发射机

Decreasing the apex angle appropriately of the transmitter helps the signal detection when the scattering angle remains unchanged.

计算结果还表明，在散射角和传输距离一定的情况下，适当地降低发射机的仰角可以提高接收机探测到的信号功率和信噪比。

Firstly it describes the development ,basic principle and application and propagation characteristic of mobile channel , then investigates the system structure of DAB transmitter and receiver separately and the key technology of realization of the digital audio broadcast system.And then discusses the system component of FFT －the demodulation module of OFDM .The 409- points FFT module employs a radix-4 decimation-in-frequency algorithm, includes arithmetic element , read and write address element ,twiddle factor element and control element , is realized by FPGA. In the end , the result is verified in the matlab .

首先概述了OFDM的发展、基本原理和应用以及移动信道的传播特性，接着分别研究了数字音频广播接收机和发射机的系统结构，以及数字音频广播系统实现的关键技术，然后详细论述了OFDM解调模块FFT的系统结构，主要研究了4096点FFT采用基－4按频率抽取实现的算法，整个FFT模块包括了运算单元、读写地址单元、旋转因子单元以及控制单元，并且在FPGA中进行了硬件实现，并在matlab环境下对结果进行了验证。

In order to improve the efficiency and precision of transmitting equipment test, an automatic testing system is designed.

为提高发射机发射模块的测试效率和精度，设计了一套自动测试系统。

Because infrared devices need to be lined up directly on opposing locations, too little interference occurs between transmitters and receivers.

由于红外设备需要排队直接对立的位置，太少之间发生干扰发射机和接收机。

As the development of modern electronic technology, the high efficiency and broad band acoustic transmitter for the battery using equipments, such as acoustic buoyage, portable underwater acoustic communication equipment and small scale underwater detector is demanded.

随着现代电子技术的发展，一些使用电池供电的水声设备如水声浮标、便携式水声通信设备、便携式水下探测设备等对发射机高效率、宽频带的要求越来越高。

K. Press the set-up button with the stick still in this position.

h。 确认发射机油门位处於中立点位置，油门微调钮调整至中间位置。

In Europa are similar suitable locations for ELF transmitters, to be found in areas covered by the Baltic and the Caledonian shields.

在欧洲，合适建造ELF发射机的位置在波罗的海地盾和加里东地盾覆盖的区域。

Guglielmo Marconi, recognizing the possibility of using these waves for a wireless communication system, gave a demonstration (1895) of the wireless telegraph, using Hertz's spark coil as a transmitter and Edouard Branly's coherer (a radio detector in which the conductance between two conductors is improved by the passage of a high-frequency current) as the first radio receiver.

Guglielmo Marconi，认可使用这些波浪的可能性为一个无线通信系统，给了一次示范(1895)无线通信机，使用赫兹的火花卷因为发射机和Edouard Branly 的coherer (导率在二个指挥之间被高频率潮流段落改进)的一台无线电探测器如同第一无线电接收机。

UK based decal company Decal Designs have announced that they have started to make custom transmitter skins.

英国的标记贴花设计公司已经宣布，他们已经开始习惯发射机皮肤。

He will run the company's decals and transmitter skins for the 2009 season.

他将在该公司的标志和发射机兽皮的2009赛季。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。