检索结果-内蒙古大学图书馆

您好，读者！请登录

内蒙古大学图书馆

首页
概况
党建
资源
服务
科研支持
- 论文收录引用证明
- 科技查新
知识产权
档案馆
帮助

咨询与建议

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

您的常用邮箱：*

您的手机号码：*

问题描述：

当前已输入0个字，您还可以输入200个字

全部搜索
期刊论文
图书
学位论文
标准
纸本馆藏
外文资源发现
数据库导航
超星发现

高级检索

时间限定

出版年份：

文献类型

图书期刊文献学位论文多媒体

馆藏选择

电子馆藏纸本馆藏

核心期刊

全部期刊 SCI 收录期刊 SSCI 收录期刊 EI 收录期刊 CSCD 收录期刊 CSSCI 收录期刊

语言

中文英文

文献类型

期刊文献图书学位论文标准纸本馆藏

帮助

文字说明：

T=题名（书名、题名），A=作者（责任者），K=主题词，P=出版物名称，PU=出版社名称，O=机构（作者单位、学位授予单位、专利申请人），L=中图分类号，C=学科分类号，U=全部字段，Y=年（出版发行年、学位年度、标准发布年）

检索规则说明：

AND代表“并且”；OR代表“或者”；NOT代表“不包含”；(注意必须大写,运算符两边需空一格)

检索范例：

范例一：(K=图书馆学 OR K=情报学) AND A=范并思 AND Y=1982-2016
范例二：P=计算机应用与软件 AND (U=C++ OR U=Basic) NOT K=Visual AND Y=2011-2016

分类表

所选分类

>> <<

限定检索结果

文献类型

6,096 篇 会议
1,141 篇 期刊文献

馆藏范围

7,237 篇 电子文献
0 种 纸本馆藏

日期分布

学科分类号

1,778 篇 工学
- 1,238 篇 电气工程
- 895 篇 信息与通信工程
- 267 篇 电子科学与技术（可...
- 214 篇 计算机科学与技术...
- 151 篇 仪器科学与技术
- 92 篇 交通运输工程
- 79 篇 机械工程
- 56 篇 控制科学与工程
- 49 篇 航空宇航科学与技...
- 42 篇 光学工程
- 20 篇 软件工程
- 18 篇 网络空间安全
- 7 篇 生物医学工程（可授...
- 5 篇 核科学与技术
- 4 篇 材料科学与工程（可...
- 4 篇 动力工程及工程热...
- 4 篇 土木工程
- 4 篇 船舶与海洋工程
- 3 篇 化学工程与技术
246 篇 理学
- 158 篇 物理学
- 56 篇 数学
- 24 篇 系统科学
- 3 篇 海洋科学
- 3 篇 统计学（可授理学、...
80 篇 文学
- 80 篇 新闻传播学
58 篇 管理学
- 55 篇 管理科学与工程(可...
- 3 篇 图书情报与档案管...
19 篇 医学
- 19 篇 临床医学
6 篇 军事学
- 6 篇 军队指挥学
3 篇 教育学
- 3 篇 教育学

主题

7,237 篇 modulation codin...
1,467 篇 fading
1,183 篇 decoding
1,064 篇 bandwidth
878 篇 bit error rate
878 篇 convolutional co...
790 篇 pulse modulation
734 篇 multiaccess comm...
676 篇 throughput
557 篇 signal to noise ...
546 篇 iterative decodi...
528 篇 phase modulation
503 篇 transmitting ant...
475 篇 ofdm modulation
466 篇 performance anal...
455 篇 frequency
449 篇 transmitters
446 篇 error correction...
440 篇 interleaved code...
439 篇 awgn

机构

37 篇 school of ecs un...
33 篇 department of el...
29 篇 jet propulsion l...
23 篇 institute for in...
23 篇 school of electr...
23 篇 department of el...
21 篇 department of el...
21 篇 philips research...
21 篇 department of el...
21 篇 department of el...
19 篇 department of el...
19 篇 department of el...
19 篇 department of el...
19 篇 school of inform...
18 篇 school of electr...
17 篇 department of ec...
15 篇 department of el...
15 篇 department of el...
14 篇 school of engine...
14 篇 qualcomm inc.orp...

作者

68 篇 l. hanzo
25 篇 s.x. ng
22 篇 e. biglieri
21 篇 d. divsalar
21 篇 xiang-gen xia
19 篇 t. ohtsuki
18 篇 m. sawahashi
18 篇 m.p. fitz
17 篇 i. sasase
17 篇 r. schober
17 篇 j.b. anderson
17 篇 dongfeng yuan
16 篇 j.m. cioffi
14 篇 s. x. ng
13 篇 g. caire
13 篇 dong-feng yuan
13 篇 biglieri e
13 篇 a. ghosh
13 篇 xin wang
13 篇 lajos hanzo

语言

7,070 篇 英文
110 篇 其他
56 篇 中文
1 篇 俄文

检索条件"主题词=Modulation Coding"

共 7237 条记录，以下是471-480 订阅

全选清除本页清除全部题录导出标记到"检索档案"

详细简洁

排序：

Fast Optimal Resource Allocation for Scalable Video Multicast in Broadband Wireless Networks

Fast Optimal Resource Allocation for Scalable Video Multicas...

引用

IEEE International Conference on Communications (ICC)

作者： P. Li H. Zhang B. Zhao S. Rangarajan Department of Computer Science and Technology University of Science and Technology Hefei Anhui China NEC Laboratories of America Inc. Princeton NJ USA State Key Laboratory of Networking and Switching Technology Beijing China

Scalable video coding (SVC) and Adaptive modulation and coding (AMC) are two key techniques for video multicast in broadband wireless networks. They can improve the system performance by enhancing the wireless resource allocation schemes and assigning appropriate modulation and coding schemes (MCS) to different layers of scalable video sequences. We formulate the problem as maximizing the total system utility subject to the total resource constraint, where the utility of each user is a generic non-negative, non-decreasing function of received rate. We then propose a fast intra-session MCS assignment algorithm based on dynamic programming. This algorithm can be integrated with an existing inter-session resource allocation algorithm and applied to multi-session scenarios. Simulation results show that our algorithm achieves significant improvement on the video quality over a naive algorithm and an adapted greedy algorithm, and greatly reduces the running time in both single-session and multi-session scenarios compared to a former optimal algorithm.

关键词： Resource management Wireless networks modulation coding Video coding Static VAr compensators System performance Video sequences Heuristic algorithms Dynamic programming Greedy algorithms

来源：评论

学校读者我要写书评

暂无评论

BICM Transmission Using Non-Uniform QAM Constellations: Performance Analysis and Design

BICM Transmission Using Non-Uniform QAM Constellations: Perf...

引用

IEEE International Conference on Communications (ICC)

作者： J. Hossain A. Alvarado L. Szczecinski INRS-EMT University of Quebec Montreal Canada Department of Signals and Systems Communication Systems Group Chalmers University of Technology Gothenburg Sweden

In this paper we study bit-interleaved coded modulation (BICM) transmission using non-uniform (NU) quadrature amplitude modulation (QAM) constellations. For such a NUQAM-BICM transmission, we develop closed-form approximations for the probability density function of the L-values, and we use them to predict the coded bit error rate (BER)performance of the system in the AWGN channel. We then numerically optimize NU-QAM-BICM based on convolutional codes. Compared to uniform QAM-based BICM transmission, and for a target BER of 10 -7 , we reach gains up to 1 dB. When the design is applied to turbo codes a decrease in the error floor can be obtained.

关键词： Quadrature amplitude modulation Performance analysis Bit error rate Interleaved codes Amplitude modulation modulation coding Probability density function AWGN channels Convolutional codes Turbo codes

来源：评论

学校读者我要写书评

暂无评论

Review of PSK and QAM — Digital modulation techniques on FPGA

Review of PSK and QAM — Digital modulation techniques on FP...

引用

International Conference on Computational Cybernetics (ICCC)

作者： S. O. Popescu G. Budura A. S. Gontean Applied Electronics Department University Politechnica of Timisoara Timisoara Romania Telecommunications Department University Politechnica of Timisoara Timisoara Romania

ISBN: (纸本)9781424474325;9781424474332

This paper presents an overview of the PSK and QAM modulations, two digital modulation techniques. Based on recent development of software tools and FPGA circuits, the present paper improves a solution for implementing the PSK demodulation technique on a Virtex 5 board. The design of a BPSK detector, all digital, implemented on the FPGA is also considered.

关键词： Phase shift keying Quadrature amplitude modulation Digital modulation Field programmable gate arrays modulation coding Binary phase shift keying Demodulation Phase modulation Signal processing Detectors

来源：评论

学校读者我要写书评

暂无评论

Research on the energy consumption of V-MIMO-OFDM system underground coal mines

Research on the energy consumption of V-MIMO-OFDM system und...

引用

International Conference on Control and Automation (ICCA)

作者： Jin-ling Song Yu-jun Song Heng-wei Gao School of Information & Electrical engineering China University of Mining & Technology Xuzhou221008 China

In order to make sure that the Wireless Sensor Networks can transmit signals efficiently and reliably in uneven, heterogeneous and limited space, the V-MIMO-OFDM mode is used underground coal mines. It allows the nodes equipped with single antenna to process information and transmit collaboratively, so multi-path fading can be resisted efficiently. The energy consumption of SISO, V-MIMO and V-MIMO-OFDM system is studied in this paper. It can be seen from the energy consumption curve that the V-MIMO system can reduce the energy consumption. In a short communication distance, the energy consumption of the V-MIMO system is more than the SISO. But over a certain distance, it is quite the opposite. The V-MIMO-OFDM system further shortens the communication distance. Therefore, the adoption of V-MIMO-OFDM system underground coal mines can greatly reduce the bit error rate and energy consumption. energy consumption.

关键词： Energy consumption Bit error rate Quadrature phase shift keying OFDM modulation Collaboration MIMO modulation coding Wireless sensor networks Transmitting antennas Fading

来源：评论

学校读者我要写书评

暂无评论

166 Gb/s PDM-NRZ-DPSK modulation using thin-LiNb03-substrate modulator

166 Gb/s PDM-NRZ-DPSK modulation using thin-LiNb03-substrate...

引用

Optical Fiber Communication (OFC) Conference

作者： Atsushi Kanno Takahide Sakamoto Akito Chiba Tetsuya Kawanishi Kaoru Higuma Masaaki Sudo Junichiro Ichikawa National Institute of Information and Communications Technology Koganei Tokyo Japan New Technology Research Laboratories Sumitomo Osaka Cement Company Limited Funabashi Chiba Japan

The modulation of a 166-Gb/s PDM-NRZ-DPSK signal is demonstrated using a thin-LiNbO 3 -substrate modulator. The use of a 0.1-mm-thick substrate and a ridge-type waveguide improves the optical response and brings about... 详细信息

关键词： High speed optical techniques Optical modulation Wavelength division multiplexing Optical waveguides Frequency response Electrodes Bandwidth Propagation losses Phase modulation modulation coding

来源：评论

学校读者我要写书评

暂无评论

Parameterized EXIT function for demapper and symbol mapping design

Parameterized EXIT function for demapper and symbol mapping ...

引用

International Symposium on Wireless Pervasive Computing (ISWPC)

作者： Duc To Jinho Choi School of Engineering Swansea University Swansea UK

ISBN: (纸本)9781424468553;9781424468584

We propose an approach using the parameterization of extrinsic information transfer (EXIT) functions for symbol mapping design in bit-interleaved coded modulation (BICM-ID). The EXIT function of demapper is parameterized by a weighed sum of binomial functions. The set of binomial functions is then transformed to an orthonormal basis. Based on the parametric approach, the flatness criterion, aiming at achieving a faster convergence rate in term of number of iterations, can be formulated and symbol mappings can be found by a searching method. Simulation results confirm that good performances can be achieved in terms of convergence rate for fast fading channels when a good (near capacity-achieving) code is employed.

关键词： modulation coding Iterative decoding Convergence Fading Curve fitting Interleaved codes Signal mapping Pervasive computing Design engineering Digital modulation

来源：评论

学校读者我要写书评

暂无评论

FSK/PSK Modulated Coded Cooperation Systems

FSK/PSK Modulated Coded Cooperation Systems

引用

International Conference on Communication Theory, Reliability, and Quality of Service, CTRQ

作者： Deniz Çelik İbrahim Altunbaş Ü Aygölü Alcatel-Lucent Teletaş Y.Dudullu İstanbul Türkiye Istanbul Technical University Faculty of Electrical and Electronics Engineering Istanbul Türkiye

In this paper, coded user cooperation systems are integrated with combined frequency and phase modulation. Frequency/phase shift keying modulation defined over a signal set varying in both frequency and phase is a nonlinear constant envelope multidimensional modulation technique. Error performance of the proposed scheme is evaluated by computer simulations in quasi-static Rayleigh fading channels, for both full and selective cooperation cases. The selective cooperation is performed first by cyclic redundant check code control and then by threshold signal-to-noise control. Simulation results show that in all cases, frequency/phase shift keying modulation provides much better error performance than the conventional phase shift keying modulation in coded cooperation systems.

关键词： Frequency shift keying Phase shift keying modulation coding Phase modulation Fading Computer errors Diversity methods Mobile communication Bandwidth Decoding

来源：评论

学校读者我要写书评

暂无评论

Repetitive Fixed Bandwidth Limitation and QAM Correction for EER Power Amplifier

Repetitive Fixed Bandwidth Limitation and QAM Correction for...

引用

IEEE Conference on Wireless Communications and Networking

作者： Abdul K. Mustafa Michael Faulkner Centre for Telecommunication and Microelectronics Victoria University Australia

Envelope elimination and restoration (EER) power amplifier architecture can achieve high efficiency and linearity. However, when used with modern modulation schemes such as orthogonal frequency division multiplexing (OFDM) and wideband code division multiple access (W-CDMA), it suffers from expanded bandwidth problem. This paper shows that, the straightforward bandwidth limitation results in poor efficiency of the power amplifier (PA). We propose a new repetitive bandwidth limitation technique which reduces bandwidth expansion of both the envelope and phase polar drive signals without compromising the efficiency of the PA. It has been found that the improvement in bandwidth of drive signals is proportional to the number of repetition. The bandwidth limitation often results in spectral splatter and error vector magnitude (EVM). To counter this, we employ a QAM correction technique which reduces the in band distortion.

关键词： Bandwidth Quadrature amplitude modulation Power amplifiers Broadband amplifiers Multiaccess communication High power amplifiers Linearity modulation coding OFDM modulation Wideband

来源：评论

学校读者我要写书评

暂无评论

RF class-S power amplifiers: State-of-the-art results and potential

RF class-S power amplifiers: State-of-the-art results and po...

引用

Microwave, MTT-S International Symposium

作者： A. Wentzel C. Meliani W. Heinrich Ferdinand-Braun-Institut (FBH) Leibniz-Institut fuer Hoechstfrequenztechnik Berlin Germany

This paper reports recent results on a current-mode class-S power amplifier for the 450 MHz band, based on GaN-HEMT MMICs. We achieve a peak output power of 8.7 W for a single tone at 420 MHz, encoded in standard band-pass delta-sigma modulation with 1.68 Gbps sampling frequency. The respective efficiency is 34%. We find that these values strongly vary with coding efficiency of the modulation and reach 19 W with 59% for square-wave excitation. In order to clarify the potential of the PA in more detail, the S-class characteristics at power back-off and with varying oversampling ratio are presented as well.

关键词： Radio frequency Power amplifiers Radiofrequency amplifiers Semiconductor optical amplifiers Linearity MMICs Power generation Delta-sigma modulation Sampling methods modulation coding

来源：评论

学校读者我要写书评

暂无评论

Finding MIMO

Finding MIMO

引用

International Symposium on Wireless Pervasive Computing (ISWPC)

作者： Dragos Niculescu ETTI Universitatea Politehnica din Bucuresti Romania

ISBN: (纸本)9781424468553;9781424468584

Availability of multiple antennas enables increased capacity or increased resilience for modern radios. This advantage depends on the deployment of the antennas at the sender and receiver. But there is a performance gap between most simulated results and the actual performance obtained in practice. This is due to the rank of the channel obtained in deployments, which depends on local propagation conditions, and on the placement of the senders and receivers. Using implementation on top of USRP platform, and mobile antennas, we show that it is possible to find 'good' antenna positions within a search space of a few carrier wavelengths. This opens the possibility for adaptive methods in antenna position and coding/modulation techniques to feed back to each other to reduce the gap between theoretical and practical MIMO performance.

关键词： MIMO Antennas and propagation Mobile antennas Availability Resilience Receiving antennas Adaptive arrays Antenna feeds Antenna theory modulation coding

来源：评论

学校读者我要写书评

暂无评论

没有更多数据了...

全选清除本页清除全部题录导出标记到“检索档案”

共500页 << < 44 45 46 47 48 49 50 51 52 53 > >>

检索报告对象比较合并检索0

隐藏清空

合并搜索

回到顶部

执行限定条件

内容：

评分：

请选择保存的检索档案：

请选择收藏分类：

订阅名称：

通借通还

温馨提示：

图书名称：

借书校区：

取书校区：

手机号码：

邮箱地址：

一卡通帐号：

电话和邮箱必须正确填写，我们会与您联系确认。

联系人：

所在院系：

联系邮箱：

联系电话：

内蒙古自治区呼和浩特市赛罕区大学西街235号邮编: 010021

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

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：