低轨卫星的信道与地面无线信道具有不同的特点，低信噪比与大多普勒频移是低轨卫星信道的两个显著特征。
The channel of LEO satellite is different from wireless channels on the ground. Low SNR and large Doppler shift are the two characteristic of LEO satellite channel.
相对于一般的通信系统而言，低轨卫星通信系统具有信号动态范围大，多普勒频移大且变化速度快，信道起伏剧烈等特点。
LEO satellite communication system has the properties of larger power dynamic range, larger and faster changed doppler frequency shift and rapid fluctuation compared to ordinary communication system.
其次，本文对低轨卫星移动通信信道模型进行了详细的分析。
Secondly, this paper gives a detail analysis for mobile communication channel model of low-orbit satellites.
这些都将为下一步在硬件平台上实现低轨卫星移动通信信道模拟器奠定了基础。
All these will afford more detailed theoretical basis for further studying and simulating low-orbit satellite mobile channels simulator in the hardware platform.
测试低轨卫星移动通信信道模拟器的硬件性能。
Test the specification of the LEO satellite communication channel simulator.
很多国家在建立了低轨卫星系统的同时，进行了卫星信道模拟器的研究。
Many countries get to research satellite communication channel emulator while building up low-orbiting satellite communication system.
针对具有点波束的低轨卫星移动通信系统，提出了一种信道动态预留策略。
A dynamic channel reserve strategy for LEO communication system with spot-beam is proposed.
通过对比几种典型的信道分配算法，结合低轨卫星系统自身的特点设计了一种自适应信道分配策略。
By comparing several typical channel assignment algorithms, combined with its own characteristics of LEO satellite systems, an improved adaptive channel allocation strategy was designed.
通过对比几种典型的信道分配算法，结合低轨卫星系统自身的特点设计了一种自适应信道分配策略。
By comparing several typical channel assignment algorithms, combined with its own characteristics of LEO satellite systems, an improved adaptive channel allocation strategy was designed.
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