China Communications最新文献_第2页

High-accuracy NLOS identification based on random forest and high-precision positioning on 60 GHz millimeter wave 基于随机森林和 60 GHz 毫米波高精度定位的高精度 NLOS 识别

IF 4.1 3区计算机科学

China Communications Pub Date : 2023-12-01 DOI: 10.23919/JCC.fa.2021-0742.202312

Qiuna Niu, Wei Shi, Yongdao Xu, Weijun Wen

引用次数: 0

Deep learning based signal detector for OFDM systems 基于深度学习的 OFDM 系统信号检测器

IF 4.1 3区计算机科学

China Communications Pub Date : 2023-12-01 DOI: 10.23919/JCC.fa.2021-0347.202312

Guangliang Pan, Wei Wang, Minglei Li

{"title":"Deep learning based signal detector for OFDM systems","authors":"Guangliang Pan, Wei Wang, Minglei Li","doi":"10.23919/JCC.fa.2021-0347.202312","DOIUrl":"https://doi.org/10.23919/JCC.fa.2021-0347.202312","url":null,"abstract":"In this paper, we propose a novel deep learning (DL)-based receiver design for orthogonal frequency division multiplexing (OFDM) systems. The entire process of channel estimation, equalization, and signal detection is replaced by a neural network (NN), and hence, the detector is called a NN detector (N2D). First, an OFDM signal model is established. We analyze both temporal and spectral characteristics of OFDM signals, which are the motivation for DL. Then, the generated data based on the simulation of channel statistics is used for offline training of bi-directional long short-term memory (Bi-LSTM) NN. Especially, a discriminator (F) is added to the input of Bi-LSTM NN to look for subcarrier transmission data with optimal channel gain (OCG), which can greatly improve the performance of the detector. Finally, the trained N2D is used for online recovery of OFDM symbols. The performance of the proposed N2D is analyzed theoretically in terms of bit error rate (BER) by Monte Carlo simulation under different parameter scenarios. The simulation results demonstrate that the BER of N2D is obviously lower than other algorithms, especially at high signal-to-noise ratios (SNRs). Meanwhile, the proposed N2D is robust to the fluctuation of parameter values.","PeriodicalId":9814,"journal":{"name":"China Communications","volume":"39 1","pages":"66-77"},"PeriodicalIF":4.1,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139016808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Secure short-packet transmission in uplink massive MU-MIMO assisted URLLC under imperfect CSI 不完全CSI下上行海量MU-MIMO辅助URLLC的安全短包传输

IF 4.1 3区计算机科学

China Communications Pub Date : 2023-12-01 DOI: 10.23919/jcc.ea.2021-0067.202302

Tianyue Yu, Xiaoli Sun, Yueming Cai, Z. Zhu

{"title":"Secure short-packet transmission in uplink massive MU-MIMO assisted URLLC under imperfect CSI","authors":"Tianyue Yu, Xiaoli Sun, Yueming Cai, Z. Zhu","doi":"10.23919/jcc.ea.2021-0067.202302","DOIUrl":"https://doi.org/10.23919/jcc.ea.2021-0067.202302","url":null,"abstract":"Ultra-reliable and low-latency communication (URLLC) is still in the early stage of research due to its two strict and conflicting requirements, i.e., ultra-low latency and ultra-high reliability, and its impact on security performance is still unclear. Specifically, short-packet communication is expected to meet the delay requirement of URLLC, while the degradation of reliability caused by it makes traditional physical-layer security metrics not applicable. In this paper, we investigate the secure short-packet transmission in uplink massive multiuser multiple-input-multiple-output (MU-MIMO) system under imperfect channel state information (CSI). We propose an artificial noise scheme to improve the security performance of the system and use the system average secrecy throughput (AST) as the analysis metric. We derive the approximate closed-form expression of the system AST and further analyze the system asymptotic performance in two regimes. Furthermore, a one-dimensional search method is used to optimize the maximum system AST for a given pilot length. Numerical results verify the correctness of theoretical analysis, and show that there are some parameters that affect the tradeoff between security and latency. Moreover, appropriately increasing the number of antennas at the base station (BS) and transmission power at user devices (UDs) can increase the system AST to achieve the required threshold.","PeriodicalId":9814,"journal":{"name":"China Communications","volume":"1 1","pages":"196-211"},"PeriodicalIF":4.1,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68734342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

ELM-based impact analysis of meteorological parameters on the radio transmission of X-band over the Qiongzhou Strait of China 基于 ELM 的气象参数对中国琼州海峡 X 波段无线电传输的影响分析

IF 4.1 3区计算机科学

China Communications Pub Date : 2023-12-01 DOI: 10.23919/JCC.fa.2022-0687.202312

Cheng Yang, Yafei Shi, Jian Wang, Jianguo Ma

{"title":"ELM-based impact analysis of meteorological parameters on the radio transmission of X-band over the Qiongzhou Strait of China","authors":"Cheng Yang, Yafei Shi, Jian Wang, Jianguo Ma","doi":"10.23919/JCC.fa.2022-0687.202312","DOIUrl":"https://doi.org/10.23919/JCC.fa.2022-0687.202312","url":null,"abstract":"Communication in the evaporation duct layer is greatly affected by the variation of meteorological parameters. Based on the experimental result of the radio transmission of the X-band over the Qiongzhou Strait of China, the characteristic of the duct and its influence on the transmission effect is analyzed. The results indicate that the evaporation duct height (EDH) has a negative Spearman's rank correlation of −0.90 with the relative humidity and a positive correlation coefficient of 0.84 with the wind speed. Based on the Extreme Learning Machine (ELM) network, we proposed a Met-ELM model that can provide efficient support in predicting propagation characteristics at nighttime. The predicted results of the MetELM model are consistent with the measurements; the root-mean-square-error is 1.66 dB, with the correlation coefficient reaching 0.96, while the proportion of mean absolute error less than 2 dB has reached 81.41%. The data-derived Met-ELM model shows great accuracy in predicting propagation characteristics at nighttime, which also meets the acceptable requirements for radio wave propagation.","PeriodicalId":9814,"journal":{"name":"China Communications","volume":"47 1","pages":"244-256"},"PeriodicalIF":4.1,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139018851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

An overview of interactive immersive services 交互式沉浸式服务概述

IF 4.1 3区计算机科学

China Communications Pub Date : 2023-12-01 DOI: 10.23919/jcc.ea.2022-0355.202302

Xiaozhi Yuan, Qingyang Wang, Linfeng Zhang, Li Peng, Xiaojie Zhu, Jinlan Ma, Zhan Liu, Yuxiang Jiang

引用次数: 0

Performance analysis in SWIPT-based bidirectional D2D communications in cellular networks 基于 SWIPT 的蜂窝网络双向 D2D 通信的性能分析

IF 4.1 3区计算机科学

China Communications Pub Date : 2023-12-01 DOI: 10.23919/JCC.fa.2022-0554.202312

Yang Zhang, Wei Wang, Xiang Zhao, Jun Hou

引用次数: 0

Joint optimization scheme for the reconfigurable intelligent surface-assisted untrusted relay networks 可重构智能表面辅助非信任中继网络的联合优化方案

IF 4.1 3区计算机科学

China Communications Pub Date : 2023-12-01 DOI: 10.23919/JCC.ea.2021-0806.202302

L. Gong, Wei Xu, Xiaoxiu Ding, Nanrun Zhou, Qibiao Zhu

引用次数: 0

Single-layer symmetrical full-port quasi-absorptive filtering phase shifter 单层对称全端口准吸收滤波移相器

IF 4.1 3区计算机科学

China Communications Pub Date : 2023-12-01 DOI: 10.23919/JCC.ea.2021-0764.202302

Qingxiang Dong, Yongle Wu, Weijuan Chen, Yuhao Yang, Weimin Wang

引用次数: 0

Spatial modeling and reliability analyzing of reconfigurable intelligent surfaces-assisted Fog-RAN with repulsion 具有斥力的可重构智能表面辅助 Fog-RAN 的空间建模和可靠性分析

IF 4.1 3区计算机科学

China Communications Pub Date : 2023-12-01 DOI: 10.23919/JCC.ea.2022-0199.202302

L. Feng, Zhizhong Zhang, Haonan Hu, Errong Pei, Yun Li

{"title":"Spatial modeling and reliability analyzing of reconfigurable intelligent surfaces-assisted Fog-RAN with repulsion","authors":"L. Feng, Zhizhong Zhang, Haonan Hu, Errong Pei, Yun Li","doi":"10.23919/JCC.ea.2022-0199.202302","DOIUrl":"https://doi.org/10.23919/JCC.ea.2022-0199.202302","url":null,"abstract":"Reconfigurable Intelligent Surface (RIS), fog computing, and Cell-Free (CF) network architecture are three promising technologies for application to the Ultra-Reliable Low Latency Communication (URLLC) scenario in 6G mobile communication systems. This paper considers a RIS-assisted FogRadio Access Network (Fog-RAN) architecture where a) the repulsively distributed Fog-Access Points (F-APs) communicate in a CF manner to suppress inter-cell interference, b) RISs are introduced into the CF network to avoid shadowing and enhance the system performance, and c) fog computing evolved as cloud services providers at the edge of the network and an enabler for constructing a multi-layer computing power RAN. Then, we derive and validate the integral form of the maximum F-AP offloading probability and Successful Delivery Probability (SDP) of this RIS-assisted Fog-RAN over composite Fisher-Snedecor F fading, where the spatial effects are reconsidered with the assumption that the F-APs are modelled as a Beta Ginibre Point Process (β-GPP). The numeric and simulation results indicate that for the investigated RIS-assisted Fog-RAN, the β-GPP-based deployment of F-APs can increase maximum of 8% of the SDP within the repulsion-effective range, compared with the Matern Cluster Process (MCP)-based ones. Also, deploying more RISs per F-AP offers more significant SDP improvements.","PeriodicalId":9814,"journal":{"name":"China Communications","volume":"32 2","pages":"142-155"},"PeriodicalIF":4.1,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139018051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Dynamic spectrum anti-jamming with distributed learning and transfer learning 利用分布式学习和迁移学习进行动态频谱抗干扰

IF 4.1 3区计算机科学

China Communications Pub Date : 2023-12-01 DOI: 10.23919/JCC.fa.2022-0626.202312

Xinyu Zhu, Yang Huang, Delong Liu, Qihui Wu, Xiaohu Ge, Yuan Liu

{"title":"Dynamic spectrum anti-jamming with distributed learning and transfer learning","authors":"Xinyu Zhu, Yang Huang, Delong Liu, Qihui Wu, Xiaohu Ge, Yuan Liu","doi":"10.23919/JCC.fa.2022-0626.202312","DOIUrl":"https://doi.org/10.23919/JCC.fa.2022-0626.202312","url":null,"abstract":"Physical-layer security issues in wireless systems have attracted great attention. In this paper, we investigate the spectrum anti-jamming (AJ) problem for data transmissions between devices. Considering fast-changing physical-layer jamming attacks in the time/frequency domain, frequency resources have to be configured for devices in advance with unknown jamming patterns (i.e. the time-frequency distribution of the jamming signals) to avoid jamming signals emitted by malicious devices. This process can be formulated as a Markov decision process and solved by reinforcement learning (RL). Unfortunately, state-of-the-art RL methods may put pressure on the system which has limited computing resources. As a result, we propose a novel RL, by integrating the asynchronous advantage actor-critic (A3C) approach with the kernel method to learn a flexible frequency pre-configuration policy. Moreover, in the presence of time-varying jamming patterns, the traditional AJ strategy can not adapt to the dynamic interference strategy. To handle this issue, we design a kernel-based feature transfer learning method to adjust the structure of the policy function online. Simulation results reveal that our proposed approach can significantly outperform various baselines, in terms of the average normalized throughput and the convergence speed of policy learning.","PeriodicalId":9814,"journal":{"name":"China Communications","volume":"79 ","pages":"52-65"},"PeriodicalIF":4.1,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139017200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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