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scma codebook design method based on moth-flame algorithm

A technology of moths to flames and design methods, which is applied in the field of non-orthogonal multiple access system codebooks, to achieve the effect of simple implementation and improved bit error rate

Active Publication Date: 2022-06-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is, in order to reduce the design complexity of SCMA codebook, provide a kind of method that uses moth to flame algorithm to search user's code word parameter in SCMA codebook design

Method used

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  • scma codebook design method based on moth-flame algorithm
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Experimental program
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Embodiment Construction

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[0037] K=4, N=2, M=4

[0038] The number of users

[0041] The number of user codewords multiplexed on the resource block can be expressed as:

[0042] S

[0043] S

[0044] S

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[0048] By the Latin criterion, the factor graph matrix F is constructed.

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[0057] S

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[0067] Step 4.2: update the position of the moth, recalculate f_BER according to the updated moth position and arrange in ascending order,

[0069] Step 4.4: continue to update the moth position until reaching the maximum number of iterations Iter;

[0070] Step 4.5: Obtain the moth position that minimizes f_BER to obtain the best SCMA codebook.

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[010...

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Abstract

The present invention provides a SCMA codebook design method based on the moth-flaming algorithm, according to setting parameters in the SCMA codebook, setting user codewords, and determining optimized parameters; then constructing the SCMA codebook to be optimized and finally optimizing the SCMA codebook The SCMA codebook takes the minimum bit error rate as the criterion, and obtains the optimal parameter value of the parameter to be optimized through the moth-flame algorithm, so that the optimal SCMA codebook is obtained according to the optimal parameter value. The present invention can be applicable to the SCMA codebook design under different channels, under different channels, only need to change the channel parameter of SCMA in the bit error rate function f_BER; With the increase of the number of users, the complexity of the moth-flaming algorithm increases slowly, The implementation is simple; according to the simulation results, under the Gaussian channel and the Rayleigh channel, the bit error rate of the codebook obtained by the method of the present invention is significantly improved compared with other codebooks.

Description

Design method of SCMA codebook based on moth to flame algorithm technical field The present invention relates to wireless communication technology, be specifically related to a kind of non-orthogonal multiple access system based on moth to fire algorithm Codebook technology. Background technique In recent years, with the continuous development of society, the communication technology is constantly progressing, and the mobile communication system has become a human society. One of the most critical information networks. Fifth generation mobile communication system 5G (Fifth‑Generation) in higher frequency spectrum Efficiency, large-scale connections and lower latency are in high demand, traditional orthogonal multiple access OMA Due to the orthogonality of the (OrthogonalMultipleAccess) technology, the number of resource blocks and the number of users must be the same, which cannot be satisfied. 5G requirements. Non-Orthogonal Multiple Access NOMA (Non‑Orthogonal ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0456H04B17/336
CPCH04B7/0456H04B7/0473H04B7/0482H04B17/336Y02D30/70
Inventor 何超何春朱立东王剑
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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