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.
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；
The growing demand for wireless services has created the need for improving the spectral efficiency of wireless communications over fading channels.
日益增长的无线业务需求要求提高衰落信道上无线通信的频谱利用率。
In the future broadband wireless communications, there will be two severe challenges to be faced, which are frequency selective fading channels and bandwidth efficiency.
在未来宽带移动通信中，存在两个最严峻的挑战：多径衰落信道和带宽效率。
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