A method for finding the minimum power of downlink noma in visible light communication system

A visible light communication and minimization technology, applied in the field of visible light communication, can solve the problems of inapplicability and infeasibility, and achieve the effect of high speed

Inactive Publication Date: 2019-10-08
CHINA UNIV OF MINING & TECH
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Problems solved by technology

In traditional wireless communication, the user attainable rate expression based on NOMA technology is derived according to the Gaussian distribution of the input, but in the visible light communication system, the input requirement is non-negative, so the input signal of the Gaussian distribution is not feasible. Therefore, The user-reachable rate expression of NOMA technology in traditional wireless communication is not suitable for visible light communication systems

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  • A method for finding the minimum power of downlink noma in visible light communication system
  • A method for finding the minimum power of downlink noma in visible light communication system
  • A method for finding the minimum power of downlink noma in visible light communication system

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Embodiment Construction

[0056] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0057] According to the channel characteristics in visible light communication, the present invention proposes a closed-type expression for calculating downlink NOMA user rate and provides a method for minimizing transmission power while meeting service quality requirements.

[0058] Visible light communication downlink NOMA channel system model, such as figure 1 As shown, the specific steps are as follows:

[0059] Step 1: Set system-related parameters and input signals according to design requirements.

[0060] For the i-th user, no DC bias A is added i The emission signal is X i , whose parameters are as follows:

[0061] Peak: |s k |≤A k ;

[0062] Mean: E{|s k |}=0;

[0063] Mean square value: E{|s k | 2}=ε K , ε K is the target average electric power;

[0064] We consider the model of the NOMA downlink channel in visible light c...

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Abstract

The invention discloses a method for solving downlink NOMA (Non-orthogonal Multiple Access) minimized power of a visible light communication system. According to the method, an NOMA system model is established, a downlink NOMA user rate closed expression in the visible light communication is derived according to features of signals in the visible light communication system, the user quality of service is satisfied, and moreover, the transmitting power is minimized, so energy conservation and emission reduction demands in a mobile communication technology are satisfied. Compared with frequency division multiplexing, the method has the advantages that a user sum rate is maximized, moreover, the consumed transmitting power is minimum, and the user quality of service is ensured.

Description

technical field [0001] The invention belongs to the field of visible light communication, and in particular relates to a method for finding the minimum power of downlink NOMA in a visible light communication system. Background technique [0002] With the popularization of smart terminals and the development of new mobile services, the demand for wireless networks in various application fields is growing explosively, and the existing commercial networks need to be fully upgraded. Therefore, the new generation of mobile communication system 5G has become the focus of research in the global mobile communication field. hotspot. 5G is positioned as a wireless network with higher spectral efficiency, faster speed, and larger capacity. In 2020, the system capacity will increase by 1000 times / , and the spectral efficiency needs to be increased by 5 to 15 times compared with 4G. The industry proposes to adopt a new type of multiple access technology in 5G, that is, non-orthogonal m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/116H04B10/079H04B10/293
Inventor 马帅贺阳代佳辉李世银
Owner CHINA UNIV OF MINING & TECH
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