PREAMBLE

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Preamble slice orderly queue access scheme in cell-free dense communication systems
《Digital Communications and Networks》2025年第1期126-135,共10页Jun Sun Mengzhu Guo Jian Liu 
supported in part by the National Natural Science Foundation of China under grants 61771255;in part by the Provincial and Ministerial Key Laboratory Open Project under grant 20190904;in part by the Key Technologies R&D Program of Jiangsu (Prospective and Key Technologies for Industry)under Grants BE2022067,BE2022067-1 and BE2022067-2。
High reliability applications in dense access scenarios have become one of the main goals of 6G environments.To solve the access collision of dense Machine Type Communication(MTC)devices in cell-free communication sys...
关键词：Machine type communication Random access Reinforcement learning Access success probability Federated learning 
Intelligent Preamble Allocation for Coexistence of mMTC/URLLC Devices:A Hierarchical Q-Learning Based Approach
《China Communications》2023年第8期44-53,共10页Jiadai Wang Chaochao Xing Jiajia Liu 
supported by National Key R&D Program of China (2022YFB3104200);in part by National Natural Science Foundation of China (62202386);in part by Basic Research Programs of Taicang (TC2021JC31);in part by Fundamental Research Funds for the Central Universities (D5000210817);in part by Xi’an Unmanned System Security and Intelligent Communications ISTC Center;in part by Special Funds for Central Universities Construction of World-Class Universities (Disciplines) and Special Development Guidance (0639022GH0202237 and 0639022SH0201237)
The emergence of various commercial and industrial Internet of Things(IoT)devices has brought great convenience to people’s life and production.Both low-power,massively connected mMTC devices(MDs)and highly reliable,...
关键词：preamble allocation random access mMTC URLLC reinforcement learning 
A robust symbol timing strategy for cellular systems
《Digital Communications and Networks》2023年第3期757-768,共12页Yangpeng Dan Jianxin Yi Xianrong Wan Yunhua Rao Yan Liu 
supported in part by the National Natural Science Foundation of China(61931015,62071335);in part by the Natural Science Foundation of Hubei Province of China(2021CFA002);in part by the Fundamental Research Funds for the Central Universities;in part by the Technological Innovation Project of Hubei Province of China(2019AAA061);in part by the Science and Technology Program of Shenzhen(JCYJ20170818112037398).
In cellular systems,establishing the initial symbol timing of potential preambles is the first step of a cell search.The envelope fluctuation of the downlink signal hinders the successful timing of conventional symbol...
关键词：Symbol timing SYNCHRONIZATION PREAMBLE Cell search Cellular system Envelope fluctuation 
New Preamble Sequence for WiMAX System with Improved Synchronization Accuracy
《Intelligent Automation & Soft Computing》2023年第3期3187-3197,共11页Suma Sekhar Sakuntala S.Pillai S.Santhosh Kumar 
Worldwide Interoperability for Microwave Access(WiMAX)trusts Multiple Input Multiple Output-Orthogonal Frequency Division Multiplexing(MIMO-OFDM)combination for the deployment of physical layer functions and for conne...
关键词：WIMAX MIMO OFDM time offset carrier frequency offset preamble sequence integrated sidelobe level merit factor 
A layered grouping random access scheme based on dynamic preamble selection for massive machine type communications被引量：1
《Science China(Information Sciences)》2022年第7期265-266,共2页Gaofeng CHENG Huan CHEN Pingzhi FAN Li LI Li HAO 
supported by National Key R&D Project (Grant No. 2018YFB1801104);National Natural Science Foundation of China (Grant Nos. 62020106001,62071394);111 Project (Grant No. 111-2-14);Sichuan Science and Technology Program (Grant No. 2020YFH0011)。
Dear editor,The massive random access(RA)schemes in the existing literature are mainly grant-free approaches,which are supported by non-orthogonal multiple access[1–3],compressive sensing(CS)[4,5],group paging[2,6],a...
关键词：EDITOR networks MASSIVE 
The Adaptive Random Access Carrier Allocation Scheme in NB-IoT Networks
《Communications and Network》2022年第1期1-11,共11页Yen-Wen Chen Guan-Yi Xue 
The rapid progress of the deployment of IoT services pushes the evolution of wireless communication techniques. Because the number of IoT devices is much more than that of the human-held devices for traditional servic...
关键词：NB-IoT Random Access PREAMBLE Radio Resource Allocation 
A Preamble-Based MAC Mechanism in Ad-Hoc Network被引量：1
《Journal of Communications and Information Networks》2022年第1期60-71,共12页Chenchao Shi Biqian Feng Yongpeng Wu Wenjun Zhang 
the National Key R&D Program of China(2018YFB1801102);the National Science Foundation(NSFC)(62122052);the National Science Foundation(NSFC)(62071289)。
In this paper, we propose a preamble-based medium access control (P-MAC) mechanism in Ad-Hoc network.Different from traditional carrier sense multiple access(CSMA)in Ad-Hoc network,P-MAC uses a much shorter preamble t...
关键词：P-MAC Ad-Hoc network CSMA PLC 
基于5G超远覆盖技术的研究与实践被引量：10
《电信工程技术与标准化》2021年第10期34-40,共7页周善将 
伴随着5G网络建设的不断深入,5G行业应用的范围不断拓展,海洋渔业、离岸岛屿、近海旅游、海上边防和草原作业等特殊场景对于5G网络的覆盖需求也越来越迫切。其中对于近海海面等场景,需要依托通信网络的超远覆盖能力以实现海域的5G网络...
关键词：5G 超远覆盖 700 MHz NR Preamble 
On the Probability of Erasure for MIMO-OFDM
《Semiconductor Science and Information Devices》2020年第1期1-5,共5页Kasturi Vasudevan A.Phani Kumar Reddy Gyanesh Kumar Pathak Shivani Singh 
Detecting the presence of a valid signal is an important task of a telecommunication receiver.When the receiver is unable to detect the presence of a valid signal,due to noise and fading,it is referred to as an erasur...
关键词：Frequency selective fading ISI Millimeter-wave MIMO OFDM PREAMBLE Probability of erasure 
2018 Chinese Guidelines for Prevention and Treatment of Hypertension——A report of the Revision Committee of Chinese Guidelines for Prevention and Treatment of Hypertension被引量：125
《Journal of Geriatric Cardiology》2019年第3期182-241,共60页Joint Committee for Guideline Revision Chinese Hypertension League Chinese Society of Cardiology Hypertension Committee of the Chinese Medical Doctor Association Hypertension Branch of the China Association for the Promotion of International Exchanges of Health Care Hypertension Branch of the Chinese Geriatrics Society Li–Sheng LIU 
Table of Contents Preamble 1 Prevalence of hypertension in Chinese population 1.1 Prevalence,incidence and epidemic trend of hypertension in Chinese population 1.2 Awareness,treatment and control of Hypertension in Ch...
关键词：2018 CHINESE GUIDELINES Contents PREAMBLE Prevention and Treatment 
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