The parameter measurement of gas-liquid two-phase flow has important industrial applications and scientific research significance. In order to realize the measurement of gas-liquid two-phase flow parameters, this paper designs a sensor for capacitively coupled contactless conductivity detection (C4D) based on series resonance technology. Through the analysis and design of the sensor structure, it is not only possible to combine the designed sensor shielding structure, which can weaken the influence of external interference signals; it is also possible to eliminate the influence of capacitive resistance in the measurement through the series resonance technique; and its input and output characteristics are monotonic, which facilitates the measurement of parameters. In order to verify the theoretical linearity of the input and output characteristics of the dual inductance sensor, conductivity measurement experiments were carried out to obtain the result that the sensor is monotonic in input and output characteristics, but not linear in practice. After the demonstration and experiments, the results show that the developed dual inductance sensor validates well and meets the requirements of the detection.
{"title":"Design of a series resonant dual inductor C4D sensor","authors":"Shunzheng Zhang, Fanlin Meng, Xinran Yu, Puyu Yao","doi":"10.1117/12.2682440","DOIUrl":"https://doi.org/10.1117/12.2682440","url":null,"abstract":"The parameter measurement of gas-liquid two-phase flow has important industrial applications and scientific research significance. In order to realize the measurement of gas-liquid two-phase flow parameters, this paper designs a sensor for capacitively coupled contactless conductivity detection (C4D) based on series resonance technology. Through the analysis and design of the sensor structure, it is not only possible to combine the designed sensor shielding structure, which can weaken the influence of external interference signals; it is also possible to eliminate the influence of capacitive resistance in the measurement through the series resonance technique; and its input and output characteristics are monotonic, which facilitates the measurement of parameters. In order to verify the theoretical linearity of the input and output characteristics of the dual inductance sensor, conductivity measurement experiments were carried out to obtain the result that the sensor is monotonic in input and output characteristics, but not linear in practice. After the demonstration and experiments, the results show that the developed dual inductance sensor validates well and meets the requirements of the detection.","PeriodicalId":440430,"journal":{"name":"International Conference on Electronic Technology and Information Science","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117162409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
There are many electrical equipment inside ultra-high voltage converter valve hall, including converter transformer, converter transformer bushing, wall bushing and other typical electrical equipment. Among them, there are many insulation media inside the converter valve hall, including gas insulation, liquid insulation and solid insulation media. For layered medium, there are two problems in the ultra-high voltage converter valve hall: 1) The layered medium in the valve hall includes the interface between different insulating mediums such as the epoxy impregnated paper and oil impregnated paper. The layered interface belongs to the macro category, which can be fully described by applying the classical electromagnetic theory. Its transient process can be characterized by the classical lumped parameter differential equation model, and its time constant scale is around 5000s. Its spatial scale is near cm scale. 2) The layered interface of semiconductor devices inside the valve hall converter belongs to the micro category, with spatial scale in the nm scale and the time scale distributed near the ns dimension. Internal charge and potential distribution can be described by partial differential equations, and the parameters of the differential equations are variables with clear physical quantities. In this paper, firstly, the substrate free of impurities of multi gate MOS capacitors is analyzed from the microscopic carrier level, and the minority carrier term and acceptor impurity concentration Na at any point x near the surface are given. Based on the full mathematical derivation and analysis of the micro particle's sink and sink analytic expressions, the space charge distribution inside the layered insulating medium is obtained, especially at the interface of layered medium. Furthermore, for the electrical equipment inside the converter valve hall, which is subject to the combined action of high voltage and large current, the closed analytical solution of the electro-thermal coupling is derived from the perspective of analytical model through Bessel function, and the quantitative characterization relationship between the leakage current and voltage is obtained. This paper derives full theoretical analytical relationship between the space potential and charge distribution of the layered medium in the UHV converter valve hall from theoretical point of view, which has the good theoretical guidance and the practical application value for operation and maintenance of electrical equipment in the UHV converter valve hall.
{"title":"Full theoretical analysis of space potential and charge distribution in layered medium of UHV converter valve hall from macro and micro levels","authors":"Shi Shiling, Yongshen He, Haoyu Wang, Qian Zhou","doi":"10.1117/12.2682580","DOIUrl":"https://doi.org/10.1117/12.2682580","url":null,"abstract":"There are many electrical equipment inside ultra-high voltage converter valve hall, including converter transformer, converter transformer bushing, wall bushing and other typical electrical equipment. Among them, there are many insulation media inside the converter valve hall, including gas insulation, liquid insulation and solid insulation media. For layered medium, there are two problems in the ultra-high voltage converter valve hall: 1) The layered medium in the valve hall includes the interface between different insulating mediums such as the epoxy impregnated paper and oil impregnated paper. The layered interface belongs to the macro category, which can be fully described by applying the classical electromagnetic theory. Its transient process can be characterized by the classical lumped parameter differential equation model, and its time constant scale is around 5000s. Its spatial scale is near cm scale. 2) The layered interface of semiconductor devices inside the valve hall converter belongs to the micro category, with spatial scale in the nm scale and the time scale distributed near the ns dimension. Internal charge and potential distribution can be described by partial differential equations, and the parameters of the differential equations are variables with clear physical quantities. In this paper, firstly, the substrate free of impurities of multi gate MOS capacitors is analyzed from the microscopic carrier level, and the minority carrier term and acceptor impurity concentration Na at any point x near the surface are given. Based on the full mathematical derivation and analysis of the micro particle's sink and sink analytic expressions, the space charge distribution inside the layered insulating medium is obtained, especially at the interface of layered medium. Furthermore, for the electrical equipment inside the converter valve hall, which is subject to the combined action of high voltage and large current, the closed analytical solution of the electro-thermal coupling is derived from the perspective of analytical model through Bessel function, and the quantitative characterization relationship between the leakage current and voltage is obtained. This paper derives full theoretical analytical relationship between the space potential and charge distribution of the layered medium in the UHV converter valve hall from theoretical point of view, which has the good theoretical guidance and the practical application value for operation and maintenance of electrical equipment in the UHV converter valve hall.","PeriodicalId":440430,"journal":{"name":"International Conference on Electronic Technology and Information Science","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127375056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The fusion of a low spatial resolution hyperspectral image (LR-HSI) and a high spatial resolution multispectral image (HR-MSI) in the same scene is a common method to get a high spatial resolution hyperspectral image (HR-HSI). For the drawback that the standard nuclear norm regularization treats each singular value equally, this paper proposes a weighted nuclear norm model based on sparse matrix factorization (called WNNS) for hyperspectral image fusion. Specifically, we promote the sparsity of fused images by adding the ℓ1 norm of coefficients. Furthermore, to preserve important data components, we combine with the weighted nuclear norm regularization, where different weights are given to singular values. To efficiently solve the proposed model, we apply an alternating direction method of multipliers (ADMM). Experiments show that the proposed method has better performances in terms of numerical results and visual effects.
{"title":"Hyperspectral image fusion via weighted nuclear norm regularized sparse matrix factorization","authors":"Jingjing Lu, Mingxi Ma","doi":"10.1117/12.2682386","DOIUrl":"https://doi.org/10.1117/12.2682386","url":null,"abstract":"The fusion of a low spatial resolution hyperspectral image (LR-HSI) and a high spatial resolution multispectral image (HR-MSI) in the same scene is a common method to get a high spatial resolution hyperspectral image (HR-HSI). For the drawback that the standard nuclear norm regularization treats each singular value equally, this paper proposes a weighted nuclear norm model based on sparse matrix factorization (called WNNS) for hyperspectral image fusion. Specifically, we promote the sparsity of fused images by adding the ℓ1 norm of coefficients. Furthermore, to preserve important data components, we combine with the weighted nuclear norm regularization, where different weights are given to singular values. To efficiently solve the proposed model, we apply an alternating direction method of multipliers (ADMM). Experiments show that the proposed method has better performances in terms of numerical results and visual effects.","PeriodicalId":440430,"journal":{"name":"International Conference on Electronic Technology and Information Science","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127153340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this paper, a non-stationary detection method based on the artificial intelligence algorithm XGBoost is proposed for the detection of the U-value of the vacuum glass. By analyzing the heat transfer characteristics of vacuum glass and considering the detection efficiency, the features are selected as hot end temperature, ambient temperature, and characteristic temperature change rate. In this paper, the training effect of a model is measured comprehensively by the scores of MAE, MSE, and R2. Three models, KNN, GBDT, and XGBoost, are used to train the dataset and compare the prediction results. After the comparison, XGBoost has the best prediction effect. Finally, the fitted model is validated by 5*2 nested cross-loop, and the analysis results show that the fitted model has better stability, which greatly enhances the credibility of the model. After a series of experiments, it is known that the small sample of non-stationary method and multiple interference problems can all be solved by XGBoost algorithm with certain stability, which can provide ideas for further industrialized testing.
{"title":"Prediction of heat transfer performance of vacuum glass based on extreme gradient boosting algorithm","authors":"Feiyu Jia, Yanggang Hu, Lei Wang","doi":"10.1117/12.2682417","DOIUrl":"https://doi.org/10.1117/12.2682417","url":null,"abstract":"In this paper, a non-stationary detection method based on the artificial intelligence algorithm XGBoost is proposed for the detection of the U-value of the vacuum glass. By analyzing the heat transfer characteristics of vacuum glass and considering the detection efficiency, the features are selected as hot end temperature, ambient temperature, and characteristic temperature change rate. In this paper, the training effect of a model is measured comprehensively by the scores of MAE, MSE, and R2. Three models, KNN, GBDT, and XGBoost, are used to train the dataset and compare the prediction results. After the comparison, XGBoost has the best prediction effect. Finally, the fitted model is validated by 5*2 nested cross-loop, and the analysis results show that the fitted model has better stability, which greatly enhances the credibility of the model. After a series of experiments, it is known that the small sample of non-stationary method and multiple interference problems can all be solved by XGBoost algorithm with certain stability, which can provide ideas for further industrialized testing.","PeriodicalId":440430,"journal":{"name":"International Conference on Electronic Technology and Information Science","volume":"12715 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130875431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
High-precision point cloud map is critical for Level 3 and above autonomous vehicles to operate effectively. When autonomous vehicles only use LiDAR to construct the point cloud map, drift deviation will occur in the horizontal and vertical directions, which affects the quality of the constructed map. To solve this issue, this paper proposed a Simultaneous Localization and Mapping (SLAM) framework for outdoor autonomous vehicles based on LiDAR. Firstly, the ground constraint was constructed by the extracted ground point cloud and the standard ground normal vector. Secondly, the preliminary pose was generated by the feature point cloud pose constraint and the ground constraint combined with the uniformly accelerated motion model. Finally, the preliminary pose and similar scene pose transformation detected in loop closure detection were added into the pose graph, and an optimized pose was obtained to construct the point cloud map. The proposed method was evaluated on the MulRan dataset and real scene. The results showed that the proposed method can achieve the positioning deviation within 0.86m and 3.1m respectively in the 3.3km and 7.7km motion range. It was superior to the comparison algorithm in local accuracy and global consistency.
{"title":"Point cloud map construction method based on ground constraint and loop detection","authors":"Guochen Niu, Yujing Xiong, Yibo Tian","doi":"10.1117/12.2682407","DOIUrl":"https://doi.org/10.1117/12.2682407","url":null,"abstract":"High-precision point cloud map is critical for Level 3 and above autonomous vehicles to operate effectively. When autonomous vehicles only use LiDAR to construct the point cloud map, drift deviation will occur in the horizontal and vertical directions, which affects the quality of the constructed map. To solve this issue, this paper proposed a Simultaneous Localization and Mapping (SLAM) framework for outdoor autonomous vehicles based on LiDAR. Firstly, the ground constraint was constructed by the extracted ground point cloud and the standard ground normal vector. Secondly, the preliminary pose was generated by the feature point cloud pose constraint and the ground constraint combined with the uniformly accelerated motion model. Finally, the preliminary pose and similar scene pose transformation detected in loop closure detection were added into the pose graph, and an optimized pose was obtained to construct the point cloud map. The proposed method was evaluated on the MulRan dataset and real scene. The results showed that the proposed method can achieve the positioning deviation within 0.86m and 3.1m respectively in the 3.3km and 7.7km motion range. It was superior to the comparison algorithm in local accuracy and global consistency.","PeriodicalId":440430,"journal":{"name":"International Conference on Electronic Technology and Information Science","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130454090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kai Jiang, Lei Wang, Wen Li, Yongyue Wen, Haiqi Chen
The main components of light fuels such as gasoline, diesel oil and aviation fuel are hydrocarbons, which are almost non-conductive substances with extremely low conductivity. In the process of processing, transportation, storage and filling of light fuel oil, it is easy to accumulate more electrostatic charges, which will lead to major safety accidents such as fire and explosion when electrostatic sparks are generated. Therefore, in order to prevent the occurrence of serious accidents caused by electrostatic accumulation, the conductivity of light fuel oil should be tested regularly during transportation and filling. When the conductivity value is found to be low, an appropriate amount of antistatic agent should be added in time to ensure the safety range of conductivity specified in the Safety Static Conductivity of Oil Products. At the same time, the electrical conductivity of oil products also reflects the number of impurities in oil products. In particular, aviation fuel has stricter requirements on electrical conductivity in order to ensure the sufficiency and safety of its combustion, so it is of great significance to detect the electrical conductivity of light fuel. Aiming at the detection requirements of light fuel conductivity, based on the principle of conductivity detection, a fuel conductivity monitoring system based on STM32 and 4G communication is designed. With STM32 as the master, the oil conductivity value is obtained by detecting the weak current at both ends of the electrode by using the precision electrometer measurement method, and the data is transmitted to the terminal for monitoring through 4G. After testing, the system has high detection sensitivity, low cost and can realize remote monitoring, which provides safety guarantee for oil transportation and provides reference for the design of oil quality monitoring system.
{"title":"Design of fuel conductivity monitoring system based on STM32 and 4G communication","authors":"Kai Jiang, Lei Wang, Wen Li, Yongyue Wen, Haiqi Chen","doi":"10.1117/12.2682519","DOIUrl":"https://doi.org/10.1117/12.2682519","url":null,"abstract":"The main components of light fuels such as gasoline, diesel oil and aviation fuel are hydrocarbons, which are almost non-conductive substances with extremely low conductivity. In the process of processing, transportation, storage and filling of light fuel oil, it is easy to accumulate more electrostatic charges, which will lead to major safety accidents such as fire and explosion when electrostatic sparks are generated. Therefore, in order to prevent the occurrence of serious accidents caused by electrostatic accumulation, the conductivity of light fuel oil should be tested regularly during transportation and filling. When the conductivity value is found to be low, an appropriate amount of antistatic agent should be added in time to ensure the safety range of conductivity specified in the Safety Static Conductivity of Oil Products. At the same time, the electrical conductivity of oil products also reflects the number of impurities in oil products. In particular, aviation fuel has stricter requirements on electrical conductivity in order to ensure the sufficiency and safety of its combustion, so it is of great significance to detect the electrical conductivity of light fuel. Aiming at the detection requirements of light fuel conductivity, based on the principle of conductivity detection, a fuel conductivity monitoring system based on STM32 and 4G communication is designed. With STM32 as the master, the oil conductivity value is obtained by detecting the weak current at both ends of the electrode by using the precision electrometer measurement method, and the data is transmitted to the terminal for monitoring through 4G. After testing, the system has high detection sensitivity, low cost and can realize remote monitoring, which provides safety guarantee for oil transportation and provides reference for the design of oil quality monitoring system.","PeriodicalId":440430,"journal":{"name":"International Conference on Electronic Technology and Information Science","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115222281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Time digital conversion technology has been widely used in the field of measurement technology. A high-resolution, widerange Time-to-Digital-Converter (TDC) circuit is proposed based on Multiplier Delay-Locked Loop (MDLL) and Time Amplifier (TA). In this paper, a two-segment combination structure is adopted to obtain a wide range by using the cycle counting method in the high segment, and to take into account the high resolution by using the time amplification technique in the middle and low segments. Finally, a TDC circuit with a range of 500 ps ~ 4 us and a resolution of 18 ps is presented.
{"title":"Design of high-resolution and wide-range time-to-digital converter","authors":"Xiaohu Wang, C. Wu","doi":"10.1117/12.2682326","DOIUrl":"https://doi.org/10.1117/12.2682326","url":null,"abstract":"Time digital conversion technology has been widely used in the field of measurement technology. A high-resolution, widerange Time-to-Digital-Converter (TDC) circuit is proposed based on Multiplier Delay-Locked Loop (MDLL) and Time Amplifier (TA). In this paper, a two-segment combination structure is adopted to obtain a wide range by using the cycle counting method in the high segment, and to take into account the high resolution by using the time amplification technique in the middle and low segments. Finally, a TDC circuit with a range of 500 ps ~ 4 us and a resolution of 18 ps is presented.","PeriodicalId":440430,"journal":{"name":"International Conference on Electronic Technology and Information Science","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127701627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Currently, tunnel shotcrete operations are mainly completed through remote control of the shotcrete machine by operators, and the process is not automated or intelligent enough. To address this issue, we propose an automatic trajectory planning algorithm for tunnel shotcrete robots. The algorithm takes the cumulative thickness model of the shotcrete and information on the tunnel surface thickness as inputs, and discretizes the shotcrete process by rasterizing the tunnel surface. The algorithm's optimization objective is the shotcrete thickness, and we propose an improved gradient descent method to optimize the shotcrete velocity while optimizing the shotcrete path. To improve the algorithm's performance in multi-round shotcrete, we introduce the shotcrete time continuation strategy and the shotcrete path drift strategy. Simulation results demonstrate that the algorithm offers a shorter solution time and guarantees the smoothness of the tunnel surface.
{"title":"Trajectory planning algorithm and simulation of tunnel shotcrete robot","authors":"Guowei Hou, Wenjie Qiu, Qing Cheng","doi":"10.1117/12.2682364","DOIUrl":"https://doi.org/10.1117/12.2682364","url":null,"abstract":"Currently, tunnel shotcrete operations are mainly completed through remote control of the shotcrete machine by operators, and the process is not automated or intelligent enough. To address this issue, we propose an automatic trajectory planning algorithm for tunnel shotcrete robots. The algorithm takes the cumulative thickness model of the shotcrete and information on the tunnel surface thickness as inputs, and discretizes the shotcrete process by rasterizing the tunnel surface. The algorithm's optimization objective is the shotcrete thickness, and we propose an improved gradient descent method to optimize the shotcrete velocity while optimizing the shotcrete path. To improve the algorithm's performance in multi-round shotcrete, we introduce the shotcrete time continuation strategy and the shotcrete path drift strategy. Simulation results demonstrate that the algorithm offers a shorter solution time and guarantees the smoothness of the tunnel surface.","PeriodicalId":440430,"journal":{"name":"International Conference on Electronic Technology and Information Science","volume":"171 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115541456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In a multi-cell and multi-user cellular system, the communication quality of users is seriously affected due to the existence of inter-cell interference (ICI) and inter-user interference (IUI).As an interference management technology, interference alignment (IA) can not only eliminate interference, but also greatly improve the degree of freedom of the system, that is, improve the system capacity.This paper proposes a three-cell multi-user grouping interference alignment algorithm,which first groups the users of the three cells,converts the complex interference channel into a simple communication channel,and then eliminates the inter-user interference by transmitting beamforming matrix, and eliminates inter-cell interference by designing the receiving beamforming matrix.When calculating the transmitting beamforming matrix, the multi-matrix connected at the transmitter and solved by the eigenvector.When calculating the receiving beamforming matrix, the receiving beamforming matrix is obtained by using the inverse property of the matrix.Compared with the traditional method of solving the transmitting beamforming matrix and the receiving beamforming matrix, the complexity of the algorithm is greatly reduced.And the simulation shows that the algorithm has a better sum rate than the traditional interference alignment algorithm under the same signal-to-noise ratio (SNR).
{"title":"Research on interference alignment algorithm based on user grouping","authors":"Xiaojuan Bai, Hongjuan Zhang","doi":"10.1117/12.2682380","DOIUrl":"https://doi.org/10.1117/12.2682380","url":null,"abstract":"In a multi-cell and multi-user cellular system, the communication quality of users is seriously affected due to the existence of inter-cell interference (ICI) and inter-user interference (IUI).As an interference management technology, interference alignment (IA) can not only eliminate interference, but also greatly improve the degree of freedom of the system, that is, improve the system capacity.This paper proposes a three-cell multi-user grouping interference alignment algorithm,which first groups the users of the three cells,converts the complex interference channel into a simple communication channel,and then eliminates the inter-user interference by transmitting beamforming matrix, and eliminates inter-cell interference by designing the receiving beamforming matrix.When calculating the transmitting beamforming matrix, the multi-matrix connected at the transmitter and solved by the eigenvector.When calculating the receiving beamforming matrix, the receiving beamforming matrix is obtained by using the inverse property of the matrix.Compared with the traditional method of solving the transmitting beamforming matrix and the receiving beamforming matrix, the complexity of the algorithm is greatly reduced.And the simulation shows that the algorithm has a better sum rate than the traditional interference alignment algorithm under the same signal-to-noise ratio (SNR).","PeriodicalId":440430,"journal":{"name":"International Conference on Electronic Technology and Information Science","volume":"225 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116206980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The Direct Position Determination (DPD) method can obtain the motion state information of the target directly from the signal received by the base station without measuring the positioning parameters in the first place, so it can provide more accurate positioning estimation. In order to solve the problem that the interferometer system’s positioning error increases or even fails to locate when the signal-to-noise ratio is low, a DPD method based on the interferometer system is proposed. Based on the information of time difference and phase difference, a cost function was constructed based on the principle of maximum likelihood estimation. Simulation analysis shows that the proposed positioning method is also effective under the condition of low signal-to-noise ratio.
直接定位(Direct Position Determination, DPD)方法可以直接从基站接收到的信号中获取目标的运动状态信息，而无需首先测量定位参数，因此可以提供更准确的定位估计。为了解决低信噪比时干涉仪系统定位误差增大甚至无法定位的问题，提出了一种基于干涉仪系统的DPD方法。根据时差和相位差信息，基于极大似然估计原理构造了代价函数。仿真分析表明，该定位方法在低信噪比条件下也是有效的。
{"title":"Research on direct position determination method based on interferometer system","authors":"Jingwen Zhang, Chundong Qi","doi":"10.1117/12.2682325","DOIUrl":"https://doi.org/10.1117/12.2682325","url":null,"abstract":"The Direct Position Determination (DPD) method can obtain the motion state information of the target directly from the signal received by the base station without measuring the positioning parameters in the first place, so it can provide more accurate positioning estimation. In order to solve the problem that the interferometer system’s positioning error increases or even fails to locate when the signal-to-noise ratio is low, a DPD method based on the interferometer system is proposed. Based on the information of time difference and phase difference, a cost function was constructed based on the principle of maximum likelihood estimation. Simulation analysis shows that the proposed positioning method is also effective under the condition of low signal-to-noise ratio.","PeriodicalId":440430,"journal":{"name":"International Conference on Electronic Technology and Information Science","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125570047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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