The frequency synthesizer is a kind of discrete frequency singal generator with high stability, and it is widely used in communication, radar, apparatus and navigation system.
频率合成器是一种频率稳定度较高的离散间隔型频率信号发生器，广泛应用在通信、雷达、仪器仪表及导航系统中。
In the communication of multiplex system, the DS signal exists Doppler frequency shift for the high dynamic situation of aerocraft.
在复合系统通信中，飞行器的高动态使扩频信号存在多普勒频移。
Orthogonal frequency division multiplex (OFDM) is suitable for Broadband-satellite mobile communication system with the advantage of robustness to muti-path and high bandwidth efficiency.
正交频分复用(OFDM)技术具有抗多径衰落，频谱利用率高等优点，适合于在宽带卫星通信这种无线环境下进行高速传输。
Its business covers network communication, computer system integration, surface mounting technology, printed circuit boards, electricity meters, micro motors, and high frequency devices.
其业务范围包括网络通信，计算机系统集成，表面贴装技术，印刷电路板，电表，微型电机，和高频设备。
It has high frequency efficiency and its implement is simple. Therefore, it has become the topic in high-speed mass optical fiber communication system.
它具有结构简单，频谱利用率高的优点，因此成为高速大容量光纤通信系统中的研究热点。
PA is very important in the wireless communication system, it amplify high frequency signal to the desired power which is sent through the antenna.
射频功率放大器模块是无线通信收发器中的重要模块，它的作用是放大高频信号至所需的功率，并送至天线辐射出去。
PA is very important in the wireless communication system, it amplify high frequency signal to the desired power which is sent through the antenna.
射频功率放大器模块是无线通信收发器中的重要模块，它的作用是放大高频信号至所需的功率，并送至天线辐射出去。
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