这种新方法不但能够分辨时延结构紧密的多径分量，而且能有效改善多径衰减参数的估计。
The algorithm can distinguish close-spaced multipath components, and to improve multipath attenuation parameters estimation effectively.
但是电力线信道上存在的各种噪声、衰减和多径传播等问题，这些都大大提高了通信的难度。
But the noises, the attenuation and the multipath propagation inhering in the powerline make it very difficult to realize such kind of communication system.
该模型充分考虑了多径传播，以及频率和长度对衰减的影响，使其更具有实用价值。
The model has fully considered the multi way of transition, as well as the frequency and length affected to the reduction in order to have more practical value.
接着介绍了超宽带的脉冲形成方式、调制方式、收发机系统结构、信号衰减模型、室内多径信道模型以及各种多址系统，为后面的章节做好铺垫。
Then introduces the pulse waveform, the architecture of the UWB transceiver, the fading models of the signal, the indoor channel models, at last some multiple access systems are presented as follow.
电力线通信存在随机高斯噪声干扰、多径效应和信道衰减，严重制约了高速数据的传输。
There are stochastic Gaussian noise, multi-path effect and attenuation in the power line communication. It is difficult to transmit high-speed streams.
电力线通信存在随机高斯噪声干扰、多径效应和信道衰减，严重制约了高速数据的传输。
There are stochastic Gaussian noise, multi-path effect and attenuation in the power line communication. It is difficult to transmit high-speed streams.
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