一种由短多径缓解技术增强的超宽带定位系统

B. Waldmann, Alexander Goetz, R. Weigel
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引用次数: 7

摘要

本文提出了一种利用超宽带技术实现高精度局部定位雷达的方法。该概念是基于标准的FMCW(调频连续波)雷达原理与短脉冲相结合,以满足官方监管机构给出的发射限制。通过这种方式,可以在密集的多路径室内环境中实现高精度,非常适合1D, 2D和3D定位。建立了一个原型,其工作在7.5 GHz的中心频率,利用1 GHz的带宽。通过本文提出的设置,可以测量两个无线单元之间的距离,实现标准偏差低至6毫米。此外,我们还研究了短多径传播的影响,并给出了一种适用的缓解技术的仿真结果。
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An ultra wideband positioning system enhanced by a short multipath mitigation technique
In this paper an approach for high precision local positioning radar using an ultra wideband technique is presented. The concept is based on the standard FMCW (frequency modulated continuous wave) radar principle combined with short pulses to fulfill the emission limits given by the official regulatory authorities. In this way, a high accuracy in dense multipath indoor environments can be achieved, ideally suited for 1D, 2D and 3D localization. A prototype was built which operates at a center frequency of 7.5 GHz utilizing a bandwidth of 1 GHz. With the setup presented in this paper the distance between two wireless units can be measured achieving a standard deviation down to 6 mm. Additionally, we studied the effects of short multipath propagation and present simulation results for an applicable mitigation technique.
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