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一种无人机数据链信道选择和功率控制方法

张文秋 丁文锐 刘春辉

张文秋, 丁文锐, 刘春辉等 . 一种无人机数据链信道选择和功率控制方法[J]. 北京航空航天大学学报, 2017, 43(3): 583-591. doi: 10.13700/j.bh.1001-5965.2016.0166
引用本文: 张文秋, 丁文锐, 刘春辉等 . 一种无人机数据链信道选择和功率控制方法[J]. 北京航空航天大学学报, 2017, 43(3): 583-591. doi: 10.13700/j.bh.1001-5965.2016.0166
ZHANG Wenqiu, DING Wenrui, LIU Chunhuiet al. A channel selection and power control method of UAV data link[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(3): 583-591. doi: 10.13700/j.bh.1001-5965.2016.0166(in Chinese)
Citation: ZHANG Wenqiu, DING Wenrui, LIU Chunhuiet al. A channel selection and power control method of UAV data link[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(3): 583-591. doi: 10.13700/j.bh.1001-5965.2016.0166(in Chinese)

一种无人机数据链信道选择和功率控制方法

doi: 10.13700/j.bh.1001-5965.2016.0166
基金项目: 

国家“863”计划 2013AA122101

详细信息
    作者简介:

    张文秋, 女, 硕士研究生。主要研究方向:信号与信息处理

    丁文锐, 女, 博士, 研究员, 博士生导师。主要研究方向:图像处理和自适应信号处理

    刘春辉, 男, 博士, 工程师。主要研究方向:自适应信号处理

    通讯作者:

    丁文锐, E-mail:ding@buaa.edu.cn

  • 中图分类号: TN973

A channel selection and power control method of UAV data link

Funds: 

National High-tech Research and Development Program of China 2013AA122101

More Information
  • 摘要:

    无人机(UAV)数据链在复杂电磁和地理自然环境中可靠性受到严重威胁,针对如何通过选择信道和调整信号发送功率保证UAV通信质量的问题,提出了一种结合相关向量回归(RVR)的信道选择和功率控制方法。方法采用RVR建立干扰信息、误码率(BER)与信噪比(SNR)的映射模型,通过该模型可根据实时干扰参数,预测信道满足UAV数据链BER要求的最小化SNR,进而可计算最小化的发送功率,把最小化功率作为标准判断信道质量好坏,选择信道的同时确定发送功率,简化过程,以最小化信道发送功率达到抗干扰的目的。仿真实验证明,该方法能够有效选择可用信道并调整发送功率,抑制干扰,时间和能量开销低,具有较强实用性。

     

  • 图 1  随机二元码干扰BER仿真

    Figure 1.  BER simulation of random binary code interference

    图 2  无人机数据链信道选择与功率控制方法示意图

    Figure 2.  Schematic of a channel selection and power control method for UAV data link

    图 3  SNR预测模型建立流程图

    Figure 3.  Flowchart of SNR prediction model establishment

    图 4  各信道预测发送功率最小值pmin

    Figure 4.  Minimum predicted transmit power pmin for every channel

    图 5  各信道误码率的RPE值

    Figure 5.  RPE value of BER for every channel

    图 6  仿真实验地理环境

    Figure 6.  Geographical environment of simulation experiment

    图 7  干扰功率分布

    Figure 7.  Distribution of interference power

    图 8  各信道预测SNR与飞行距离的关系

    Figure 8.  Relationship between predicted SNR and flight distance for every channel

    图 9  各信道pmin与飞行距离的关系

    Figure 9.  Relationship between pmin and flight distance for every channel

    表  1  RVR和SVR训练结果

    Table  1.   Training results of RVR and SVR

    训练结果 RVR SVR
    高斯 5阶多项式 Laplace RBF 多项式
    RVs,SVs 71 73 3 564 604 1 404
    RMSE 0.023 1 0.020 3 0.062 6 0.074 0.58
    RPE/% 0.198 0.180 0.325 0.887 5.17
    下载: 导出CSV

    表  2  采用PCA降维后RVR训练结果

    Table  2.   Training results of RVR after dimensionality reduction using PCA

    训练结果 RVR (高斯核函数)
    特征向量为6维 特征向量为5维 特征向量为4维
    RMSE 0.301 0.302 6.479
    RPE/% 4.30 4.56 24.65
    下载: 导出CSV

    表  3  不同标准下的信道质量排序

    Table  3.   Channel quality ranking based on different criteria

    INR1/dB pmin标准 SINR标准 BER标准
    -6~-2.5 1-4-3-5-2 1-4-3-5-2 1-4-3-5-2
    -2.5~-1.5 1-4-3-5-2 1-4-3-2-5 1-4-3-5-2
    -1.5~0 1-4-5-3-2 1-4-3-2-5 1-4-5-3-2
    0~0.5 1-4-5-2-3 1-4-3-2-5 1-4-5-2-3
    0.5~2 1-4-5-2-3 1-4-2-3-5 1-4-5-2-3
    2~3.5 1-4-2-5-3 1-4-2-3-5 1-4-2-5-3
    3.5~6 1-4-2-5-3 1-4-2-5-3 1-4-2-5-3
    下载: 导出CSV

    表  4  信道检测次数对比

    Table  4.   Comparison of channel detected iterations

    检测方法 不考虑信道5 考虑信道5
    随机检测 相关检测 随机检测 相关检测
    检测次数 1.67 1.5 2 1.6
    下载: 导出CSV

    表  5  信道选择和功率控制方法仿真结果

    Table  5.   Simulation results of channel selection and power control method

    信道 位置1 位置2 位置3 位置4 位置5 位置6
    pmin/dBm BER/dB pmin/dBm BER/dB pmin/dBm BER/dB pmin/dBm BER/dB pmin/dBm BER/dB pmin/dBm BER/dB
    1 18.72 -1.98 15.12 -1.93 11.80 -1.97 13.55 -1.96 17.39 -1.99 20.40 -2.00
    2 27.49 -1.94 25.56 -1.99 24.27 -1.98 25.69 -2.01 27.74 -2.00 29.91 -2.00
    3 25.77 -2.02 22.74 -1.98 20.23 -2.01 23.09 -2.01 28.74 -2.02 34.08 -1.98
    4 23.60 -1.99 20.07 -2.02 16.84 -2.01 18.69 -2.01 23.00 -2.02 26.98 -2.00
    5 30.22 -1.99 26.62 -2.00 23.28 -1.99 24.94 -2.00 28.77 -1.98 31.78 -1.98
    注:BER取对数,故单位为dB。
    下载: 导出CSV
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出版历程
  • 收稿日期:  2016-03-07
  • 录用日期:  2016-06-03
  • 刊出日期:  2017-03-20

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