查询词典 wide band

An equipment for mixed use of wide-band ADSL and marrow-band cards features that associated LVDS transceiver and on-board connector are installed to ATVC card and WAN card. The high-speed wide band ADSL data line can use LVDS mode to conveniently realize the mixed use of wide-band ADSL and ordinary analog user card on narrow-band speech exchange or the ONU rack of optical network unit. It is connecessary to modify the backplate of POTS and machine rack. The existing narrow-band device can be upgraded to have wide-band access function.

本发明提供了一种宽带ADSL和窄带用户板混插的装置，通过在ATUC板和WAN板上提供相应的LVDS收发器和板上连接器，高速宽带ADSL数据通过背板外LVDS走线方式，可以在普通窄带话音交换机或接入网光网络单元ONU的机框上，方便地实现宽带ADSL与普通模拟用户板之间的混插，这种方法不需要对窄带话音POTS的背板和机框作任何改动，即可实现窄带到宽带的平滑过渡，对已有窄带设备可提供随时升级为宽带数据接入功能的方法及设备。

The dual-band differential LNA use Inductive source degeneration structure, a matching network is used for the LNA to develop dual-band. The micro-mixer use a matching network shunt and parallel LC elements to develop wide-band matching. The biasing method reduces the"voltage headroom" difficulties inherent to the Gilbert cell, and the mixer linearity can be improved using this biasing method "Charge -Injection"by accurate adjustment of the input MOSFET operating point. The complementary VCO based on 2.5GHz, and tuning output buffer to approach 2GHz/5GHz dual-band for dual-band down-converter with MMIC technology.

其中双频差动低杂讯放大器，本电路用Inductive Source Degeneration 架构，在匹配网上设计，使低杂讯放大器工作在个频带上达成双频带的效果；CMOS 微混频器上采用LC串联、并联电路做匹配，达到宽频匹配的效果，并加入了"Charge-Injection"的方法来改善"voltage headroom"的问题，并同时提高线性度的表现；互补式压控振荡器以2.5GHz为基频的振荡器为出发点，透过电路的调整，以期达成2.5/5GHz的双频带需求，能够完整达成双频带接收机系统。

First, the article analyses the current situation of the Wide Band transmission optical network of Metro and put forward its target of next development. And it continues to talk about the key technology of the Wide Band transmission optical network of Metro: optical caber, MSTP, DWDM, RPR and make comparison with them. It offers the general plan of construction of the Wide Band transmission optical network of Metro.

首先，本文分析了目前宽带城域光传送网的现状，提出了下一代城域光传送网的发展目标，论述了城域光传送网中的主要关键技术：光纤直连、多业务传送平台、城域波分、弹性分组环，并对这几种技术进行了对比分析，提出了宽带城域光传送网总体建设方案。

Double channel bandpass sampling method for wide band IF signal is presented to settle the problem of blind zone,which exchanges one more sampling channel for simplification of clock circuit and band pass filter.As a practical reconnaissance receiver, real-time processing performance must be considered.Digital channelizing method lays the base of parallel processing by multi DSP chips and discarding of the redundant data resulting from double channel bandpass sampling.

针对带通采样存在着频率覆盖盲区的问题，提出了宽带中频信号双通道带通采样的方法，通过增加一个采样通道既解决了传统处理盲区方法中设计复杂采样时钟电路、高矩形系数滤波器的困难，还缓解了后续DSP处理压力。

For every ULA, the wide-band signals are sampled in spatial and temporal, then 2-D discrete Fourier transform is carried out. A projection operation on 2-D representation of wide-band signals is applied in the spatial-temporal frequency domain. The direction cosine relative to the ULA axes is estimated by MUSIC algorithm.

该方法采用3个共面的均匀线阵，每一均匀线阵对宽带信号空间采样，然后进行空时二维DFT变换，在空时频率域对宽带信号进行投影变换，用MUSIC算法实现宽带来波信号方向余弦的估计。

The bit error rate performance for ultra-wide band indoor communication with impact of metallic furniture is investigated.

在这篇论文里，我们将探讨室内的金属家俱在超宽频(Ultra-Wide Band，UWB)通讯上对位元错误率的影响。

The independent brand "VOLANS wide band router" is among the best in the domestic wide band router domain, it is located at first ten in all wide bands routers' attention for a long time in the third party media investigation and study report.

自主品牌"飞鱼星宽带路由器"在国内宽带路由器领域中名列前茅，在第三方媒体调研报告中长期位于所有宽带路由器关注度的前十名。

The wide band characteristics of millimeter wave can be applied for solving many problems on wide band wireless access.

毫米波的宽频带特性可以有效地解决高速无线接入中面临的许多问题。

Matching facilities: Bed table wide band furniture: Bed, table, wide band repair situation: Good environment: In Zhongqingnalu Haixin plot traffic condition: 12 groups 20 group 208 group 219 group 229 group 303 group 310 group 365 group 365 group 372 groups 37 explained in detail: Four directions Zhongqingnalu in the Haixin plot has two person between hires, the area 16 square meters, the southing, the natural lighting is good, has the kitchen, the bathroom, the wide band, has the direct link municipal government/Taitung/University of Science and Technology/Li Village's vehicle.

个人 配套设施：床桌子宽带家具：床、桌子、宽带装修情况：良好周围环境：重庆南路海信小区内交通状况： 12路 20路 208路 219路 229路 303路 310路 365路 365路 372路 37 详细说明：四方重庆南路海信小区内有双人间出租，面积16平米，南向，采光好，有厨房、卫生间，宽带，有直达市政府/台东/理工大学/李村的车。

Under the linear relationship between narrow band and broadband albedos, according to the same time MODIS image data of narrow-band albedo, multiple linear regression equation was established to achieve narrow-band to wide-band Albedo retrieving.

在窄波段反照率与宽波段反照率之间存在线性关系的前提下，通过与相同时段的MODIS图像数据的窄波段反照率建立多元线性回归方程，构建回归模型，实现窄波段到宽波段的反演。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。