Pub Date : 2022-11-11DOI: 10.1109/ICCT56141.2022.10073420
Zhen Liao, Mingze Xu
With the rapid development of wireless network, the requirement of time accuracy has become higher for every node in network. Thus, the high precision time synchronization is an important condition to ensure the high-quality service of wireless network. In order to meet the requirement of time synchronization, the research of wireless timing technology has drawn the attention. In the time synchronization system based on wireless network, due to the flexibility and convenience in different scenarios, the timing protocol can be widely used in different scenarios. However, the inherent shortcomings of wireless systems such as multipath interference also limits the further improvement of time synchronization performance. Therefore, this paper proposes an enhanced timestamp algorithm and its implementation scheme to solve the problem of the time synchronization system's accuracy in the wireless network. The proposed scheme can estimate the timestamp of physical layer in the time synchronization protocol through the synchronization sequence in the wireless system, and improve the sampling accuracy of the timestamp through the iterative algorithm based on the correlation window. Finally, according to the experimental results, this paper shows the performance of the enhanced algorithm and the traditional method, which can prove the proposed algorithm can solve the inherent problems of wireless channel and improve the accuracy of timestamp effectively.
{"title":"Research on Time Synchronization System of Wireless Network","authors":"Zhen Liao, Mingze Xu","doi":"10.1109/ICCT56141.2022.10073420","DOIUrl":"https://doi.org/10.1109/ICCT56141.2022.10073420","url":null,"abstract":"With the rapid development of wireless network, the requirement of time accuracy has become higher for every node in network. Thus, the high precision time synchronization is an important condition to ensure the high-quality service of wireless network. In order to meet the requirement of time synchronization, the research of wireless timing technology has drawn the attention. In the time synchronization system based on wireless network, due to the flexibility and convenience in different scenarios, the timing protocol can be widely used in different scenarios. However, the inherent shortcomings of wireless systems such as multipath interference also limits the further improvement of time synchronization performance. Therefore, this paper proposes an enhanced timestamp algorithm and its implementation scheme to solve the problem of the time synchronization system's accuracy in the wireless network. The proposed scheme can estimate the timestamp of physical layer in the time synchronization protocol through the synchronization sequence in the wireless system, and improve the sampling accuracy of the timestamp through the iterative algorithm based on the correlation window. Finally, according to the experimental results, this paper shows the performance of the enhanced algorithm and the traditional method, which can prove the proposed algorithm can solve the inherent problems of wireless channel and improve the accuracy of timestamp effectively.","PeriodicalId":294057,"journal":{"name":"2022 IEEE 22nd International Conference on Communication Technology (ICCT)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117109863","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}
Controller Area Network (CAN) is a bus standard commonly used in the automotive industry. A large number of researches have been carried out on the identity authentication and intrusion detection technology of the in-vehicle network for attacks. This paper presents a method to extract the voltage of CAN bus terminal to obtain the equipment fingerprint. The method identifies different ECUs by measuring the voltage difference on the vehicle network, selects features only from the time domain and detects based on a single frame. This paper mainly focuses on the influence of temperature on the fingerprint of CAN bus terminal. By using a high and low temperature test chamber to simulate different temperature environments during vehicle operation, a large number of CAN frames have been collected for fingerprint extraction. By studying the relationship between temperature and CAN bus terminal fingerprint, the influence of temperature on fingerprint has been compensated. After temperature linear compensation, the recognition rate of voltage-based CAN bus terminal fingerprint extraction increases from 71.2% to 87.6% at 0–80 °C.
{"title":"Research on Terminal Fingerprint Extraction and Temperature Adaptability Based on CAN Bus","authors":"Wei Fang, Jiabao Yu, Yanjun Ding, Xiaozhong Hu, Sheng Li, Aiqun Hu","doi":"10.1109/ICCT56141.2022.10073172","DOIUrl":"https://doi.org/10.1109/ICCT56141.2022.10073172","url":null,"abstract":"Controller Area Network (CAN) is a bus standard commonly used in the automotive industry. A large number of researches have been carried out on the identity authentication and intrusion detection technology of the in-vehicle network for attacks. This paper presents a method to extract the voltage of CAN bus terminal to obtain the equipment fingerprint. The method identifies different ECUs by measuring the voltage difference on the vehicle network, selects features only from the time domain and detects based on a single frame. This paper mainly focuses on the influence of temperature on the fingerprint of CAN bus terminal. By using a high and low temperature test chamber to simulate different temperature environments during vehicle operation, a large number of CAN frames have been collected for fingerprint extraction. By studying the relationship between temperature and CAN bus terminal fingerprint, the influence of temperature on fingerprint has been compensated. After temperature linear compensation, the recognition rate of voltage-based CAN bus terminal fingerprint extraction increases from 71.2% to 87.6% at 0–80 °C.","PeriodicalId":294057,"journal":{"name":"2022 IEEE 22nd International Conference on Communication Technology (ICCT)","volume":"26 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124487393","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}
Pub Date : 2022-11-11DOI: 10.1109/ICCT56141.2022.10073387
Yang Wang, Zhikui Ouyang, Runhua Han, Zhijian Yin, Zhen Yang
In this paper, we propose a real-time framework for instance segmentation, which we call YOLOMask and which builds on the real-time project OrienMask. In YOLOMask, we integrate the YOLOv5 object detection framework with the OrienMask instance segmentation framework to form a new real-time instance segmentation framework and we integrate CBAM into YOLOMask, which can help the network to find regions of interest in images with large area coverage. Using this method, our YOLOMask can achieve 47.8/44.3 msak/box AP on Pascal 2012 SBD dataset evaluated at 84.3 fps with a V100 GPU. Compared to OrienMask, YOLOMask improves box AP by about 5.8% and mask AP by 4.5%, which is encouraging and competitive. Given its simplicity and efficiency, we hope that our YOLOMask can serve as a simple but strong baseline for a variety of instance-wise prediction tasks.
{"title":"YOLOMask: Real-time Instance Segmentation With Integrating YOLOv5 and OrienMask","authors":"Yang Wang, Zhikui Ouyang, Runhua Han, Zhijian Yin, Zhen Yang","doi":"10.1109/ICCT56141.2022.10073387","DOIUrl":"https://doi.org/10.1109/ICCT56141.2022.10073387","url":null,"abstract":"In this paper, we propose a real-time framework for instance segmentation, which we call YOLOMask and which builds on the real-time project OrienMask. In YOLOMask, we integrate the YOLOv5 object detection framework with the OrienMask instance segmentation framework to form a new real-time instance segmentation framework and we integrate CBAM into YOLOMask, which can help the network to find regions of interest in images with large area coverage. Using this method, our YOLOMask can achieve 47.8/44.3 msak/box AP on Pascal 2012 SBD dataset evaluated at 84.3 fps with a V100 GPU. Compared to OrienMask, YOLOMask improves box AP by about 5.8% and mask AP by 4.5%, which is encouraging and competitive. Given its simplicity and efficiency, we hope that our YOLOMask can serve as a simple but strong baseline for a variety of instance-wise prediction tasks.","PeriodicalId":294057,"journal":{"name":"2022 IEEE 22nd International Conference on Communication Technology (ICCT)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126151570","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}
Pub Date : 2022-11-11DOI: 10.1109/ICCT56141.2022.10072722
Jianyang Ding, Yong Wang, Shaozhong Fu, H. Chen, Wendong Xie, Yunsong Liu
Device-free and passive indoor localization based on WiFi channel state information (CSI) has attracted a great deal of research interest and yielded a broad range of related applications. However, most of existing approaches are influenced heavily by random noises, and also they fail in the presence of multiple users in the same area. In this paper, we present an accurate indoor localization scheme for multiple users using BP neural network deployed on commodity WiFi. To this end, this proposed approach mainly exploits three key techniques. Firstly, we carry out data preprocessing to obtain informative signals and then eliminate the random noises present in CSI measurements. Secondly, feature extraction is conducted to characterize multi-user profiles through combining data fusion and singular value decomposition (SVD) methods. Finally, BP neural networks is introduced to learn these features extracted and realizes the goal of multi-user localization. Furthermore, we implement the proposed approach on a set of WiFi devices and further evaluate it in typical indoor scenario. The experimental results relying on real-world data show that this approach can achieve a satisfactory performance in multi-user localization compared with existing approaches.
{"title":"WiFi Fingerprint-Based Multi-user Localization for Smart Home by WiFi Sensing","authors":"Jianyang Ding, Yong Wang, Shaozhong Fu, H. Chen, Wendong Xie, Yunsong Liu","doi":"10.1109/ICCT56141.2022.10072722","DOIUrl":"https://doi.org/10.1109/ICCT56141.2022.10072722","url":null,"abstract":"Device-free and passive indoor localization based on WiFi channel state information (CSI) has attracted a great deal of research interest and yielded a broad range of related applications. However, most of existing approaches are influenced heavily by random noises, and also they fail in the presence of multiple users in the same area. In this paper, we present an accurate indoor localization scheme for multiple users using BP neural network deployed on commodity WiFi. To this end, this proposed approach mainly exploits three key techniques. Firstly, we carry out data preprocessing to obtain informative signals and then eliminate the random noises present in CSI measurements. Secondly, feature extraction is conducted to characterize multi-user profiles through combining data fusion and singular value decomposition (SVD) methods. Finally, BP neural networks is introduced to learn these features extracted and realizes the goal of multi-user localization. Furthermore, we implement the proposed approach on a set of WiFi devices and further evaluate it in typical indoor scenario. The experimental results relying on real-world data show that this approach can achieve a satisfactory performance in multi-user localization compared with existing approaches.","PeriodicalId":294057,"journal":{"name":"2022 IEEE 22nd International Conference on Communication Technology (ICCT)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126165525","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}
Pub Date : 2022-11-11DOI: 10.1109/ICCT56141.2022.10072477
Jiahe Zhao, Hui Li, Feiyang Liu
In Optical Network-on-Chip (ONoC), both routing and wavelength assignment have an impact on the Optical Signal-to-Noise (OSNR), which further influence the power efficiency and scalability. In this work, we propose a multidimensional Integrated RWA method based on the fuzzy logic system (named as I-RWA) which considers routing and wavelength assignment. OSNR, traffic distribution, waiting delay and wavelength utilization are taken into consideration at the same time. The effect of wavelength assignment on OSNR is also discussed. The evaluation results show that the proposed method I-RWA can obtain the best performance in OSNR and is feasible to be adapted for other more performance factors.
{"title":"A Fuzzy Logic System-Based Multidimensional Integrated Routing and Wavelength Assignment Method in Optical Network-on-Chip (ONoC)","authors":"Jiahe Zhao, Hui Li, Feiyang Liu","doi":"10.1109/ICCT56141.2022.10072477","DOIUrl":"https://doi.org/10.1109/ICCT56141.2022.10072477","url":null,"abstract":"In Optical Network-on-Chip (ONoC), both routing and wavelength assignment have an impact on the Optical Signal-to-Noise (OSNR), which further influence the power efficiency and scalability. In this work, we propose a multidimensional Integrated RWA method based on the fuzzy logic system (named as I-RWA) which considers routing and wavelength assignment. OSNR, traffic distribution, waiting delay and wavelength utilization are taken into consideration at the same time. The effect of wavelength assignment on OSNR is also discussed. The evaluation results show that the proposed method I-RWA can obtain the best performance in OSNR and is feasible to be adapted for other more performance factors.","PeriodicalId":294057,"journal":{"name":"2022 IEEE 22nd International Conference on Communication Technology (ICCT)","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124664196","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}
Pub Date : 2022-11-11DOI: 10.1109/ICCT56141.2022.10073440
Yue Li, Guomei Zhang, Jiayue Yu, Guobing Li, Yiheng Li
To get higher utilization efficiency of spectrum and orbits in low earth orbit (LEO) satellite system, satellite communication and navigation integration has become a search hotspot recently. Because orthogonal time frequency space (OTFS) modulation can reduce the effect of time-frequency doubly selective channels between the LEO satellite and earth, an OTFS-based communication and navigation integrated scheme is studied in this paper. First, a hybrid modulation constellation by superimposing quadrature amplitude modulation (QAM) and dual-code alternating binary offset carrier (AltBOC) modulation is proposed to realize signal integration of two systems. Second, a serial interference cancellation (SIC) detector is designed to separate two signals. In addition, a direct path time delay estimator based on pseudo-range code measurement is designed. What's more, the BER performance of the integrated signal is derived. Simulation results demonstrates that the proposed scheme has the lower BER and the higher localization accuracy than the baseline method under a LEO scenario with doubly selective channel.
{"title":"OTFS-Based Communication and Navigation Integrated Signal Transmission for LEO Satellites","authors":"Yue Li, Guomei Zhang, Jiayue Yu, Guobing Li, Yiheng Li","doi":"10.1109/ICCT56141.2022.10073440","DOIUrl":"https://doi.org/10.1109/ICCT56141.2022.10073440","url":null,"abstract":"To get higher utilization efficiency of spectrum and orbits in low earth orbit (LEO) satellite system, satellite communication and navigation integration has become a search hotspot recently. Because orthogonal time frequency space (OTFS) modulation can reduce the effect of time-frequency doubly selective channels between the LEO satellite and earth, an OTFS-based communication and navigation integrated scheme is studied in this paper. First, a hybrid modulation constellation by superimposing quadrature amplitude modulation (QAM) and dual-code alternating binary offset carrier (AltBOC) modulation is proposed to realize signal integration of two systems. Second, a serial interference cancellation (SIC) detector is designed to separate two signals. In addition, a direct path time delay estimator based on pseudo-range code measurement is designed. What's more, the BER performance of the integrated signal is derived. Simulation results demonstrates that the proposed scheme has the lower BER and the higher localization accuracy than the baseline method under a LEO scenario with doubly selective channel.","PeriodicalId":294057,"journal":{"name":"2022 IEEE 22nd International Conference on Communication Technology (ICCT)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125033675","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}
Pub Date : 2022-11-11DOI: 10.1109/ICCT56141.2022.10072778
Kang Zheng, Hao Gao, Shuai Cui, Jiaheng Wang, Yongming Huang
In massive multiple-input multiple-output (MIMO) systems, linear equalizers such as zero-forcing (ZF) and minimum mean-square error (MMSE) equalizers are often used and implemented in a centralized way. As the antenna number increases, the centralized equalization requires a huge data exchange rate as well as intensive central processing capability. Decentralized equalization can alleviate this bottleneck by partitioning the antenna array into multiple clusters and conducting equalization separately and locally. In this paper, we design a decentralized MMSE equalizer based on the chain architecture. The proposed equalizer is conducted in a recursive manner through a chain and generates a sequence of estimated signals that converge to the MMSE solution. Furthermore, we also propose an early termination strategy according to channel quality, thus reducing complexity and data exchange rate. Simulation results illustrate that the proposed recursive MMSE equalizer outperforms the existing decentralized equalizer, and achieves the same BER performance as the centralized MMSE equalizer with a lower data exchange rate.
{"title":"Decentralized Recursive MMSE Equalizer for Massive MIMO Systems","authors":"Kang Zheng, Hao Gao, Shuai Cui, Jiaheng Wang, Yongming Huang","doi":"10.1109/ICCT56141.2022.10072778","DOIUrl":"https://doi.org/10.1109/ICCT56141.2022.10072778","url":null,"abstract":"In massive multiple-input multiple-output (MIMO) systems, linear equalizers such as zero-forcing (ZF) and minimum mean-square error (MMSE) equalizers are often used and implemented in a centralized way. As the antenna number increases, the centralized equalization requires a huge data exchange rate as well as intensive central processing capability. Decentralized equalization can alleviate this bottleneck by partitioning the antenna array into multiple clusters and conducting equalization separately and locally. In this paper, we design a decentralized MMSE equalizer based on the chain architecture. The proposed equalizer is conducted in a recursive manner through a chain and generates a sequence of estimated signals that converge to the MMSE solution. Furthermore, we also propose an early termination strategy according to channel quality, thus reducing complexity and data exchange rate. Simulation results illustrate that the proposed recursive MMSE equalizer outperforms the existing decentralized equalizer, and achieves the same BER performance as the centralized MMSE equalizer with a lower data exchange rate.","PeriodicalId":294057,"journal":{"name":"2022 IEEE 22nd International Conference on Communication Technology (ICCT)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125050913","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}
Pub Date : 2022-11-11DOI: 10.1109/ICCT56141.2022.10072432
Liancheng Zhang, Jianping Sun, Juwei Yan, Yi Guo, Lanxin Cheng, Wenwen Du
To ensure the security of neighbor discovery messages and processes, IPv6 subnets are increasingly deploying secure neighbor discovery (SEND) mechanisms. Although the cryptographically generated address (CGA) mechanism is the operating basis of the SEND mechanism, there is currently no technology or method for CGA configuration detection. To this end, the difficult problems lacking of CGA configuration detection method (such as the constraints caused by built-in neighbor discovery mechanism, identification of different SEND transition scenes, IPv6 address transformation) are analyzed through the in-depth analysis of the SEND mechanism and the CGA mechanism. Moreover, a CGA configuration detection method of IPv6 nodes by combining active probing and passive sniffing (CCD6-APPS) is proposed. Based on active probing and passive sniffing of active IPv6 nodes in the target IPv6 subnet, the proposed CCD6-APPS method can learn the SEND implementation methods and CGA configuration parameters of IPv6 nodes, and finally detect the coverage of SEND nodes in the target IPv6 subnet. By setting up a typical IPv6 neighbor discovery experimental environment and conducting targeted tests, the experimental results prove the effectiveness of the SSD6-APPS method, and the additional impact on the target IPv6 subnet is very small.
{"title":"CGA Configuration Detection Method of IPv6 Nodes by Combining Active Probing with Passive Sniffing","authors":"Liancheng Zhang, Jianping Sun, Juwei Yan, Yi Guo, Lanxin Cheng, Wenwen Du","doi":"10.1109/ICCT56141.2022.10072432","DOIUrl":"https://doi.org/10.1109/ICCT56141.2022.10072432","url":null,"abstract":"To ensure the security of neighbor discovery messages and processes, IPv6 subnets are increasingly deploying secure neighbor discovery (SEND) mechanisms. Although the cryptographically generated address (CGA) mechanism is the operating basis of the SEND mechanism, there is currently no technology or method for CGA configuration detection. To this end, the difficult problems lacking of CGA configuration detection method (such as the constraints caused by built-in neighbor discovery mechanism, identification of different SEND transition scenes, IPv6 address transformation) are analyzed through the in-depth analysis of the SEND mechanism and the CGA mechanism. Moreover, a CGA configuration detection method of IPv6 nodes by combining active probing and passive sniffing (CCD6-APPS) is proposed. Based on active probing and passive sniffing of active IPv6 nodes in the target IPv6 subnet, the proposed CCD6-APPS method can learn the SEND implementation methods and CGA configuration parameters of IPv6 nodes, and finally detect the coverage of SEND nodes in the target IPv6 subnet. By setting up a typical IPv6 neighbor discovery experimental environment and conducting targeted tests, the experimental results prove the effectiveness of the SSD6-APPS method, and the additional impact on the target IPv6 subnet is very small.","PeriodicalId":294057,"journal":{"name":"2022 IEEE 22nd International Conference on Communication Technology (ICCT)","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127116060","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}
Pub Date : 2022-11-11DOI: 10.1109/ICCT56141.2022.10073207
Zijian Zhang, Dongdong Wang, Lizhe Liu, Bin Wang, Chenhua Sun
In this paper, a frequency offset independent timing synchronization method is proposed to solve the large frequency offset problem for the 5G integrated low-earth-orbits (LEO) satellite communication (SatCom) system. Firstly, a frequency offset independent timing metric is designed. Without changing the frame structure of NR and based on the conjugate symmetry of the primary synchronization signal (PSS) time-domain sequence, the received PSS sequence times its time-inverse sequence to construct a product sequence, each element of which has the same phase. And the phase can be canceled by the absolute value operation. Secondly, a delay-superposition method is used to improve the performance of the designed timing metric. The detection threshold can be improved further by accumulating the correlation peak value of each PSS in the SSB burst, and the number of superpositions can be selected flexibly to adapt the link-budget of the LEO SatCom system. The simulation results show that the proposed method maintains a high detection probability with increase of the frequency offset. Compared with the M-part PSS cross-correlation algorithm, the proposed method can improve 49% detection probability at −6dB when the frequency offset is as large as 600kHz.
{"title":"A Frequency Offset Independent Timing Synchronization Method for 5G Integrated LEO Satellite Communication System","authors":"Zijian Zhang, Dongdong Wang, Lizhe Liu, Bin Wang, Chenhua Sun","doi":"10.1109/ICCT56141.2022.10073207","DOIUrl":"https://doi.org/10.1109/ICCT56141.2022.10073207","url":null,"abstract":"In this paper, a frequency offset independent timing synchronization method is proposed to solve the large frequency offset problem for the 5G integrated low-earth-orbits (LEO) satellite communication (SatCom) system. Firstly, a frequency offset independent timing metric is designed. Without changing the frame structure of NR and based on the conjugate symmetry of the primary synchronization signal (PSS) time-domain sequence, the received PSS sequence times its time-inverse sequence to construct a product sequence, each element of which has the same phase. And the phase can be canceled by the absolute value operation. Secondly, a delay-superposition method is used to improve the performance of the designed timing metric. The detection threshold can be improved further by accumulating the correlation peak value of each PSS in the SSB burst, and the number of superpositions can be selected flexibly to adapt the link-budget of the LEO SatCom system. The simulation results show that the proposed method maintains a high detection probability with increase of the frequency offset. Compared with the M-part PSS cross-correlation algorithm, the proposed method can improve 49% detection probability at −6dB when the frequency offset is as large as 600kHz.","PeriodicalId":294057,"journal":{"name":"2022 IEEE 22nd International Conference on Communication Technology (ICCT)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127424407","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}
Pub Date : 2022-11-11DOI: 10.1109/ICCT56141.2022.10072825
Liwei Yang, Boyu Jia, Fang Wang, J. Kang
Resource management is the key to improving the performance of visible optical communication (VLC)/WiFi heterogeneous networks. An improved dynamic proportional fairness algorithm is proposed to enhance the fairness of the system. Each round of scheduling compensates for user latency characteristics and jointly allocates resources. Simulation results show that the algorithm enhances fairness and throughput, with broader applications in heterogeneous networks.
{"title":"Dynamic Resource Allocation Algorithm under Visible Light Communication and WiFi Heterogeneous Network","authors":"Liwei Yang, Boyu Jia, Fang Wang, J. Kang","doi":"10.1109/ICCT56141.2022.10072825","DOIUrl":"https://doi.org/10.1109/ICCT56141.2022.10072825","url":null,"abstract":"Resource management is the key to improving the performance of visible optical communication (VLC)/WiFi heterogeneous networks. An improved dynamic proportional fairness algorithm is proposed to enhance the fairness of the system. Each round of scheduling compensates for user latency characteristics and jointly allocates resources. Simulation results show that the algorithm enhances fairness and throughput, with broader applications in heterogeneous networks.","PeriodicalId":294057,"journal":{"name":"2022 IEEE 22nd International Conference on Communication Technology (ICCT)","volume":"09 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127477350","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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