无线通信基础知识讨论（Discussion on basic knowledge of wireless communication）.docVIP

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无线通信基础知识讨论（Discussion on basic knowledge of wireless communication）.doc

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无线通信基础知识讨论（Discussion on basic knowledge of wireless communication）

无线通信基础知识讨论（Discussion on basic knowledge of wireless communication） One of the basic topics in wireless communications: wireless channels 1, what are the characteristics of a wireless (mobile) channel relative to a finite channel? 2, the loss in wireless channel is generally divided into three levels, large scale (also called path loss), mesoscale (shadow fading) and small scale fading. What are the causes of the three losses? What are the characteristics of each? Shadow fading is generally modeled, and why is it distributed? What are the commonly used probability distributions in small-scale fading analysis? 3, there are three important effects in the mobile communication channel 4, what is the coherent time? What is coherent bandwidth? 5. What are the definitions of frequency selective fading, flat fading, fast fading and slow fading? 6, what are your understanding of wireless channel modeling methods? Can you make a brief analysis of what you know about channel modeling methods and how to verify the correctness of the channel model built? In particular, what are the modeling approaches for multipath and Doppler Murali (Rician) fading channels that are continuously changing over time? 7, multipath channel modeling requires that multipath should be independent. How should independence be reflected in channel modeling? This should also be the case for MIMO channels and multiuser channels. 8, MIMO channel modeling, sometimes required to consider the correlation between antennas, and how this correlation should be modeled? Please speak enthusiastically! At the same time, welcome to recommend relevant reference documents! Ppbird was published at 18:09 2006-10-25 [quote] or 2006-10-25 17:41 published by [i]biezs[/i] in 1, what are the characteristics of a wireless (mobile) channel relative to a finite channel? 2, the loss in wireless channel is generally divided into three levels, large scale (also called path loss), mesoscale (shadow fading) and small scale fading. Wha