Spherical arrays for wireless channel characterization and emulation

Fránek, Ondřej; Pedersen, Gert Frølund

doi:10.1109/apwc.2014.6905568

Cited by 2 publications

(1 citation statement)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Design trade-offs of spherical arrays are investigated in [44], to show the performance advantage of the spherical array geometry. The basic geometrical analysis for the spherical arrays has been studied in [45], and characterization of spherical arrays for wireless channels has been studied in [46]. However, construction and analysis of spherical antenna arrays for general mobile communication systems and the corresponding beamforming performance have not been investigated in the literature.…”

Section: Introductionmentioning

confidence: 99%

Beamforming Using Uniform Spherical Arrays: Array Construction, Beam Characteristics, and Multi-Rank Transmission

Ryoo

Sung

2021

IEEE Access

View full text Add to dashboard Cite

5G new radio (NR) provides features such as enhanced mobile broadband (eMBB) services and massive machine-type communications (mMTC). Multiple-input multiple-output (MIMO) transmission is an essential technique to enable these features, using antenna arrays with a sufficient number of elements to generate accurate and high-gain beams to desired user locations. In newer services, various forms of mobile devices are expected to appear in diverse locations, and beamforming need to accommodate such directional diversification. However, utilization of existing array structures has a limitation in transmitting signals to arbitrary receiver positions in the three-dimensional space. Therefore, a new type of array capable of forming accurate beams in isotropic fashion is desired, and the corresponding transmission strategies need to be identified. In this paper, the construction and utilization of the three-dimensional uniform spherical array (USA) are investigated. Beamforming vectors and the basis codebook for such arrays are defined, and characteristics of the generated beams are analyzed via comparison to the beams produced by conventional arrays. Array parameters to minimize the inter-beam interference are determined, and multiuser transmission performance is evaluated using the proper configuration of the array. We also apply the radiation pattern to the antenna elements to present the sum-rate performance in practical settings. INDEX TERMS 5G NR, massive MIMO, beamforming, codebook, millimeter-wave, spherical array.

show abstract

Section: Introductionmentioning

confidence: 99%