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For the optimal feature subset selection and model parameter optimization in ultra-wideband non-line-of-sight(NLOS) recognition,a new NLOS recognition method based on the cross-validation recursive feature elimination algorithm of Light Gradient Boosting Machine(LightGBM) and Optuna parameter tuning is proposed. First,six important features,including the difference between the first path signal and the total received signal power,and the maximum noise,are selected as the optimal feature subset using the recursive feature elimination and cross-validation algorithm. Then,Optuna is used to optimize the hyperparameters of LightGBM model. Line-of-sight and non-line-of-sight feature data is collected,and the Support Vector Machine,Extreme Gradient Boosting algorithm,and parameter-optimized LightGBM model are trained and tested. The results demonstrate that the selected features exhibit excellent discriminative ability,with the optimized LightGBM model achieving a recognition accuracy of 95.28% .
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针对超宽带非视距(Non-Line-of-Sight,NLOS)识别中最优特征子集选取与模型参数优化问题,提出了一种基于轻量级梯度提升机(Light Gradient Boosting Machine,LightGBM)的交叉验证递归特征消除算法与Optuna参数调优相结合的NLOS识别方法。首先通过递归特征消除加交叉验证算法分析选取首径信号与总信号接收功率差值、噪声最大值等6个重要特征作为最优特征子集,之后使用Optuna调参框架优化LightGBM模型超参数。采集视距与非视距特征数据,使用支持向量机、极限梯度提升算法和参数优化后的LightGBM等模型进行训练与测试,结果表明,所选取特征具有良好区分性,参数优化后的LightGBM模型识别准确率达95.28%。
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李乾 男,1984年生于吉林磐石,2006年获学士学位,现为高级工程师,主要从事电力电缆研究与应用、电缆隧道智能监测技术方面的工作。
刘卓伦 男,1999年生于河北石家庄,2021年获学士学位,现为硕士研究生,主要研究方向为超宽带室内定位技术。
孙晓云 女,1971年生于河北晋州,2000年获博士学位,现为教授,主要研究方向为电缆隧道环境智能监测技术、大型电器设备无损检测、电机电器智能控制。
陈勇 男,1978年生于河北,博士,副研究员,主要研究方向为超宽带室内精确定位技术、超宽带非视距识别与缓解等。
宋士济 男,1999年出生于河北石家庄,2021年获学士学位,现为硕士研究生,主要研究方向为目标检测技术。
张醒龙 男,2001年出生于天津,2023年获学士学位,现为硕士研究生,主要研究方向为超宽带室内定位技术。
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1国网河北省电力有限公司石家庄供电分公司,石家庄 050004, bio={"content":"
李乾 男,1984年生于吉林磐石,2006年获学士学位,现为高级工程师,主要从事电力电缆研究与应用、电缆隧道智能监测技术方面的工作。
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李乾 男,1984年生于吉林磐石,2006年获学士学位,现为高级工程师,主要从事电力电缆研究与应用、电缆隧道智能监测技术方面的工作。
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2石家庄铁道大学 电气与电子工程学院,石家庄 050043, bio={"content":"
刘卓伦 男,1999年生于河北石家庄,2021年获学士学位,现为硕士研究生,主要研究方向为超宽带室内定位技术。
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刘卓伦 男,1999年生于河北石家庄,2021年获学士学位,现为硕士研究生,主要研究方向为超宽带室内定位技术。
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2石家庄铁道大学 电气与电子工程学院,石家庄 050043, bio={"content":"
孙晓云 女,1971年生于河北晋州,2000年获博士学位,现为教授,主要研究方向为电缆隧道环境智能监测技术、大型电器设备无损检测、电机电器智能控制。
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孙晓云 女,1971年生于河北晋州,2000年获博士学位,现为教授,主要研究方向为电缆隧道环境智能监测技术、大型电器设备无损检测、电机电器智能控制。
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2石家庄铁道大学 电气与电子工程学院,石家庄 050043, bio={"content":"
陈勇 男,1978年生于河北,博士,副研究员,主要研究方向为超宽带室内精确定位技术、超宽带非视距识别与缓解等。
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陈勇 男,1978年生于河北,博士,副研究员,主要研究方向为超宽带室内精确定位技术、超宽带非视距识别与缓解等。
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2石家庄铁道大学 电气与电子工程学院,石家庄 050043, bio={"content":"
宋士济 男,1999年出生于河北石家庄,2021年获学士学位,现为硕士研究生,主要研究方向为目标检测技术。
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宋士济 男,1999年出生于河北石家庄,2021年获学士学位,现为硕士研究生,主要研究方向为目标检测技术。
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2石家庄铁道大学 电气与电子工程学院,石家庄 050043, bio={"content":"
张醒龙 男,2001年出生于天津,2023年获学士学位,现为硕士研究生,主要研究方向为超宽带室内定位技术。
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张醒龙 男,2001年出生于天津,2023年获学士学位,现为硕士研究生,主要研究方向为超宽带室内定位技术。
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| 特征名称 | 特征描述 |
|---|
| FP_IDX | 首径采样点位置 |
| MAX_NOISE | 噪声最大值 |
| FPAMP1 | 首径采样点1的振幅值 |
| FPAMP2 | 首径采样点+2处的振幅值 |
| FPAMP3 | 首径采样点+3处的振幅值 |
| STDEV_NOISE | 噪声标准差 |
| maxGrowthCIR | CIR最大增幅 |
| rxPreamCount | 累计前导码数量 |
| LDE_PPINDX | LDE峰值路径位置 |
| LDE_PPAMPL | LDE峰值路径振幅 |
| FP_L | 首径功率 |
| RX_L | 总接收功率 |
| PD | 首径与接收信号功率差值 |
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特征信息
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| 特征名称 | 特征描述 |
|---|
| FP_IDX | 首径采样点位置 |
| MAX_NOISE | 噪声最大值 |
| FPAMP1 | 首径采样点1的振幅值 |
| FPAMP2 | 首径采样点+2处的振幅值 |
| FPAMP3 | 首径采样点+3处的振幅值 |
| STDEV_NOISE | 噪声标准差 |
| maxGrowthCIR | CIR最大增幅 |
| rxPreamCount | 累计前导码数量 |
| LDE_PPINDX | LDE峰值路径位置 |
| LDE_PPAMPL | LDE峰值路径振幅 |
| FP_L | 首径功率 |
| RX_L | 总接收功率 |
| PD | 首径与接收信号功率差值 |
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| 参数名称 | 具体值 |
|---|
| max_depth | 9 |
| num_leaves | 79 |
| learning_rate | 0.074 |
| reg_alpha | 0.596 |
| reg_lambda | 0.363 |
| n_estimators | 831 |
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优化后超参数值
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| 参数名称 | 具体值 |
|---|
| max_depth | 9 |
| num_leaves | 79 |
| learning_rate | 0.074 |
| reg_alpha | 0.596 |
| reg_lambda | 0.363 |
| n_estimators | 831 |
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| 项目 | 预测值 |
|---|
| NLOS | LOS |
|---|
| 真实值 | NLOS | TP | FN |
| LOS | FP | TN |
), ArticleFig(id=1251226700017779582, tenantId=1146029695717560320, journalId=1251194772300279900, articleId=1251226684486271365, language=CN, label=表3, caption=
混淆矩阵
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| NLOS | LOS |
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| 真实值 | NLOS | TP | FN |
| LOS | FP | TN |
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