Description: After the successful global introduction during the past decade of the second generation (2G) digital
mobile communications systems, it seems that the third generation (3G) Universal Mobile Communication
System (UMTS) has finally taken off, at least in some regions. The plethora of new services that
are expected to be offered by this system requires the development of new paradigms in the way scarce
radio resources should be managed. The Quality of Service (QoS) concept, which introduces in a natural
way the service differentiation and the possibility of adapting the resource consumption to the specific
service requirements, will open the door for the provision of advanced wireless services to the mass
market. Platform: |
Size: 3812352 |
Author:林伟勋 |
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Description: 斯坦福大学的John M. Cioffi的讲义和相关程序。程序主要是关于RA和MA的注水功率算法。-John M. Cioffi s PPT and related programs.(AdvancedDigitalCommunication) Platform: |
Size: 7510016 |
Author:姜雪梅 |
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Description: Digital communication ebook and its solution, the final several chapters talking about the advanced techniques which are suitable for developers. Platform: |
Size: 25823232 |
Author:minuscat |
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Description: Learn about Ultra-wideband (UWB) transmission - the most talked about application in wireless communications. UWB wireless communication is a revolutionary technology for transmitting large amounts of digital data over a wide spectrum of frequency bands with very low power for a short distance. This exciting new text covers the fundamental aspects of UWB wireless communications systems for short-range communications. It also focuses on more advanced information about networks and applications. Chapters include: Radio Propagation and Large Scale Variations, Pulse Propagation and Channel Modelling, MIMO (Multiple Input, Multiple Output) RF Subsystems and Ad Hoc Networks. Platform: |
Size: 5261312 |
Author:kinomira |
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Description: 本论文在简要阐述了各种光纤数字传输系统技术及其原理的基础上，通过比选确定出了符合钦州至崇左路段的较先进的光纤数字传输系统方案，确定其光纤通信系统采用SDH传输方案。在SDH传送网分层模型的基础上，对SDH传送网各层功能、信号流程、网络配置作了详细的阐述，同时说明了SDH传送网特有的复用映射原理。根据钦州至崇左路段的实际情况计算确定了系统中的重要参数，选择出了网络拓扑结构，按最坏值设计法进行了中继段长度的计算，编制了网络组织图、通道组织图及通信系统总体框图等。所设计的的高速公路光纤数字传输系统达到了能够同时传输语音、数据及图像的要求，并且满足了容量要求，实现了与相邻高速公路通信系统的相互连接。-The article,through compared to elects to determine,has conformed to Qinzhou to the Chongzuo road section ,which advanced optical fiber digital transmission system plan, had determined the optical fiber communications system using the SDH transmission plan in the principle foundation.In the SDH transmission network model foundation, each function of SDH transmission network,the signal flow simultaneously explained the SDH transmission network which uniqued multiplying mapping inciple.The computation had determined the system important parameter,had carried the worst value design law,the channel drafted pattern and the communications system overall diagram and so on. The highway optical fiber digital transmission system, hadbeen designed had achieved simultaneously transmiting the pronunciation on,the data and the image requestion has satisfied the capacity which has realized neighboring highway communications system mutual connection.
Keywords： Expressway communication system O Platform: |
Size: 851968 |
Author:lsj |
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Description: 数字信号处理 高级数字通信系统仿真 包括编码，传输，解码以及最后误码率的计算-Digital signal processing, including advanced digital communication system simulation code, transmission, decoding and the calculation of the final error rate Platform: |
Size: 9216 |
Author:pipi |
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Description: 人类有几千年的历史，计算机从产生到现在只不过50多年，而网络的迅速发展也不过10年的时间。但是，计算机和网络对社会的影响已经迅速扩大，甚至在改变人们的生活。特别是90年代以来，多媒体和网络技术的飞速发展正在以惊人的速度改变着人们的工作方式、交往方式和生活方式。正像著名的未来学家尼葛洛庞帝（1997）所说的：“数字不再只和计算有关，它决定我们的生存。”科学技术是第一生产力，是最先进的生产力。现在,已经没有人怀疑信息技术的发展将会引起人类社会全面和深刻的变革，使人类社会由工业社会迈向信息社会。目前，在社会各个方面都呈现出了与工业社会显著不同的特点。网上书店，网上医院，网上学校，网上购物，网上银行，政府上网等新事物如雨后春笋般涌现出来，对人们的传统生活方式、工作方式产生极大的冲击。使人们感受到技术发展的脉搏和信息时代前进的步伐。-There are thousands of years of human history, from creation to the computer but now 50 years, the rapid development of the network but also 10 years. However, the computer and network impact on society has been rapidly expanding, even in changing people s lives. Especially since the 90 s, multimedia and the rapid development of network technology is changing at an alarming rate the way people work, communication and lifestyle. As the famous futurist Nicholas Negroponte (1997) said: "Digital is no longer the only and calculated, which determines our survival." Science and technology are primary productive forces, is the most advanced productive forces. Now, no one doubts the development of information technology, human society will lead to a comprehensive and profound changes, the human society from industrial society into the information society. At present, the social aspects of industrial society emerged with significantly different characteristics. Online bookstore, online hospital Platform: |
Size: 717824 |
Author:xzc |
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Description: 提出在分布式电能质量监测仪中采用数字信号处理器( DSP) 的主机接口( HPI) 实现双CPU
间的通信。整个电能质量监测系统采用高级精简指令集计算机( ARM, 型号S3C2410X) 和DSP
( 型号T MS320C6713) 双CPU 结构的总体设计方案。文中给出了HPI 的硬件连接图, 介绍了在
WinCE 操作系统中编写HPI 驱动程序的要点, 给出了监测仪使用的HPI 驱动程序的接口函数
HPI_Init 的流程图, 以及驱动程序对S3C2410X 相关寄存器的设置, 最后介绍了影响H PI 通信速
度的因素和监测仪所采用的HPI 通信规范-Proposed distributed power quality monitoring instrument used in digital signal processor (DSP) of the host interface (HPI) to achieve dual-CPU communication between. The power quality monitoring system, using advanced reduced instruction set computer (ARM, model S3C2410X) and DSP (Model T MS320C6713) dual CPU structure of the overall design. The paper gives the HPI hardware connection diagram, introduced in the WinCE operating system to write the main points of HPI drivers, given the monitor using the HPI driver interface functions HPI_Init flow chart, and the driver on the relevant register S3C2410X settings, and finally describes the impact of H PI communications and monitor the speed of the factors used by the HPI communication norms Platform: |
Size: 710656 |
Author:ywj |
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Description: this document serves a good introduction to digital communication transmission and gives a comprehensive theory of modulation schemes. it is good for beginners of communication and is brush up for advanced learners. a great document.-this document serves as a good introduction to digital communication transmission and gives a comprehensive theory of modulation schemes. it is good for beginners of communication and is brush up for advanced learners. a great document. Platform: |
Size: 24576 |
Author:nir |
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Description: this document serves a good introduction to digital communication transmission and gives a comprehensive theory of modulation schemes. it is good for beginners of communication and is brush up for advanced learners. a great document.-this document serves as a good introduction to digital communication transmission and gives a comprehensive theory of modulation schemes. it is good for beginners of communication and is brush up for advanced learners. a great document. Platform: |
Size: 30720 |
Author:nir |
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Description: 本文主要是JTIDS的传输性能做了仔细的评估，并对其抗干扰做了一一的介绍。-The Joint Tactical Information Distribution System (JTIDS) provides jam-resistant digital communication of data and voice for command and control, relative positioning and identification. Many advanced technologies are adopted in JTIDS, such as frequency hopping, M-ary spread spectrum, error detection and
correction. Platform: |
Size: 1899520 |
Author:严鹏涛 |
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Description: MIMO是近年来数字通信领域重大的技术突破之一，它对提高无线通信系统的频谱利用率和信道容量有显著作用目前MIMO技术是正属于热门研究的3GPP LTE advanced的核心技术之一。
-MIMO is one of the major technological breakthrough in the field of digital communications in recent years, it is to improve the spectral efficiency of a wireless communication system have a significant effect and the channel capacity of MIMO technology is currently belong to one of the core technologies of the 3GPP LTE advanced. Platform: |
Size: 143360 |
Author:qiqi |
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Description: MIMO-OFDM is a key technology for next-generation cellular communications (3GPP-LTE,
Mobile WiMAX, IMT-Advanced) as well as wireless LAN (IEEE 802.11a, IEEE 802.11n),
wireless PAN (MB-OFDM), and broadcasting (DAB, DVB, DMB). This book provides a
comprehensive introduction to the basic theory and practice of wireless channel modeling,
OFDM, and MIMO, with MATLAB programs to simulate the underlying techniques on
MIMO-OFDM systems. This book is primarily designed for engineers and researchers who are
interested in learning various MIMO-OFDM techniques and applying them to wireless
communications. It can also be used as a textbook for graduate courses or senior-level
undergraduate courses on advanced digital communications. The readers are assumed to have
a basic knowledge on digital communications, digital signal processing, communication
theory, signals and systems, as well as probability and random processes. Platform: |
Size: 11264000 |
Author:Robin |
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Description: MIMO-OFDM is a key technology for next-generation cellular communications (3GPP-LTE,
Mobile WiMAX, IMT-Advanced) as well as wireless LAN (IEEE 802.11a, IEEE 802.11n),
wireless PAN (MB-OFDM), and broadcasting (DAB, DVB, DMB). This book provides a
comprehensive introduction to the basic theory and practice of wireless channel modeling,
OFDM, and MIMO, with MATLAB programs to simulate the underlying techniques on
MIMO-OFDM systems. This book is primarily designed for engineers and researchers who are
interested in learning various MIMO-OFDM techniques and applying them to wireless
communications. It can also be used as a textbook for graduate courses or senior-level
undergraduate courses on advanced digital communications. The readers are assumed to have
a basic knowledge on digital communications, digital signal processing, communication
theory, signals and systems, as well as probability and random processes. Platform: |
Size: 5013504 |
Author:werad |
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