期刊文献+
共找到15篇文章
< 1 >
每页显示 20 50 100
A 24−30 GHz 8-element dual-polarized 5G FR2 phased-array transceiver IC with 20.8-dBm TX OP1dB and 4.1-dB RX NF in 65-nm CMOS
1
作者 Yongran Yi Dixian Zhao +5 位作者 Jiajun Zhang Peng Gu Chenyu Xu Yuan Chai Huiqi Liu Xiaohu You 《Journal of Semiconductors》 EI CAS CSCD 2024年第1期22-32,共11页
This article presents an 8-element dual-polarized phased-array transceiver(TRX)front-end IC for millimeter-wave(mm-Wave)5G new radio(NR).Power enhancement technologies for power amplifiers(PA)in mm-Wave 5G phased-arra... This article presents an 8-element dual-polarized phased-array transceiver(TRX)front-end IC for millimeter-wave(mm-Wave)5G new radio(NR).Power enhancement technologies for power amplifiers(PA)in mm-Wave 5G phased-array TRX are discussed.A four-stage wideband high-power class-AB PA with distributed-active-transformer(DAT)power combining and multi-stage second-harmonic traps is proposed,ensuring the mitigated amplitude-to-phase(AM-PM)distortions across wide carrier frequencies without degrading transmitting(TX)power,gain and efficiency.TX and receiving(RX)switching is achieved by a matching network co-designed on-chip T/R switch.In each TRX element,6-bit 360°phase shifting and 6-bit 31.5-dB gain tuning are respectively achieved by the digital-controlled vector-modulated phase shifter(VMPS)and differential attenuator(ATT).Fabricated in 65-nm bulk complementary metal oxide semiconductor(CMOS),the proposed TRX demonstrates the measured peak TX/RX gains of 25.5/21.3 dB,covering the 24−29.5 GHz band.The measured peak TX OP1dB and power-added efficiency(PAE)are 20.8 dBm and 21.1%,respectively.The measured minimum RX NF is 4.1 dB.The TRX achieves an output power of 11.0−12.4 dBm and error vector magnitude(EVM)of 5%with 400-MHz 5G NR FR2 OFDM 64-QAM signals across 24−29.5 GHz,covering 3GPP 5G NR FR2 operating bands of n257,n258,and n261. 展开更多
关键词 fifth-generation(5g) power amplifier millimeter-wave TRANSCEIVER PHASED-ARRAY
下载PDF
5G宏蜂窝移动通信三维圆柱MIMO多天线系统性能 被引量:2
2
作者 周杰 刘少云 +1 位作者 薛玉洁 周文轩 《太赫兹科学与电子信息学报》 北大核心 2020年第5期780-785,共6页
针对第五代(5G)宏蜂窝移动对移动(M2M)通信场景需要高效率的信号传输模型,提出一种三维(3D)圆柱多输入多输出(MIMO)信道,反映分布区域宏蜂窝传播环境,其中三维圆柱作为信号传输中的干扰对象。接收端(Rx)位于圆柱模型的中心点,发射端(Tx... 针对第五代(5G)宏蜂窝移动对移动(M2M)通信场景需要高效率的信号传输模型,提出一种三维(3D)圆柱多输入多输出(MIMO)信道,反映分布区域宏蜂窝传播环境,其中三维圆柱作为信号传输中的干扰对象。接收端(Rx)位于圆柱模型的中心点,发射端(Tx)位于散射区域之外任意位置。接收信号由视距(LoS)传播分量的总和以及由不同物体反射的非视距(NLoS)传播分量组成,该模型能够充分适应各种5G无线通信场景。此外,本文结合莱斯衰落信道、均匀分布、高斯分布、拉普拉斯分布、冯米赛斯分布研究统计信道传播特性,即发射端和接收端在不同的运动方向和运动时间的空间互相关函数(CCF)、时间自相关函数(ACF)和多普勒功率谱密度(PSD)。发射端和接收端在不同时刻的传播特性数值的Matlab分析结果与仿真结果很好地拟合,证明了所提出的三维模型对于真实的5G宏蜂窝移动通信信道是切实可行的。 展开更多
关键词 第五代(5g) 宏蜂窝 传播特性 相关函数 功率谱密度
下载PDF
一种应用于n77/n78/n79频段的双频滤波天线
3
作者 吴秋彤 严佳雯 +4 位作者 都琳 张月园 邹辉 徐慧慧 刘志伟 《太赫兹科学与电子信息学报》 2022年第7期678-683,共6页
提出了一种基于双层结构的双频滤波天线,工作在n77/n78/n79频段。该天线由上层基板的2个矩形辐射贴片和下层基板的阶跃阻抗谐振器、2个“L”型枝节组成。2块介质基板材料均为FR4,且通过探针相连。上层介质基板上的2个矩形辐射贴片激发2... 提出了一种基于双层结构的双频滤波天线,工作在n77/n78/n79频段。该天线由上层基板的2个矩形辐射贴片和下层基板的阶跃阻抗谐振器、2个“L”型枝节组成。2块介质基板材料均为FR4,且通过探针相连。上层介质基板上的2个矩形辐射贴片激发2个谐振模式,其中高频谐振用于形成n79频段,低频谐振用于形成n77/n78频段。为了获得双通带滤波效果,在下层介质基板中引入阶跃阻抗谐振器,在2个频段间形成带外辐射零点。此外,下层基板上的“L”型枝节可以引入额外的谐振点来扩大天线的带宽。该结构经过高频仿真软件(HFSS)优化,其仿真结果和测试结果均在3.37~3.53 GHz(n77/n78),4.55~4.64 GHz(n79)2个频段范围内,可用于6 GHz以下5G的无线通信应用。 展开更多
关键词 滤波天线 双频天线 边带选择性 5g
下载PDF
MIMO handset antenna for 5G/WLAN applications
4
作者 Yong CHENG Jing LU Bing-qing SHENG 《Frontiers of Information Technology & Electronic Engineering》 SCIE EI CSCD 2020年第1期182-187,共6页
We propose a dual-module multiple-input multiple-output(MIMO)antenna for portable terminals.The operating bands of the handheld terminal antenna are 5G(3.4–3.8 GHz)and WLAN(5.150–5.925 GHz).Antenna elements of 5G an... We propose a dual-module multiple-input multiple-output(MIMO)antenna for portable terminals.The operating bands of the handheld terminal antenna are 5G(3.4–3.8 GHz)and WLAN(5.150–5.925 GHz).Antenna elements of 5G and WLAN are spaced to reduce coupling between antenna elements in the same module.The return loss of all antenna elements is larger than 6 dB.The isolation between all elements is larger than 14 dB.The radiation efficiency of the high-frequency antenna is greater than 50%,and the radiation efficiency of the low-frequency antenna is greater than 40%.The far-field gain of all elements is greater than 2.2 dBi. 展开更多
关键词 fifth-generation(5g) HANDSET ANTENNA MULTIPLE-INPUT multiple-output(MIMO)antenna Decouple
原文传递
面向工业制造的确定性网络技术发展研究 被引量:13
5
作者 汪硕 王佳森 +3 位作者 蔡磊 黄韬 卢华 刘韵洁 《中国工程科学》 CSCD 北大核心 2021年第2期22-29,共8页
面向工业制造的确定性网络技术作为兼具理论创新性与技术实用性的前沿领域,对推动新一代工业互联网技术创新、促进工业制造和高质量网络融合发展具有价值,也为抢占确定性网络技术制高点、抓住新的经济增长点提供机遇。本文从制造企业、... 面向工业制造的确定性网络技术作为兼具理论创新性与技术实用性的前沿领域,对推动新一代工业互联网技术创新、促进工业制造和高质量网络融合发展具有价值,也为抢占确定性网络技术制高点、抓住新的经济增长点提供机遇。本文从制造企业、通信厂商两方面研判了面向工业制造的确定性网络技术发展需求,详细梳理了国内外面向工业制造的确定性网络技术发展现状和趋势;进一步凝练我国面向工业制造的确定性网络技术发展面临的挑战,完成了面向工业制造的确定性网络技术发展阶段划分:试点示范阶段、规模化复制阶段、自发创新驱动阶段。研究表明,我国"确定性网络+工业制造"发展需要重点关注:成立产业联盟促进生态发展,加快形成公网专用的先发优势,重视行业发展路径选取,加大应用创新发展的资源保障,加强基础理论和关键技术研究,注重"产学研"一体化人才培育。 展开更多
关键词 工业制造 工业互联网 确定性网络 时间敏感网络 第五代移动通信 服务质量
下载PDF
GNSS/5G观测量融合定位算法 被引量:5
6
作者 王森 王腾飞 +1 位作者 姚铮 邢建平 《导航定位学报》 CSCD 2023年第2期71-79,共9页
针对随着泛在位置服务的需求扩增,卫星导航系统在城市峡谷等环境下的定位效果不连续、定位精度低,无法满足服务需求的问题,提出一种全球卫星导航系统(GNSS)/第五代移动通信技术(5G)观测量融合定位算法:给出基于最小二乘法的GNSS/5G观测... 针对随着泛在位置服务的需求扩增,卫星导航系统在城市峡谷等环境下的定位效果不连续、定位精度低,无法满足服务需求的问题,提出一种全球卫星导航系统(GNSS)/第五代移动通信技术(5G)观测量融合定位算法:给出基于最小二乘法的GNSS/5G观测量融合定位算法模型;并对比分析GNSS/5G融合定位与GNSS单系统定位效果,通过增加5G到达时间差(TDOA)观测量,配合GNSS观测量参与定位解算,给出定位性能分析结果。实验结果表明,GNSS信号观测数据与5G信号TDOA观测量融合定位相比GNSS单系统定位在水平方向、三维(3D)方向定位误差优化精度分别约为64.6%、58.21%,可有效提升定位性能,为可扩展定位需求的可行性相关研究提供参考。 展开更多
关键词 全球卫星导航系统(gNSS) 第五代移动通信技术(5g) 到达时间差(TDOA) 融合定位 最小二乘法
下载PDF
Research and simulation on synchronization algorithm of PSS in a 5G system based on block cross-correlation 被引量:1
7
作者 Zheng Ruimen Wang Xiaojun +1 位作者 Pan Wei Chen Xiaoshu 《Journal of Southeast University(English Edition)》 EI CAS 2021年第3期245-250,共6页
In response to the downlink synchronization requirements of the user equipment(UE)or third-party radio equipment in fifth-generation(5G)mobile communication systems,a synchronization algorithm of primary synchroni-zat... In response to the downlink synchronization requirements of the user equipment(UE)or third-party radio equipment in fifth-generation(5G)mobile communication systems,a synchronization algorithm of primary synchroni-zation signal(PSS)was designed and developed in the 5G system based on block cross-correlation.According to the new characteristics of the 5G synchronization channel and broadcast channel,starting from the traditional downlink synchronization algorithm of long-term evolution(LTE),the detection performance of the algorithm under a low signal-to-noise ratio(SNR)is improved by introducing an incoherent accumulation,and the new scheme of joint coarse frequency offset estimation is used to improve the frequency offset estimation performance.Finally,the performance of the proposed synchronization algorithm is verified by conducting a simulation on a 5G downlink simulation platform based on MATLAB software.Simulation results show that the improved downlink synchronization algorithm has stable performance in the tapped delay line-C(TDL-C)and additive white Gaussian noise(AWGN)channels with large frequency deviation and low SNR. 展开更多
关键词 fifth-generation(5g)cell search downlink synchronization cross-correlation detection frequency offset estimation
下载PDF
A Survey on Terahertz Communications 被引量:66
8
作者 Zhi Chen Xinying Ma +6 位作者 Bo Zhang Yaxin Zhang Zhongqian Niu Ningyuan Kuang Wenjie Chen Lingxiang Li Shaoqian Li 《China Communications》 SCIE CSCD 2019年第2期1-35,共35页
With the exponential growth of the data traffic in wireless communication systems, terahertz(THz) frequency band is envisioned as a promising candidate to support ultra-broadband for future beyond fifth generation(5G)... With the exponential growth of the data traffic in wireless communication systems, terahertz(THz) frequency band is envisioned as a promising candidate to support ultra-broadband for future beyond fifth generation(5G), bridging the gap between millimeter wave(mmWave) and optical frequency ranges. The purpose of this paper is to provide a comprehensive literature review on the development towards THz communications and presents some key technologies faced in THz wireless communication systems. Firstly, despite the substantial hardware problems that have to be developed in terms of the THz solid state superheterodyne receiver, high speed THz modulators and THz antennas, the practical THz channel model and the efficient THz beamforming are also described to compensate for the severe path attenuation. Moreover, two different kinds of lab-level THz communication systems are introduced minutely, named a solid state THz communication system and a spatial direct modulation THz communication system, respectively. The solid state THz system converts intermediate frequency(IF) modulated signal to THz frequency while the direct modulation THz system allows the high power THz sources to input for approving the relatively long distance communications. Finally, we discuss several potential application scenarios as well as some vital technical challenges that will be encountered in the future THz communications. 展开更多
关键词 Terahertz(THz)communications beyond fifth generation(5g) SUPERHETERODYNE receiver modulators ANTENNAS channel model BEAMFORMINg technical challenges
下载PDF
Radio Propagation and Wireless Coverage of LSAA-Based 5G Millimeter-Wave Mobile Communication Systems 被引量:12
9
作者 Haiming Wang Peize Zhang +1 位作者 Jing Li Xiaohu You 《China Communications》 SCIE CSCD 2019年第5期1-18,共18页
Millimeter-wave(mm Wave) communications will be used in fifth-generation(5G) mobile communication systems, but they experience severe path loss and have high sensitivity to physical objects, leading to smaller cell ra... Millimeter-wave(mm Wave) communications will be used in fifth-generation(5G) mobile communication systems, but they experience severe path loss and have high sensitivity to physical objects, leading to smaller cell radii and complicated network architectures. A coverage extension scheme using large-scale antenna arrays(LSAAs) has been suggested and theoretically proven to be cost-efficient in combination with ultradense small cell networks. To analyze and optimize the LSAA-based network deployments, a comprehensive survey of recent advances in statistical mmWave channel modeling is first presented in terms of channel parameter estimation, large-scale path loss models, and small-scale cluster models. Next, the measurement and modeling results at two 5G candidate mmWave bands(e.g., 28 GHz and 39 GHz) are reviewed and compared in several outdoor scenarios of interest, where the propagation characteristics make crucial contributions to wireless network designs. Finally, the coverage behaviors of systems employing a large number of antenna arrays are discussed, as well as some implications on future mmWave cellular network designs. 展开更多
关键词 fifth generation (5g) channel modeling large-scale antenna array(LSAA) MILLIMETER wave(mmWave) COMMUNICATIONS RADIO propagation measurements wireless COVERAgE
下载PDF
面向5G非正交多址接入系统的检测算法研究 被引量:6
10
作者 唐万伟 康绍莉 《高技术通讯》 EI CAS 北大核心 2018年第9期813-819,共7页
作为第5代(5G)移动通信系统更新换代的标志性技术——非正交多址接入(NOMA)技术相对于传统的正交技术能够大幅提高频谱效率和提升系统容量。接收机检测技术是非正交多址接入系统性能提高的关键技术,本文基于传统的消息传递算法(MPA)进... 作为第5代(5G)移动通信系统更新换代的标志性技术——非正交多址接入(NOMA)技术相对于传统的正交技术能够大幅提高频谱效率和提升系统容量。接收机检测技术是非正交多址接入系统性能提高的关键技术,本文基于传统的消息传递算法(MPA)进行改进,在MPA算法的基础上加入Turbo译码后的先验信息进行连续迭代运算以进一步提高检测性能,称为MPA-Turbo译码联合迭代算法(MPA-TDJIA)。根据先验信息的加入方式提出4种实现方案,并在链路仿真中对其性能进行评估。仿真结果表明MPA-TDJIA相对于MPA最高可获得1. 67 d B的性能增益。 展开更多
关键词 移动通信 非正交多址接入(NOMA) 消息传递算法(MPA) 迭代检测 5代(5g)
下载PDF
高输出功率高线性度5G毫米波功率放大器研究与设计 被引量:1
11
作者 王喜瑜 刘新阳 +4 位作者 欧阳可青 胡劼 陆敏 陈志林 马宵宵 《中国集成电路》 2023年第3期58-64,共7页
本文针对5G毫米波功率放大器(Power amplifier, PA)高输出功率和高线性度的需求,对PA功率和线性度受限机理进行了深入分析。在此基础上,提出了一种采用峰化电感技术和两路合成结构提升输出功率,以及采用PMOS补偿电容、二阶谐波和低阻抗... 本文针对5G毫米波功率放大器(Power amplifier, PA)高输出功率和高线性度的需求,对PA功率和线性度受限机理进行了深入分析。在此基础上,提出了一种采用峰化电感技术和两路合成结构提升输出功率,以及采用PMOS补偿电容、二阶谐波和低阻抗网络来改善宽带调制下线性度的PA电路。基于5G毫米波26GHz频段应用,该PA采用65nm CMOS SOI工艺进行实现。测试结果表明,该PA在26GHz,实现了20.8dBm的OP1dB和21.3dBm的Psat,峰值PAE为26.15%。在调制信号测试中,使用5G NR 400 MHz 1-CC 64-QAM和256-QAM OFDM信号,该PA支持5%和3%的均方根误差矢量幅度(EVM),和实现平均输出功率(Pavg)分别为15.5dBm和14.4dBm。 展开更多
关键词 毫米波(mmW) 26gHz 第五代(5g) 新型无线电(NR) 功率放大器(PA) 256-QAM 线性度
下载PDF
5G evolution promoting innovation of antenna systems 被引量:1
12
作者 Feng GAO Peng GAO +3 位作者 Wen-tao ZHU Chen-xi ZHANG Xian-kun MENG Run-hong SHAN 《Frontiers of Information Technology & Electronic Engineering》 SCIE EI CSCD 2020年第1期188-194,共7页
We introduce the basic concept,background,and development of mobile communication systems from the first generation(1G)to the fifth generation(5G)including their antenna systems.We also describe the requirements for 5... We introduce the basic concept,background,and development of mobile communication systems from the first generation(1G)to the fifth generation(5G)including their antenna systems.We also describe the requirements for 5G networking and optimization of antenna systems,and present the basic principle of three-dimensional array antennas.Weight optimization methods of massive multiple-input multiple-output(MIMO)antennas are proposed and verified.Finally,several ideas are given to solve the problem of power consumption of 5G antenna systems. 展开更多
关键词 fifth generation(5g) MASSIVE MULTIPLE-INPUT multiple-output(MIMO)antenna array Power CONSUMPTION WEIgHT optimization
原文传递
5G Oriented Exponential Effective Signal to Interference plus Noise Ratio Mapping Algorithm Based on Channel Classification
13
作者 WU Haoran YE Jianfang 《Journal of Donghua University(English Edition)》 EI CAS 2018年第2期160-162,共3页
In the future the fifth generation( 5 G) communication systems,channel models may be very complicated and it is difficult to calculate equivalent signal to interference plus noise ratio( SINR)of a random fading channe... In the future the fifth generation( 5 G) communication systems,channel models may be very complicated and it is difficult to calculate equivalent signal to interference plus noise ratio( SINR)of a random fading channel. Therefore,methods for the calculation of equivalent SINR of a random fading channel are very necessary.In this paper,an enhanced algorithm on the exponential effective SINR mapping( EESM) model for random fading channels was proposed. First, the optimal adjustment parameters of typical channel fading models including extended pedestrian A( EPA)model,extended vehicular A( EVA) model and extended typical urban( ETU) model were obtained by simulation. Then the proposed solution was used to actualize channel classification according to the maximum multipath delay and the average power of the random channel. The solution can determine the typical channel closest to random channel for obtaining the optimal adjustment value of EESM. The evaluation results indicate that the proposed one can improve the whole system throughput significantly and meanwhile the accuracy of the link prediction algorithm is also guaranteed. 展开更多
关键词 the fifth generation (5g) SIgNAL to INTERFERENCE PLUS noiseratio (SINR) EXPONENTIAL EFFECTIVE SINR mapping (EESM) channel classification
下载PDF
用于5G智能手机的高隔离度双频8元MIMO天线
14
作者 姚婷 杨雪霞 黄涛 《电子元件与材料》 CAS 北大核心 2023年第7期880-887,共8页
提出了一种用于第五代移动通信(5G)的8元高隔离度多输入多输出(MIMO)双频手机天线,覆盖3.5 GHz(3.4~3.6 GHz)和4.9 GHz(4.8~5.0 GHz)两个频段。8元MIMO阵列对称放置在手机两个侧边框内表面上,天线单元由倒F型单极子和缝隙耦合环路分支构... 提出了一种用于第五代移动通信(5G)的8元高隔离度多输入多输出(MIMO)双频手机天线,覆盖3.5 GHz(3.4~3.6 GHz)和4.9 GHz(4.8~5.0 GHz)两个频段。8元MIMO阵列对称放置在手机两个侧边框内表面上,天线单元由倒F型单极子和缝隙耦合环路分支构成,其尺寸仅为16.3 mm×5.2 mm(0.18λL×0.06λL,λL为3.4 GHz的自由空间波长)。相邻单元间以11.5 mm(0.13λL)间距紧密排列,通过在单元间增加T型缺陷地结构,提高了MIMO阵列隔离度。对该8元MIMO天线阵列进行实物加工及测试,实测结果表明,在两个工作频段内,天线单元反射系数均小于-6 dB,隔离度分别高于20 dB和15 dB,天线效率均大于50%,包络相关系数(ECC)均小于0.006。 展开更多
关键词 5g MIMO天线 双频 高隔离度 去耦
下载PDF
基于5G技术的无人机侦查系统设计 被引量:4
15
作者 宣润通 杨浩 +1 位作者 刘成 郑泽霖 《价值工程》 2019年第16期158-160,共3页
采用无人机侦查情报具有低成本、零伤亡、低损耗、高机动性和可以重复使用等优势,但传统的图传技术传输速率低、视频质量模糊、传输距离短,大大影响视频传输效果。但随着第五代移动通信技术的发展与普及,基于5G技术的超远程视频传输能... 采用无人机侦查情报具有低成本、零伤亡、低损耗、高机动性和可以重复使用等优势,但传统的图传技术传输速率低、视频质量模糊、传输距离短,大大影响视频传输效果。但随着第五代移动通信技术的发展与普及,基于5G技术的超远程视频传输能够更加便捷稳定高效。本文通过研究5G技术视频数据传输的实现方式,对基于5G技术的无人机侦查系统进行设计和搭建,从而使无人机使用具有更广阔的军事价值。 展开更多
关键词 无人机 第五代移动通信(5g) 无线视频传输 侦查
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部