Methods of measurement for equipment used in digital microwave radio transmission systems . part 2 : measurements on terrestrial radio - relay systems . section 11 : cross - polarization interference canceller 数字微波无线电发射系统使用设备的测量方法.第2部分:陆地无线电中继系统的测量.第11节:交叉极化干扰消除器
Methods of measurement for equipment used in digital microwave radio transmission systems - part 2 : measurements on terrestrial radio - relay systems - section 11 : cross - polarization interference canceller 数字微波无线电发射系统使用设备的测量方法.第2部分:地面无线电中继系统的测量.第11节:交叉极化擀扰消除器
Dale lonizing air blowers are the static elimination devices which deliver ion stream to meutralize wide forcused areas , their fiatures are quickly nertralizes static charges , build - in imitter cleaner adjustable speed control for pressence of ionization , integrated blower and power supply 迪尔离子风机,可提供平衡离子气流的宽范围集中区域的离子消除器,其特点是快速中和静电；设有离了发射针清洁器；可连续调节风速,离子产生指示器,内置的风机和电源供应器。
The strategy eliminates the disturbance with zero deviation and improves the reliability of fault diagnosis . ( 2 ) in the light of reality adopting double redundant gyroscope , the fault diagnosis model for double redundant sensors taking the basic principle of adaptive noise cleaner is established . the diagnosis method , recurrence algorithm and implement are given ( 2 )根据检测子系统采用双冗余陀螺仪的实际情况，利用自适应噪声消除器的基本原理构造了双余度传感器的故障诊断模型，给出了双余度传感器的故障诊断原理和递推算法，实现了双冗余陀螺仪的故障诊断。
Section ii describes the design approach and implementation of speech module on mcf5249 coldfire core . the speech codec optimizes g . 729a codes and added voice activity detection of g . 729b to save bandwidth ; the implementation of acoustic echo cancellation uses nlms algorithm and it can reduce echo though designing adaptive fir filter and speech detector ; the dtmf and cpt generate signal using two second order digital sinusoidal oscillators and detect signal by picking up the frequency information . but only get the frequency information is not enough in cpt detector , this thesis introduces a method 其中对语音编解码器的设计采用优化g . 729a代码达到设计要求,并在此基础上加入g . 729b的静音检测模块,以进一步降低网络传输带宽;对回声消除器的设计采用nlms算法,通过设计自适应fir滤波器和语音检测器达到回声消除目的;对双音多频设计,信号发生端采用构造静态参数表并通过二阶正弦振荡器产生信号,信号检测端提取频率信息以检测信号;对呼叫进程音设计,除了类似双音多频的信号发生及频率检测设计外,还需要检测信号持续时间,作者设计了一种基于匹配状态表的方法以检测信号持续时间。
Based on x - filtered lms algorithm and - filtered lms algorithm adaptive inverse control , we use a new variable step size lms algorithm . adding little computation , variable step size lms algorithm can result in fast convergence speed and low residual error simultaneously . the adaptive feedback control can counteract the beginning error of the system 在原来的x -滤波lms算法自适应逆控制和-滤波lms算法自适应逆控制方法的基础上，引入了新的变步长lms算法，在计算量增加不多的前提下，能同时获得较快的收敛速度和较小的稳态误差；引入自适应的反馈补偿控制克服了被控系统的直流零频漂移，使控制系统在初开始工作阶段快速收敛；还引入自适应扰动消除器，它能最大限度的消除扰动。
General seminconductor , inc . is a market leader in the discrete segment of the semiconductor industry with manufacturing facilities in china , france , germany , united states , etc . the company provides customers with a broad array of power rectifiers , transient voltage suppressors and small signal transistors and diodes 通用半导体有限公司是世界上半导体切片工业的领导者，它的制造厂遍及中国、法国、德国、美国等国家。公司提供多种多样的整流器、瞬态电压消除器、小信号晶体管以及二极管。
We develop and produce the equipment of amplifiers . the main products are as follows : digital conference system , digital frequency shift amplifiers for teaching , long distance network conference system , simultaneous interpretation system and microphone for conference and special purpose . haisheng company has been dedicating to producing professional audio frequency equipment for conference and teaching 主要产品有：数字移频扩声设备dsp声反馈抑制扩声设备数字化会议系统同声传译系统网会通网络会议用usb speaker phone回声消除器界面话筒会议式鹅颈话筒高保真会议音柱专业麦克风等。
