检索结果-南通市图书馆

Non-Overlapping Conditions to Enable Multi- Dimensional Behavioral Models/DPDs for Multi-Band or Non-Continuous carrier aggregation Systems

引用

China Communications 2017年第2期14卷 30-39页

作者： Cuiping Yu Ziyuan Zhang Beijing Key Laboratory of Work Safety Intelligent Monitoring Beijing 100876 China School of Electronic Engineering Beijing University of Posts and Telecommunications Beijing 100876 China

To linearize the *** PAs/transmitters, a serial of *** predistortion models based on *** architecture have been proposed. However, most of these models work properly only for the signals whose harmonic and intermodulation products of carriers' *** with the interested fundamental bands. In this paper, the *** conditions for *** and *** signals are derived and denoted in the form of *** expression. It can be used to verify whether a given ***/*** signals can be linearized properly by these *** behavioral models. Also the conditions can be used to plan the frequency spacing and maximum bandwidth of a *** or *** carrier aggregation signal. Several *** and triband signals were tested on the same PA, by employing 2.D DPD and 3.D DPD behavioral models. The measurement results show that the signals which don't satisfy the *** conditions cannot be linearized well by the *** behavioral models which does not take the harmonic and intermodulation products of carriers' into account.

关键词： predistortion multiband power amplifiers behavioral model carrier aggregation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Delay analysis of DRX in LTE-advanced considering carrier aggregation

引用

The Journal of China Universities of Posts and Telecommunications 2011年第6期18卷 1-7页

作者： ZHANG Yi-fan GAO Song-tao TIAN Hui HUANG Bo Key Laboratory of Universal Wireless Communications Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 China

The long term evolution advanced （LTE-advanced） standards target at high system performance comparable or superior to the requirements of the International mobile telecommunications advanced （IMT-advanced）. In order to support backward compatibility with LTE, most of the key technologies have been retained in LTE-advanced, one of which is the discontinuous reception mechanism （DRX）. LTE-advanced adopts carrier aggregation technology to extend the system bandwidth, which requires the LTE DRX applied in single-transceiver scenario to be adapted to multi-transceiver scenario with multiple component carriers. Apparently, carrier aggregation will influence the performance of DRX severely, so it＇s worth studying the impact brought by the coexistence ofLTE DRX and carrier aggregation on the system performance, e.g., the system delay. In this paper, first an overview of DRX in carrier aggregation scenario is given. Then it is modeled as a Markov process based on the queuing theory. Simulation results show that the independent component carrier configuration with a uniform Inactivity Timer achieves a superior service delay performance compared with other reference schemes.

关键词： LTE-advanced DRX carrier aggregation component carrier

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Analysis and Application of carrier aggregation Technology in Wireless Communications

Analysis and Application of Carrier Aggregation Technology i...

引用

2012 National Conference on Information Technology and Computer Science

作者： Binglin Li China Electric Power Research Institute Nanjing Jiangsu,211106 Hao Zhang China Electric Power Research Institute Nanjing Jiangsu,211106 Jiming Yao China Electric Power Research Institute Nanjing Jiangsu,211106 Hongbin Yao North China Grid Company Limited,Beijing,10053

carrier aggregation is a key technology in the *** aggregation can be achieved within the same frequency bands continuous carrier aggregate,non-continuous carrier aggregation and different frequency bands within the carrier *** analyses the two implementations of carrier aggregation:MAC layer aggregation and physical layer *** with demand for power applications,the carrier aggregation HARQ hybrid scheduling control policy is applied,then proposes subcarrier allocation method of the 230MHz *** can realize the 230MHz frequency band wireless communication system by using carrier aggregation and spectrum-sensing *** then completed functional testing in *** validates that the system does not affect the original 230MHz radio at work.

关键词： LTE-A carrier aggregation spectrum sensing 230MHz frequency smart grid

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Optimal power allocation for homogeneous and heterogeneous CA-MIMO systems

引用

Science China(Information Sciences) 2013年第2期56卷 177-190页

作者： CUI QiMei KANG PeiChuan HUANG XueQing VALKAMA Mikko NIEMELA Jarno Key Laboratory of Universal Wireless Communications Beijing University of Posts and Telecommunications Department of Communications Engineering Tampere University of Technology

carrier aggregation (CA) technique has been adopted by 3GPP LTE-Advanced due to its ability of enhancing the spectrum efficiency and peak data rates through aggregating multiple component carriers (CCs). Two main factors make power control optimization very essential for CA-MIMO radio link: the different channel characteristics in multiple CCs, and multiple power constraint conditions (per-CC, per-antenna and pertransmitter power constraints) in the actual CA system deployment. This paper firstly derives the degenerate conditions of optimal power allocation for a single-transmitter CA-MIMO system. Stemming from the derived degenerate conditions, we propose a modified hybrid gradient optimal power allocation(MHGOPA) algorithm to maximize the system performance. Simulation results verify the validity of the proposed resource allocation approach by comparing with baseline average power allocation algorithm. Finally, we extend the MHGOPA algorithm into a heterogeneous CA network with multiple transmitters working simultaneously.

关键词： LTE-advanced carrier aggregation CA-MIMO heterogenous network modified hybrid gradient optimal power allocation

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Cross-Tier Interference Mitigation in 3D HetNets for LTE and Wi-Fi Access

引用

Intelligent Automation & Soft Computing 2023年第1期35卷 1211-1227页

作者： M.Rekha M.Bhuvaneswari Department of Electronics and Communication Engineering Dhanalakshmi Srinivasan Engineering College(Autonomous)Perambalur621212Tamil NaduIndia Department of Electronics and Communication Engineering Anna University BIT campusTiruchirappalli620024Tamil NaduIndia

Due to the unprecedented rate of transformation in thefield of wireless communication industry,there is a need to prioritise the coverage,network power and throughput as *** Heterogeneous Networks(HetNets)the low power node inclusion like Femto and Pico cells creates a network of Multi-Tier(M-Tier)which is regarded as the most significant strategy for enhancing the coverage,throughput,4G Long Term Evolution(LTE)*** work mainly focuses on M-Tier 3D Heterogeneous Networks Energy Efficiency(EE)based carrier aggregation(CA)scheme for streaming real-time huge data like ***,M-Tier 3D HetNets scheme was made for investigating Signal to Noise Interference Ratio(SNIR)on assessing the collective Pico-tier and Femto-tier ***,the scheme of channel allocation is scrutinised so as to esti-mate throughput from the multiple ***,with the use of CA technique,the problem of energy efficiency for M-Tier 3D Heterogeneous Network(HetNet)in relation to energy metrics and throughput was evaluated with the use of LTE and Wireless Fidelity(Wi-Fi)*** simulation is carried out in a MATLAB setting,and the outcomes reveal a huge impact on *** simulation is carried in terms of EE,transmission time,throughput,packet success rate,convergence probability,and coverage *** analysis from simu-lation shows that on improving the output of the device,interference among small cell base stations is reduced on increasing *** outcomes attained aid in the effective creation of M-Tier 3D HetNets for enhancing EE by employing Multi-Stream carrier aggregation(MSCA)in HetNets.

关键词： Heterogeneous networks multi-tier 3D HetNets energy efficiency carrier aggregation LTE Wi-Fi

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A Resource Allocation Scheme with Delay Optimization Considering mmWave Wireless Networks

引用

International Journal of Communications, Network and System Sciences 2020年第7期13卷 105-119页

作者： Marcus V. G. Ferreira Flávio H. T. Vieira Marcos N. L. Carvalho Instituto de Informática Universidade Federal de Goiás Goiania Goiás Brasil Escola de Engenharia Elétrica Mecanica e de Computa&#231 o Universidade Federal de Goiás Goiania Goiás Brasil

This paper presents a resource allocation scheme for wireless networks, aiming at optimizing the users’ data delay. It is proposed to provide optimal delay al-location by solving an optimization problem using idle state prediction and considering 5G characteristics such as mmWave propagation. The perfor-mance of the resource allocation algorithm is verified and compared with oth-ers from the literature using computational simulations in terms of Quality of Service (QoS) parameters such as throughput, delay, fairness index, loss rate and computational complexity. In these simulations, it is also considered the mmWave propagation and carrier aggregation technology for wireless next generation systems, in order to verify the system performance in a high data rate scenario.

关键词： Delay QoS mmWave carrier aggregation 5G

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：