Wideband channel model for aeronautical telemetry
Wideband channel model for aeronautical telemetry
复制标题
航空遥测宽带信道模型
DOI：
10.1109/taes.2004.1292142
复制
发表时间：
2004
影响因子：
4.4
通讯作者：
C. Bettweiser
中科院分区：
文献类型：
--
作者：
Michael Rice;A. Davis;C. Bettweiser
提出了一种宽带航空遥测链路的多径信道模型。通道探测数据是在加利福尼亚州爱德华空军基地收集的，在L波段和较低的S波段。频域分析技术被用来评估候选信道模型。信道模型由三条传播路径组成：一条视线直达路径和两条镜面反射路径。第一镜面反射的特征在于相对幅度为视线幅度的70%至96%，延迟为10-80 ns。这条路径是爱德华兹干湖床“地面反弹”的结果，也是美国西部国防部试验场的典型地形特征。该路径的幅度和延迟完全由飞行路径几何形状定义。第二路径具有低得多的幅度和较长的延迟。该路径的增益被很好地建模为零均值复高斯随机变量。相对振幅约为视线振幅的2%至8%。平均额外延迟为155 ns，均方根延迟扩展为74 ns。
A multipath channel model for wideband aeronautical telemetry links is presented. Channel sounding data were collected at Edwards AFB, CA, at both L-band and lower S-band. Frequency domain analysis techniques were used to evaluate candidate channel models. The channel model is composed of three propagation paths: a line-of-sight direct path and two specular reflections. The first specular reflection is characterized by a relative amplitude of 70% to 96% of the line-of-sight amplitude and a delay of 10-80 ns. This path is the result of "ground bounces" off the dry lake bed at Edwards and is a typical terrain feature at DoD test ranges located in the western United States. The amplitude and delay of this path are defined completely by the flight path geometry. The second path has much lower amplitude and a longer delay. The gain of this path is well modeled as a zero-mean complex Gaussian random variable. The relative amplitude is approximately 2% to 8% of the line-of-sight amplitude. The mean excess delay is 155 ns with an rms delay spread of 74 ns.