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2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring)最新文献

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Impact of IQI on Sum Rate of mmWave Massive MU-MIMO Systems with Hybrid Beamforming IQI对混合波束形成毫米波海量MU-MIMO系统和速率的影响
2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring) Pub Date : 2019-04-01 DOI: 10.1109/VTCSpring.2019.8746427
N. Zhang, Huarui Yin, Weidong Wang
{"title":"Impact of IQI on Sum Rate of mmWave Massive MU-MIMO Systems with Hybrid Beamforming","authors":"N. Zhang, Huarui Yin, Weidong Wang","doi":"10.1109/VTCSpring.2019.8746427","DOIUrl":"https://doi.org/10.1109/VTCSpring.2019.8746427","url":null,"abstract":"In this paper, we consider a single-cell hybrid millimeter wave (mmWave) massive multi-user multipleinput multiple-output (MU-MIMO) system with in- phase and quadrature-phase imbalance (IQI) at the radio frequency chains. We investigate the impact of IQI on the achievable sum rate of the system. Results show that IQI limits the sum rate to a finite ceiling as the number of antennas at the base station or transmit power goes to infinity, and its impact on performance of the hybrid beamforming system is more obvious than that of the fully digital beamforming system. With the finite resolution phase shifters, the impact of the finite resolution is less severe than that of IQI. Moreover, the sum rate decreases with the number of users in a small value region, and the impact of IQI decreases as well.","PeriodicalId":134773,"journal":{"name":"2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125460155","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}
引用次数: 0
Fast Resource Allocation for Downlink NOMA Based on Revenue and Chordal Graphs 基于收益图和弦线图的下行NOMA快速资源分配
2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring) Pub Date : 2019-04-01 DOI: 10.1109/VTCSpring.2019.8746347
Yu-Wen Huang, Shao-Ming Teng, Jung-Chun Kao, Yi-Chia Lo
{"title":"Fast Resource Allocation for Downlink NOMA Based on Revenue and Chordal Graphs","authors":"Yu-Wen Huang, Shao-Ming Teng, Jung-Chun Kao, Yi-Chia Lo","doi":"10.1109/VTCSpring.2019.8746347","DOIUrl":"https://doi.org/10.1109/VTCSpring.2019.8746347","url":null,"abstract":"Non-orthogonal multiple access (NOMA) is a promising technology for future mobile networks due to superior spectrum efficiency. In this paper, we model the interaction between the base station and multiple users as a Stackelberg game and devise a fast resource allocation method consisting of resource block allocation and power allocation. The objective is to serve as many users as possible at rates beyond their requirements, while seeking to enhance total revenue. We derive a closed-form formula for optimal power allocation. Besides, we convert the resource block allocation problem into the problem of finding a maximum weight independent set for a chordal graph, which only takes linear time. Simulation results show that the fast method we propose outperforms existing algorithms in total throughput and the number of users whose rate demands are attained.","PeriodicalId":134773,"journal":{"name":"2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125712602","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}
引用次数: 1
Eigenvalue Based Mutual Coupling Reduction 基于特征值的互耦约简
2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring) Pub Date : 2019-04-01 DOI: 10.1109/VTCSpring.2019.8746540
S. Ghosal, A. De, A. Chakrabarty
{"title":"Eigenvalue Based Mutual Coupling Reduction","authors":"S. Ghosal, A. De, A. Chakrabarty","doi":"10.1109/VTCSpring.2019.8746540","DOIUrl":"https://doi.org/10.1109/VTCSpring.2019.8746540","url":null,"abstract":"This work introduces a novel decoupling technique which employs the theory of coupled characteristic modes for a two element microstrip array. The key idea is to optimize the shape of the decoupling structure using the eigenvalues of the coupled array which can be computed with no prior knowledge of the excitation arrangement. A template example with parasitic isolating strip has been verified with full-wave simulation. The proposed method can find future application in the multi-antenna system for any desired frequency of interest.","PeriodicalId":134773,"journal":{"name":"2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121858079","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}
引用次数: 4
Clustering Based Resource Management Scheme for Latency and Sum Rate Optimization in V2X Networks 基于集群的V2X网络时延和求和速率优化资源管理方案
2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring) Pub Date : 2019-04-01 DOI: 10.1109/VTCSpring.2019.8746297
Fakhar Abbas, Gang Liu, Z. Khan, K. Zheng, P. Fan
{"title":"Clustering Based Resource Management Scheme for Latency and Sum Rate Optimization in V2X Networks","authors":"Fakhar Abbas, Gang Liu, Z. Khan, K. Zheng, P. Fan","doi":"10.1109/VTCSpring.2019.8746297","DOIUrl":"https://doi.org/10.1109/VTCSpring.2019.8746297","url":null,"abstract":"In this paper, a clustering based resource management scheme for latency and sum rate optimization in V2X networks is proposed to identify distinguished demands for different kinds of vehicular links, namely cellular-vehicle-to-vehicle (C-V2V) links and cellular-vehicle-to-infrastructure (C-V2I) links, and to improve the performance of cellular user in terms of sum rate, latency and throughput for C-V2I links while guaranteeing reliability for every C-V2V connection. To address the fast channel changes due to high mobility, we present a clustering based resource management model to achieve band sharing and efficient power management that depends on large scale fading. Besides, we have also considered the resource management problem of cellular V2X and VANETs users to reduce data transmission impacts. Firstly, the total average sum rate of each C-V2I links is used as an optimization goal to increase the throughput and to reduce latency of the entire C-V2I link. Secondly, cluster based optimum algorithms are proposed which give the optimum resource management. Simulation results reveal that the proposed scheme outperforms the existing scheme.","PeriodicalId":134773,"journal":{"name":"2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring)","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134505108","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}
引用次数: 9
Efficient Cellular Base Stations Sleep Mode Control Using Image Matching 基于图像匹配的高效蜂窝基站睡眠模式控制
2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring) Pub Date : 2019-04-01 DOI: 10.1109/VTCSpring.2019.8746343
Sepehr Ashtari, F. Tofigh, M. Abolhasan, J. Lipman, Wei Ni
{"title":"Efficient Cellular Base Stations Sleep Mode Control Using Image Matching","authors":"Sepehr Ashtari, F. Tofigh, M. Abolhasan, J. Lipman, Wei Ni","doi":"10.1109/VTCSpring.2019.8746343","DOIUrl":"https://doi.org/10.1109/VTCSpring.2019.8746343","url":null,"abstract":"Green cellular network helps to decrease environmental pollution. In contrast, massive connectivity and demand for higher data rate promise the presence of new generation of cellular system (5G) and small cell networks. Hence, expectation on increasing the number of base stations (BSs), which leads to increase in energy usage. One way to improve energy consumption is by shutting down the redundant BSs while sustaining the Quality-of-Service (QoS) for each user. In this paper, we propose a dynamic structural algorithm based on transportation problem, to switch on/off the BSs in cellular networks without compromising its coverage, and maintain the networks load by neighboring cells. We use weighted graphs to translate our problem as a transportation problem and then use linear programming to solve it. The cost of transport, turning a BS into sleep mode, is illustrated as a function of energy usage,coverage area and load on the BSs. Running the propose method consecutively provides the maximum number of BSs whom are at sleep mode. The methodology explained in this paper reduces energy consumption to almost 40%, whereas maintaining all the existing loads in the network.","PeriodicalId":134773,"journal":{"name":"2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130912945","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}
引用次数: 2
Performance Enhancement of OAM-MIMO Using Successive Interference Cancellation 利用逐次干扰抵消提高OAM-MIMO性能
2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring) Pub Date : 2019-04-01 DOI: 10.1109/VTCSpring.2019.8746501
Shuhei Saito, Hirofumi Suganuma, K. Ogawa, F. Maehara
{"title":"Performance Enhancement of OAM-MIMO Using Successive Interference Cancellation","authors":"Shuhei Saito, Hirofumi Suganuma, K. Ogawa, F. Maehara","doi":"10.1109/VTCSpring.2019.8746501","DOIUrl":"https://doi.org/10.1109/VTCSpring.2019.8746501","url":null,"abstract":"This paper proposes a method that employs successive interference cancellation (SIC) to further enhance the capacity of uniform circular array (UCA)-based orbital angular momentum (OAM)- MIMO systems. The central feature of the proposed approach is to exploit the additional space diversity benefit in the remaining streams by means of SIC owing to the large difference in the received power among different UCAs in each OAM mode. Therefore, it is expected that the proposed method can further stabilize the performance of UCA-based OAM-MIMO along with the communication distance. Our numerical results show that the proposed method outperforms the traditional method without SIC in terms of the system capacity owing to the large received power difference among different UCAs.","PeriodicalId":134773,"journal":{"name":"2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133688195","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}
引用次数: 6
Internal Crosstalk Calibration for a Fully-Switched MIMO Channel Sounder 全开关MIMO通道测深仪的内部串扰校准
2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring) Pub Date : 2019-04-01 DOI: 10.1109/VTCSpring.2019.8746697
Eun Ae Lee, Junseok Kim, Hyuk-Je Kim, Youngjun Chong, Joon Ho Cho
{"title":"Internal Crosstalk Calibration for a Fully-Switched MIMO Channel Sounder","authors":"Eun Ae Lee, Junseok Kim, Hyuk-Je Kim, Youngjun Chong, Joon Ho Cho","doi":"10.1109/VTCSpring.2019.8746697","DOIUrl":"https://doi.org/10.1109/VTCSpring.2019.8746697","url":null,"abstract":"In this paper, the problem of calibrating a fully switched MIMO channel sounder is considered that has internal crosstalk. A system model is proposed that takes into account the effect of the internal crosstalk in the transmitter and receiver response matrices. Then, a least-square system identification problem is formulated that utilizes to a set of back-to-back measurement data to find the estimates of the response matrices. It is shown that the solution can be found by making rank one approximations in the frequency domain. In addition, a channel estimation method for calibrating field measurement data is proposed by using the identified response matrices of the sounder. Experimental and simulation results show that the proposed approach outperforms the conventional approach that ignores the crosstalk.","PeriodicalId":134773,"journal":{"name":"2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128871499","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}
引用次数: 0
Full-Duplex UAV Relay Positioning for Vehicular Communications with Underlay V2V Links 基于底层V2V链路的车载通信全双工无人机中继定位
2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring) Pub Date : 2019-04-01 DOI: 10.1109/VTCSpring.2019.8746630
Pouya Pourbaba, K. B. S. Manosha, Samad Ali, Nandana Rajatheva
{"title":"Full-Duplex UAV Relay Positioning for Vehicular Communications with Underlay V2V Links","authors":"Pouya Pourbaba, K. B. S. Manosha, Samad Ali, Nandana Rajatheva","doi":"10.1109/VTCSpring.2019.8746630","DOIUrl":"https://doi.org/10.1109/VTCSpring.2019.8746630","url":null,"abstract":"The unmanned aerial vehicles (UAVs) can be deployed as aerial base stations or wireless relays to increase the capacity of wireless networks. In this paper, the positioning of a full-duplex (FD) UAV as a relay to provide coverage for an FD vehicular network is investigated. In particular, given a configuration of predefined locations for the UAV, and the position of the vehicular users on the ground, a novel algorithm is proposed to find the position for the UAV to satisfy the quality of service (QoS) requirements of the vehicles in the network. The positioning problem is formulated as an l_0 minimization which is non- combinatorial, NP-hard, and finding a globally optimal solution for this problem has exponential complexity. Hence, we have approximated the nonconvex problem using l_1 norm and proposed a suboptimal algorithm to solve it. Simulation results show that by using the proposed approach the number of times that UAV can satisfy the SINR constraints increases by approximately 10% compared to a baseline scenario in which the UAV has a fixed location.","PeriodicalId":134773,"journal":{"name":"2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127895775","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}
引用次数: 17
Performance Analysis and Optimization for the LDPC-Coded Multi-Carrier LDS System ldpc编码多载波LDS系统的性能分析与优化
2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring) Pub Date : 2019-04-01 DOI: 10.1109/VTCSpring.2019.8746490
Hano Wang, Kexin Xiao, Bin Xia, Jinglun Wang
{"title":"Performance Analysis and Optimization for the LDPC-Coded Multi-Carrier LDS System","authors":"Hano Wang, Kexin Xiao, Bin Xia, Jinglun Wang","doi":"10.1109/VTCSpring.2019.8746490","DOIUrl":"https://doi.org/10.1109/VTCSpring.2019.8746490","url":null,"abstract":"With the common property of the sparse structure, multi-carrier low density signature (MC-LDS) and low density parity-check (LDPC) codes can be combined into a joint sparse factor graph (JSFG) while the joint detection and decoding (JDD) algorithm could bring significant gains in terms of the bit error rate (BER). In this paper, considering the coupling character of the soft information interaction in the elaborate JSFG, we carve the distribution of the merged decoding soft information from both sides and theoretically analyze the error performance of the uplink LDPC-coded MC-LDS system. Correspondingly, not only the average BER but also the practical decoding threshold could be effectively derived for any given number of iterations. Furthermore, based on the theoretical analysis, we optimize the degree distribution of the JSFG by leveraging the differential evolution method. Finally, simulation results show that the practical threshold of the JDD receiver with the optimized code approaches the signal to noise ratio of the theoretical capacity.","PeriodicalId":134773,"journal":{"name":"2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115402109","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}
引用次数: 2
Resource Allocation Strategy Based on RF Energy Harvesting in Heterogeneous Networks 异构网络中基于射频能量收集的资源分配策略
2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring) Pub Date : 2019-04-01 DOI: 10.1109/VTCSpring.2019.8746408
Jincheng Gao, Yisheng Zhao, Mengjia Chen, Zhonghui Chen
{"title":"Resource Allocation Strategy Based on RF Energy Harvesting in Heterogeneous Networks","authors":"Jincheng Gao, Yisheng Zhao, Mengjia Chen, Zhonghui Chen","doi":"10.1109/VTCSpring.2019.8746408","DOIUrl":"https://doi.org/10.1109/VTCSpring.2019.8746408","url":null,"abstract":"Aiming at excessive users existing in a pico base station (PBS) of heterogeneous networks, the resource allocation problem of maximizing the total uplink throughput is investigated in this paper. By deploying a relay node with energy harvesting, some users of the PBS are transferred to the adjacent idle PBS. The resource allocation problem is formulated as an optimization problem. The objective is to maximize the total uplink throughput of users in the PBS under the constraints of the user's minimum data rate, the energy consumption, and transmission power of the relay node. The optimal solution is obtained by using the augmented Lagrange multiplier method. Simulation results show that the proposed method has higher throughput compared with the conventional method (i.e., some PBS users are transferred to the macro base station). Moreover, compared with the equal power method, the proposed method has an increase in terms of throughput to a certain degree.","PeriodicalId":134773,"journal":{"name":"2019 IEEE 89th Vehicular Technology Conference (VTC2019-Spring)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115712291","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}
引用次数: 1
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