收发

Polarimetric Synthetic Aperture Radar measures the frequency, magnitude, absolute and relative phase of targets' backscattering signals in imaging scene for any possible combination of transmit and receive antennas. The polarization synthesis technique on one hand has greatly increased the acquired polarization information, on the other hand increased the difficulty of system design and signal processing.

中文摘要极化合成孔径雷达的回波信号可以提供不同收发极化状态组合下成像场景内目标散射波的幅度、绝对和相对相位、频率等信息，极化合成技术的出现使获取的信息量成倍增加，信息量增加的同时系统设计和信号处理的复杂度增加，因此极化合成孔径雷达相关技术的研究成为微波遥感领域的热点。

Additionally, it' s a shortcoming in the law that the affirmation of time of arrival is not intact, so the rule of retrieval should be supplied, and the effect of acknowledgement of receipt should be defined as well.

电子签名法》对于数据电文到达时间的确定存有缺漏情形，应当补充检索到达规则，以合理分配风险。同时，确认收讫规则与收发时间规则的适用界限以及确认收讫的法律效果尚须进一步明确。

Additionally, it, s a shortcoming in the law that the affirmation of time of arrial is not intact, so the rule of retrieal should be supplied, and the effect of acknowledgement of receipt should be defined as well.

电子签名法》对于数据电文到达时间的确定存有缺漏情形，应当补充检索到达规则，以合理分配风险。同时，确认收讫规则与收发时间规则的适用界限以及确认收讫的法律效果尚须进一步明确。

The selection of the data transmission scheme is carried out during an active communication link between the first and a second transceiver unit.

在第一和第二收发器单元之间的活动通信链路期间执行对数据发送方案的选择。

An experimental system of ultraviolet scattering communication is implemented to realize the voice and data transmission. The communication distance and the apex angle of the system are also studied.

构建了紫外光散射通信实验系统，实现了语音和数据传输，并对系统的通信距离和收发仰角进行了实验研究。

It is sure that CMOS process will be replacing the III-V compound process such as gallium arsenide or silicon bipolar process that were dominant in the fields of radio frequency and microwave.

采用CMOS工艺进行射频电路设计的一个好处是，使得模拟射频收发器电路和基带信号处理电路由同种工艺实现，迎合了单片系统集成的发展趋势。

The present paper main description controls the nRF401 wireless receiving and dispatching chip realization by the AT89S52 monolithic integrated circuit the near distance wireless communications system design proposal, and has realized the keyboard entry data and the LED demonstration receiving and dispatching condition, and accepts with the firing data time examines wrong and the verification.

本论文主要描述由AT89S52单片机控制nRF401无线收发芯片实现的近距离无线通信系统的设计方案，并实现了键盘输入数据及LED显示收发状态，及接受和发射数据时的检错与校验。

So the analysis of calibration is an emphasis in the article.The article provides the demonstrations of the light source, transmitting/receiving set and homochromor.

本文在实验装置的设计方面，主要对包括光源、收发装置、单色仪等部分进行了充分论证，确定了光源和收发装置，对单色仪的参数进行了计算与选择；在硬件设计的最后部分，对整个实验装置进行了系统整合，使之成为了一个有机的整体。

E-mail program that can be applied to other programs as a module, which can also be used to do e-mail, regular supp...

电子邮件收发程序，可以应用于其它程序中作为一个模块，也可以独立用来做电子邮件收发，支持定时、多帐号。

RF modules covering GSM, CDMA, TD-SCDMA, WCDMA, WLAN and Wimax wireless communications systems, active modules include power and frequency of the linear power amplifier, transceiver components, modules and integration of selected frequency modules, Passive radio frequency modules, including various types of filters, diplexers, a road, splitters and couplers; wireless network optimization campaign整机including PHS, GSM, CDMA, TD-SCDMA and WCDMA straight-machine, RF Rafah Yuan and indoor distribution systems, digital television, including digital TV mobile wireless transceiver modules, wireless transponders, digital mobile TV repeater, and so on.

射频模块涵盖了GSM、CDMA、TD-SCDMA、WCDMA、WLAN和Wimax等无线通信系统，有源模块包括各种功率和频率的线性功率放大器、收发组件、选频模块和一体化模块等，无源射频模块包括各类滤波器、双工器、合路器、功分器和耦合器等；无线网络优化系列整机包括PHS、GSM、CDMA、TD-SCDMA和WCDMA直放机、射频拉远和室内分布系统等；数字移动电视包括数字电视无线收发模块、无线转发器、数字移动电视直放站等。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。