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Optimization method for robust beamforming in non-orthogonal multiple access technology for visible light communication

A technology of visible light communication and non-orthogonal multiple access, which is applied in the optimization field of robust beamforming of non-orthogonal multiple access technology of visible light communication, and can solve problems such as estimation error, channel state information estimation error and feedback quantization error. , to achieve the effect of meeting service quality requirements, reducing the probability of interruption, and minimizing service quality

Inactive Publication Date: 2019-12-27
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0004] In practice, channel state information is not ideal due to estimation error and feedback quantization error, and channel estimation error

Method used

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  • Optimization method for robust beamforming in non-orthogonal multiple access technology for visible light communication
  • Optimization method for robust beamforming in non-orthogonal multiple access technology for visible light communication
  • Optimization method for robust beamforming in non-orthogonal multiple access technology for visible light communication

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Embodiment Construction

[0046] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0047] Downlink transmission may be interrupted due to random channel state information errors. To address this issue, we aim to design robust beamforming that minimizes transmit power while meeting quality of service requirements.

[0048] Such as figure 1 As shown, in the robust beamforming design method with bounded channel estimation error in the downlink of visible light communication NOMA-MISO single cell, the system function modeling steps are as follows:

[0049] Step 1: In practice, channel state information is not ideal due to estimation error and feedback quantization error. The present invention focuses on the error of channel state information caused by estimation error, which obeys a uniform distribution. Therefore, the required channel state information of The model is as follows:

[0050]

[0051] Step 2: According to this a...

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Abstract

The invention discloses an optimization method of visible light communication non-orthogonal multiple access technology robust beam-forming. The specific steps are as follows: establishing a system model of the NOMA to minimize the transmitting power while satisfying the user service quality, thereby satisfying the energy conservation and consumption reduction requirement in the future mobile communication technology. By using the convex optimization method, the relax transformation is performed on the established non-convex system function, and then the solution is performed by using the interior point method. Compared with the existing modeling and processing method, the method disclosed by the invention can satisfy the quality of service requirement and reduce the outage probability under the existence of the estimation error.

Description

technical field [0001] The invention belongs to the field of visible light communication, and in particular relates to an optimization method for robust beamforming of non-orthogonal multiple access technology of visible light communication. Background technique [0002] As 4G networks have been put into commercial use around the world, 5G "for 2020 and the future" has become a research hotspot in the global wireless communication field. Compared with 4G, 5G has put forward technical goals such as "1000 times data traffic growth, 100 times wireless terminal capacity, 10Gbps peak transmission rate and 100Mbps-1Gbps edge rate", which means that 5G's requirements for spectrum resources and energy consumption will be far greater. More than 4G. Due to the faster rate and higher spectrum utilization required by 5G, the traditional orthogonal multiple access can no longer meet the requirements. The industry proposes to adopt a new type of multiple -orthogonal Multiple Access, NOM...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/116H04B7/06
CPCH04B7/0617H04B10/116Y02D30/70
Inventor 马帅贺阳代佳辉李世银
Owner CHINA UNIV OF MINING & TECH
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