In order to improve coverage and reliability of the wimax system, the ieee 802.16 standard supports multiple antenna techniques such as alamouti space-time coding, adaptive antenna system and multiple input multiple output.
为了增加覆盖范围和系统的可靠性，ieee 802.16标准支持alamouti方案的空时码、自适应天线和多输入多输出技术在内的多天线技术。
In order to improve coverage and reliability of the WiMAX system, the IEEE 802.16 standard supports multiple antenna techniques such as Alamouti Space-time Coding, Adaptive Antenna System and Multiple Input Multiple Output.
多天线技术在提高频谱效率、支持更高速的数据传输、提高传输信号质量、增加系统覆盖范围和解决热点地区的高容量要求等方面有无可比拟的优势，已经成为目前研究的热点问题，并广泛应用于各种移动通信系统中[1-5]。
The invention provides a 3G base station signal digital extending method and device that characterized in that: it includes coupler, central unit CU, remote unit RU and antenna feed line subsystem, the down-board radio frequency signal of base station is coupled to the input end of CU via coupler, the output end of CU end is connected with the input end of RU end via optic fiber, the output end of the RU end is emitted by the antenna feed line subsystem via the emission antenna mouth; Up-board chain RU receives the two path up-board radio frequency signal from antenna and main receiving antenna, and sends to the CU end via fiber, and coupled by coupler for the base station; the invention realizes digital big cavity remote overlay, the machine room of base station is decreased greatly, 3G network can be built quickly and flexibly, the capital expenditure and operating cost can be decreased effectively.
本发明提供一种3G基站信号数字化延伸方法与装置，其特征在于：由耦合器、中心单元CU、远程单元RU和天馈线子系统组成，基站的下行射频信号经耦合器耦合到CU端输入端，CU端的输出端通过光纤连接到RU端输入端，RU端的输出端通过发射天线口由天馈子系统发射出去；上行链路RU分别接收来自分集接收天线和主收发天线的两路上行射频信号，经光纤送到CU端，通过耦合器耦合给基站接收；本发明通过光纤实现了基站射频信号的数字化大容量远程覆盖，而且可大量减少基站站点机房，快速灵活构建3G网络，有效降低运营商资本支出和运营成本。
Impedance matching the system the conditions for maximum energy transfer, usually there are three matching cases:(1) PAs in the larger tube and the matching between the load resistance, such as the the transmitter output stage, should be made larger tube optimal load and the equivalent resistance equal to the antenna, so as to ensure the zoom control work in the best condition, the output maximum power; (2) power supply circuits, the load impedance and power should be made conjugate match impedance, that is equal to the real part of resistance, reactance conjugate imaginary part, so that the maximum power output of power plants; (3) transmission line and load matching is required so that the load impedance is equal to transmission line The characteristic impedance, so that line in a traveling wave state, in order to eliminate the load on the signal reflection, television receiver between the antenna and feeders, feeder lines between the tuner and the TV should have a good impedance matching, otherwise the signal will be repeated reflection and the incident, resulting in ghosting.
阻抗匹配是系统最大能量传输的条件，通常有三种匹配情况：（1）功率放大器中放大管与负载电阻间的匹配，如发射机的输出级，应使放大管最佳负载与天线的等效电阻相等，这样才能保证放大管工作在最佳状态、输出最大功率；（2）供电电路中应使负载阻抗与电源阻抗共轭匹配，即实部电阻相等、虚部电抗共轭，以使电厂输出最大功率；（3）传输线与负载的匹配，需使负载阻抗等于传输线的特性阻抗，使线路处于行波状态，以消除负载对信号的反射，电视接收机的天线与馈线之间、馈线与电视机高频头之间就应该有良好的阻抗匹配，否则信号会有多次的反射与入射，造成重影。
The transmitter output power is the average value of the power delivered to an artificial antenna or radiated by the MS and its integral antenna, over the time that the useful information bits of one burst are transmitted.
发射机输出功率是指在一个突发脉冲的有用信息比特时间上，传递到外接天线或MS内部天线辐射的功率的平均值。
For example, the goal of software radio is the application of digital technology as much as possible to the nearest antenna components, to achieve broadband A/D converter, thereby receiving antenna in the output of direct output of digital radio frequency signal, and then through the DSP device programming To realize all the behind the receiver functions.
比如，软件无线电的目标就是将数字化技术尽可能应用到最接近天线的部件中，实现宽带A/D转换，从而在接收天线的输出端直接输出数字化射频信号，然后通过DSP器件编程来实现后面所有的接收机功能。
A label producing apparatus (1) that produces a label with print to be affixed to a target object comprises a feeding roller (27) that feeds a cover film (103) or a base tape (101) to be bonded thereto, a print-head (23) that performs printing on the cover film (103), an input/output interface (113) that inputs a first and a second command signal for providing instructions regarding operation to at least one of a plurality of devices for working of the tag label producing apparatus (1), including the feeding roller (27) and the print-head (23), from an external source via wired and wireless communication, and a loop antenna (LC2) for information acquisition, wherein at least the one device for working is controlled based on the inputted first or second command signal so as to ensure that the corresponding operation is performed.
本发明揭示了一种标签产生装置(1)，该标签产生装置(1)产生待粘贴到目标物体的带有印记的标签，包括：馈送辊(27)，该馈送辊馈送覆盖膜(103)或待粘结至该覆盖膜的基带(101)；打印头(23)，该打印头在覆盖膜(103)上实施打印；输入/输出接口(113)，该输入/输出接口通过有线和无线通信从外部来源输入第一和第二命令信号，第一和第二命令信号用于提供涉及包括馈送辊(27)和打印头(23)的标签产生装置(1)的多个用于工作的装置中的至少一个的操作的指令；以及用于获取信息的环形天线(LC2)，其中，基于输入的第一或第二命令信号来控制用于工作的装置中的至少一个，从而确保实施相应的操作。
This paper has discussed the microstrip antenna radiation theory, at the same time, using the quarter of wavelength impedance converter, single heading back matching network design and other methods, has designed the output resistance of 50 Ω matching networks, and used the Smith Chart and other related software to optimize and design the S-parameters of the matching network. According to the given characteristics of the simulation results, the best option is achieved.
本文论述了微带天线的辐射原理，同时，采用阻抗变换器、单节短截线匹配网络设计等多种方法设计出了输出电阻为50 的相关匹配网络，并且运用了Smith圆图等相关软件优化设计了匹配网络中的S参数，相应地给出了一些特性参数的仿真结果，通过结果的比较，选出了最佳方案。
Aim at the affection of tracer flame to tracer shell, telemetering and quantitative tests were made. The results indicate that there is noise of hundreds millivolts at the fuze RF output end of projectile body-type antenna. Most of the energy is lower than 100 Hz.
针对曳光榴弹的曳光火焰对无线电引信工作的影响，进行了靶场遥测和地面定量测试，发现曳光会使弹体天线引信射频输出端有数百毫伏噪声，绝大部分能量集中在100 Hz以下。
It can be output by using coil antenna or balanced and un-balanced transformer.
可以使用环形天线或者平衡和不平衡变压器输出。
ATbstract: he small frequency modulated transmitter, the power is small, may launch the wireless signal, accepts the signal with the radio, satisfies certain transmission range, Circuit easy system, low cost, power output does not exceed 5-8 mW, firing range to be in the housing area of about 100 meters, with an ordinary FM radio receivers, demonstrating his superb sensitivity and clarity, the most circuit design challenges of the part is only used 3 V power supply, and half-wave antenna will be such a launch capability. simultaneously can input the sound signal, may install modulation surveillance table to serve as the monitoring device, although the power is not very big, but should the interference protection normal radiobroadcasting signal.
小型调频发射机，功率小，可以发射无线信号，用收音机接受信号，满足一定的发射距离。电路简单易制，造价低廉，输出功率不超过5－8mW，发射范围在房屋区可至100米左右，用一部普通的FM收音机接收，显示其灵敏度和清晰度俱佳，电路设计中最富挑战性的部份就是只需用3V电源和半波天线便有如此的发射能力。同时能够输入声音信号，可安装调制监视表头用作监视器，虽然功率不是很大，但是应该防止干扰正常的无线广播信号。
I do NOT like one antenna/final amplifier output.
我不喜欢就有一个天线接口或者功放输出。
During the study of the system, the emphasis is laid on the matching problem of ICP coupled antenna via the RF matching device and RF power source. When the output power of the RF is within 500W and the reflection power is within 10W, a good matching effect can be gained.
通过对探针诊断结果的分析，设计并制作一套ICP刻蚀系统，重点研究ICP耦合天线通过射频匹配器与射频功率源的匹配问题，得到很好的匹配效果，在射频输出功率为500W以内时，反射功率小于10W。
This paper analyzes the output SINR of adaptive array antenna in the presence of amplitude and phase errors.
以自适应阵列的输出信干噪比（SINR）为对象，研究了通道幅相不一致性对它的影响。
Using an adaptive process, the weights of the auxiliary antenna outputs are adjusted, and the interference in the main antenna output are estimated.
利用辅助天线输出中的干扰成分，自适应的调整其加权系数，最大程度的估计出主天线输出中的干扰。
Transmit Antenna Selection and Its Impact on the Capacity of Multiple Input Multiple Output Systems
多输入多输出系统发射天线选择对系统信道容量的影响
Antenna selection techniques not only can increase capacity of multiple input multiple output (MIMO) systems, but also can reduce their complexity and cost of RF (radio frequency) chains in Rayleigh fading channels. Hence antenna selection algorithms play an important role in MIMO systems.
在瑞利衰落信道条件下，通过天线选择可以提高多输入多输出（MIMO）系统的容量，并能有效地降低MIMO系统的复杂度和射频成本，天线选择算法也成为问题的关键。
Multiple-input multiple-output (MIMO) antenna system using space diversity to improve the capacity of wireless communication systems and information rate, is the mainstream of the development of next generation mobile communication structure.
多输入多输出（MIMO）天线系统由于采用空间分集技术，有效提高无线通信系统的容量和信息率，正成为新一代移动通信结构发展的主流。
The establishment and development of the multi-antenna information theory have revealed that the MIMO (Multi-Input Multi-Output) technique can provide extraordinarily high spectral efficiency gain over the traditional single antenna systems, which have also laid the theoretical foundation for the invention and applications of space-time codes.
多天线信息理论揭示了多输入一多输出（MIMO：Multi-inputmulti-Output）技术所具有的远远超越于传统单天线系统的高效传输性能，为空时编码技术的产生与应用奠定了坚实的理论基础。
In terms of concept of radio highfrequency antenna impedance matching and analyzing design of energy converter of the brain disease curing device, a engineering method of designing the supersonic-wave power output transducer are given and precautions are shown finally in this paper.
本文借助无线电高频天线阻抗匹配的概念，通过对脑病治疗机换能器设计的分析讨论，给出了超声波功率输出换能器工程设计的方法及应注意的几个问题。