IEEE Transactions on Wireless Communications最新文献_第8页

Hybrid Near-Far Field Channel Estimation for Holographic MIMO Communications 全息多输入多输出通信的混合近远场信道估计

IF 8.9 1区计算机科学

IEEE Transactions on Wireless Communications Pub Date : 2024-08-01 DOI: 10.1109/TWC.2024.3433491

Shaohua Yue;Shuhao Zeng;Liang Liu;Yonina C. Eldar;Boya Di

{"title":"Hybrid Near-Far Field Channel Estimation for Holographic MIMO Communications","authors":"Shaohua Yue;Shuhao Zeng;Liang Liu;Yonina C. Eldar;Boya Di","doi":"10.1109/TWC.2024.3433491","DOIUrl":"10.1109/TWC.2024.3433491","url":null,"abstract":"Holographic MIMO communications, enabled by large-scale antenna arrays with quasi-continuous apertures, are potential technology for spectrum efficiency improvement. However, the increased antenna aperture size extends the range of the Fresnel region, leading to a hybrid near-far field communication mode. The users and scatterers randomly lie in near-field and far-field zones, and thus, conventional far-field-only and near-field-only channel estimation methods may not work. To tackle this challenge, we demonstrate the existence of the power diffusion (PD) effect, which leads to a mismatch between the hybrid-field channel and existing channel estimation methods. Specifically, in far-field and near-field transform domains, the power of one channel path may diffuse to other positions, thus generating fake paths. This renders the conventional techniques unable to detect those real paths. We propose a PD-aware orthogonal matching pursuit (PD-OMP) algorithm to eliminate the influence of the PD effect by identifying the PD range, within which the path power diffuses to other positions. PD-OMP fits a general case without prior knowledge of respective numbers of near-field and far-field paths and the user’s location. Simulation results show that PD-OMP can accurately estimate the channel when antenna spacing is below half wavelength and outperform current state-of-the-art hybrid-field channel estimation methods.","PeriodicalId":13431,"journal":{"name":"IEEE Transactions on Wireless Communications","volume":"23 11","pages":"15798-15813"},"PeriodicalIF":8.9,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141877432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Distributed Coherent Mesh Beamforming (DisCoBeaM) for Robust Wireless Communications 用于稳健无线通信的分布式相干网状波束成形 (DisCoBeaM)

IF 8.9 1区计算机科学

IEEE Transactions on Wireless Communications Pub Date : 2024-08-01 DOI: 10.1109/TWC.2024.3433538

Jacob Holtom;Owen Ma;Andrew Herschfelt;Isabella Lenz;Yang Li;Daniel W. Bliss

{"title":"Distributed Coherent Mesh Beamforming (DisCoBeaM) for Robust Wireless Communications","authors":"Jacob Holtom;Owen Ma;Andrew Herschfelt;Isabella Lenz;Yang Li;Daniel W. Bliss","doi":"10.1109/TWC.2024.3433538","DOIUrl":"10.1109/TWC.2024.3433538","url":null,"abstract":"We implement and experimentally demonstrate a distributed, phase-coherent, mesh relay network that executes spatiotemporal beamforming on a communications signal. Each single-antenna node of this mesh network amplifies, predistorts, and forwards its reception to a receiver. In this configuration, an incoherent network of N nodes enhances the received power of a signal of interest by a factor of N compared to a single-input single-output communications link. By synchronizing these distributed nodes and constructing a spatiotemporal beamformer, we increase this factor to a maximum of \u0000<inline-formula> <tex-math>$N {^{{2}}}$ </tex-math></inline-formula>\u0000 and enable significant interference rejection capabilities. To achieve phase-coherence across the network elements, we execute a distributed synchronization algorithm using training data from the source node. We construct spatiotemporal beamformers by solving an MMSE optimization, which we continually reoptimize using new observations of training sequences and updated channel estimates. We present results from two over-the-air experimental demonstrations, one without and one with an external interferer. In the former, we demonstrate a 17.4 dB signal-to-noise ratio (SNR) improvement compared to the 18.1 dB theoretical bound for an eight-element network. In the latter, we demonstrate an 11.3 dB SNR improvement and a 14.6 dB interference reduction.","PeriodicalId":13431,"journal":{"name":"IEEE Transactions on Wireless Communications","volume":"23 11","pages":"15814-15828"},"PeriodicalIF":8.9,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10620373","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141877430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Radio Tomographic Imaging With Reconfigurable Intelligent Surfaces 利用可重构智能表面进行无线电断层成像

IF 8.9 1区计算机科学

IEEE Transactions on Wireless Communications Pub Date : 2024-07-31 DOI: 10.1109/TWC.2024.3433011

Zan Li;Amartansh Dubey;Shanpu Shen;Neel Kanth Kundu;Junhui Rao;Ross Murch

{"title":"Radio Tomographic Imaging With Reconfigurable Intelligent Surfaces","authors":"Zan Li;Amartansh Dubey;Shanpu Shen;Neel Kanth Kundu;Junhui Rao;Ross Murch","doi":"10.1109/TWC.2024.3433011","DOIUrl":"10.1109/TWC.2024.3433011","url":null,"abstract":"Radio tomographic imaging (RTI) is a device-free sensing technology that can image the radio frequency (RF) attenuation of physical objects in the environment. RTI uses received signal strength (RSS) information from a wireless communication network (WCN) to perform image reconstruction. However it requires a dense WCN consisting of a large number of nodes making it difficult to apply in realistic WCN. In this paper we investigate the performance of RTI when reconfigurable intelligent surfaces (RISs) are integrated into the WCN for integrated sensing and communication (ISAC). This approach can potentially enable the use of RTI in realistic WCN without a large number of nodes. Theoretical and numerical comparisons based on the Cramér-Rao Lower Bound (CRLB) are provided to verify the improvement on sensing performance brought by RIS. The scaling behavior of the reconstruction error as a function of the number of RIS element groups is also derived. Simulations are conducted to validate the proposed RIS-RTI system with a limited number of nodes. The results indicate that incorporating RIS can reduce the necessary number of nodes by more than a half while maintaining high-quality reconstruction compared to a network without RIS.","PeriodicalId":13431,"journal":{"name":"IEEE Transactions on Wireless Communications","volume":"23 11","pages":"15784-15797"},"PeriodicalIF":8.9,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141862203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cramér-Rao Bound and Secure Transmission Trade-Off Design for Semi-IRS-Enabled ISAC 半 IRS 支持的 ISAC 的克拉梅尔-拉奥约束和安全传输权衡设计

IF 8.9 1区计算机科学

IEEE Transactions on Wireless Communications Pub Date : 2024-07-30 DOI: 10.1109/TWC.2024.3432790

Wenjing Wei;Xiaowei Pang;Xiaoqi Qin;Shiqi Gong;Chengwen Xing;Nan Zhao;Dusit Niyato

{"title":"Cramér-Rao Bound and Secure Transmission Trade-Off Design for Semi-IRS-Enabled ISAC","authors":"Wenjing Wei;Xiaowei Pang;Xiaoqi Qin;Shiqi Gong;Chengwen Xing;Nan Zhao;Dusit Niyato","doi":"10.1109/TWC.2024.3432790","DOIUrl":"10.1109/TWC.2024.3432790","url":null,"abstract":"Integrated sensing and communication (ISAC) has evolved into an influential technique to ameliorate energy and spectrum scarcity via co-designing these two functionalities. However, the target can be a potential eavesdropper aiming at wiretapping the information transmitted to the communication user. This paper studies a semi-passive intelligent reflecting surface (IRS) enabled ISAC system, where the IRS is employed to assist the secure communication and simultaneously perform the target sensing based on the echo signals received by the dedicated sensor at the IRS. Specifically, we model two types of targets, namely point targets and extended targets. The direction-of-arrival (DoA) of the former and the complete target response matrix of the latter should be estimated. Under this configuration, we derive the Cramér-Rao bound (CRB) as the performance metric of target estimation. To achieve an optimal performance trade-off, we formulate a weighted optimization problem that balances maximizing the secrecy rate and minimizing the CRB, via jointly optimizing the transmit beamforming and the phase shifts of IRS. Then, we employ the alternating optimization, successive convex approximation and semi-definite relaxation to tackle the proposed non-convex problems for the two target cases. Simulation results show the effectiveness of the proposed schemes compared with benchmarks.","PeriodicalId":13431,"journal":{"name":"IEEE Transactions on Wireless Communications","volume":"23 11","pages":"15753-15767"},"PeriodicalIF":8.9,"publicationDate":"2024-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141857899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Blind Beamforming for Coverage Enhancement With Intelligent Reflecting Surface 利用智能反射面进行盲波束成形以增强覆盖范围

IF 8.9 1区计算机科学

IEEE Transactions on Wireless Communications Pub Date : 2024-07-26 DOI: 10.1109/TWC.2024.3431291

Fan Xu;Jiawei Yao;Wenhai Lai;Kaiming Shen;Xin Li;Xin Chen;Zhi-Quan Luo

{"title":"Blind Beamforming for Coverage Enhancement With Intelligent Reflecting Surface","authors":"Fan Xu;Jiawei Yao;Wenhai Lai;Kaiming Shen;Xin Li;Xin Chen;Zhi-Quan Luo","doi":"10.1109/TWC.2024.3431291","DOIUrl":"10.1109/TWC.2024.3431291","url":null,"abstract":"Conventional policy for configuring an intelligent reflecting surface (IRS) typically requires channel state information (CSI), thus incurring substantial overhead costs and facing incompatibility with the current network protocols. This paper proposes a blind beamforming strategy in the absence of CSI, aiming to boost the minimum signal-to-noise ratio (SNR) among all the receiver positions, namely the coverage enhancement. Although some existing works already consider the IRS-assisted coverage enhancement without CSI, they assume certain position-channel models through which the channels can be recovered from the geographic locations. In contrast, our approach solely relies on the received signal power data, not assuming any position-channel model. We examine the achievability and converse of the proposed blind beamforming method. If the IRS has N reflective elements and there are U receiver positions, then our method guarantees the minimum SNR of \u0000<inline-formula> <tex-math>$Omega (N^{2}/U)$ </tex-math></inline-formula>\u0000—which is fairly close to the upper bound \u0000<inline-formula> <tex-math>$O(N+N^{2}sqrt {ln (NU)}/sqrt [{4}]{U})$ </tex-math></inline-formula>\u0000. Aside from the simulation results, we justify the practical use of blind beamforming in a field test at 2.6 GHz. According to the real-world experiment, the proposed blind beamforming method boosts the minimum SNR across seven random positions in a conference room by 18.22 dB, while the position-based method yields a boost of 12.08 dB.","PeriodicalId":13431,"journal":{"name":"IEEE Transactions on Wireless Communications","volume":"23 11","pages":"15736-15752"},"PeriodicalIF":8.9,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141794778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integrated Sensing and Communications Toward Proactive Beamforming in mmWave V2I via Multi-Modal Feature Fusion (MMFF) 通过多模式特征融合 (MMFF) 在毫米波 V2I 中实现主动波束成形的综合传感与通信技术

IF 8.9 1区计算机科学

IEEE Transactions on Wireless Communications Pub Date : 2024-06-20 DOI: 10.1109/TWC.2024.3401686

Haotian Zhang;Shijian Gao;Xiang Cheng;Liuqing Yang

{"title":"Integrated Sensing and Communications Toward Proactive Beamforming in mmWave V2I via Multi-Modal Feature Fusion (MMFF)","authors":"Haotian Zhang;Shijian Gao;Xiang Cheng;Liuqing Yang","doi":"10.1109/TWC.2024.3401686","DOIUrl":"10.1109/TWC.2024.3401686","url":null,"abstract":"The future of vehicular communication networks relies on mmWave massive multi-input-multi-output antenna arrays for intensive data transfer and massive vehicle access. However, reliable vehicle-to-infrastructure links require exact alignment between the narrow beams, which traditionally involves excessive signaling overhead. To address this issue, we propose a novel proactive beamforming scheme that integrates multi-modal sensing and communications via Multi-Modal Feature Fusion Network (MMFF-Net), which is composed of multiple neural network components with distinct functions. Unlike existing methods that rely solely on communication processing, our approach obtains comprehensive environmental features to improve beam alignment accuracy. We verify our scheme on the Vision-Wireless (ViWi) dataset, which we enriched with realistic vehicle drifting behavior. Our proposed MMFF-Net achieves more accurate and stable angle prediction, which in turn increases the achievable rates and reduces the communication system outage probability. Even in complex dynamic scenarios with adverse environment conditions, robust prediction results can be guaranteed, demonstrating the feasibility and practicality of the proposed proactive beamforming approach.","PeriodicalId":13431,"journal":{"name":"IEEE Transactions on Wireless Communications","volume":"23 11","pages":"15721-15735"},"PeriodicalIF":8.9,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141448625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0