电离层信道的时变特性对短波授时的影响。
The Effects of Time-varying Ionospheric Channel on HF Timing.
高频电离层信道反射信号的幅度衰落服从瑞利分布。
Envelope fading of reflecting signals on HF ionospheric channels is Rayleigh fading.
研究通过具有加性高斯白噪声的瑞利慢衰落电离层信道的恒模盲均衡技术。
The constant modulus blind equalization technique is investigated over a slow Rayleigh fading ionospheric channels with additive white Gaussian noise.
第二、穿过随机电离层卫星信号二阶统计特性和电离层信道统计特性研究。
Second, the second-order statistical characteristics of satellite signals propagating through the turbulent ionosphere and properties of the ionospheric channel are also studied.
本文在瑞利衰落模型下，研究了高频电离层信道中多径时延与多普勒频移的随机特性。
In this paper, with Rayleigh fading the random characteristics of multipath time delay and Doppler shift in HF ionospheric channels is discussed.
在宽带信道模型的基础之上，从理论上分析了电波信号通过电离层信道所经受的衰落影响。
Based on the ITS channel model this paper theoretically discusses the fading effect of the ionosphere to the signal which is reflected by the ionosphere.
从该电子密度模式和电离层波传播特性出发确定多径分量，计算短波信道相干带宽。
The coherence bandwidth of shortwave channel is calculated by using the density profile and wave propagation features in ionosphere.
根据电离层影响无线电波传输的有关理论，本文设计并实现了一种基于DSP的话音带宽短波信道模拟器。
In this paper, a DSP-based HF channel simulator within audio bandwidth is designed and implemented based on the concerned theory on the effects caused by the ionosphere in radio wave.
由于卫星通信信道长，传输距离远，电波要穿过对流层和电离层，易使信号衰减，引入噪声，造成误码。
Due to satellite communication's long channel, far distance transmission and its wave through troposphere and ionosphere often brings the signal deamplification, noise and wrong code.
本文从信道的统计特性出发，介绍了仿真研究所用的一种新的电离层宽带信道数学模型——ITS模型。
On the ground of the channel statistical characteristic, this paper introduces a new wideband channel model, ITS channel model, which is used by the emulation.
本文从信道的统计特性出发，介绍了仿真研究所用的一种新的电离层宽带信道数学模型——ITS模型。
On the ground of the channel statistical characteristic, this paper introduces a new wideband channel model, ITS channel model, which is used by the emulation.
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