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The rising internet-of-things applications in home automation, smart wearables, healthcare monitoring demand small, area efficient, high-performance and low power radio frequency (RF) blocks for effective short-range communication. This growing market demand is addressed in this paper by proposing a fully CMOS radio frequency front-end (RFE) exploiting bulk effect. Apart from the primary function of frequency translation, proper circuit performance concerning the linearity, conversion gain, and noise figure is required for low-cost densely integrated transceivers operating in the 2.4 GHz ISM band. The proposed RFE at 2.4 GHz is designed and implemented in UMC 180 nm CMOS process technology with two modes of operation. In high gain mode (Mode-I), the post-layout simulation with SpectreRF shows a peak gain of 30.06 dB, IIP2 at 64.52 dBm, IIP3 at −2.74 dBm and a DSB-NF of 7.68 dB while consuming only 9.24 mW from the 1.8 V supply. In the high linear mode (Mode-II), the RFE achieves a higher IIP3 of 10.78 dBm, IIP2 of 91.56 dBm, the conversion gain of 23.5 dB, DSB-NF of 9.46 dB while consuming a low power of 3.6 mW. The fully CMOS circuit occupies a core area of only 0.0021 mm2. The proposed front-end exhibits a spurious free dynamic range (SFDR) of 81.18 dB ensuring the high dynamic operation of the wireless system. 相似文献
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针对60-GHz无线个域网,提出了一种吉比特里所码和卷积码级联译码器架构。在推荐级联架构中,里所码和卷积码分别作为外码和内码,通过交织器级联。采用基于Viterbi算法的8路并行卷积译码结构和基于RiBM算法的里所码译码结构,实现了超高速级联译码器。在TSMC 0.13μm CMOS工艺下,该译码器以0.135 nJ/bit和5.19 mm2的能耗资源开销实现了高达2 Gb/s的吞吐率。 相似文献
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There is an increasing interest in 60 GHz millimeter-wave (mmWave) communication technologies for multi-Gigabit wireless personal
area networks (WPAN), aiming to support broadband multimedia applications. Internet Protocol TV (IPTV) is an emerging killer
application which requires high data rate and stringent quality of services (QoS) in terms of delay and packet loss. In this
paper, we propose a method to efficiently support high definition video flows in a mmWave-based WPAN with QoS guarantee, considering
the characteristics of both the IPTV traffic and the mmWave communication technology. We first quantify the effective bandwidth
of IPTV video sources using a simple, two-level Markov traffic model. Considering the overheads of the protocol stack in mmWave
WPANs, we then quantify the minimum channel time needed for each IPTV flow. Since mmWave-based WPANs will deploy directional
antennas to not only extend the transmission range, but also reduce the interference level to neighboring flows, we further
propose an admission control scheme and scheduling algorithm to improve the network resource utilization by taking advantage
of concurrent transmissions. Extensive simulations with NS-2 using real video traces have validated our analysis and demonstrated
the efficiency and effectiveness of the proposed schemes, which will be an enabling technology for future mmWave-based WPANs
supporting IPTV services.
Part of this work was presented at 2008 Int. Conf. Heterogeneous Networking for Quality, Reliability, Security and Robustness
(QShine’08), Hong Kong, July 2008.
This work has been supported by research grants from the Natural Sciences and Engineering Research Council (NSERC) of Canada. 相似文献
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MB-OFDM UWB系统中高吞吐率Viterbi译码器的实现 总被引:2,自引:2,他引:0
提出了一种用于MB-OFDM UWB系统的高吞吐率低功耗Viterbi译码器结构.该结构利用基4蝶形单元的对称性,降低了Viterbi译码器的实现复杂度.采用SMIC 0.131μm CMOS工艺设计并实现了该译码器,在时钟频率为240MHz时,它的最大数据吞吐率为480Mb/s,功耗为135mW.在加性高斯白噪声信道下,它的误码率十分接近理论仿真值.该译码器可用于MB-OFDM UWB系统以及其他高吞吐率低功耗的通信系统中. 相似文献
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针对因移动通信的迅猛发展使得移动通信系统重新显现的频谱匮乏、容量不足等问题,提出一种基于单天线移动终端的蜂窝链路多入多出(MIMO)容量增强技术,即基于超宽带技术的广义虚拟多入多出(G-VMIMO)结构的应用。文章详细讲述了G-VMIMO结构的原理和特点,并从理论上分析该结构具有MIMO容量增强性能。文章给出了G-VMIMO系统的构成方法和协议流程,并针对系统实现所面临的难点进行了详细探讨。最后,计算机仿真验证了G-VMIMO系统的容量增强性能以及可行性。 相似文献
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基于蓝牙技术的无线个域网 总被引:6,自引:0,他引:6
介绍了多个蓝牙设备如何组成无线个域网,以及蓝牙个域网如何通过网络接入点接入公众网络的应用,并讨论了其网络构成、协议体系、组网过程和安全机制等问题. 相似文献
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无线局域网(WLAN)和无线个域网(WPAN)技术的发展带来的多媒体业务流量的剧增,使无线网络的资源管理、服务质量(QoS)保障等问题日益突出。传统的媒体访问控制(MAC)协议需要重新设计才能对无线网络的QoS问题进行有效地解决。文中研究了IEEEWLAN和WPAN工作组分别于2002年5月和2003年2月提出的IEEE802.11eD3.0和IEEE802.15.3D16两种协议标准的工作机制并对两者的性能作出了比较分析。 相似文献