求翻译：多径衰减是无线通信的一大障碍，传统的无线技术由于受到建筑物内部和周围多径的困扰，难以对有多径干扰的位置进行精确的跟踪，而且在建筑物很拥挤的环境中很难分辨目标。此外，多径干扰和衍射现象也使传统无线电的传输特性变差，这在建筑物中尤为明显，而UWB技术特别适合室内使用，它有抗多径衰落的固有鲁棒性。UWB非常窄的波形使从信道的多个反射被独立分辨，而不是在接收端被破坏，从而在窄带系统中的时变衰落被大大减小。UWB其定位精度小于几个厘米，并通常遵循自由空间传播规律。是什么意思？

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Multi-path attenuation is the wireless communications, one of the major obstacles of traditional wireless technology inside of the building because of the multi-path and around the problem, it is difficult to have a multi-path interference with the precise location of the track, and in the building

Multipath Fading is a major impediment to wireless communication, traditional wireless technologies due to the buildings in and around plagued multipath, multipath interference is difficult to precisely track the location, but also in building it's hard to tell in a crowded environment goals. In add