Stochastic/deterministic behavior of cross polarization discrimination in mmWave channels
Stochastic/deterministic behavior of cross polarization discrimination in mmWave channels
复制标题
毫米波信道中交叉极化鉴别的随机/确定性行为
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
R. Thomä
中科院分区：
文献类型：
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作者：
Naveed Iqbal;Jian Luo;C. Schneider;D. Dupleich;R. Müller;S. Hafner;R. Thomä
在毫米波（mmWave）频率处的大的绝对信道带宽和更定向的天线增益可能导致准确定性（较少随机性）信道衰落行为。交叉极化鉴别（XPD）中的随机性是与信道衰落行为相关的属性。在窄带信道中，它通常被建模为对数正态随机变量。从信道建模的角度来看，在一个特定的传播环境中的XPD功率电平和它的随机性程度的根本利益。在本文中，XPD行为的特点是作为一个函数的带宽在4个不同的传播设置，包括视线（LOS），从黑板的反射，粗糙的墙壁和双反弹反射从两个表面。已经观察到，在所有情况下，XPD在其平均值周围的变化系数随着信道带宽的增加而呈指数减小，这表明向准确定性信道行为的演进。此外，在所考虑的传播设置中，在窄带和UWB信道之间也观察到XPD值的5-10 dB差异。
Large absolute channel bandwidths at millimeter wave (mmWave) frequencies and more directional antenna gains may lead to quasi-deterministic (less random) channel fading behavior. Randomness in the cross polarization discrimination (XPD) is an attribute related to the channel fading behavior. In narrow-band channels, it is usually modeled as a log-normal random variable. From channel modeling perspectives, XPD power level in a particular propagation environment and its degree of randomness are of fundamental interest. In this paper, XPD behavior is characterized as a function of bandwidth in 4 different propagation setups including line of sight (LOS), reflections from black board, a rough wall and double bounce reflections from both surfaces. It has been observed that in all cases, the coefficient of variation of XPD around its mean value reduces exponentially with an increase in channel bandwidth demonstrating an evolution towards quasi-deterministic channel behavior. Additionally, a 5–10 dB difference in XPD values has also been observed between narrow-band and UWB channels in the considered propagation setups.