Sparse Code Multiple Access (SCMA) is expected to accommodate massive machine-type communications (mMTC) in 5G wireless networks. Since the overloading system creates enormous signaling overheads, massive connections with grant-free transmission methodology have received significant attention. In this paper, we study active user detection (AUD) and channel estimation (CE) based on compressed sensing technology in the uplink of a grant-free system. We firstly propose a pilot design scheme considering the optimization of sensing matrix, and then a dynamic sensing matrix-based Group Orthogonal Matching Pursuit (DSM-based GOMP) algorithm is proposed for block sparse channel estimation, and hence pilot overhead in the cellular network can realize self-adaptation with the number of potential users or communication channel states. In low SNR scenarios, the sensing matrix composed of Zadoff-Chu (ZC) sequence is considered. When the SNR exceeds the threshold, the sensing matrix is constructed by optimizing Gram matrix to reduce inter-cell interference. Simulation results prove that the proposed algorithm is capable of achieving multiple access with low detection error, and adjust pilot resource overhead adaptively.
{"title":"Dynamic Pilot Design and Channel Estimation Based on Structured Compressive Sensing for Uplink SCMA System","authors":"Shan Guo, Wei Wu, Xuanli Wu, Xu Chen, Tingting Zhang","doi":"10.1109/ICCChinaW.2019.8849953","DOIUrl":"https://doi.org/10.1109/ICCChinaW.2019.8849953","url":null,"abstract":"Sparse Code Multiple Access (SCMA) is expected to accommodate massive machine-type communications (mMTC) in 5G wireless networks. Since the overloading system creates enormous signaling overheads, massive connections with grant-free transmission methodology have received significant attention. In this paper, we study active user detection (AUD) and channel estimation (CE) based on compressed sensing technology in the uplink of a grant-free system. We firstly propose a pilot design scheme considering the optimization of sensing matrix, and then a dynamic sensing matrix-based Group Orthogonal Matching Pursuit (DSM-based GOMP) algorithm is proposed for block sparse channel estimation, and hence pilot overhead in the cellular network can realize self-adaptation with the number of potential users or communication channel states. In low SNR scenarios, the sensing matrix composed of Zadoff-Chu (ZC) sequence is considered. When the SNR exceeds the threshold, the sensing matrix is constructed by optimizing Gram matrix to reduce inter-cell interference. Simulation results prove that the proposed algorithm is capable of achieving multiple access with low detection error, and adjust pilot resource overhead adaptively.","PeriodicalId":252172,"journal":{"name":"2019 IEEE/CIC International Conference on Communications Workshops in China (ICCC Workshops)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130726600","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 : 2019-08-01DOI: 10.1109/ICCChinaW.2019.8849944
Guanjie Hu, Yue Zhu, Wenjing Zhao, Minzheng Jia, B. Juliyanto, Y. Y. Nazaruddin
Ambient backscatter, one type of batteryless backscatter, is a new technology that utilizes environmental wireless signals to enable battery-free devices to communicate with each other. Most existing studies on ambient backscatter are based on the assumption of a single antenna at each tag. In this paper, we investigate signal detection in ambient backscatter communication systems with multiple-antenna tags. The use of multiple antennas results in multiple channel parameters between the tag and the reader, which constitutes the main challenge for signal detection because the tag has limited power and can transmit few training symbols. We show that traditional detection algorithms can not be directly applied into these Batteryless Backscatter systems with multiple-antenna tags. New detectors are to be designed for such systems, which is a good topic for future research.
{"title":"Signal Detection for Batteryless Backscatter Systems with Multiple-Antenna Tags","authors":"Guanjie Hu, Yue Zhu, Wenjing Zhao, Minzheng Jia, B. Juliyanto, Y. Y. Nazaruddin","doi":"10.1109/ICCChinaW.2019.8849944","DOIUrl":"https://doi.org/10.1109/ICCChinaW.2019.8849944","url":null,"abstract":"Ambient backscatter, one type of batteryless backscatter, is a new technology that utilizes environmental wireless signals to enable battery-free devices to communicate with each other. Most existing studies on ambient backscatter are based on the assumption of a single antenna at each tag. In this paper, we investigate signal detection in ambient backscatter communication systems with multiple-antenna tags. The use of multiple antennas results in multiple channel parameters between the tag and the reader, which constitutes the main challenge for signal detection because the tag has limited power and can transmit few training symbols. We show that traditional detection algorithms can not be directly applied into these Batteryless Backscatter systems with multiple-antenna tags. New detectors are to be designed for such systems, which is a good topic for future research.","PeriodicalId":252172,"journal":{"name":"2019 IEEE/CIC International Conference on Communications Workshops in China (ICCC Workshops)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114173132","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 : 2019-08-01DOI: 10.1109/ICCChinaW.2019.8849942
Li-jun Peng, Guifen. Chen, Gao Ruijuan
Wireless sensor network (WSN) is a hot research field at present. As a key technology of WSN, localization algorithm plays an important role in improving node location accuracy and network efficiency. An improved Pigeon-inspired Optimization(IPIO) combined with a typical localization model is proposed to solve the problem of node localization accuracy in wireless sensor networks (WSN). First of all, a Pigeon-inspired Optimization based on pareto distance classification is proposed to optimize the fitness calculation method, and then the self-learning idea and speed formula are combined. Finally, the position correction factor is introduced into the late updating formula of pigeon group to further improve the positioning accuracy. The simulation results show that compared with the improved particle swarm optimization(PSO) and the cuckoo swarm(CS), the algorithm can effectively improve the location accuracy of nodes and reduce the cumulative error caused by successive positioning. It has a strong practicability.
{"title":"Research on wireless sensor network location based on Improve Pigeon-inspired optimization","authors":"Li-jun Peng, Guifen. Chen, Gao Ruijuan","doi":"10.1109/ICCChinaW.2019.8849942","DOIUrl":"https://doi.org/10.1109/ICCChinaW.2019.8849942","url":null,"abstract":"Wireless sensor network (WSN) is a hot research field at present. As a key technology of WSN, localization algorithm plays an important role in improving node location accuracy and network efficiency. An improved Pigeon-inspired Optimization(IPIO) combined with a typical localization model is proposed to solve the problem of node localization accuracy in wireless sensor networks (WSN). First of all, a Pigeon-inspired Optimization based on pareto distance classification is proposed to optimize the fitness calculation method, and then the self-learning idea and speed formula are combined. Finally, the position correction factor is introduced into the late updating formula of pigeon group to further improve the positioning accuracy. The simulation results show that compared with the improved particle swarm optimization(PSO) and the cuckoo swarm(CS), the algorithm can effectively improve the location accuracy of nodes and reduce the cumulative error caused by successive positioning. It has a strong practicability.","PeriodicalId":252172,"journal":{"name":"2019 IEEE/CIC International Conference on Communications Workshops in China (ICCC Workshops)","volume":"2015 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114454970","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}
Network virtualization is a significant technology for the future network development. Many research results of it have already been proposed. However, almost all of these research is based on terrestrial networks to establish a network model. These terrestrial-based research cannot adapt to the extremely limited re-sources and high dynamics of satellite networks, and obviously cannot meet the demands of satellite networks for the network virtualization services. The inter-satellite link only establishes a connection when it carries a task. This establishment of inter-satellite links consumes the energy of the satellite. To reduce energy consumption of satellite network, this paper establishes a satellite network model and proposes a virtual network embedding (SN-VNE) algorithm. By considering link establishment state in node mapping and link mapping, we moderately map virtual links to the established physical connections. Our experiments prove that SN-VNE can reduce the number of link establishments in the mapping of virtual links. This reduction can save the energy consumption of satellite networks.
{"title":"SN-VNE: A Virtual Network Embedding Algorithm for Satellite Networks","authors":"Jiang Liu, Xiaochun He, Tianjiao Chen, Xinghui Wang, Ruizhi Luo, Tao Huang","doi":"10.1109/ICCChinaW.2019.8849950","DOIUrl":"https://doi.org/10.1109/ICCChinaW.2019.8849950","url":null,"abstract":"Network virtualization is a significant technology for the future network development. Many research results of it have already been proposed. However, almost all of these research is based on terrestrial networks to establish a network model. These terrestrial-based research cannot adapt to the extremely limited re-sources and high dynamics of satellite networks, and obviously cannot meet the demands of satellite networks for the network virtualization services. The inter-satellite link only establishes a connection when it carries a task. This establishment of inter-satellite links consumes the energy of the satellite. To reduce energy consumption of satellite network, this paper establishes a satellite network model and proposes a virtual network embedding (SN-VNE) algorithm. By considering link establishment state in node mapping and link mapping, we moderately map virtual links to the established physical connections. Our experiments prove that SN-VNE can reduce the number of link establishments in the mapping of virtual links. This reduction can save the energy consumption of satellite networks.","PeriodicalId":252172,"journal":{"name":"2019 IEEE/CIC International Conference on Communications Workshops in China (ICCC Workshops)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124646556","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 : 2019-08-01DOI: 10.1109/ICCChinaW.2019.8849938
Hu Hu, Yuefeng Ji, Yubin Zhao, Jiawei Zhang, Junjian Huang
In a Magnetic Coupling Resonant Wireless Power Transfer (MCRWPT) system, adding relay coils is an effective way to increase the transmission distance which reception will enhanced differently at different placements, meanwhile, multi transmitter coils are used to improve the transmission efficiency. In this paper, we adopt a method mixed with switched rely and optional source to enhance the acceptable coverage area of the entire system, so that the receiver can effectively cover the entire space. We establish a general system model to perform mathematical analysis and simulation on the MCRWPT systems of arbitrary coils, and analyse the spatial characteristics from the frequency domain combined with the coupling coefficient. In order to better utilize the spatial characteristics of different system states, we use the feedback information of the receiver to control the relay switch and source, and compare the performance analysis of different control methods.
{"title":"Switched rely and Optional Source of Magnetic Coupling Resonant Wireless Transfer System","authors":"Hu Hu, Yuefeng Ji, Yubin Zhao, Jiawei Zhang, Junjian Huang","doi":"10.1109/ICCChinaW.2019.8849938","DOIUrl":"https://doi.org/10.1109/ICCChinaW.2019.8849938","url":null,"abstract":"In a Magnetic Coupling Resonant Wireless Power Transfer (MCRWPT) system, adding relay coils is an effective way to increase the transmission distance which reception will enhanced differently at different placements, meanwhile, multi transmitter coils are used to improve the transmission efficiency. In this paper, we adopt a method mixed with switched rely and optional source to enhance the acceptable coverage area of the entire system, so that the receiver can effectively cover the entire space. We establish a general system model to perform mathematical analysis and simulation on the MCRWPT systems of arbitrary coils, and analyse the spatial characteristics from the frequency domain combined with the coupling coefficient. In order to better utilize the spatial characteristics of different system states, we use the feedback information of the receiver to control the relay switch and source, and compare the performance analysis of different control methods.","PeriodicalId":252172,"journal":{"name":"2019 IEEE/CIC International Conference on Communications Workshops in China (ICCC Workshops)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128027737","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}
This paper investigates the performance of a two-hop amplify-and-forward (AF) relaying networks over log-normal fading channel, while considering multiple interferer signals at the relay node and the destination node. Two well-known protocols, time switching-based relaying (TSR) and power splitting-based relaying (PSR) protocols, are considered. The analytical expressions of outage probability and throughput for the proposed network are derived. Numerical results verify our theoretical analysis and show that the transmission rate has a greater impact on system performance compared to other system parameters. Compared to the time switching factor for the TSR protocol, the power splitting factor for the PSR protocol has an insensitive effect on the system throughput. Furthermore, numerical results also exhibit the effect of the transmit signal-to-noise (SNR) on the system performance both for two proposed protocols.
{"title":"Performance analysis of dual-hop AF relaying networks over log-normal fading channels with interferences","authors":"Yingting Liu, Jianmei Shen, Zhengwei Pan, Ruiyi Xiao, Hongwu Yang, Chun-man Yan","doi":"10.1109/ICCChinaW.2019.8849931","DOIUrl":"https://doi.org/10.1109/ICCChinaW.2019.8849931","url":null,"abstract":"This paper investigates the performance of a two-hop amplify-and-forward (AF) relaying networks over log-normal fading channel, while considering multiple interferer signals at the relay node and the destination node. Two well-known protocols, time switching-based relaying (TSR) and power splitting-based relaying (PSR) protocols, are considered. The analytical expressions of outage probability and throughput for the proposed network are derived. Numerical results verify our theoretical analysis and show that the transmission rate has a greater impact on system performance compared to other system parameters. Compared to the time switching factor for the TSR protocol, the power splitting factor for the PSR protocol has an insensitive effect on the system throughput. Furthermore, numerical results also exhibit the effect of the transmit signal-to-noise (SNR) on the system performance both for two proposed protocols.","PeriodicalId":252172,"journal":{"name":"2019 IEEE/CIC International Conference on Communications Workshops in China (ICCC Workshops)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130175445","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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