimates channel parameters according to the received pilot signal.

[0168] 202. If the channel parameters include legal channel parameters and illegal channel parameters at the same time, the sending end determines the minimum eigenvector according to the legal channel parameters and the illegal channel parameters.

[0169] 203. Determine whether the transmission power corresponding to the minimum eigenvector is less than or equal to the maximum power threshold, if yes, perform step 204, and if not, perform step 205.

[0170] 204. Determine the power of the signal sent by the sending end according to the minimum eigenvector.

[0171] 205. Determine the power of the signal sent by the sen...

Embodiment 3

[0183] image 3 The flow chart of the third embodiment of the data transmission method provided by the embodiment of the present invention, as shown in image 3 As shown, the data transmission method of this embodiment may further include the following steps after step 103 of Embodiment 1:

[0184] 304. If the channel parameters only include legal channel parameters, the sending end determines the largest eigenvector according to the legal channel parameters.

[0185] When the channel parameters estimated by the sending end only include legal channel parameters, the sending end is not sure whether there is an illegal receiving end. Therefore, it is necessary to use a method different from that in Embodiment 1 to analyze the waveform of the signal sent by the sending end. Adjust to achieve the purpose of interfering with the reception of illegal receivers.

[0186] In the embodiment of the present invention, assuming that the channel used by the legal receiver and the transmi...

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Abstract

The embodiment of the invention provides a data transmission method and a device thereof. The data transmission method comprises the following steps: estimating channel parameters via a sending end according to the received pilot signals; determining a minimal feature vector via the sending end according to legal channel parameters and illegal channel parameters if the channel parameters simultaneously contain the legal channel parameters and the illegal channel parameters; and determining power of signals sent by the sending end according to the minimal feature vector if the sending power corresponding to the minimal feature vector is less than or equal to a maximum power threshold. According to the technical scheme, the data transmission method and the device are capable of minimizing deterioration of SINR of an illegal receiving end through a manner of changing the sending power by using the channel parameters while ensuring that a legal receiving end can normally receive the signals, so that the communication security is enhanced.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a data transmission method and device. Background technique [0002] With the progress of society and the development of science and technology, communication technology is constantly changing and improving people's living and working methods. Communication technology is divided into wired communication and wireless communication. Among them, the way of wireless communication frees people from the shackles of wired communication and improves the convenience of work and life. [0003] The wireless communication system has gradually evolved from the first generation mobile communication system to the fourth generation mobile communication system. However, the system security problem runs through all the time and becomes the key and core problem to be solved in wireless communication. [0004] In the prior art, the OFDM (orthogonal frequency division multiplexing, Or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02H04B17/336
CPCH04B17/336H04L25/0202
Inventor 李明遆光宇
Owner 徐州优盟科技有限公司