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介绍超宽带(UWB)无线通信技术的概念及其基本工作原理,包括信号特性、多址方式、收发机结构及UWB无线标准等,并介绍UWB应用于宽带同轴电缆,特别是CATV/HFCS中的技术. 相似文献
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值得关注的一种新兴近距离无线通信技术——超宽带UWB 总被引:2,自引:0,他引:2
文章从超宽带UWB技术概述入手,介绍了UWB和UWB标准化的发展进程,着重列出了MB-OFDM-UWB技术特点,最后展望了UWB技术的应用与前景。 相似文献
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UWB技术是目前最理想的低功耗、高带宽的短距离无线传输技术。UWB技术的相关研究以及应用也成了目前研究的热点话题。介绍了UWB的基本技术及相关知识,包括其定义、技术实现、相关调制技术及优缺点。并将UWB与其他几种技术做简单比较,突现了UWB在高速率传输、低功率发射、低功耗、大空间容量等多方面的优势。最后,介绍了UWB在数字家庭及无绳USB方面的应用。 相似文献
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介绍超宽带(UWB)无线通信技术的概念及其基本工作原理,包括信号特性、多址方式、收发机结构及UWB无线标准等,并介绍UWB应用于宽带同轴电缆,特别是CATV/HFCS中的技术. 相似文献
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UWB-新型宽带无线接入技术 总被引:2,自引:0,他引:2
本文主要介绍了超宽带(UWB)无线通信技术的起源、概念及其基本工作原理,并总结了UWB的性能特点,对UWB的局限性也作了简单的介绍。 相似文献
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超宽带无线通信技术(2) 总被引:3,自引:0,他引:3
超宽带(UWB)信道的传播特征与传统的窄带信道有显著的差异,UWB系统发送方案和接收机设计需要根据信道特征进行优化.本期讲述UWB信道特征、系统方案及接收机关键技术;上一期介绍了UWB的产生与发展、技术特点、信号成形及调制与多址技术;下一期将介绍UWB的应用前景和标准化情况. 相似文献
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无线通信新技术——超宽带(UWB)技术及发展趋势 总被引:1,自引:0,他引:1
文章介绍了超宽带技术的定义、特点及现状,阐述了UWB的信号特征、调制/解调方法、发射机组成框图、接收机组成框图及UWB信号的抗多径传播特性,指出了UWB信号对现有的无线通信系统造成的影响,说明了对UWB系统发射功率的限制要求,最后给出了UWB技术的应用情况及其发展趋势。 相似文献
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Short-Range Wireless Communications for Next-Generation Networks: UWB, 60 GHz Millimeter-Wave WPAN, And ZigBee 总被引:4,自引:0,他引:4
This article presents standardization, regulation, and development issues associated with short-range wireless technologies for next-generation personal area networks (PAN). Ultra-wideband (UWB) and 60 GHz millimeter-wave communication technologies promise unprecedented short-range broadband wireless communication and are the harbingers of multigigabit wireless networks. Despite the huge potential for PAN, standardization and global spectrum regulations challenge the success of UWB. On the other hand, ZigBeetrade is expected to be a crucial short-range technology for low throughput and ultra low-power consumption networks. The current status and direction of future development of UWB, emerging 60 GHz millimeter-wave PAN, and low data rate ZigBee are described. This article also addresses wireless MAC protocol issues of 60 GHz multigigabit PAN. 相似文献
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A dual-antenna phase-array ultra-wideband CMOS transceiver 总被引:1,自引:0,他引:1
Sever I. Lo S. Ssu-Pin Ma Jang P. Zou A. Arnott C. Ghatak K. Schwartz A. Lam Huynh Nguyen T. 《Communications Magazine, IEEE》2006,44(8):102-110
Ultra-wideband (UWB) systems use high-bandwidth signals to enable a new generation of ultra-high-data-rate wireless applications. Implementation of a high-bandwidth RF system in the 3-5 GHz band presents challenges that can be solved by circuit and system techniques. This article looks at the motivation and requirements for a WiMedia-compliant UWB system implemented for a target application in wireless video transmission. It explores the circuit-level trade-offs in CMOS radio and some of the system-level methods, such as selection diversity and equal-gain combining, used to increase robustness in multipath and interference environments. The radio (S. Lo, 2006) is part of a two-chip solution that includes a digital baseband chip that implements the WiMedia-compliant PHY and MAC. The measured results of the 0.18 /spl mu/m CMOS UWB transceiver demonstrate the efficacy of these techniques in the final RF and system performance. 相似文献
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Time-Reversed Ultra-wideband (UWB) Multiple Input Multiple Output (MIMO) Based on Measured Spatial Channels 总被引:1,自引:0,他引:1
《Vehicular Technology, IEEE Transactions on》2009,58(6):2884-2898
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超宽带脉冲信号的光学生成方法研究 总被引:1,自引:0,他引:1
近年来超宽带(UWB)通信技术迅猛发展,在测量、雷达技术、民用和军事无线通信中有着重要的应用,UWB-over-fiber技术已经成为目前研究的热点,其中就包括UWB脉冲信号的产生方法。区别于传统的电子学方法,光子学产生方法不受电子瓶颈制约,可以实现很高的带宽,并且具有抗电磁干扰、重量轻、结构紧凑的优点。通过对比国内外本领域研究成果,讨论及总结了以下三种原理的UWB脉冲信号的光学生成方法:1)相位调制-强度调制转换(PM-IM);2)半导体光放大器(SOA)的非线性效应;3)频谱塑形和色散所致频域-时域映射,然后对各种方案进行了对比分析。 相似文献
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Medium access control in ultra-wideband wireless networks 总被引:7,自引:0,他引:7
Xuemin Shen Weihua Zhuang Hai Jiang Jun Cai 《Vehicular Technology, IEEE Transactions on》2005,54(5):1663-1677
Ultra-wideband (UWB) transmission is an emerging wireless communication technology with unique potential merits such as high-rate, low-transmission power, immunity to multipath propagation, and capability in precise positioning. It has received significant interests for future wireless communications from both academia and industry. In UWB wireless networks, medium access control (MAC) is essential to coordinate the channel access among competing devices. The unique UWB characteristics not only pose significant challenges but also offer great opportunities in efficient UWB MAC design. This paper presents a comprehensive overview of UWB MAC development on four important aspects: multiple access, overhead reduction, resource allocation, and quality of service (QoS) provisioning, and identifies some future research issues. 相似文献
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超宽带(UWB)以其传榆速率高、抗多径和抗干扰能力强等优点,在短距多址无线通信中良好的应用前景而引起广泛研究.文章提出了一种基于ML的UWB同步接收方案,采用相关器与ML估计准则结合在一起实现同步.仿真结果表明:捕获的导频序列M越长和估计的支路数越多,误码率就越低. 相似文献