Yurduseven Okan, Abbasi Muhammad Ali Babar, Fromenteze Thomas, Fusco Vincent
Centre for Wireless Innovation (CWI), Institute of Electronics, Communications and Information Technology (ECIT), School of Electronics, Electrical Engineering and Computer Science (EEECS), Queen's University Belfast, Belfast, BT3 9DT, UK.
XLIM Research Institute, University of Limoges, Limoges, 87060, France.
Sci Rep. 2019 Nov 13;9(1):16704. doi: 10.1038/s41598-019-53363-3.
We present a frequency-diverse based direction of arrival (DoA) estimation technique for millimetre-wave (mmW) 5G channel sounding. Frequency-diversity enables the creation of spatially incoherent radiation masks to encode the plane-wave signals incident on the radar aperture using a single antenna. Leveraging the frequency-diversity concept, spatial information of the plane-wave projections on the radar aperture is retrieved, resulting in high-fidelity DoA estimations by means of a simple Fourier transform operation applied to the retrieved plane-wave projection patterns. It is demonstrated that using the frequency-diversity concept, DoA estimation can be achieved through a simple frequency sweep, compressing the incoming plane-waves into a single channel through the transfer function of the radar aperture. This results in a significant simplification in the system hardware, requiring only a single antenna to achieve DoA estimation. It is also shown that the proposed technique can simultaneously detect the DoA information for multiple sources with a diffraction limited resolution.
我们提出了一种基于频率分集的毫米波（mmW）5G信道探测到达方向（DoA）估计技术。频率分集能够创建空间非相干辐射掩码，以使用单个天线对入射到雷达孔径上的平面波信号进行编码。利用频率分集概念，检索雷达孔径上平面波投影的空间信息，通过对检索到的平面波投影图案应用简单的傅里叶变换操作，实现高保真的DoA估计。结果表明，利用频率分集概念，通过简单的频率扫描即可实现DoA估计，通过雷达孔径的传递函数将入射平面波压缩到单个通道中。这显著简化了系统硬件，仅需单个天线即可实现DoA估计。还表明，所提出的技术能够以衍射极限分辨率同时检测多个源的DoA信息。
