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首页> 外文期刊>Wireless Communications Letters, IEEE >Level Crossing Rate and Average Fade Duration in F Composite Fading Channels
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Level Crossing Rate and Average Fade Duration in F Composite Fading Channels

机译：F个复合衰落信道的电平穿越速率和平均衰落持续时间

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摘要

In this letter, we derive exact closed-form expressions for the level crossing rate (LCR) and average fade duration (AFD) of the signal envelope in $mathcal {F}$ composite fading channels. Using the novel expressions, we then investigate the behavior of the LCR and AFD for different multipath fading and shadowing conditions. It is shown that multipath fading has a more significant effect on the LCR at lower fade levels while shadowing tends to have a discernible impact on higher threshold levels. In contrast, shadowing has a more noticeable effect on the AFD compared to multipath fading at both lower and higher levels. Approximate expressions for the LCR and AFD are also provided, and shown to be in good agreement with the exact LCR and AFD as they approach lower and higher threshold levels. The offered results are expected to be useful in the design of emerging systems such as device-to-device communications.
机译：在这封信中，我们得出了数学 {F} $复合衰落信道中信号包络的电平穿越率（LCR）和平均衰落持续时间（AFD）的精确封闭式表达式。然后，使用新颖的表达式，我们研究了LCR和AFD在不同的多径衰落和阴影条件下的行为。结果表明，在较低的衰落水平下，多径衰落对LCR的影响更大，而阴影往往对较高的阈值水平有明显的影响。相反，与较低和较高级别的多径衰落相比，阴影对AFD的影响更为明显。还提供了LCR和AFD的近似表达式，并且随着它们接近较低和较高的阈值水平，它们与确切的LCR和AFD非常吻合。预期提供的结果将对新兴系统的设计（例如设备到设备通信）有用。

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  • 来源
    《Wireless Communications Letters, IEEE》 |2020年第3期|281-284|共4页
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  • 作者单位

    Coventry Univ Sch Comp Elect & Math Coventry CV1 5FB W Midlands England;

    Queens Univ Belfast ECIT Inst Ctr Wireless Innovat Belfast BT3 9DT Antrim North Ireland;

    Khalifa Univ Dept Elect & Comp Engn Ctr Cyber Phys Syst Abu Dhabi U Arab Emirates|Tampere Univ Dept Elect Engn FIN-33101 Tampere Finland;

    Khalifa Univ Dept Elect & Comp Engn Ctr Cyber Phys Syst Abu Dhabi U Arab Emirates;

    Aristotle Univ Thessaloniki Dept Elect Comp Engn Thessaloniki 54124 Greece;

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  • 正文语种 eng
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  • 关键词

    Average fade duration; composite fading; Fisher-Snedecor F distribution and level crossing rate;

    机译：平均淡入淡出时间;复合衰落Fisher-Snedecor F分布和平交率;

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