移动多径衰落信道建模研究

Fu Li, H. Xiao, Yibing Guo, Jin Yang
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引用次数: 1

摘要

多径衰落是无线通信中主要的实际问题之一。移动环境中总是存在多路径问题,尤其是移动设备往往嵌入到周围环境中。针对宽带扩频移动系统中的多径衰落问题,提出了一种时变抽头线延迟模型。在本文中,我们提出使用频谱分析和阵列处理中发展的检测和估计技术来确定延迟路径(或抽头)的数量,估计每个路径的时间延迟,并在现实的移动环境中根据芯片速率信道信息估计每个延迟路径的抽头权重。仿真结果表明,该方法优于现有方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
On Modeling of a Mobile Multipath Fading Channel
Multipath fading is one of the major practical concerns in wireless communications. Multipath problem always exists in mobile environment, especially for mobile unit which is often embedded in its surroundings. A time-variant tapped line delay model has been used for multipath fading in a wide-band spread spectrum mobile system. In this paper, we proposed to use the detection and estimation techniques developed in spectrum analysis and array processing to determine the number of delay paths (or taps), to estimate the time delay of each path, and to estimate tap weight of each delay path based on chip rate channel information in a realistic mobile environment. Simulations show that the new approach outperforms the existing approaches.
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