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Antenna-Rake

  • the handbook of antenna design1

    the handbook of antenna design backmatter

    标签: handbook antenna design

    上传时间: 2016-10-18

    上传用户:see_it

  • the handbook of antenna design2

    the handbook of antenna design chapter1

    标签: handbook antenna design2

    上传时间: 2016-10-18

    上传用户:see_it

  • the handbook of antenna design

    the handbook of antenna design chapter2

    标签: handbook antenna design the of

    上传时间: 2016-10-18

    上传用户:see_it

  • rake接收机

    对于超宽带情况下的rake接收机,进行了详细的介绍。

    标签: rake 接收机

    上传时间: 2017-10-26

    上传用户:静静dou

  • Distributed Antenna Systems

    The rapid growth in mobile communications has led to an increasing demand for wide- band high data rate communications services. In recent years, Distributed Antenna Systems (DAS) has emerged as a promising candidate for future (beyond 3G or 4G) mobile communications, as illustrated by projects such as FRAMES and FuTURE. The architecture of DAS inherits and develops the concepts of pico- or micro-cell systems, where multiple distributed antennas or access points (AP) are connected to and con- trolled by a central unit.

    标签: Distributed Antenna Systems

    上传时间: 2020-05-27

    上传用户:shancjb

  • Large-scale+Antenna+Systems

    To meet the future demand for huge traffic volume of wireless data service, the research on the fifth generation (5G) mobile communication systems has been undertaken in recent years. It is expected that the spectral and energy efficiencies in 5G mobile communication systems should be ten-fold higher than the ones in the fourth generation (4G) mobile communication systems. Therefore, it is important to further exploit the potential of spatial multiplexing of multiple antennas. In the last twenty years, multiple-input multiple-output (MIMO) antenna techniques have been considered as the key techniques to increase the capacity of wireless communication systems. When a large-scale antenna array (which is also called massive MIMO) is equipped in a base-station, or a large number of distributed antennas (which is also called large-scale distributed MIMO) are deployed, the spectral and energy efficiencies can be further improved by using spatial domain multiple access. This paper provides an overview of massive MIMO and large-scale distributed MIMO systems, including spectral efficiency analysis, channel state information (CSI) acquisition, wireless transmission technology, and resource allocation.

    标签: Large-scale Antenna Systems

    上传时间: 2020-05-27

    上传用户:shancjb

  • Design of Dual Band MIMO Antenna for 5G Smartphone

    Design of Dual Band MIMO Antenna for 5G Smartphone Application

    标签: mimo 5g

    上传时间: 2022-02-26

    上传用户:xsr1983

  • RF至数字接收器的信号链噪声分析

      Designers of signal receiver systems often need to performcascaded chain analysis of system performancefrom the antenna all the way to the ADC. Noise is a criticalparameter in the chain analysis because it limits theoverall sensitivity of the receiver. An application’s noiserequirement has a signifi cant infl uence on the systemtopology, since the choice of topology strives to optimizethe overall signal-to-noise ratio, dynamic range andseveral other parameters. One problem in noise calculationsis translating between the various units used by thecomponents in the chain: namely the RF, IF/baseband,and digital (ADC) sections of the circuit.

    标签: 数字接收器 信号链 噪声分析

    上传时间: 2014-12-05

    上传用户:cylnpy

  • 优化输电线路 精确测量电压驻波比(VSWR)

    Abstract: Impedance mismatches in a radio-frequency (RF) electrical transmission line cause power loss andreflected energy. Voltage standing wave ratio (VSWR) is a way to measure transmission line imperfections. Thistutorial defines VSWR and explains how it is calculated. Finally, an antenna VSWR monitoring system is shown.

    标签: VSWR 输电线路 精确测量 电压驻波比

    上传时间: 2013-10-19

    上传用户:yuanwenjiao

  • 基于HITAG读写芯片HTRC110的读写设备设计

    Designing read/write device (RWD) units for industrial RF-Identification applications is strongly facilitated by the NXP Semiconductors HITAG Reader Chip HTRC110. All needed function blocks, like the antenna driver, modulator demodulator and antenna diagnosis unit, are integrated in the HTRC110. Therefore only a minimum number of additional passive components are required for a complete RWD. This Application Note describes how to design an industrial RF-Identification system with the HTRC110. The major focus is dimensioning of the antenna, all other external components including clock and power supply, as well as the demodulation principle and its implementatio

    标签: HITAG HTRC 110 读写芯片

    上传时间: 2013-10-22

    上传用户:zhengjian