遥感卫星地面站主要由天馈线、伺服分系统、接收分系统、站控分系统、调制器、解调器、记录设备和快视设备等构成。
The remote sensing satellite earth station is composed by antenna, feed subsystem , servo subsystem, receiver, station manage subsystem, modulator, demodulator, recorder and quick view equipment.
针对低莱斯因子信道中衰落和码间干扰的影响，提出了带内三重频率分集接收实现方式，给出了采用带内三重频率分集的调制器和解调器的原理框图。
For the influence of fading and ISI on low Rice factor channel, the system adopting diversity technology is presented, and the schematic diagram of the modem adopting diversity technology is given.
偶次分谐波混频可有效地抑制载波泄漏、二次混频失真及本振噪声，是提高调制器精确度及直接解调器动态范围的有效技术。
In this paper, we discuss even subharmonic mixing technique which can suppress carrier leakage in microwave direct modulator, or suppress IM2…
邻频调制器、解调器、混合器等前端传输设备；
The products include the head end transmission equipments as adjacent modulator, demodulator, mixer;
邻频调制器、解调器、混合器等前端传输设备；
The products include the head end transmission equipments as adjacent modulator, demodulator, mixer;
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