System Architecture Of Mmic-Based Large Aperture Arrays For Space Applications

1987 ◽  
Author(s):  
P. R. Herczfeld ◽  
M. Kam ◽  
R. R. Kunath ◽  
K. B. Bhasin ◽  
Nick L. Prade
Keyword(s):  
System Architecture ◽  
Space Applications ◽  
Large Aperture ◽  
Aperture Arrays

Very large aperture optics for space applications

1994 ◽  
Author(s):  
Tom Horwath ◽  
J. P. Smith ◽  
M. T. Johnson
Keyword(s):  
Space Applications ◽  
Large Aperture

scholarly journals Fortuitous underwater acoustic measurements of baleen whale vocalizations by large aperture arrays

1993 ◽  
Vol 94 (3) ◽  
pp. 1822-1822
Author(s):  
G. L. D’Spain ◽  
J. A. Hildebrand ◽  
M. A. McDonald ◽  
W. S. Hodgkiss
Keyword(s):  
Baleen Whale ◽  
Acoustic Measurements ◽  
Underwater Acoustic ◽  
Large Aperture ◽  
Aperture Arrays

scholarly journals Modeling the near-field of extremely large aperture arrays in massive MIMO systems

2020 ◽  
Vol 12 (3) ◽  
pp. 39-46
Author(s):  
Botond Tamás Csathó ◽  
Bálint Péter Horváth ◽  
Péter Horváth
Keyword(s):  
Spectral Efficiency ◽  
Massive Mimo ◽  
Communication Systems ◽  
Mimo Systems ◽  
Near Field ◽  
Channel Modeling ◽  
Base Stations ◽  
Design Parameters ◽  
Large Aperture ◽  
Aperture Arrays

Massive multiple-input multiple-output (MIMO) is a key technology in modern cellular wireless communication systems to attain a very high system throughput in a dynamic multi-user environment. Massive MIMO relies on deploying base stations equipped with a large number of antenna elements. One possible way to deploy base stations equipped with hundreds or thousands of antennas is creating extremely large aperture arrays. In this paper, we investigate channel modeling aspects of massive MIMO systems with large aperture arrays, in which many users are located in the near-field of the aperture. Oneand two-dimensional antenna geometries, different propagation models, and antenna element patterns are compared in terms of inter-user correlation, condition number of the multi-user channel matrix, and spectral efficiency to identify key design parameters and essential modeling assumptions. As our analysis reveals by choosing spectral-efficiency as a design objective, the size of the aperture is the critical design parameter.

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