Pub Date : 2018-08-01DOI: 10.1109/ICCCHINA.2018.8641253
Xuanfan Shen, Yong Liao, X. Dai, Daotong Li, Kai Liu
An extended Kalman filter and Rauch-Tung-Striebel Smoother (EKF-RTSS) based on Basis Expansion Model (BEM) is proposed in this paper to cope with the challenges of doubly-selective and non-stationary channel in high-speed environments. For doubly-selective channel, the BEM is adopted to reduce the estimation complexity. For non-stationary channel, a channel estimation based on EKF which is able to jointly estimate the time-varying time correlation coefficients and channel impulse response (CIR) is proposed. For further improving the channel estimation accuracy, a ‘filtering and smoothing’ channel estimator structure is designed by introducing the RTSS into channel estimation and interpolation. Simulation results illustrate that the proposed BEM-based EKF-RTSS method show better estimation accuracy, robustness and bit error rate (BER) performance than the traditional methods in high-speed scenarios.
{"title":"BEM-based EKF-RTSS Channel Estimation for Non-stationary Doubly-selective Channel","authors":"Xuanfan Shen, Yong Liao, X. Dai, Daotong Li, Kai Liu","doi":"10.1109/ICCCHINA.2018.8641253","DOIUrl":"https://doi.org/10.1109/ICCCHINA.2018.8641253","url":null,"abstract":"An extended Kalman filter and Rauch-Tung-Striebel Smoother (EKF-RTSS) based on Basis Expansion Model (BEM) is proposed in this paper to cope with the challenges of doubly-selective and non-stationary channel in high-speed environments. For doubly-selective channel, the BEM is adopted to reduce the estimation complexity. For non-stationary channel, a channel estimation based on EKF which is able to jointly estimate the time-varying time correlation coefficients and channel impulse response (CIR) is proposed. For further improving the channel estimation accuracy, a ‘filtering and smoothing’ channel estimator structure is designed by introducing the RTSS into channel estimation and interpolation. Simulation results illustrate that the proposed BEM-based EKF-RTSS method show better estimation accuracy, robustness and bit error rate (BER) performance than the traditional methods in high-speed scenarios.","PeriodicalId":170216,"journal":{"name":"2018 IEEE/CIC International Conference on Communications in China (ICCC)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126290713","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 : 2018-08-01DOI: 10.1109/ICCCHINA.2018.8641126
Xu Bao, Winfred Adjardjah, Andrews A. Okine, Wence Zhang, Nan Bao
Visible light communication (VLC) is becoming a potential complementary method to its radio frequency (RF) counterpart. A tier-two VLC-RF system offers the solution to the future communications system that puts together VLC to support big data rate, enormous bandwidth and RF to support dependable mobile connectivity. In order to improve the performance of such a heterogeneous system, vertical handover (VHO) is critical. In this article, we present a VHO scheme based on Markov decision process (MDP) that maximizes the quality of experience (QoE) of a user equipment (UE). When UE makes a handover between VLC and the RF network, the influence on the UE’s QoE may be positive or negative. The handover decision is made in order to enhance the benefit on QoE and reduce the cost of handover of the user. From the simulation results, our proposed VHO method attains a higher QoE and has the least handover delay cost when compared with benchmark schemes.
{"title":"Vertical Handover Scheme for Enhancing the QoE in VLC Heterogeneous Networks","authors":"Xu Bao, Winfred Adjardjah, Andrews A. Okine, Wence Zhang, Nan Bao","doi":"10.1109/ICCCHINA.2018.8641126","DOIUrl":"https://doi.org/10.1109/ICCCHINA.2018.8641126","url":null,"abstract":"Visible light communication (VLC) is becoming a potential complementary method to its radio frequency (RF) counterpart. A tier-two VLC-RF system offers the solution to the future communications system that puts together VLC to support big data rate, enormous bandwidth and RF to support dependable mobile connectivity. In order to improve the performance of such a heterogeneous system, vertical handover (VHO) is critical. In this article, we present a VHO scheme based on Markov decision process (MDP) that maximizes the quality of experience (QoE) of a user equipment (UE). When UE makes a handover between VLC and the RF network, the influence on the UE’s QoE may be positive or negative. The handover decision is made in order to enhance the benefit on QoE and reduce the cost of handover of the user. From the simulation results, our proposed VHO method attains a higher QoE and has the least handover delay cost when compared with benchmark schemes.","PeriodicalId":170216,"journal":{"name":"2018 IEEE/CIC International Conference on Communications in China (ICCC)","volume":"176 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115919609","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 : 2018-08-01DOI: 10.1109/ICCCHINA.2018.8641188
Jianfei Tong, Yang Lu, Donglei Zhang, Gaofeng Cui, Weidong Wang
This paper considers a Multi-User Multiple Input Multiple Output (MU-MIMO) communication scenario, which is based on high altitude platforms (HAPs) equipped with a large scale antenna array. Traditional digital beamformers require plenty of RF chains so that large power consumption is inevitable. Moreover, sophisticated amplitude-phase design of digital beamforming in baseband will lead to high computational complexity. Therefore, we propose a max-min analog beamforming algorithm named as Epigraph-Relax-Bisection-Decomposition (ERBD) for HAP-based MU-MIMO communication systems, which achieves less power consumption compared to digital ones. The scheme uses a semi-definite relaxation (SDR) approach to approximate the quadratically constraint quadratic programming (QCQP) beamforming problem. Simulation results show that the proposed ERBD algorithm outperforms the traditional analog beamforming algorithms. ERBD is suitable for power consumption limited HAP-based communication systems.
{"title":"Max-min Analog Beamforming for High Altitude Platforms Communication Systems","authors":"Jianfei Tong, Yang Lu, Donglei Zhang, Gaofeng Cui, Weidong Wang","doi":"10.1109/ICCCHINA.2018.8641188","DOIUrl":"https://doi.org/10.1109/ICCCHINA.2018.8641188","url":null,"abstract":"This paper considers a Multi-User Multiple Input Multiple Output (MU-MIMO) communication scenario, which is based on high altitude platforms (HAPs) equipped with a large scale antenna array. Traditional digital beamformers require plenty of RF chains so that large power consumption is inevitable. Moreover, sophisticated amplitude-phase design of digital beamforming in baseband will lead to high computational complexity. Therefore, we propose a max-min analog beamforming algorithm named as Epigraph-Relax-Bisection-Decomposition (ERBD) for HAP-based MU-MIMO communication systems, which achieves less power consumption compared to digital ones. The scheme uses a semi-definite relaxation (SDR) approach to approximate the quadratically constraint quadratic programming (QCQP) beamforming problem. Simulation results show that the proposed ERBD algorithm outperforms the traditional analog beamforming algorithms. ERBD is suitable for power consumption limited HAP-based communication systems.","PeriodicalId":170216,"journal":{"name":"2018 IEEE/CIC International Conference on Communications in China (ICCC)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131339797","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 : 2018-08-01DOI: 10.1109/ICCCHINA.2018.8641147
Ting Liu, Luyao Ni, Shi Jin, X. You
This paper proposes a novel angular domain peak-to-average power ratio (PAPR) reduction technique in massive multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. Constant envelope (CE) precoding, OFDM modulation, and PAPR reduction are jointly implemented by solving a optimization problems in multi-beam (i.e., angle division multiple access, ADMA) systems. The proposed simplified iterative discrete estimation (SIDE) precoding scheme exploits the characteristics of massive MIMO-OFDM-ADMA system model and efficiently decrease PAPR effect with relatively lower computation complexity. Numerical results demonstrate that the proposed solution can achieve nearly optimal PAPR reduction performance, and scarcely any symbol error ratio (SER) performance loss.
{"title":"Angular Domain PAPR Reduction for Massive Multi-user MIMO-OFDM Downlink","authors":"Ting Liu, Luyao Ni, Shi Jin, X. You","doi":"10.1109/ICCCHINA.2018.8641147","DOIUrl":"https://doi.org/10.1109/ICCCHINA.2018.8641147","url":null,"abstract":"This paper proposes a novel angular domain peak-to-average power ratio (PAPR) reduction technique in massive multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. Constant envelope (CE) precoding, OFDM modulation, and PAPR reduction are jointly implemented by solving a optimization problems in multi-beam (i.e., angle division multiple access, ADMA) systems. The proposed simplified iterative discrete estimation (SIDE) precoding scheme exploits the characteristics of massive MIMO-OFDM-ADMA system model and efficiently decrease PAPR effect with relatively lower computation complexity. Numerical results demonstrate that the proposed solution can achieve nearly optimal PAPR reduction performance, and scarcely any symbol error ratio (SER) performance loss.","PeriodicalId":170216,"journal":{"name":"2018 IEEE/CIC International Conference on Communications in China (ICCC)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131373041","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 : 2018-08-01DOI: 10.1109/ICCCHINA.2018.8641125
Zhi Xu, Zhi Zhang, Yue Gui
The business process is a series of activities that carried out by different assignees to achieve a specific goal. Recommender systems has been used to assist business managers to make decisions on choosing the proper assignee to handle current task. Nevertheless, the problem of presenting the recommendations of business process has not been studied. We designed a novel transition flow diagram to present the details of business process, and based on which, we proposed a predictive analytics system, OperationFlow, to present and explain recommendations of assignees. We demonstrate the usefulness and effectiveness of OperationFlow through a series case studies with system managers in an enterprise context.
{"title":"OperationFlow: Visual Analytics for Business Process Sequence Recommendation","authors":"Zhi Xu, Zhi Zhang, Yue Gui","doi":"10.1109/ICCCHINA.2018.8641125","DOIUrl":"https://doi.org/10.1109/ICCCHINA.2018.8641125","url":null,"abstract":"The business process is a series of activities that carried out by different assignees to achieve a specific goal. Recommender systems has been used to assist business managers to make decisions on choosing the proper assignee to handle current task. Nevertheless, the problem of presenting the recommendations of business process has not been studied. We designed a novel transition flow diagram to present the details of business process, and based on which, we proposed a predictive analytics system, OperationFlow, to present and explain recommendations of assignees. We demonstrate the usefulness and effectiveness of OperationFlow through a series case studies with system managers in an enterprise context.","PeriodicalId":170216,"journal":{"name":"2018 IEEE/CIC International Conference on Communications in China (ICCC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132350840","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 : 2018-08-01DOI: 10.1109/ICCCHINA.2018.8641141
Haifeng Tan, Jianhua Zhang
As one of the most promising techniques for the 5th Generation (5G) mobile communication systems, Three dimensional (3D) Multiple Input and Multiple Output (MIMO) has the potential of improving spectrum efficiency, but it needs further research. For 3D channel model, the elevation angle should be accurately included. Conventionally 3D channel is modeled with an assumption that the mean elevation angle of multipath is coincided with the line of sight (LOS) direction. To investigate its authenticity, we conduct extensive 3D multiple antenna field channel measurements with 100 MHz bandwidth in a typical urban microcell (UMi) scenario. The elevation angles of each multipath is extracted from the measurement data and its statistical propagation characteristics are analyzed. It is found that for LOS case, this assumption holds. However, for none line of sight (NLOS) case, there exists an elevation angle difference between the mean and the line directly connecting transmitting and receiving antenna, which is defined as elevation angle offset. The performance of the 3D channel model with the elevation angle offset is validated in terms of channel capacity comparing to the 3D channel model without angle offset. Results show that the 3D channel model with angle offset fits the real measured data better.
作为第5代(5G)移动通信系统中最有前途的技术之一，三维多输入多输出(Three dimensional Multiple Input and Multiple Output, MIMO)技术具有提高频谱效率的潜力，但需要进一步研究。对于三维通道模型，需要精确地包含俯仰角。传统的三维通道建模假设多路径平均仰角与视线方向一致。为了研究其真实性，我们在典型的城市微蜂窝(UMi)场景中以100 MHz带宽进行了广泛的3D多天线场信道测量。从测量数据中提取各多径仰角，分析其统计传播特性。研究发现，对于LOS情况，这一假设成立。而在无瞄准线情况下，均值与收发天线直连线之间存在一个仰角差，定义为仰角偏移。对比无角度偏移的三维通道模型，验证了有仰角偏移的三维通道模型在通道容量方面的性能。结果表明，考虑角度偏移的三维通道模型能较好地拟合实际测量数据。
{"title":"Performance Analysis of Three Dimensional Fading Channel Model with Angle Offset","authors":"Haifeng Tan, Jianhua Zhang","doi":"10.1109/ICCCHINA.2018.8641141","DOIUrl":"https://doi.org/10.1109/ICCCHINA.2018.8641141","url":null,"abstract":"As one of the most promising techniques for the 5th Generation (5G) mobile communication systems, Three dimensional (3D) Multiple Input and Multiple Output (MIMO) has the potential of improving spectrum efficiency, but it needs further research. For 3D channel model, the elevation angle should be accurately included. Conventionally 3D channel is modeled with an assumption that the mean elevation angle of multipath is coincided with the line of sight (LOS) direction. To investigate its authenticity, we conduct extensive 3D multiple antenna field channel measurements with 100 MHz bandwidth in a typical urban microcell (UMi) scenario. The elevation angles of each multipath is extracted from the measurement data and its statistical propagation characteristics are analyzed. It is found that for LOS case, this assumption holds. However, for none line of sight (NLOS) case, there exists an elevation angle difference between the mean and the line directly connecting transmitting and receiving antenna, which is defined as elevation angle offset. The performance of the 3D channel model with the elevation angle offset is validated in terms of channel capacity comparing to the 3D channel model without angle offset. Results show that the 3D channel model with angle offset fits the real measured data better.","PeriodicalId":170216,"journal":{"name":"2018 IEEE/CIC International Conference on Communications in China (ICCC)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133962806","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 : 2018-08-01DOI: 10.1109/ICCCHINA.2018.8641086
Zhanji Wu, Xuanbo Shao
A novel spreading non-orthogonal multiple access (NOMA) scheme is proposed for the future 5G communication system, which is called maximum Welch-bound spreading multiple access (MWSMA). In the transmitter, each user’s modulated symbols are spread by a complex-valued short spreading sequence and then sent simultaneously on the same frequency spectrum. We design spreading sequences via maximum-Welch-bound-equality (MWBE) to minimize the maximum cross-correlation amplitude. Theoretical analysis on cross-correlation and average mutual information (AMI) proves that the proposed MWSMA scheme is much superior to the current orthogonal frequency division multiple access (OFDMA) and two key NOMA schemes, multi-user shared access (MUSA) and sparse code multiple access (SCMA), especially for high spectral efficiency (SE). Simulation results also verify that MWSMA can achieve significant 0.8dB, 0.8dB and 3.9dB signal-to-noise-ratio (SNR) gain at target block error rate (BLER) 10−1 as compared with MUSA, SCMA and OFDMA, respectively.
{"title":"A Novel Non-Orthogonal Multiple Access Based On Maximum Welch Bound Equality","authors":"Zhanji Wu, Xuanbo Shao","doi":"10.1109/ICCCHINA.2018.8641086","DOIUrl":"https://doi.org/10.1109/ICCCHINA.2018.8641086","url":null,"abstract":"A novel spreading non-orthogonal multiple access (NOMA) scheme is proposed for the future 5G communication system, which is called maximum Welch-bound spreading multiple access (MWSMA). In the transmitter, each user’s modulated symbols are spread by a complex-valued short spreading sequence and then sent simultaneously on the same frequency spectrum. We design spreading sequences via maximum-Welch-bound-equality (MWBE) to minimize the maximum cross-correlation amplitude. Theoretical analysis on cross-correlation and average mutual information (AMI) proves that the proposed MWSMA scheme is much superior to the current orthogonal frequency division multiple access (OFDMA) and two key NOMA schemes, multi-user shared access (MUSA) and sparse code multiple access (SCMA), especially for high spectral efficiency (SE). Simulation results also verify that MWSMA can achieve significant 0.8dB, 0.8dB and 3.9dB signal-to-noise-ratio (SNR) gain at target block error rate (BLER) 10−1 as compared with MUSA, SCMA and OFDMA, respectively.","PeriodicalId":170216,"journal":{"name":"2018 IEEE/CIC International Conference on Communications in China (ICCC)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131593206","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 : 2018-08-01DOI: 10.1109/ICCCHINA.2018.8641247
Yanting Zhang, Shuaiyu Jin, Yuanyuan Qiao, Kewu Sun, Hao Zhang, Jie Yang
The rapid urbanization in recent years booms our daily life. However, great challenges still exist when it comes to resource allocation and urban planning. While there are lots of works on sensing urban spatial hotspots and exploring their properties, little attention has been given to users’ interactions with them from an inter-connected way. Users’ visits on places always reveal the places’ ability of grouping people together. We call it users and places are inter-connected. Benefiting from the development of information technology, we have observed a dramatic increase of the mobile big data. How to convert the data into actionable insights are some of the biggest impediments to unlock its value. Fully mining the mobile big dataset collected from one northern city in China, we first present a density-based method to recognize hotspots in a city, which are usually significant places with specific functions. Then a user-location inter-connected network is constructed based on the detected spatial hotspots. Different properties are shown in different places. Our analysis sheds light on the relationship between the prosperity of people and places, distinguishing various urban functions. Besides, it will benefit the next generation of location-based services and applications.
{"title":"Exploring Urban Spatial Hotspots’ Properties Using Inter-Connected User-Location Networks","authors":"Yanting Zhang, Shuaiyu Jin, Yuanyuan Qiao, Kewu Sun, Hao Zhang, Jie Yang","doi":"10.1109/ICCCHINA.2018.8641247","DOIUrl":"https://doi.org/10.1109/ICCCHINA.2018.8641247","url":null,"abstract":"The rapid urbanization in recent years booms our daily life. However, great challenges still exist when it comes to resource allocation and urban planning. While there are lots of works on sensing urban spatial hotspots and exploring their properties, little attention has been given to users’ interactions with them from an inter-connected way. Users’ visits on places always reveal the places’ ability of grouping people together. We call it users and places are inter-connected. Benefiting from the development of information technology, we have observed a dramatic increase of the mobile big data. How to convert the data into actionable insights are some of the biggest impediments to unlock its value. Fully mining the mobile big dataset collected from one northern city in China, we first present a density-based method to recognize hotspots in a city, which are usually significant places with specific functions. Then a user-location inter-connected network is constructed based on the detected spatial hotspots. Different properties are shown in different places. Our analysis sheds light on the relationship between the prosperity of people and places, distinguishing various urban functions. Besides, it will benefit the next generation of location-based services and applications.","PeriodicalId":170216,"journal":{"name":"2018 IEEE/CIC International Conference on Communications in China (ICCC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130860761","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 : 2018-08-01DOI: 10.1109/ICCCHINA.2018.8641094
Mi Yang, B. Ai, R. He, Liang Chen, Xue Li, Jianzhi Li, Qi Wang, Bei Zhang, Chen Huang
In order to model the vehicle-to-vehicle (V2V) channel, a cluster-based 3D channel model is proposed in this paper, which is based on measurements conducted at 5.9 GHz in urban and suburban scenarios. A 16-element dual-polarized cylindrical antenna array is used in the measurements. Then the Space-Alternating Generalized Expectation-maximization (SAGE) algorithm is applied to extract the multipath components (MPC) and the clustering and tracking algorithms are used to identify and track the MPC clusters. Based on the clustering results, this paper presents a cluster-based three-dimensional V2V channel model. In the model, we divide the MPC clusters into two categories: Global-Cluster and Scatterer-Cluster, in which Global-Cluster are brought by line-of-sight (LOS) propagation or ground reflection, and Scatterer-Cluster are brought by scatterers such as vehicles and buildings. The Global-Cluster is described by a series of global-cluster parameters, then several inter-cluster and intra-cluster parameters are used to describe the Scatterer-Cluster. The proposed model is useful for characterizing the three-dimensional V2V channels.
{"title":"A Cluster-Based 3D Channel Model for Vehicle-to-Vehicle Communications","authors":"Mi Yang, B. Ai, R. He, Liang Chen, Xue Li, Jianzhi Li, Qi Wang, Bei Zhang, Chen Huang","doi":"10.1109/ICCCHINA.2018.8641094","DOIUrl":"https://doi.org/10.1109/ICCCHINA.2018.8641094","url":null,"abstract":"In order to model the vehicle-to-vehicle (V2V) channel, a cluster-based 3D channel model is proposed in this paper, which is based on measurements conducted at 5.9 GHz in urban and suburban scenarios. A 16-element dual-polarized cylindrical antenna array is used in the measurements. Then the Space-Alternating Generalized Expectation-maximization (SAGE) algorithm is applied to extract the multipath components (MPC) and the clustering and tracking algorithms are used to identify and track the MPC clusters. Based on the clustering results, this paper presents a cluster-based three-dimensional V2V channel model. In the model, we divide the MPC clusters into two categories: Global-Cluster and Scatterer-Cluster, in which Global-Cluster are brought by line-of-sight (LOS) propagation or ground reflection, and Scatterer-Cluster are brought by scatterers such as vehicles and buildings. The Global-Cluster is described by a series of global-cluster parameters, then several inter-cluster and intra-cluster parameters are used to describe the Scatterer-Cluster. The proposed model is useful for characterizing the three-dimensional V2V channels.","PeriodicalId":170216,"journal":{"name":"2018 IEEE/CIC International Conference on Communications in China (ICCC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130941163","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 : 2018-08-01DOI: 10.1109/ICCCHINA.2018.8641142
Longfei Zhou, Fan Liu, Chang Tian, C. Masouros, Ang Li, Wei Jiang, Wu Luo
This paper considers the waveform design for dual-functional multi-input-multi-output (MIMO) radar-communication systems. Two optimization-based novel waveform designs are proposed. The aim of the first waveform design is to minimize the downlink multi-user interference (MUI) energy by exploiting the remaining degrees of freedom (DoFs) while always guaranteeing the radar performance to be optimal. The second waveform design is a trade-off optimization between radar and communication performances by allowing a tolerable mismatch between the designed and the desired radar beampatterns. Albeit non-convexity of both problems, efficient algorithms are devised to obtain globally optimal solutions, which can be used for simultaneous target detection and downlink communications. Numerical results show that the communication performance could be significantly improved by tolerating a slight radar performance loss and therefore a favorable balance between communication and radar performances is achievable.
{"title":"Optimal Waveform Design for Dual-functional MIMO Radar-Communication Systems","authors":"Longfei Zhou, Fan Liu, Chang Tian, C. Masouros, Ang Li, Wei Jiang, Wu Luo","doi":"10.1109/ICCCHINA.2018.8641142","DOIUrl":"https://doi.org/10.1109/ICCCHINA.2018.8641142","url":null,"abstract":"This paper considers the waveform design for dual-functional multi-input-multi-output (MIMO) radar-communication systems. Two optimization-based novel waveform designs are proposed. The aim of the first waveform design is to minimize the downlink multi-user interference (MUI) energy by exploiting the remaining degrees of freedom (DoFs) while always guaranteeing the radar performance to be optimal. The second waveform design is a trade-off optimization between radar and communication performances by allowing a tolerable mismatch between the designed and the desired radar beampatterns. Albeit non-convexity of both problems, efficient algorithms are devised to obtain globally optimal solutions, which can be used for simultaneous target detection and downlink communications. Numerical results show that the communication performance could be significantly improved by tolerating a slight radar performance loss and therefore a favorable balance between communication and radar performances is achievable.","PeriodicalId":170216,"journal":{"name":"2018 IEEE/CIC International Conference on Communications in China (ICCC)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127836295","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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