本文研究多径衰落信号的多重分形性质，分析并指出了信号多重分形维数是描述无线信道传播特性的重要参数；

Fractal characteristic of multipath fading signal is studied in the paper which shows that multifractal dimension is a key parameter for describing the signal propagation in wireless channels.

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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.

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从随机桥过程出发引入随机波束概念，使用随机波束研究超宽带(uwb)室内多径信道的传播特性。

Based on stochastic bridge processes, an idea of stochastic beams is introduced, which can be used to exploit the propagation characteristics of Ultra-wideband (UWB) indoor multipath channels.

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