调制

Using characters of periodic fading of channel in frequency selectivity, the invented method partitions orthogonal FDM modulation sub carrier wave into some sub bands in two types crossed arranged to be assigned to two typed users.

一种正交频分复用调制子载波分割与子带交叉排列的方法，用于数字信息传输技术领域。

The system's anti-multi-path fading ability is analyzed by the periodic auto-correlation function of multiwavelets and wavelets.

多小波分形调制在各尺度能够提供更多的子频带，为更多用户服务，具有更高的频带利用率。

Design consideration and design methods for periodic reversal permanent magnet focusing system are presented ,special technical problems met in design of multi-beam electron gun with controlling electrode are discussed.2D computer software or magnetic field and electron trajectory of electron optics system has been established,and applied to calculate the electron optics system of S-band 200 kW multi-beam klystron.

给出了周期反转永磁聚焦系统的设计方法和设计考虑，讨论了控制极调制多注电子枪设计中遇到的特殊问题和解决方法，建立了计算电子光学系统的二维磁场和电子轨迹计算软件，并应用这些软件设计和研制了S波段200kW多注宽带速调管的电子光学系统。

Prepare the soil medium. Preferably perlite or mixture of perlite and sand in order to obtain good drainage.

调制介质。最好使用珍珠石或使用沙土与珍珠石的混合物，以获得良好的排水。

Combined the NI PXI-5124 digitizer with the principle of digital quartered demodulation,the software demodulates the dispersed signal efficiently while showing the results perspicuously.

结合NIPXI-5124数据采集卡及数字正交解调的基本原理，该软件可实现对离散化的数字调制信号进行解调分析，同时直观地显示处理结果。

In this field the amplitude of voltage space vector is distorted and phase angle is continuous.

空间矢量过调制算法的研究。

Bandwidth Efficient Constant Envelope Continuous Phase QPSK Modulation ［J］.

带宽有效包络恒定的连续相位QPSK调制［J］。

In consideration of the lens as a phase modulator,the integral diffraction equation of the FZP was solved digitally.

对波带板的菲涅耳衍射积分方程进行了数值求解，计算时考虑了透镜的位相调制作用。

Finally, the system of full-duplex ROF based on phase modulation is simulated and transmission performance of it is analyzed.

最后仿真并对基于相位调制的全双工光纤无线系统的传输性能进行分析。

A method is presented based on tangent relationship and phase modulation technique for dynamic small angle measurement.

提出一种基于正切关系和相位调制技术的动态小角度测量方法。

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。。。。