查询词典 receiver-transmitter

Firstly, the performances of linear and nonlinear algorithms based on interference estimator/subtracter are compared. Secondly, a novel interference suppression algorithm based on subspace tracking is proposed for the tone interference model. Finally, the stability performance of the transform domain normalized least mean square adaptively implementing structure of minimum bit error ratio receiver is analyzed.

总结和比较了基于AR干扰模型的各种干扰估计抵消算法性能；从音调干扰模型出发，提出一种新的基于子空间跟踪的时域干扰抑制技术；讨论了基于低速数字干扰等效"虚拟"多用户干扰模型的最小误码率接收机的变换域归一化最小均方自适应实现结构及其稳态性能。

I n the early 1930's, the superheterodyne receiver was king.

I n 30 年代初期，超外差的接收器是国王。

The essay introduces the systematic structure of superheterodyne , and states the receiver's structure and design target based on that kind of system.

本文介绍了超外差的体系结构，并说明了基于此类体系的接收机的框架和研究指标。

In this paper, AM receiver circuit design as the background, in order to improve the sensitivity and selectivity, it is necessary to the use of superheterodyne radio.

本文以调幅接收机电路设计为背景，为了提高灵敏度和选择性，就要采用超外差式收音机。

Armstrong conceived the superheterodyne radio receiver principle in 1918, while

年阿姆斯壮设想了超外差的无线电接收机原则，当服务在军队信号军团在法国。

This design keep the twice frequency transform and the superheterodyne structure in analog receiver,and use programmable Direct Digital Synthesizer in RF section.

在此基础上还介绍了两种常见的软件无线电实现方案以及依赖的硬件平台，并提出了适合本设计背景的短波定时接收机方案。

Since the superheterodyne receiver was invented, mixer has long been the research focus in communication and radio frequency circuit fields, which is the key component to realize the frequency translation.

自从超外差接收机的结构被提出以后，混频器作为其中实现频率搬移的关键部件一直都是通信和射频电路研究的热点。

This paper gives the particular description of theoretical analysis and practical design for a suspended interdigital bandpass filter which used for rejection the mirror image frequence of a superheterodyne receiver . Based on computer aided design, the parameters of the filter are given and simulated.

本文结合对超外差接收机中镜频抑制滤波器的研究，将传统的设计方法与先进的微波电路仿真软件HP-ADS相结合，对其进行建模、仿真、优化设计，并且加工了一个较高性能的4.8GHz～5.2GHz悬置线终端短路式交指型带通滤波器的实物。

Celestial radiation transmitted through the antenna to the receiving system, by the receiving system amplification, the receiving system is usually a superheterodyne receiver, but now they are mainly three categories: compensation type, modulation type, the relevant type.

天体辐射经天线传输到接收系统，由接收系统放大，接收系统通常是一具超外差式接收机，现在也主要有三类：补偿型，调制型，相关型。

When only using this mode, the disadvantage lies in that in the case of incomplete shielding, a supersensitive electromagnetic receiver can still acquire information

单一使用这种模式的缺点是，如果屏蔽不能彻底，高灵敏度的电磁接收设备还是可以获取信息。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。