标题: | 室内平坦快速衰落无线通信频道之Rician Factor研究 Investigation on the Rician Factor of Indoor Flat Fast Fading Radio Channels |
作者: | 林仲铄 Lin, Chung-So 唐震寰 Jenn-Hwan Tarng 电信工程研究所 |
关键字: | 无线通信频道;室内;Rician Factor;indoor |
公开日期: | 1996 |
摘要: | 本论文吾人提出一种最新发展的模式,它结合二维适应环境模式与随机 散射统计模式所组成的合并模式.其目的在探讨室内环境下平坦快速衰落 无线通信频道的 Rician Factor.一般统计模式被用来描述由于任意摆放 之散射体与粗糙表面边界所造成之散射场分量.在吾人的合并模式中,发现 经常被忽略之散射场的确有足够之效应去影响 Rician Factor 的分布,而 这个效应的大小,吾人用一个比例值 r 来表示.在吾人的合并模式中,提出 一个精确又合理的 Rician Factor 预估值,对于较大的 r 值,代表有较强 的散射场和较小的 K 值.此种情况经常发生在周遭环境有很大的散射物体 或者是在非视线传播的环境中. A newly developed hybrid model,composed of a two- dimensional(2-D)site-specific model and a randomly scattered model,is employed toinvestigation the Rician Factor of indoor flat fast fading channels.In our model,the averaged scattered( diffused)envelop,which has a significanteffect on the Rician Distribution and is usually neglected,can be effectivelyquantified by a ratio factor r. With a proper chosen value of r,our model yields a reasonable prediction accuracy of the Rician factor. It is foundthat a larger value of r represents a stronger scattered field and yields a small value of K,which is usually happened at the sites with heavy surroundingclutters or in NLOS(non Line-Of-Sign)propagation situations. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#NT850436068 http://hdl.handle.net/11536/62148 |
显示于类别: | Thesis |