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Design method of transmitting terminal of VLC (Visible Light Communication) secure communication system based on QoS (Quality of Service)

A design method and secure communication technology, applied in the field of visible light communication, can solve problems such as data loss and easy eavesdropping, and achieve the effects of reducing DC bias, facilitating engineering implementation, and low computational complexity

Active Publication Date: 2016-10-26
SOUTHEAST UNIV
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AI Technical Summary

Problems solved by technology

[0003] The popularity of the Internet and the large-scale application of wireless networks have brought convenience to people's lives, but eavesdropping and malicious use of data have caused serious losses to the entire society
Especially vulnerable to eavesdropping due to the broadcast nature of wireless communications

Method used

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  • Design method of transmitting terminal of VLC (Visible Light Communication) secure communication system based on QoS (Quality of Service)
  • Design method of transmitting terminal of VLC (Visible Light Communication) secure communication system based on QoS (Quality of Service)
  • Design method of transmitting terminal of VLC (Visible Light Communication) secure communication system based on QoS (Quality of Service)

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Embodiment Construction

[0035] The present invention will be further explained below in conjunction with the accompanying drawings.

[0036] Such as figure 1 Shown, a kind of QoS-based VLC secure communication system transmitter design method, comprises the following steps:

[0037] Step 1, use the signal precoding vector w to process the transmitted signal s to obtain x 1 , the calculation formula is:

[0038] x 1 =ws

[0039] Among them, w is an N-dimensional column vector, N is the number of LED arrays, and s obeys the uniform distribution on [-1,1].

[0040] Step 2, use the artificial noise precoding matrix F to process the artificial noise z to obtain x 2 , the calculation formula is:

[0041] x 2 =Fz

[0042] Among them, F is an N×L matrix, z is an L-dimensional column vector, L is the dimension of artificial noise, and the elements of z obey the uniform distribution on [-1,1] and are independent of each other.

[0043] Step 3, the processed emission signal x 1 , processed artificial ...

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Abstract

The invention discloses a design method of a transmitting terminal of a VLC (Visible Light Communication) secure communication system based on QoS (Quality of Service). By pre-coding transmitted signals and adding artificial noise, the direct current bias of the system is minimized under the condition that the SNRs (Signal to Noise Ratios) of a user and an eavesdropper satisfy the QoS limiting condition of secure communication. The influence of channel information errors of the eavesdropper is also sufficiently considered, so that the robustness of the secrecy performance of the system is improved. When secure communication is realized, the direct current bias of the system is effectively reduced, and the utilization rate of energy is improved; and the method is low in complexity and easy to implement in engineering.

Description

technical field [0001] The invention belongs to the field of visible light communication, and in particular relates to a method for designing a transmitting end of a VLC secure communication system based on quality of service (QoS). Background technique [0002] In the late 1990s, with the development of all-optical access technology and people's requirements for wireless communication, visible light communication (VLC) technology, which has large information capacity, flexible deployment and convenient maintenance, has attracted great attention. The rapid deployment of broadband access provides a flexible solution, and its application range has entered the civilian field from military and aerospace. [0003] The popularity of the Internet and the large-scale application of wireless networks have brought convenience to people's lives, but eavesdropping and malicious use of data have caused serious losses to the entire society. Due to the broadcast nature of wireless communi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04B10/116H04B10/50H04L25/06
CPCH04B7/0456H04B10/116H04B10/502H04L25/061Y02D30/70
Inventor 沈弘邓榆钦赵春明
Owner SOUTHEAST UNIV
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