2022 International Symposium on Wireless Communication Systems (ISWCS)最新文献_第4页

Multi-objective Optimization of Energy and Latency in URLLC-enabled Wireless VR Networks 基于url的无线VR网络中能量和时延的多目标优化

2022 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2022-10-19 DOI: 10.1109/ISWCS56560.2022.9940418

Xinyu Gao, Yixuan Zou, Wenqiang Yi, Jiaqi Xu, Ruiqi Liu, Yuanwei Liu

引用次数: 2

Variational Bayesian Inference Based Channel Estimation for OTFS System with LSM Prior 基于变分贝叶斯推理的LSM先验OTFS系统信道估计

2022 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2022-10-19 DOI: 10.1109/ISWCS56560.2022.9940257

Qiankun Wang, M. Lei, Ming-Min Zhao, Min-Jian Zhao

引用次数: 0

Constructive Interference Precoding for Downlink NOMA 下行NOMA的构造干扰预编码

2022 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2022-10-19 DOI: 10.1109/ISWCS56560.2022.9940349

Mengchun Yan, Yingyang Chen, Miaowen Wen, Shancheng Zhao, Zhetao Li

{"title":"Constructive Interference Precoding for Downlink NOMA","authors":"Mengchun Yan, Yingyang Chen, Miaowen Wen, Shancheng Zhao, Zhetao Li","doi":"10.1109/ISWCS56560.2022.9940349","DOIUrl":"https://doi.org/10.1109/ISWCS56560.2022.9940349","url":null,"abstract":"Non-orthogonal multiple access (NOMA) plays a significant role in improving bandwidth efficiency through sharing the spectrum among multiple users. However, the weaker users in the NOMA system will suffer from interference caused by stronger users when decoding their own symbols. In this paper, we design constructive interference precoding for downlink NOMA to make the interference experienced by weaker users beneficial and further improve their communication quality. Specifically, the transmit power optimization problem under symbol level precoding (SLP) constraints at weaker users is formulated to reduce the power consumption while guaranteeing the quality of service of all users and successful successive interference cancellation (SIC). Afterward, by utilizing some approximate methods, an iterative algorithm is proposed to handle the non-convex problem. Simulation results show that the proposed scheme significantly saves the power consumption compared to the conventional NOMA. Furthermore, compared to the classical SLP scheme, the proposed scheme maintains its feasibility in an overloaded deployment, and shows its superiority for receivers with a low signal-to-interference-plus-noise ratio (SINR) target and a relatively large disparity in channel strengths.","PeriodicalId":141258,"journal":{"name":"2022 International Symposium on Wireless Communication Systems (ISWCS)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114948431","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

Age of Information With Product Coded $text{IoT}$ Systems 信息时代与产品编码$text{IoT}$系统

2022 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2022-10-19 DOI: 10.1109/ISWCS56560.2022.9940344

Wenrui Zhang, Ming Jiang, Chunming Zhao

{"title":"Age of Information With Product Coded $text{IoT}$ Systems","authors":"Wenrui Zhang, Ming Jiang, Chunming Zhao","doi":"10.1109/ISWCS56560.2022.9940344","DOIUrl":"https://doi.org/10.1109/ISWCS56560.2022.9940344","url":null,"abstract":"In this paper, an Internet of things(IoTs) scenario with short packet coding is studied in which a large number of sensors transmit short packets to the edge server through a sink node using a product code. Two main requirements are considered in this scenario which focuses on lower AoI and higher reliability (lower packet error rate, PER). In previous works, short packets are usually encoded into a long packet to improve reliability, which leads to large AoI. In this paper, a product coded packet scheme is considered because the joint packet encoding scheme using product code can be decoded by two ways, decoding of each row/column component code and joint iterative decoding of all component codes. Both of them may lead to a successfully decoding which greatly improves the AoI performance under the same PER conditions. The expression of the average AoI in this IoT system is derived, and the theoretical and numerical results show the relationships between packet length, the number of sensors and AoI performance. Furthermore, the optimal number of jointly-coded packets to minimize the AoI performance also are discussed and illustrated.","PeriodicalId":141258,"journal":{"name":"2022 International Symposium on Wireless Communication Systems (ISWCS)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129731434","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

Energy-Efficient Scheduling in RIS-aided MEC Networks with NOMA and Finite Blocklength Codes 基于NOMA和有限块长码的ris辅助MEC网络节能调度

2022 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2022-10-19 DOI: 10.1109/ISWCS56560.2022.9940327

Yang Yang, M. C. Gursoy

{"title":"Energy-Efficient Scheduling in RIS-aided MEC Networks with NOMA and Finite Blocklength Codes","authors":"Yang Yang, M. C. Gursoy","doi":"10.1109/ISWCS56560.2022.9940327","DOIUrl":"https://doi.org/10.1109/ISWCS56560.2022.9940327","url":null,"abstract":"In this paper, energy efficiency is analyzed in a reconfigurable intelligent surface (RIS) aided mobile edge computing (MEC) network. The offloading decisions at the user equipments (UEs), computational resource allocation strategies at the MEC server, and the choice of RIS reflecting coefficients are jointly taken into consideration. To address the latency requirements, the use of finite blocklength (FBL) codes is considered in the uplink transmission, which also utilizes non-orthogonal multiple access (NOMA) for improved efficiency in resource usage. A UE-grouping scheme is introduced to group the UEs for NOMA transmission, and a dynamic CPU frequency allocation algorithm at the MEC server is developed. The primary objective is to maximize the overall energy efficiency of the RIS-aided MEC network under both decoding error rate and latency constraints. For this purpose, a four-step algorithm is devised to optimize RIS reflecting coefficients, offloaded data bits, offloading blocklength, and MEC frequency allocations. Simulation results illustrate the effectiveness of our proposed algorithm and the importance of UE scheduling with NOMA transmission.","PeriodicalId":141258,"journal":{"name":"2022 International Symposium on Wireless Communication Systems (ISWCS)","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134633757","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

A Zeroth-Order Block Coordinate Gradient Descent Method For Cellular Network Optimization 蜂窝网络优化的零阶块坐标梯度下降法

2022 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2022-10-19 DOI: 10.1109/ISWCS56560.2022.9940430

Pengcheng He, Siyuan Lu, Xin Guan, Yibin Kang, Qingjiang Shi

引用次数: 1

Joint Detection for Massive Grant-free Access via BiGAMP 通过BiGAMP进行大规模无授权访问的联合检测

2022 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2022-10-19 DOI: 10.1109/ISWCS56560.2022.9940392

Shanshan Zhang, Ying Cui, Wen Chen

{"title":"Joint Detection for Massive Grant-free Access via BiGAMP","authors":"Shanshan Zhang, Ying Cui, Wen Chen","doi":"10.1109/ISWCS56560.2022.9940392","DOIUrl":"https://doi.org/10.1109/ISWCS56560.2022.9940392","url":null,"abstract":"With the explosive growth of the number of devices accessing the network, massive access has been a challenging task for the fifth generation (5G) and beyond. The uplink massive access scenario has the feature that only a subset of potential devices is active in each coherence time. In this paper, to serve more devices with lower overhead in massive access scenarios, we adopt a grant-free scheme where devices are allocated unique non-orthogonal pilots. We also design a kind of bilinear generalized approximate message passing (BiGAMP) algorithm which utilizes the row sparse channel matrix structure due to sporadic device access. In this work, the proposed algorithm jointly detects device activities, estimates channels, and detects signals in massive multiple-input multiple-output (MIMO) systems with one phase. The signal observation affords additional information to improve performance compared to other algorithms. In addition, we further analyze state evolution (SE) to characterize the per-formance of the BiGAMP algorithm. The numerical results demonstrate that the proposed algorithm performs better than baselines in device activity detection, channel estimation, and signal detection. And the numerical results of SE can describe the performance of the proposed algorithm.","PeriodicalId":141258,"journal":{"name":"2022 International Symposium on Wireless Communication Systems (ISWCS)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115116347","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

Cluster Precoders for Cell-Free MU-MIMO Systems 无小区MU-MIMO系统的聚类预编码器

2022 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2022-10-19 DOI: 10.1109/ISWCS56560.2022.9940415

A. Flores, R. D. Lamare, K. Mishra

{"title":"Cluster Precoders for Cell-Free MU-MIMO Systems","authors":"A. Flores, R. D. Lamare, K. Mishra","doi":"10.1109/ISWCS56560.2022.9940415","DOIUrl":"https://doi.org/10.1109/ISWCS56560.2022.9940415","url":null,"abstract":"Cell-free (CF) multiple-input multiple-output systems employ distributed access points (APs) to enhance their performance. In the downlink, CF systems resort to precoding techniques to overcome multiuser interference. However, network-wide precoders incur high computational and signaling costs that cannot be afforded by practical systems. Therefore, we develop user-centric precoders that use clusters of APs for downlink transmission. The clusters are formed by employing the large-scale fading coefficients between users and APs. An antenna selection policy is proposed to define the clusters of APs. Different from other techniques, we also employ a user selection matrix to restrict which users are taken into account in the computation of the precoder. Two major benefits emerge from the proposed approach. First, the computational cost is reduced because several channel estimates are unnecessary. Second, the computational complexity of the precoder is reduced by restricting the number of users, which leads to matrices with reduced size. Closed-form expressions to compute the sum-rate of the proposed precoders are derived. Numerical results demonstrate that our approach can attain more than 90% of the network-wide precoders performance, while offering lower costs.","PeriodicalId":141258,"journal":{"name":"2022 International Symposium on Wireless Communication Systems (ISWCS)","volume":"8 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114101866","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

Multi-Grid-Based Localized Statistical Channel Modeling: A Radio Map Approach 基于多网格的局部统计信道建模:一种无线电地图方法

2022 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2022-10-19 DOI: 10.1109/ISWCS56560.2022.9940390

Xinzhi Ning, Shutao Zhang, Xiayu Zheng, Tsung-Hui Chang

{"title":"Multi-Grid-Based Localized Statistical Channel Modeling: A Radio Map Approach","authors":"Xinzhi Ning, Shutao Zhang, Xiayu Zheng, Tsung-Hui Chang","doi":"10.1109/ISWCS56560.2022.9940390","DOIUrl":"https://doi.org/10.1109/ISWCS56560.2022.9940390","url":null,"abstract":"Localized channel modeling is paramount for 5G cellular network optimization. However, the existing channel models either apply to general scenarios and can not well match the localized geographical structures of physical environment, or have high computational complexity. In this paper, we propose a localized statistical channel modeling (LSCM) based on the radio map, which is aware of the targeted propagation environment. Instead of using channel impulse response, LSCM solely relies on the reference signal receiving power (RSRP), which can be expressed as a linear model of the channel's angular power spectrum (APS). Based on this, we formulate the task of channel modeling as a sparse recovery problem where the non-zero entries of the APS indicate the channel paths' power and angles of departure. In order to achieve good channel modeling performance, we propose a multi-grid-based APS estimation scheme which can make our LSCM more accurate. To exploit the similarities of the channel paths from adjacent grids, construct the radio map by interpolating the RSRP, and cluster the grids in beamspace. A novel regularization term that constrains both sparsity and similarity is also proposed to address the multi-grid-based LSCM problem. At last, extensive simulations based on both synthetic and real RSRP measurements are presented to verify the performance of the proposed channel model.","PeriodicalId":141258,"journal":{"name":"2022 International Symposium on Wireless Communication Systems (ISWCS)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123799202","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

Enhanced Physical Layer Secure Key Generation using mm Wave Beamforming 增强物理层安全密钥生成使用毫米波波束成形

2022 International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2022-10-19 DOI: 10.1109/ISWCS56560.2022.9940347

Navaneetha C. Manjappa, L. Wimmer, N. Maletic, E. Grass

引用次数: 1