Spatial channel characteristics in the outdoor hotspot environment based on wideband MIMO measurements |
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| Authors: | Gao Xinying Zhang Jianhua Dong Weihui Zhang Ping |
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| Institution: | 1. Wireless Technology Innovation Institute,Beijing University of Posts and Telecommunications,Beijing 100876,P.R.China
2. Key Laboratory of Universal Wireless Communications,Ministry of Education,Beijing University of Posts and Telecommunications,Beijing 100876,P.R.China |
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| Abstract: | Wideband multiple-input multiple-output (MIMO) channel measurements were performed at 5.25GHz in the hotspot environment in Beijing. The propagation mechanism was line-of-sight and obstructed-line-of-sight (LOS/OLOS) in the outdoor scenario. Using a large amount of estimated angle of departure (AoD) and angle of arrival (AoA) results, the cumulative distribution functions (CDFs) of directional spread (DS) are extracted, which illustrate that the spatial dispersion is quite significant at both ends due to the low antenna height of base station and rich scatterers. The average power azimuth spectrum (PAS) is found to be well fitted with a Laplacian function. In addition, the non-isotropic property of spatial correlation is investigated, and the average envelop correlation over arbitrary antenna spacing provides the correlation distance to facilitate the MIMO optimization and deployment in the outdoor hotspot environment. |
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| Keywords: | wideband multiple-input multiple-output (MIMO) channel measurements directional spread (DS) power azimuth spectrum (PAS) envelope correlation |
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